Rabbit RabbitCore RCM4200 User Manual

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RabbitCore RCM4200

C-Programmable Analog Core Modul e

with Serial Flash and Ether net

User’s Manual

019–0159 • 090508–E

RabbitCore RCM4200 User’s Manual

Part Number 019-0159 • 090508–E • Prin ted in U .S.A .

No part of the contents of this manual may be reproduced or transmitted in any form or by any means without the express written permission of Digi International.

Permission is granted to make one or more copies as long as the copyright page contained therein is included. These copies of the manuals may not be let or sold for any reason without the express written permission of Digi International.

Digi International reserves the right to make changes and

improvements to its products without providing n otice.

T r ade mark s

Rabbit, RabbitCore, and Dynamic C are registered trademarks of Digi International Inc.

Rabbit 4000 is a trademark of Digi International Inc.

The latest revision of this manual is available on the Rabbit Web s ite, www.rabb it.com, for free, unregistered download.

Digi International Inc.

www.rabbit.com

RabbitCore RCM4200

Chapter 1. Introduction 1

1.1 RCM4200 Features...............................................................................................................................2

1.2 Advantages of the RCM4200 ...............................................................................................................4

1.3 Development and Evaluation Tools......................................................................................................5

1.3.1 RCM4200 Development Kit.........................................................................................................5

1.3.2 Software........................................................................................................................................6

1.3.3 Online Documentation..................................................................................................................6

Chapter 2. Getting Started 7

2.1 Install Dynamic C.................................................................................................................................7

2.2 Hardware Connections..........................................................................................................................8

2.2.1 Step 1 — Prepare the Prototyping Board for Development..........................................................8

2.2.2 Step 2 — Attach Module to Prototyping Board............................................................................9

2.2.3 Step 3 — Connect Programming Cable......................................................................................10

2.2.4 Step 4 — Connect Power............................................................................................................11

2.3 Run a Sample Program.......................................................................................................................12

2.3.1 Troubleshooting..........................................................................................................................12

2.4 Where Do I Go From Here? ...............................................................................................................13

2.4.1 Technical Support.......................................................................................................................13

Chapter 3. Running Sample Programs 15

3.1 Introduction.........................................................................................................................................15

3.2 Sample Programs................................................................................................................................16

3.2.1 Use of Serial Flash......................................................................................................................18

3.2.2 Serial Communication.................................................................................................................19

3.2.3 A/D Converter Inputs (RCM4200 only).....................................................................................22

3.2.3.1 Downloading and Uploading Calibration Constants.......................................................... 23

3.2.4 Real-Time Clock.........................................................................................................................25

Chapter 4. Hardware Reference 27

4.1 RCM4200 Digital Inputs and Outputs................................................................................................28

4.1.1 Memory I/O Interface.................................................................................................................34

4.1.2 Other Inputs and Outputs............................................................................................................34

4.2 Serial Communication ........................................................................................................................35

4.2.1 Serial Ports..................................................................................................................................35

4.2.1.1 Using the Serial Ports......................................................................................................... 36

4.2.2 Ethernet Port ...............................................................................................................................37

4.2.3 Programming Port.......................................................................................................................38

4.3 Programming Cable............................................................................................................................39

4.3.1 Changing Between Program Mode and Run Mode....................................................................39

4.3.2 Standalone Operation of the RCM4200......................................................................................40

User’s Manual

4.4 A/D Converter (RCM4200 only).......................................................................................................41

4.4.1 A/D Converter Power Supply.....................................................................................................43

4.5 Other Hardware..................................................................................................................................44

4.5.1 Clock Doubler ............................................................................................................................44

4.5.2 Spectrum Spreader......................................................................................................................44

4.6 Memory..............................................................................................................................................45

4.6.1 SRAM.........................................................................................................................................45

4.6.2 Flash EPROM.............................................................................................................................45

4.6.3 Serial Flash.................................................................................................................................45

Chapter 5. Software Reference 47

5.1 More About Dynamic C .....................................................................................................................47

5.2 Dynamic C Function Calls................................................................................................................49

5.2.1 Digital I/O...................................................................................................................................49

5.2.2 Serial Communication Drivers...................................................................................................49

5.2.3 User Block..................................................................................................................................49

5.2.4 SRAM Use..................................................................................................................................50

5.2.5 RCM4200 Cloning.....................................................................................................................50

5.2.6 Serial Flash Drivers....................................................................................................................51

5.2.7 Prototyping Board Function Calls..............................................................................................52

5.2.7.1 Board Initialization............................................................................................................ 52

5.2.7.2 Alerts.................................................................................................................................. 53

5.2.8 Analog Inputs (RCM4200 only).................................................................................................54

5.3 Upgrading Dynamic C .......................................................................................................................71

5.3.1 Add-On Modules........................................................................................................................71

Chapter 6. Using the TCP/IP Features 73

6.1 TCP/IP Connections...........................................................................................................................73

6.2 TCP/IP Primer on IP Addresses.........................................................................................................75

6.2.1 IP Addresses Explained..............................................................................................................77

6.2.2 How IP Addresses are Used.......................................................................................................78

6.2.3 Dynamically Assigned Internet Addresses.................................................................................79

6.3 Placing Your Device on the Network ................................................................................................80

6.4 Running TCP/IP Sample Programs....................................................................................................81

6.4.1 How to Set IP Addresses in the Sample Programs .....................................................................82

6.4.2 How to Set Up your Computer for Direct Connect....................................................................83

6.5 Run the PINGME.C Sample Program................................................................................................84

6.6 Running Additional Sample Programs With Direct Connect............................................................84

6.7 Where Do I Go From Here?...............................................................................................................85

Appendix A. RCM4200 Specifications 87

A.1 Electrical and Mechanical Characteristics ........................................................................................88

A.1.1 A/D Converter...........................................................................................................................92

A.1.2 Headers......................................................................................................................................93

A.2 Rabbit 4000 DC Characteristics........................................................................................................94

A.3 I/O Buffer Sourcing and Sinking Limit.............................................................................................95

A.4 Bus Loading ......................................................................................................................................95

A.5 Conformal Coating............................................................................................................................98

A.6 Jumper Configurations......................................................................................................................99

Appendix B. Prototyping Board 101

B.1 Introduction .....................................................................................................................................102

B.1.1 Prototyping Board Features.....................................................................................................103

B.2 Mechanical Dimensions and Layout...............................................................................................105

B.3 Power Supply...................................................................................................................................106

RabbitCore RCM4200

B.4 Using the Prototyping Board............................................................................................................107

B.4.1 Adding Other Components.......................................................................................................109

B.4.2 Measuring Current Draw..........................................................................................................109

B.4.3 Analog Features (RCM4200 only)...........................................................................................110

B.4.3.1 A/D Converter Inputs...................................................................................................... 110

B.4.3.2 Thermistor Input.............................................................................................................. 112

B.4.3.3 A/D Converter Calibration.............................................................................................. 112

B.4.4 Serial Communication..............................................................................................................113

B.4.4.1 RS-232............................................................................................................................. 114

B.5 Prototyping Board Jumper Configurations ......................................................................................115

Appendix C. Power Supply 119

C.1 Power Supplies.................................................................................................................................119

C.1.1 Battery Backup.........................................................................................................................119

C.1.2 Battery-Backup Circuit.............................................................................................................120

C.1.3 Reset Generator........................................................................................................................121

Index 123

Schematics 127

User’s Manual

RabbitCore RCM4200

1. INTRODUCTION

The RCM4200 series of RabbitCore modules is one of the next generation of core modules that tak e advantage of n ew Rabbit

4000 features such as hardware DMA, clock speeds of up to 60 MHz, I/O lines shared with up to six serial ports and four levels of alternate pin functions that include variable-phase PWM, auxiliary I/O, quadrature decoder, and input capture. Coupled with more than 500 new opcode instructions that help to reduce code size and improve processing speed, this equates to a core module that is fast, effi cient, and the ideal solution for a wide range of embedded applications. The RCM4200 also features an integrated 1 0/100Base-T Etherne t port, an A/D converter, and a serial flash memory for mass storage.

Each production mode l has a Developmen t Kit with th e essential s that you need to design your own microproces sor-based system,

and includes a comp lete Dynamic C software development system. The Development Kits also contains a Prototyping Board that will allow you to evaluate the specific RCM4200 module and to prototype circuits that interface to the module. You will also be able to write and test software for the RCM4200 modules.

Throughout this manual, the term RCM4200 refers to the complete series of RCM4200 RabbitCore modules unless other production models are referred to specifically.

The RCM4200 has a Rabbit 4000 microprocessor operating at up to 58.98 MHz, static RAM, flash memory, serial flash mass-storage option, an 8-channel A/D converter, two clocks (main oscillator and timekeeping), and the circuitry necessary for reset and management of battery backup of the Rabbit 4000’s internal real-time clock and 512K of static RAM. One 50-pin header brings out the Rabbit 4000 I/O bus lines, parallel ports, A/D converter channels, and serial ports.

The RCM4200 receives its +3.3 V power from the customer-supplied motherboard on which it is mounted. The RCM4200 can interface with all kinds of CMOS-compatible digital devices through the motherboard.

User’s Manual 1

1.1 RCM4200 Features

• Small size: 1.84" × 2.42" × 0.84" (47 mm × 61 mm × 21 mm)

• Microprocessor: Rabbit 4000 running

at up to 58.98 MHz

• Up to 33 general-purpose I/O lines configurable with up to four alternate functions

• 3. 3 V I/O li nes wi th low-p ow er mo des dow n to 2 kH z

•

Up to six CMOS-compatible serial ports — f

our ports are configurable as a clocked

serial ports (SPI), and two ports are configurable as SDLC/HDLC serial ports.

• Combinations of up to eight single-ended or four differential 12-bit analog inputs (RCM4200 only)

• Alternate I/O bus can be configured for 8 data lines and 6 address lines (shared with parallel I/O lines), I/O read/write

• 512K flash memory, 512K SRAM, and a fixed mass-storage flash-memory option that may be used with the standardized directory structure supported by the Dynamic C F AT File System module

• Real-time clock

• Watchdog supervisor

2 RabbitCore RCM4200

There are two RCM4200 production models. Table 1 summarizes their main features.

Table 1. RCM4200 Features

Feature RCM4200 RCM4210

Microprocessor Data SRAM 512K

Fast Program-Execution SRAM

Flash Memory (program) 512K Flash Memory

(mass data storage) A/D Converter 12 bits —

4 high-speed, CMOS-compatible ports:

• all 4 configurable as asynchro-

• 1 asynchronous clocked serial

Serial Ports

• 1 clo cked serial port shared with

Rabbit

4000 at 58.98 MHz Rabbit® 4000 at 29.49 MHz

512K —

8 Mbytes (serial flash) 4 Mbytes (serial flash)

5 high-speed, CMOS-compatible ports:

• all 5 configurable as asynchro-

nous (with IrDA), 4 as clocked serial (SPI)

port shared with programming port

nous (with IrDA), 4 as clocked serial (SPI), and 1 as SDLC/HDLC

• 1 clo cked serial port shared with

serial flash

• 1 asynchronous clocked serial

serial flash

port dedicated for programming

• 1 clo cked serial port shared with

A/D converter

The RCM4200 is programmed over a stan dard P C USB por t thr ough a pro gramm ing cabl e supplied with the Development Kit.

NOTE: The RabbitLink cannot be used to program RabbitCore modules based on the

Rabbit 4000 microprocessor.

Appendix A provides detailed specifications for the RCM4200.

User’s Manual 3

1.2 Advantages of the RCM4200

• Fast time to market using a fully engineered, “ready-to-run/ready-to-program” microprocessor core.

• Compe tit ive prici ng whe n co mpare d with the alte rnati v e of purcha sing a nd asse mbli ng individual components.

• Easy C-language program development and debugging

• Rabbit Field Utility to download compiled Dynamic C .bin files, and cloning board

options for rapid production loading of programs.

• Generous memory size allows large programs with tens of thousands of lines of code, and substantial data storage.

4 RabbitCore RCM4200

1.3 Development and Evaluation Tools

1.3.1 RCM4200 Development Kit

The RCM4200 Development Kit contains the hardware essentials you will need to use the RCM4200 module. The items in the Development Kit and their use are as follows.

• RCM4200 module.

• Prototyping Board.

• Universal AC adapter, 12 V DC, 1 A (includes Canada/Japan/U.S., Australia/N.Z.,

U.K., and European style plugs). Development Kits sold in North America ma y contain an AC adapter with only a North American style plug.

• USB programming cable with 10-pin header.

10-pin header to DB9 serial cable.

•

• Dynamic C® CD-ROM, with complete product documentation on disk.

• Getting Started instructions.

• A bag of accessory parts for use on the Prototyping Board.

• Rabbit 4000 Processor Easy Reference poster.

• Registration card.

DIAG

PROG

Getting Started

Programming

Cable

RabbitCore RCM4200

The RCM4200 RabbitCore module features an onboard A/D converter and 10/100Base-T Ethernet, allowing you to create a low-cost, low-power, network as part of your control solution for your embedded application. These Getting Started instructions included with the Development Kit will help you get your RCM4200 up and running so that you can run the sample programs to explore its capabilities and develop your own applications.

Development Kit Contents

The RCM4200 Development Kit contains the following items:

• RCM4200 module.

• Prototyping Board.

• Universal AC adapter, 12 V DC, 1 A (includes Canada/Japan/U.S., Australia/N.Z., U.K., and European

style plugs). Development Kits sold in North America may contain an AC adapter with only a North American style plug.

• USB programming cable with 10-pin header.

• 10-pin header to DB9 serial cable.

• Dynamic C

CD-ROM, with complete product documentation on disk.

• Getting Started instructions.

• Plastic and metal standoffs with 4-40 screws and washers.

• A bag of accessory parts for use on the Prototyping

Board.

• Rabbit 4000 Processor Easy Reference poster.

• Registration card.

Visit our online Rabbit store at www.rabbit.com/store/ for the latest information on peripherals and accessories that are available for all RCM4200 RabbitCore module models.

Rabbit and Dynamic C are registered trademarks of Rabbit Semiconductor Inc.

Installing Dynamic C

Insert the CD from the Development Kit in your PC’s CD-ROM drive. If the installation does not auto-start, run the setup.exe pro- gram in the root directory of the Dynamic C CD. Install any Dynamic C modules after you install Dynamic C

Instructions

Universal

AC Adapter

with Plugs

Accessory Parts for

Prototyping Board

PWR

R 1

DS1

GND

1 D

1 P

9 1

C15

R29

R20

2 1 C

5 6

C21

8 1 R

R8R6R4R3R5R

R37 R21

C8C7C

1 6

X R

R22

JP16 JP6

C18

JP5

JP12

JP4

JP3

JP14

JP8

C16

JP7 JP18 JP9

JP10

R25

6 2 R

PC3

PC5

PC7

PE1

3 1 P

PE3

R19

PE5

PE6

PD0

PE7

LN0

PD1

PD2

C53

LN1

LN2

1 1

PD4

PD3

C6C7R4

LN4

LN3

41 R

PD6

PD5

LN6

LN5

JP3

PD7

CVT

LN7

C17

VREF

AGND

C18

C52

C56

R23

Serial Cable

R10

RX43

R38

TP2

RX97

RX59

RX57

RX55

RX49

R13

C10

C11

C12

C13

C14

R10

C15

R11

RP1

C16

R12

JP4

UX3

JP5

JP6

C20

2 U

PB1

PB3

PB5

PB7

PC1

PC4

PC6

PE0

PE2

PE4

D N I

2 1

1 1

+5 V

2 P

GND

/RST_OUT

/IORD

+3.3 V

RCM1

/IOWR

/RST_IN

VBAT

PA0

EXT

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PB0

PB2

PB4

PB6

PC0

PC2

8 X R

RX75

CX25

DS2

JP25

9 2

CX27

RX73

X C

RX77

RX79

CX23

DS3

R21

UX16

R22

R24

R23

GND

S3S2

BT1

RESET

UX49

UX47

RX83

RX11

4 X U

UX10

7 1

RX67

X C

UX12

UX14

UX4

D N G

4 J

9 2

RX81

7 8 X R

4 X C

3 X C

UX30

Prototyping Board

Figure 1. RCM4200 Development Kit

User’s Manual 5

1.3.2 Software

The RCM4200 is programmed using version 10.09 or later of Dynamic C. A compatible

version is included on the Development Kit CD-ROM.

Rabbit Semiconductor also offers add-on Dynamic C modules containing the popular µC/OS-II real-time operating system, the FAT file system, as well as PPP, Advanced Encryption Standard (AES), and other select libraries. In addition to the Web-based technical support included at no extra charge, a one-year telephone-based technical support module is also available for purchase. Visit our Web site at www.rabbit.com or contact your Rabbit Semiconductor sales representative or authorized distributor for further information.

1.3.3 Online Documentation

The online documentation is installed along with Dynamic C, and an icon for the documentation menu is placed on the workstation’s desktop. Double-click this icon to reach the menu. If the icon is missing, use your browser to find and load default.htm in the docs folder, found in the Dynamic C installation folder.

The latest versions of all documents are always available for free, unregistered download from our Web sites as well.

6 RabbitCore RCM4200

2. GETTING S TARTED

This chapter describes the RCM4200 hardware in more detail, and explains how to set up and use the accompanying Prototyping Board.

NOTE: This chapter (and thi s manual) assume that you have t he RCM4200 Development

Kit. If you purchased an RCM4200 module by itself, you will have to adapt the information in this chapter and elsewhere to your test and development setup.

2.1 Install Dynamic C

To develop and de bu g programs for the RCM4200 se ries of mod ule s ( and for all ot h er Rabbit Semiconductor hardware), you must install and use Dynamic C.

If you have not yet installed Dynamic C version 10.09 (or a later version), do so now by inserting the Dynamic C CD from the Development Kit in your PC’s CD-ROM drive. If autorun is enabled, the CD installation will begin automatically.

If autorun is disabled or the installation does not start, use the Windows Start | Run menu or Windows Disk Explorer to launch setup.exe from the root folder of the CD-ROM.

The installation program will guide you through the installation process. Most steps of the process are self-explanatory.

Dynamic C uses a COM (serial ) port to c ommunica te with the tar get developme nt syste m. The installation allows you to choose the COM port that will be used. The default selection is COM1. You may select any available port for Dynamic C’s use. If you are not certain which port is available, select COM1. This selection can be changed later within Dynamic C.

NOTE: The installation utility does not check the selected COM port in any way. Speci-

fying a port in u se by a nother device (mouse, modem, etc.) may lead to a message such as

"could not open serial port" when Dynamic C is started.

Once your installation is complete, you will have up to three new icons on your PC desktop. One icon is for Dynamic C, another opens the documentation menu, and the third is for the Rabbit Field Utility, a tool used to download precompiled software to a target system.

If you have purchased any of the optional Dynamic C modules, install them after installing Dynamic C. The modules may be installed in any order. You must install the modules in the same directory where Dynamic C was installed.

User’s Manual 7

2.2 Hardware Connections

There are three steps to connecting the Prototyping Board for use with Dynamic C and the sample programs:

1. Prepare the Prototyping Board for Development.

2. Attach the RCM4200 module to the Prototyping Board.

3. Connect the programming cable between the RCM4200 and the PC.

4. Connect the power supply to the Prototyping Board.

2.2.1 Step 1 — Prepare the Prototyping Board for Development

Snap in four of the plastic standoffs supplied in the bag of accessory parts from the Development Kit in the holes at the corners as shown in Figure 2.

PWR

1 D

2 U

JP16

JP6

C18

JP5

JP12

JP4

JP3

JP14

JP8

C16

JP7

JP18

JP9

JP10

R25

C15

R29

JP11JP15JP19JP21JP22

R20

R18R16R14R13R15R

R10

RX43

47 X R

RX97

RX49

X33U

31 X

89 X R

UX3

R8R6R4R3R5R

C8C7C

C14C12C

JP24JP

RX59

RX57

RX55

42 X

X U

63 X

PC1

PC3

PC5

PC7

JP20

JP17

PE1

PE3

R19

PE5

PE7

PD1

LN1

LN2

PD4

PD3

LN4

LN3

PD6

PD5

LN6

LN5

PD7

CVT

LN7

VREF

AGND

F E

7INLN5INLN3INLN1IN

6INLN4INLN2INLN0IN

DS1

GND

JP 3

2 D

/RST_OUT

RCM1

/IOWR

VBAT EXT

PA1

PA3

PA5

PA7

PB1

PB2

PB3

PB4

PB5

PB6

PB7

PC0

PC2

PC4

PC6

PE0

PE2

PE4

PE6

PD0

LN0

PD2

N G A

D N G

2 R

4 C

3.3 V +

GND

/IORD

/RST_IN

PA0

PA2

PA4

PA6

PB0

RX75

CX25

DS2

JP25

UX47

+5 V

GND

+3.3 V

CX27

RX73

R23

RX79

RX77

CX23

DS3

R21

R22

R24

GND

R27R

GND

S3S2

BT1

RESET

UX49

UX4

RX81

X R

RX83

39 X C

RX11

X45 U

RX67

X C

GND

UX10

X17

UX12

UX14

UX16

C XD R

X41

UX30

Figure 2. Insert Standoffs

8 RabbitCore RCM4200

2.2.2 Step 2 — Attach Module to Prototyping Board

Turn the RCM4200 module so that the mounting holes line up with the corresponding holes on the Prototyping Board. Insert the metal standoffs as shown in Figure 3, secure them from the bottom using two screws and washers, then insert the module’s header J2 on the bottom side into socket RCM1 on the Prototyping Board.

Insert standoffs between mounting holes and Prototyping Board.

RCM4200

Line up mounting holes with holes on Prototyping Board.

C58

C67

C88

C81

C57

R34

U13

R35

R33

R32

C65

C87

DS1

C24

LINK

JP16

R47

FDX

R49

R13

DS3

DS2

R48

C25

R52

SPEED

C19

R50

C26

C20

C31

C33

C32

C34

C30

C35

C36

C37

C38

R18

R21

R19

R15

C23

R23

R22 C28 C29

C77

R14

R12

R36

C85

R29

C18

C10

C11

C12

JP8

C13 C14

C39

R10

C21

C15

C27

R27

R11

R16

C43

C82

R31

R20

C72

C78

JP14

JP15

U14

JP13

C74

U15

R51

C76

R41

R40

C75

JP11

JP10

JP12

JP1

JP2

JP9

JP6

JP7

JP3

JP5

C17

C16

JP4

C86

R46

R44

R45

R39

R43

R42

RX43

RX47

RX97

PWR

C18

C19 C20

C15

R29

RX55

RX49

UX33UX31

RX89

UX3

C17

C16

R25

JP24

UX41

UX37 UX42

JP16

JP6 JP5

JP12

JP4 JP3

JP14

JP8 JP7

JP18

JP9

JP10

R26

R20

R10

JP23

RX57

DS1

GND

RCM1

JP11

JP15

JP19

JP21

R18

R16

R14

R8R6R4R3R5

C8C7C9

C14

C12

C10

RX59

RX63

GND

RCM1

JP22

JP20

R13

R15

RX61

RX65

JP1

+3.3 V

JP2

/RST_OUT

/IOWR

VBAT

EXT

PA1

PA3

PA5

PA7

PB1

PB3

PB5

PB7

PC1

PC3

PC5

PC7

JP17

PE1

JP13

PE3

R19

R17

PE5

PE7

PD1 LN1

C11

C13

PD3 LN3

PD5 LN5

PD7 LN7

VREF

UX47

+5 V

GND

/IORD

+3.3 V

/RST_IN

PA0

PA2

PA4

PA6

PB0

PB2

PB4

PB6

PC0

PC2

PC4

PC6

PE0

PE2

PE4

PE6

PD0 LN0

PD2 LN2

PD4 LN4

PD6 LN6

CVT

AGND

VREF

LN7IN

LN5IN

LN3IN

LN1IN

AGND

CVT

AGND

LN6IN

LN4IN

LN2IN

LN0IN

BT1

RESET

UX49

UX4

RX75

CX27

RX73

CX25

RX77

CX23

DS3

DS2

R21

JP25

R23

R12

R11

R27

RXD TXD

TXC RXC

GND

RX81

RX83

RX11

UX45

RX67

RX85

RX79

R22

R24

R28

GND

S3S2

UX29

RX87

CX41

CX39

UX30

UX10

CX17

UX12

UX14

CX29

UX16

GND

Figure 3. Install the Module on the Prototyping Board

NOTE: It is important that you line up the pins on header J2 of the module exactly with

socket RCM1 on the Pr ototyp ing Boa rd. The header pins may bec ome b ent or da maged if the pin alignment is offset, and the module will not work. Permanent electrical damage to the module may also result if a misaligned module is powered up.

Press the module’s pins gently into the Prototyping Board socket—press down in the area above the header pins. For additional integrity, you may secure the RCM4200 to the standoffs from the top using the remaining two screws and washers.

User’s Manual 9

2.2.3 Step 3 — Connect Programming Cable

The programming cable connects the module to the PC running Dynamic C to download programs and to monitor the module during debugging.

Connect the 10-pin connector of the programming cable labeled

PROG to header J1 on

the RCM4200 as shown in Figure 4. Be sure to orient the marked (usually red) edge of the cable towards pin 1 of the connector. (Do not use the DIAG connector , which is used for a normal serial connection.)

Remove slot cover,

insert tab into slot

Assemble

AC Adapter

Snap plug into place

AC Adapter

3-pin

power connector

Programming

Cable

or USB port

PC COM port

PROG

Colored

edge

PWR

DS1

C24

LINK

JP16

R47

FDX

R49

R13

R14

DS3

R12

DS2

R48

C25

R52

SPEED

R50

C31

C33

C32

C34

C30

C35

C36

C37

C38

R19

C23

C28 C29

C19

C26

C18

C20

C11

RX43

C12

RX47

R18

R21

RX97

R10

C21

RX49

C27

R15

R23

R22

R11

R16

RX89

GND

DIAG

C58

C67

C88

C19 C20

R36

R29

C10

C13 C14 C39

UX33UX31

UX3

C82

C81

C57

R31

R20

R34

JP16

R51

JP6

U13

C18

C76

JP5

C17

R35

JP12

JP4 JP3

R33

JP14

JP8

R32

C65

C16

JP7

R41

R40

JP18

C72

C75

JP9

C87

JP10

JP11

JP10

R25

C78

JP12

C77

C15

JP1

R26

JP14

JP2

JP15

JP9

U14

C85

JP6

JP13

R29

JP7

JP11

JP15

JP19

JP21

JP22

JP3

JP5

R20

C17

C16

C74

JP4

R18

R16

R14

R13

R10

U15

R8R6R4R3R5

C86

C8C7C9

C14

C12

C10

JP8

JP24

JP23

RX59

RX57

RX55

C15

R44

R27

UX41

R39 R42

UX37 UX42

RX63

C43 RCM1

JP20

R15

GND

R17

R46 R45

RX61

R43

RX65

JP1

JP2

/RST_OUT

/IOWR

PROG

VBAT

EXT

PA1

PA3

PA5

PA7

PB1

PB3

PB5

PB7

PC1

PC3

PC5

PC7

JP17

PE1

JP13

PE3

R19

PE5

PE7

PD1 LN1

C11

C13

PD3

PD5

PD7

VREF

+3.3 V

LN3

LN5

LN7

UX47

+5 V

GND

/IORD

+3.3 V

/RST_IN

PA0

PA2

PA4

PA6

PB0

PB2

PB4

PB6

PC0

PC2

PC4

PC6

PE0

PE2

PE4

PE6

PD0 LN0

PD2 LN2

PD4 LN4

PD6 LN6

CVT

AGND

VREF

LN7IN

LN5IN

LN3IN

LN1IN

AGND

CVT

AGND

LN6IN

LN4IN

LN2IN

LN0IN

RESET

BT1

RESET

UX49

UX4

RXD TXD

TXC RXC

GND

RX81

RX83

RX11

RX67

RX75

CX25

DS2

JP25

R12

R11

RX85

CX27

RX73

RX77

RX79

CX23

DS3

R21

R22

R24

R23

R27

R28

GND

S3S2

UX29

RX87

CX41

CX39

UX30

UX45

UX10

CX17

UX12

UX14

CX29

UX16

GND

Figure 4. Connect Programming Cable and Power Supply

NOTE: Never disconnect the programming cable by pulling on the ribbon cable.

Carefully pull on the connector to remove it from the header.

NOTE: Either a serial or a USB programming cable was supplied with the Development

Kit. If you have a serial programming cable, an RS-232/USB converter (Rabbit Part No. 20-151-0178) is available to allow you to use the serial programming cable with a USB port.

Depending on the programming cable, connect the other end to a COM port or a USB port on your PC.

10 RabbitCore RCM4200

If you are using a USB programming cable, your PC should recognize the new USB hardware, and the LEDs in the shrink-wrapped area of the programming cable will flash — if you get an error message, you will have to install USB drivers. Drivers for Windows XP are available in the Dynamic C Drivers\Rabbit USB Programming Cable\

WinXP_2K

folder — double-click DPInst.exe to install the USB drivers. Drivers for

other operating systems are available online at www.ftdichip.com/Drivers/VCP .htm.

2.2.4 Step 4 — Connect Power

Once all the other connections have been made, you can connect power to the Prototyping Board.

If you have the universal AC adapter , prepare the AC adapter for the country where it will be used by selecting the appropriate plug. Snap in the top of the plug assembly into the slot at the top of the AC adapter as shown in Figure 4, then press down on the plug until it clicks into place.

Connect the AC adapter to 3-pin header J1 on the Prototyping Board as shown in Figure 4 above. The connector may be attached either way as long as it is not offset to one side— the center pin of J1 is always connected to the positive terminal, and either edge pin is ground.

Plug in the AC adapter. The PWR LED on the Prototyping Board next to the power connector at J1 should light up. The RCM4200 and the Prototyping Board are now ready to be used.

NOTE: A RESET button is provided on the Pro totyping Boar d next to t he batter y holder

to allow a hardware reset without disconnecting power.

To power down the Prototyping Board, unplug the power connector from J1. You should disconnect power before making any circuit adjustments in the prototyping area, changing any connections to the board, or removing the RCM4200 from the Prototyping Board.

User’s Manual 11

2.3 Run a Sample Program

Once the RCM4200 is connected as described in the preceding pages, start Dynamic C by double-clicking on the Dynamic C icon on your desktop or in your Start menu. For the

RCM4200 model, select Co de and B I OS in Fla sh , Ru n in RAM on the “C ompiler ” tab in the Dynamic C Options > Project Options menu. (Select Code and BIOS in Flash

RCM4210.) Click OK. If you are using a USB port to connect your computer to the RCM4200, click on the

“Communications” tab and verify that Use USB to Serial Converter is selected to sup- port the USB programming cable. Click OK. You may have to determine which COM port was assigned to the RS-232/USB converter. Open Control Panel > System > Hardware >

Device Mana ger > Ports

In Dynamic C, select

Communications tab, then click OK. You may type the COM port number followed by Enter on your computer keyboard if the COM port number is outside the range on the

and identify which COM port is used for the USB connection.

Options > Project Options, then select this COM port on the

dropdown menu.

for the

Now find the file gram, open it with the

PONG.C, which is in the Dynamic C SAMPLES folder. To run the pro-

File menu, compile it usin g the Compile menu, and then run it by

selecting Run in the Run menu. The STDIO window will open on your PC and will display a small square bouncing around in a box.

2.3.1 Troubleshooting

If you receive the message No Rabbit Processor Detected, the programming cable may be connected to the wrong COM port, a connection may be faulty, or the target system may not be powered up. First, check to see that the power LED on the Prototyping Board is lit. If the LED is lit, ch eck both ends of the programm ing cable to ensure tha t it is firmly plugged into the PC and the programming header on the RCM4200 wi th the marked (colored) edge of the programming cable tow ards pin 1 of the programming header . Ensure that the module is firmly and correctly installed in its connectors on the Prototyping Board.

If Dynamic C appears to compile the BIOS successfully, but you then receive a communication error message when you compile and load a sample program, it is possible that your PC cannot handle the higher program-loading baud rate. Try changing the maximum download rate to a slower baud rate as follows.

• Locate the Serial Options dialog in the Dynamic C Options > Project Options >

Communications

menu. Select a slower Max download baud rate.

If a program compiles and loads, but then loses target communication before you can begin debugging, it is possible that your PC cannot handle the default debugging baud rate. Try lowering the debugging baud rate as follows.

• Locate the Serial Options dialog in the Dynamic C Options > Project Options >

Communications

12 RabbitCore RCM4200

menu. Choose a lower debug baud rate.

If there are no faults with the hardware, check that you have selected the correct COM port within Dynamic C as explained for the USB po rt above. Press <Ctrl-Y> to force Dynamic C to recompile the BIOS. If Dynamic C still reports it is unable to locate the target system, repeat the above steps for another available COM port. You should receive a Bios

compiled successfully

message once this step is completed successfully.

2.4 Where Do I Go From Here?

If the sample program ran fine, you are now ready to go on to the sample programs in Chapter 3 and to develop your own applications. The sample programs can be easily modified for your own use. The user's manual also provides complete hardware reference information and software function calls for the RCM4200 series of modules and the Prototyping Board.

For advanced development topics, refer to the Dynamic C User’s Manual, also in the online documentation set.

2.4.1 Technical Support

NOTE: If you purchased your RCM4200 t hrough a di strib utor or thr ough a Rabbi t partn er,

contact the distrib utor or partner first for tec hnical support.

If there are any problems at this point:

• Use the Dynamic C Help menu to get further assistance with Dynamic C.

• Check the Rabbit Semiconductor Technical Bulletin Board and forums at

www.rabbit.com/support/bb/ and at www.rabbit.com/forums/.

• Use the Technical Support e-mail form at www.rabbit.com/support/.

User’s Manual 13

14 RabbitCore RCM4200

3. RUNNING SAMPLE PROGRAMS

To develop and debug programs for the RCM4 200 (and for all other Rabbit Semiconductor hardware), you must install and use Dynamic C. This chapter provides a tour of its major features with respect to the RCM4200.

3.1 Introduction

To help familiarize you with the RCM4200 modules, Dynamic C includes several sample programs. Loading, executing and studying these programs will give you a solid hands-on overview of the RCM4200’s capabilities, as well as a quick start with Dynamic C as an application development tool.

NOTE:

In order to run the sample programs discussed in this chapter and elsewhere in this manual,

1. Your module must be plugged in to the Prototyping Board as described in Chapter 2, “Getting Started.”

2. Dynamic C must be installed and running on your PC.

3. The programming cable must connect the programming header on the module to your PC.

4. Power must be applied to the module through the Prototyping Board.

Refer to Chapter 2, “Getting Started,” if you need further information on these steps. To run a sample program, open it with the

and run it by pressing F9. Each sample program has comments that describe the purpose and function of the pro-

gram. Follow the instructions at the beginning of the sample program. More complete information on Dynamic C is provided in the Dynamic C User’s Manual.

The sample progr ams assum e that you ha ve at lea st an e lemen tary gr asp of A NSI C.

If you do not, see the introductory pages of the Dynamic C User’s Manual for a sug- gested reading list.

File menu (if it is not still open), then compile

User’s Manual 15

3.2 Sample Programs

Of the many sample programs included with Dynamic C, several are specific to the RCM4200 modules. These programs will be found in the SAMPLES\RCM4200 folder.

• CONTROLLED.C—Demonstrates use of the digital outputs by having you turn LEDs

DS2 and DS3 on the Prototyping Board on or off from the STDIO window on your PC. Parallel Port B bit 2 = LED DS2

Parallel Port B bit 3 = LED DS3 Once you compile and run CONTROLLED.C, the following display will appear in the

Dynamic C STDIO window.

Press “2” or “3” on your keyboard to select LED DS2 or DS3 on the Prototyping Board. Then follow the prompt in the Dynamic C

STDIO window to turn the LED ON

or OFF. A logic low will light up the LED you selected.

• FLASHLED1.C—demonstrates the use of assembly language to flash LEDs DS2 and

DS3 on the Prototyping Board at different rates. Once you have compiled and run this program, LEDs DS2 and DS3 will flash on/off at different rates.

FLASHLED2.C—demonstrates the use of cofunctions and costatements to flash LEDs

•

DS2 and DS3 on the Prototyping Board at different rates. Once you have compiled and run this program, LEDs DS2 and DS3 will flash on/off at different rates.

16 RabbitCore RCM4200

• TAMPERDETECTION.C—demonstrates how to detect an attempt to enter the bootstrap

mode. When an attempt is detected, the battery-backed onchip-encryption RAM on the Rabbit 4000 is erased. This battery-backed onchip-encryption RAM can be useful to store data such as an AES encryption key from a remote location.

This sample program shows how to load and read the battery-backed onchip-encryption RAM and how to enable a visual indicator.

Once this sample is compiled and running (you pressed the F9 key while the sample program is open), remove the programming cable and press the reset button on the Prototyping Board to reset the module. LEDs DS2 and DS3 will be flashing on and off.

Now press switch S2 to load the battery-backed RAM with the encryption key. The LEDs are now on continuously. Notice that the LEDs will stay on even when you press the reset button on the Prototyping Board.

Reconnect the programming cable briefly and unplug it again to simulate an attempt to access the onchip-encryption RAM. The LEDs will be flashing because the batterybacked onchip-encryption RAM has been erased. Notice that the LEDs will continue flashing even when you press the reset button on the Prototyping Board.

You may press switch S2 again and repeat the last steps to watch the LEDs.

• TOGGLESWITCH.C—demonstrates the use of costatements to detect switch presses

using the press-and-release method of debouncing. LEDs DS2 and DS3 on the Prototyping Board are turned on and off when you press switches S2 and S3. S2 and S3 are controlled by PB4 and PB5 respectively.

Once you have loaded and executed these five programs and have an understanding of how Dynamic C and the RCM4200 modules interact, you can move on and try the other sample programs, or begin building your own.

User’s Manual 17

3.2.1 Use of Serial Flash

The following sample programs can be found in the SAMPLES\RCM4200\Serial_Flash folder.

• SERIAL_FLASHLOG.C—This program runs a simple Web server and stores a log of

hits on the home page of the serial flash “server.” This log can be viewed and cleared from a browser at http://10.10.6.100/. You will likely have to first “configure” your network interface card for a “10Base-T Half-Duplex,” “100Base-T Half-Duplex,” or an “Auto-Negotiation” connection on the “Advanced” tab, which is accessed from the control panel (

Connections

Start > Settings > Control Panel) by choosing Network

• SFLASH_INSPECT.C—This program is a handy utility for inspecting t he contents of a

serial flash chip. When the sample program starts running, it attempts to initialize a serial flash chip on Serial Port C. Once a serial flash chip is found, the user can perform five different commands to print out the contents of a specified page, set all bytes on the specified page to a single random value, clear (set to zero) all the bytes in a specified page, set all bytes on the specified page to a given value, or save user-specified text to a selected page.

18 RabbitCore RCM4200

3.2.2 Serial Co mmunication

The following sample programs are found in the SAMPLES\RCM4200\SERIAL folder.

•

FLOWCONTROL.C—This program demonstrates how to configure Serial Port D for

CTS/R TS flow control with serial data coming from Serial Port C (TxC) at 1 15,20 0 bps. The serial data received are displayed in the

STDIO window.

To set up the Prototyping Board, you will need to tie TxD and RxD together on the RS-232 header at J4, and you will also tie TxC and RxC together using the jumpers supplied in the Development Kit as

RxC TxC

TxD RxD

GND

shown in the diagram. A repeating triangular pattern should print out in the STDIO window.

The program will periodically switch flow contr ol on or off to demonstrate the ef fect of flow control.

PARITY.C—This program demonstrates the use of parity modes by

•

RxC

TxD

TxC

RxD GND

repeatedly sending byte values 0–127 from Serial Port C to Serial Port D. The program will switch between generating parity or not on Serial Port C. Serial Port D will always be checking parity, so parity errors should occur during every other sequence.

To set up the Prototyping Board, you will need to tie TxC and RxD together on the RS-232 header at J4 using one of the jumpers supplied in the Development Kit as shown in the diagram.

The Dynamic C STDIO window will display the error sequence.

SERDMA.C—This program demonstrates using DMA to transfer data from a circ ular

•

buffer to the serial port and vice versa. The Dynamic C

STDIO window is used to view o r

clear the buffer.

Before you compile and run the sample program, you will need to connect the RS-232 he ader a t J4 to y our PC as shown in the diagram using the serial to DB9 cable supplied in the Development Kit.

Colored

edge

Once you have compiled and run the sample program, start Tera Term or another terminal emulation program to connect to the selected PC serial port at a baud rate of

115,200 bps. You can observe the output in the Dynamic C

STDIO window as you type in T e ra Term, and you can

also use the Dynamic C STDIO window to clear the

buffer.

The Tera Term utility can be downloaded from

hp.vector.co.jp/authors/VA002416/teraterm.html.

RxC

TxD

TxC

RxD

GND

User’s Manual 19

• SIMPLE3WIRE.C—This program demonstrates basic RS-232 serial communication. Lower case characters are sent on TxC, and are received by RxD. The received characters are converted to upper case and are sent out on TxD, are received on RxC, and are displayed in the

RxC TxC

TxD RxD

GND

Dynamic C STDIO window. To set up the Prototyping Board, you will need to tie TxD and RxC together on the

RS-232 header at J4, and you will also tie RxD and TxC together using the jumpers supplied in the Development Kit as shown in the diagram.

• SIMPLE5WIRE.C—This program demonstrates 5-wire RS-232 serial communication with flow control on Serial Port D and data flow on Serial Port C.

To set up the Prototyping Board, you will need to tie TxD and RxD together on the RS-232 header at J4, and you will also tie TxC and RxC together using the jumpers supplied in the Development Kit as

RxC TxC

TxD RxD

GND

shown in the diagram. Once you have compiled and run this program, you can test flow con-

trol by disconnecting the TxD jumper from RxD while the program is running. Characters will no longer appear in the STDIO window, and will display again once TxD is connected back to RxD.

If you have two Prototyping Boards with modules, run this sample program on the sending board, then disconnect the programming cable and reset the sending board so that the module is operating in the Run mode. Connect TxC, TxD, and GND on the sending board to RxC, RxD, and GND on the other board, then, with the programming cable attached to the other module, run the sample program. Once you have compiled and run this program, you can test flow control by disconnecting TxD from RxD as before while the program is running. Since the J4 header locations on the two Prototyping Boards are connected with wires, there are no slip-on jumpers at J4 on either Prototyping Board.

SWITCHCHAR.C—This program demonstrates transmitting and then receiving an

•

ASCII string on Serial Ports C and D. It also displays the serial data received from both ports in the

STDIO window.

To set up the Prototyping Board, you will need to tie TxD and RxC together on the RS-232 header at J4, and you will also tie RxD and TxC together using the jumpers supplied in the Development Kit as shown in the diagram.

RxC TxC

TxD RxD

GND

Once you have compiled and run this program, press and release switches S2 and S3 on the Prototyping Board. The data sent between the serial ports will be displayed in the STDIO window.

20 RabbitCore RCM4200

• IOCONFIG_SWITCHECHO.C—This program demonstrates how to set up Serial Port E,

which then transmits and then receives an ASCII string when switch S2 is pressed. The echoed serial data are displayed in the Dynamic C

STDIO window.

Note that the I/O lines that carry the Serial Port E signals are not the Rabbit 4000 defaults. The Serial Port E I/O lines are configured by calling the library function

serEconfig() that was generated by the Rabbit 4000 IOCONFIG.EXE utility pro-

gram. Serial Port E is configured to use Parallel Port E bi ts PD6 and PD7. These si gnals are available on the Prototyping Board's Module Extension Header (header J2).

Serial Port D is left in its default configuration, using Parallel Port C bits PC0 and PC1. These signals are available on the Prototyping Board's RS-232 connector (header J4). Serial Port D transmits and then receives an ASCII string when switch S3 is pressed.

Also note that there is one library generated by

IOCONFIG.EXE in the Dynamic C

SAMPLES\RCM4200\SERIAL folder for the 29 MHz RCM4210.

T o set up the Prototypi ng Board, you will need to tie TxD and RxD together on the RS-232 header at J4 using the jumpers supplied in the Development Kit; you will also tie TxE (PD6) and RxE (PD7) together with a soldered wire or with a wire jumper if you have soldered in the IDC header supplied with the accessory parts in the Development Kit.

+3.3 V

/RST_OUT

PE5 PE7

PD1/LN1

PD3/LN3 PD5/LN5 PD7/LN7

VREF

GND /IORD

PE6

PD0/LN0 PD2/LN2 PD4/LN4 PD6/LN6 CVT AGND

TxD

RxD

GND

RxC

TxC

Once you have compiled and run this program, press and release switches S2 or S3 on the Prototyping Board. The data echoed between the serial ports will be displayed in the STDIO window.

User’s Manual 21

3.2.3 A/D Converter Inputs (RCM4200 only)

The following sample programs are found in the SAMPLES\RCM4200\ADC folder.

• AD_CAL_ALL.C—Demonstrates how to recalibrate all the single-ended analog input

channels with one gain using two known voltages to generate the calibration constants for each channel. The constants will be written into the user block data area.

Connect a positive voltage from 0–20 V DC (for example, the power supply positive output) to analog input channels LN0IN–LN6IN on the Prototyping Board, and connect the ground to GND. Use a voltmeter to measure the voltage, and follow the instructions in the Dynamic C

STDIO window once you compile and run this sample program. Remember

that analog input LN7 on the Prototyping Board is used with the thermistor and is not be used with this sample program.

NOTE: The above sample program will overwrite the existing calibration constants.

• AD_CAL_CHAN.C—Demonstrates how to recalibrate one single-ended analog input

channel with one gain using two known voltages to generate the calibration constants for that channel. The constants will be rewritten into the user block data area.

Connect a positive voltage from 0–20 V DC (for example, the power supply positive output) to an analog input channe l on the Prototyping Board, and conne ct the ground to GND. Use a voltmeter to measure the voltage , and follow the instruct ions in the Dynamic C

STDIO

window once you compile and run this sample program. Remember that analog input LN7 on the Prototyping Board is used with the thermistor and is not be used with this sample program.

NOTE: The above sample program will overwrite the existing calibration constants for

the selected channel.

• AD_RDVOLT_ALL.C—Demonstrates how to read all single-ended A/D input channels

using previously defined calibration constants. The constants used to compute equivalent voltages are read from the user bl ock dat a a rea , so t he sa mple pr ogram c annot be run u si ng the “Code and BIOS in RAM” compiler option.

Compile and run this sample program once you have connected a positive voltage from 0– 20 V DC (for example, the power supply positive output) to ana log input channels LN0IN– LN6IN on the Prototyping Board, and ground to GND. Follow the prompts in the Dynamic C

STDIO window. Raw data and the computed equivalent voltages will be displayed.

Remember that analog input LN7 on the Prototyping Boar d is used with the the rmistor and is not be used with this sample program.

• AD_SAMPLE.C—Demonstrates how to how to use a low level driver on single-ended

inputs. The program will continuously display the voltage (averaged over 10 samples) that is present on an A/D converter channel (except LN7). The constants used to compute equivalent voltages are read from the user block data are a, so the sample program cannot be run using the “Code and BIOS in RAM” compiler option.

Compile and run this sample program once you have connected a positive voltage from 0– 20 V DC to an analog input (except LN7) on the Prototyping Board, and ground to GND. Follow the prompts in the Dynamic C

STDIO window. Raw data and the computed equiv-

alent voltages will be displayed. If you attach a voltmeter between the analog input and ground, you will be able to observe that the voltage in the Dynamic C

STDIO window

tracks the voltage applied to the analog input as you vary it.

22 RabbitCore RCM4200

• THERMISTOR.C— Demonstrates how to use analog input LN7 to calculate temperature for display to the Dynamic C STDIO window. This sample program assumes that the thermistor is the one included in the Development Kit whose values for beta, series resistance, and resistance at standard temperature are given in the part specification.

Install the thermistor at location JP25 on the Prototyping Board before running this sample program. Observe the temperature changes shown in the Dynamic C

STDIO

window as you apply heat or cold air to the thermistor.

3.2.3.1 Downloading and Uploading Calibration Constan ts

The Tera Term utility called for in these sample programs can be downloaded from

hp.vector.co.jp/authors/VA002416/teraterm.html.

These sample programs must be compiled to flash memory. To do so, select Options >

Project Options

BIOS in Flash” for the

in Dynamic C, then select the “Compiler” tab, and select “Code and

BIOS Memory Setting.

Before you compile and run these sample programs, you will also need to connect the RS-232 header at J4 to your PC as shown in the diagram using the serial to DB9 cable supplied in the Development Kit.

•

DNLOADCALIB.C—Demonstrates how to retrieve

Colored

edge

analog calibration data to rewrite it back to the user block using a terminal emulation utility such as Tera Term.

RxC

TxC

Start T era Term or another terminal emulation program on your PC, and configure the serial parameters as

TxD

RxD

GND

follows.

• Baud rate 19,200 bps, 8 bits, no parity, 1 stop bit

• Enable Local Echo opt io n

• Feed options — Receive = CR, Transmit = CR + LF

Now compile and run this sample program. Verify that the message “Waiting, Please Send Data file” message is being display in the Tera Term display window before proceeding.

Within Tera Term, select

OPEN option within the dialog box. Once the data file has been downloaded, Tera

File-->Send File-->Path and filename, then select the

Term will indicate whether the calibration data were written successfully.

• UPLOADCALIB.C—Demonstrates how to read the analog calibration constants from the user block using a terminal emulation utility such as Tera Term.

Start Tera Term or another terminal emulation program on your PC, and configure the serial parameters as follows.

User’s Manual 23

• Baud rate 19,200 bps, 8 bits, no parity, 1 stop bit

• Enable Local Echo opt io n

• Feed options — Receive = CR, Transmit = CR + LF

Follow the remaining steps carefully in Tera Term to avoid overwriting previously saved calibration data when using same the file name.

• Enable the File APPEND option at the bottom of the dialog box

• Select the OPEN option at the right-hand side of the dialog box

T era Term is now ready to log all data received on the serial port to the file you specified. Y ou are now ready to compile and run this sample program. A message will be displayed

in the Tera Term display window once the sample program is running. Enter the serial number you assigned to your RabbitCore module in the Tera Term

display window, then press the ENTER key. The Tera Term display window will now display the calibration data.

Now select

CLOSE from within the Tera Term LOG window, which will likely be a

separate pop-up window minimized at the bottom of your PC screen. This finishes the logging and closes the file.

Open your data file and verify that the calibration data have been written properly. A sample is shown below.

Serial port transmission ========================

Uploading calibration table . . .

Enter the serial number of your controller = 9MN234

SN9MN234

ADSE

0 float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,float_gain,float_offset, float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,float_gain,float_offset, 1 float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,float_gain,float_offset, float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,float_gain,float_offset, | |

ADDF

0 float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,float_gain,float_offset, float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,float_gain,float_offset, 2 float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,float_gain,float_offset, float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,float_gain,float_offset, | |

ADMA

3 float_gain,float_offset, 4 float_gain,float_offset, | |

END

24 RabbitCore RCM4200

3.2.4 Real-Time Clock

If you plan to use the real-time clock functionality in your application, you will need to set the real-time clock. Set the real-time clock using the SETRTCKB.C sample program from the Dynamic C SAMPLES\RTCLOCK folder, using the onscreen prompts. The

RTC_TEST.C sample program in the Dynamic C SAMPLES\RTCLOCK folder provides

additional examples of how to read and set the real-time clock.

User’s Manual 25

26 RabbitCore RCM4200

4. HARDWARE REFERENCE

Chapter 4 describes the hardware components and principal hardware subsystems of the RCM42 00. Appendix A, “RC M4200 Specific ations,” provides complete physical and electrical specifications.

Figure 5 shows the Rabbit-based subsystems designed into the RCM4200.

Ethernet

SRAM

Fast

SRAM

Program

Flash

Serial

Flash

32 kHz

RABBIT

A/D Converter

osc

58.98 MHz osc

4000

RabbitCore Module

Figure 5. RCM4200 Subsystems

Customer-specific

applications

CMOS-level signals

Level

converter

RS-232, RS-485

serial communication

drivers on motherboard

User’s Manual 27

4.1 RCM4200 Digital Inputs and Outputs

Figure 6 shows the RCM4200 pinouts for header J2.

+3.3 V_IN

/RESET_OUT

/IOWR

VBAT_EXT

PA1 PA3 PA5 PA7

PB1_SCLKA

PB3 PB5 PB7 PC1

PC3_RxC

PC5_RxB PC7_RxA

PE1 PE3

PE5/SMODE0

PE7/STATUS

PD1/LN1 PD3/LN3 PD5/LN5 PD7/LN7

VREF

n.c. = not connected

These pinouts are as seen on

Note:

the Bottom Side of the module.

GND /IORD /RESET_IN PA0 PA2 PA4 PA6 PB0_SCLKB PB2 PB4 PB6 PC0 PC2_TxC PC4_TxB PC6_TxA PE0 PE2_ENET_EN PE4 PE6/SMODE1 PD0/LN0 PD2/LN2 PD4/LN4 PD6/LN6 CONVERT GND

Figure 6. RCM4200 Pinout

Headers J2 is a standard 2 × 25 IDC header with a nominal 1.27 mm pitch.

28 RabbitCore RCM4200

Figure 7 shows the use of the Rabbit 4000 m icroprocessor ports in the RC M4200 mo dules.

PC0, PC2

PC1, PC3

PB1, PC6, STATUS

PC7, /RES,

SMODE0, SMODE1

PC4

PC5

PA0PA7

Port A

Port C

(Serial Ports C & D)

Serial Ports E & F

(RCM4210 only)

Programming

Port

(Serial Port A)

A/D Converter (Serial Port B)

RAM

PB2PB7

Port B

ABBIT

4000

Real-Time Clock

Watchdog

11 Timers

Slave Port

Clock Doubler

Backup Battery

Support

PD0PD7

Port D

(RCM4210 only)

Port E

Misc. I/O

Flash

PE0PE7

/RES_IN

/RESET_OUT /IORD /IOWR

Figure 7. Use of Rabbit 4000 Ports

The ports on the Rabbit 4000 microprocessor used in the RCM4200 are configurable, and so the factory defaults can be reconfigured. Table 2 lists the Rabbit 4000 factory defaults and the alternate configurations.

User’s Manual 29

Table 2. RCM4200 Pinout Configurations

Pin Pin Name Default Use Alternate Use Notes

1 +3.3 V_IN 2GND

Reset output from Reset

3 /RES_OUT Reset output Reset input

4 /IORD Output External I/O read strobe 5 /IOWR Output External I/O wri te st r obe 6 /RESET_IN Input Input to Reset Generator 7 VBAT_EXT Battery input

Slave port data bus

8–15 PA[0:7] Input/Output

(SD0–SD7)

External I/O data bus

(ID0–ID7)

Generator or external reset input

16 PB0 Input/Output

17 PB1 Input/Output

18 PB2 Input/Output

19 PB3 Input/Output

20 PB4 Input/Output

21 PB5 Input/Output

22 PB6 Input/Output

23 PB7 Input/Output

SCLKB External I/O Address IA6

SCLKA External I/O Address IA7

/SWR External I/O Address IA0

/SRD External I/O Address IA1

SA0 External I/O Address IA2

SA1 External I/O Address IA3

/SCS External I/O Address IA4

/SLAVATN External I/O Address IA5

SCLKB (used by RCM4200 A/D converter — see Section 4.2.1)

Programming port CLKA

30 RabbitCore RCM4200

Table 2. RCM4200 Pinout Configurations (c ontinued)

Pin Pin Name Default Use Alternate Use Notes

TXD

24 PC0 Input/Output

I/O Strobe I0 Timer C0 TCLKF

25 PC1 Input/Output

26 PC2 Input/Output

27 PC3 Input/Output

28 PC4 Input/Output

29 PC5 Input/Output

RXD/TXD I/O Strobe I1 Timer C1 RCLKF Input Capture

TXC/TXF I/O Strobe I2 Timer C2

RXC/TXC/RXF I/O Strobe I3 Timer C3 SCLKD Input Capture

TXB I/O Strobe I4 PWM0 TCLKE

RXB/TXB I/O Strobe I5 PWM1 RCLKE Input Capture

Serial Port D

Serial Po rt C (shared by serial flash)

Serial Po rt B (shared by RCM4200 A/D converter)

TXA/TXE

30 PC6 Input/Output

I/O Strobe I6 PWM2

RXA/TXA/RXE

Programming port

I/O Strobe I7

31 PC7 Input/Output

PWM3 SCLKC Input Capture

I/O Strobe I0 A20

32 PE0 Input/Output

Timer C0 TCLKF INT0 QRD1B

User’s Manual 31

Table 2. RCM4200 Pinout Configurations (c ontinued)

Pin Pin Name Default Use Alternate Use Notes

I/O Strobe I1 A21 Timer C1

33 PE1 Input/Output

34 PE2 Input/Output

35 PE3 Input/Output

RXD/RCLKF INT1 QRD1A Input Capture

I/O Strobe I2 A22 Timer C2 TXF DREQ0 QRD2B

I/O Strobe I3 A23 Timer C3 RXC/RXF/SCLKD DREQ1 QRD2A Input Capture

Ethernet enable

36 PE4 Input/Output

37 PE5/SMODE0 Input/Output

38 PE6/SMODE1 Input/Output

39 PE7/STATUS Input/Output

I/O Strobe I4 /A0 INT0 PWM0 TCLKE

I/O Strobe I5 INT1 PWM1 RXB/RCLKE Input Capture

I/O Strobe I6 PWM2 TXE DREQ0

I/O Strobe I7 PWM3 RXA/RXE/SCLKC DREQ1 Input Capture

PE5 is the default configuration

PE6 is the default configuration

PE7 (SCLKC) is the default configuration

32 RabbitCore RCM4200

Table 2. RCM4200 Pinout Configurations (c ontinued)

Pin Pin Name Default Use Alternate Use Notes

40–47 LN[0:7] Analog Input

40 PD0 Input/Output

41 PD1 Input/Output

42 PD2 Input/Output

I/O Strobe I0 Timer C0 D8 INT0 SCLKD/TCLKF QRD1B

IA6 I/O Strobe I1 Timer C1 D9 INT1 RXD/RCLKF QRD1A Input Capture

I/O Strobe I2 Timer C2 D10 DREQ0 TXF/SCLKC QRD2B

A/D converter (RCM4200 only)

RCM4210 only

SCLKC (see Section 4.2.1)

43 PD3 Input/Output

44 PD4 Input/Output

45 PD5 Input/Output

IA7 I/O Strobe I3 Timer C3 D11 DREQ1 RXC/RXF QRD2A Input Capture

I/O Strobe I4 D12 PWM0 TXB/TCLKE

IA6 I/O Strobe I5 D13 PWM1 RXB/RCLKE Input Capture

RCM4210 only

User’s Manual 33

Table 2. RCM4200 Pinout Configurations (c ontinued)

Pin Pin Name Default Use Alternate Use Notes

I/O Strobe I6

46 PD6 Input/Output

D14 PWM2 TXA/TXE

IA7 I/O Strobe I7

47 PD7 Input/Output

48 CONVERT Digital Input

49 VREF

50 GND Ground Analog ground

Analog reference voltage

D15 PWM3 RXA/RXE Input Capture

Serial Port E (RCM4210 only)

A/D converter (RCM4200 only)

1.15 V/2.048 V/2.500 V on-chip ref. voltage (RCM4200 only)

4.1.1 Memory I/O Interface

The Rabbit 4000 address lines (A0–A19) and all the data lines (D0–D7) are routed internally to the onboard flash memory and SRAM chips. I/0 write (/IOWR) and I/0 read (/IORD) are available for interfacing to external devices, and are also used by the RCM4200.

Parallel Port A can also be used as an external I/O data bus to isolate external I/O from the main data bus. Parallel Port B pins PB2–PB7 can also be used as an auxiliary address bus.

When using the auxiliary I/O bus for any reason, you must add the following line at the beginning of your program.

#define PORTA_AUX_IO // required to enable auxiliary I/O bus

Selected pins on Parallel Ports D and E as specified in Table 2 may be used for input capture, quadrature decoder, DMA, and pulse-width modulator purposes.

4.1.2 Other Inputs and Outputs

The PE5–PE7 pins can be brought out to header J2 instead of the STATUS and the two SMODE pins, SMODE0 and SMODE1, as explained in Appendix A.6.

/RESET_IN is normally associated with the programming port, but may be used as an external input to reset the Rabbit 4000 microprocessor and the RCM4200 memory. /RESET_OUT is an output from the reset circuitry that can be used to reset other peripheral devices.

34 RabbitCore RCM4200

4.2 Serial Communication

The RCM4200 module does not have any serial driver or receiver chips directly on the board. However, a serial interface may be incorporated on the board the RCM4200 is mounted on. For example, the Prototyping Board has an RS-232 transceiver chip.

4.2.1 Serial Ports

There are five serial ports designated as Serial Ports A, B, C, D, and E. All five serial ports can operate in an asynchronous mode up to the baud rate of the system clock divided by 8. An asynchronous port can handle 7 or 8 data bits. A 9th bit address scheme, where an additional bit is sent to mark the first byte of a message, is also supported.

Serial Port A is normally used as a programming port, but may be used either as an asynchronous or as a clocked serial port once application development has been completed and the RCM4200 is operating in the Run Mode.

Serial Port B is shared by the RCM4200 module’s A/D converter, and is set up as a clocked serial port. Since this serial port is set up for synchronous serial communication on the RCM4200 model, you will lose the A/D converter’s functionality if you try to use the serial port in the asynchronous mode. Serial Port B is available without any restrictions on the RCM4210.

Serial Port C is shared with the serial flash, and is set up as a clocked serial port. PE7 is set up to provide the SCLKC output to the serial flash, but PD2 also provides the SCLKC ouput automatically when Serial Port C is used as a clocked serial port. Since this serial port is available for synchronous serial communication on either RCM4200 model, you will lose the serial flash’s funct ionality if you try to use the serial port in the asynchronous mode.

NOTE: Since Serial Port C is shared with the serial flash, exercise care if you attempt to

use Serial Port C for ot her serial communication. Your application will hav e t o manag e the sharing negotiations to avoid conflicts when reading or writing to the serial flash.

Serial Port D may also be used as a clocked serial port. Note that PD0 provides the SCLKD ouput automatically when Serial Port D is set up as a clocked serial port.

Serial Port E, which is available only on the RCM4210, can also be configured as an SDLC/HDLC serial port. The IrDA protocol is also supported in SDLC format by Serial Port E. Serial Port E must be configured before it can be used. The sample program

IOCONFIG_SWITCHECHO.C in the Dynamic C SAMPLES\RCM4200\SERIAL folder

shows how to configure Serial Port E.

User’s Manual 35

Table 3 summarizes the possible parallel port pins for the serial ports and their clocks.

Table 3. Rabbit 4000 Serial Port and Clock Pins

Serial Port A (programming port)

Serial Port B (used by A/D converter on RCM4200)

Serial Port C (shared by serial flash)

TXA PC6, PC7, PD6 RXA PC7, PD7, PE7 RXD PC1, PD1, PE1

SCLKA PB1 SCLKD PD0, PE0, PE3, PC3

TXB PC4, PC5, PD4 RXB PC5, PD5, PE5 RXE PD7, PC7, PE7

SCLKB PB0 RCLKE PD5, PC5, PE5

TXC PC2, PC3 TCLKE PD4, PC4, PE4 RXC PC3, PD3, PE3

SCLKC PD2, PE2, PE7, PC7

Serial Port D

Serial Port E (RCM4210 only)

RCLKE must be selected to be on the same parallel port as TXE.

TXD PC0, PC1

TXE PD6, PC6, PE6

4.2.1.1 Using the Serial Ports

The receive lines on the RCM4200 serial ports do not have pull-up resistors. If you are using the serial ports without a receiver chip (for example, for RS-422, RS-232, or RS-485 serial communication), the absence of a pull-up resistor on the receive line will likely lead to line breaks being generated since line breaks are normally generated whenever the receive line is pulled low. If you are operating a serial port asynchronously , you can inhibit character assembly during breaks by setting bit 1 in the corresponding Serial Port Extended Register to 1. Should you need line breaks, you will have to either add a pull-up resistor on your motherboard or use a receiver that incorporates the circuits to have the output default to the nonbreak levels.

The Dynamic C RS232.LIB library requires you to define the macro RS232_

NOCHARASSYINBRK

#define RS232_NOCHARASSYINBRK

to inhibit break-character assembly for all the serial ports.

This macro is already defined so that it is the default behavior for the sample programs in the Dynamic C SAMPLES\RCM4200\SERIAL folder.

36 RabbitCore RCM4200

4.2.2 Ethernet Port

Figure 8 shows the pinout for the RJ-45 Ethernet port (J3). Note that some Ethernet connectors are numbered in reverse to the order used here.

ETHERNET

RJ-45 Plug

RJ-45 Jack

1. E_Tx+

2. E_Tx

3. E_Rx+

6. E_Rx

Figure 8. RJ-45 Ethernet Port Pinout

Three LEDs are placed next to the RJ-45 Ethernet jack, one to indicate Ethernet link/activity (LINK/ACT), one to indicate when the RCM4200 is connected to a functioning 100B ase-T network (

SPEED), and one (FDX/COL) to indicate that the current connection is in full-

duplex mode (steady on) or that a half-duplex connection is experiencing collisions (blinks).

The RJ-45 connector is shielded to minimize EMI effects to/from the Ethernet signals.

User’s Manual 37

4.2.3 Programming Port

The RCM4200 is programmed via the 10-pin header labeled J1. The programming port uses the Rabbit 4000’ s Serial Port A for commun ication. Dynamic C uses the programming port to download and debug programs.

Serial Port A is also used for the following operations.

• Cold-boot the Rabbit 4000 on the RCM4200 after a reset.

• Fast copy designated portions of flash memory from one Rabbit-based board (the

master) to another (the slave) using the Rabbit Cloning Board.

Alternate Uses of the Programming Port

All three Serial Port A signals are available as

• a synchronous serial port

• an asynchronous serial port, with the clock line usable as a general CMOS I/O pin

The programming port may also be used as a serial port via the DIAG connector on the programming cable.

In addition to Serial Port A, the Rabbit 4000 startup-mode (SMODE0, SMODE1), STATUS, and reset pins are available on the programming port.

The two startup-mode pins determine what happens after a reset—the Rabbit 4000 is either cold-booted or the program begins executing at address 0x0000.

The status pin is used by Dynamic C to determine whether a Rabbit microprocessor is present. The status output has three different programmable functions:

1. It can be driven low on the first op code fetch cycle.

2. It can be driven low during an interrupt acknowledge cycle.

3. It can also serve as a general-purpose output once a program has been downloaded and is running.

The reset pin is an external input that is used to reset the Rabbit 4000. Refer to the

Rabbit 4000 Microprocessor User’s Manual for more information.

38 RabbitCore RCM4200

4.3 Programming Cable

The programming cable is used to connect the programming port of the RCM4200 to a PC serial COM port. The programming cable converts the RS-232 voltage levels used by the PC serial port to the CMOS voltage levels used by the Rabbit 4000.

When the port on the RCM4200, programs can be downloaded and debugged over the serial interface.

The DIAG connecto r of the pr o g r am ming cab l e m a y b e u s ed o n h e a d er J 1 o f th e RCM4200 with the RCM4200 operating in the Run Mode. This allows the programming port to be used as a regular serial port.

4.3.1 Changing Between Program Mode and Run Mode

PROG connector on the programming cable is connected to the programming

The RCM4200 is automatically in Program Mode when the

PROG connector on the pro-

gramming cable is attached, and is automatically in Run Mode when no programming cable is attached. When the Rabbit 4000 is reset, the operating mode is determined by the status of the SMODE pins. When the programming cable’s

PROG connector is attached,

the SMODE pins are pulled high, placing the Rabbit 4000 in the Program Mode. When the programming cable’s PROG connector is not attached, the SMODE pins are pulled low, causing the Rabbit 4000 to operate in the Run Mode.

RESET RCM4200 when changing mode:

Press RESET button (if using Prototyping Board),

Cycle power off/on

after removing or attaching programming cable.

3-pin

power connector

Programming

Cable

or USB port

PC COM port

PROG

Colored

edge

PWR

DS1

GND

DS1

C24

LINK

JP16

R47

FDX

R49

R13

R14

DS3

R12

DS2

R48

C25

R52

SPEED

C31

C33

C32

C34

C30

C35

C36

C37

C38

R19

C28 C29

C19

R50

C26

C18

C20

RX43

RX47

R18

R21

RX97

R10

C21

C27

R15

C23

R23

R22

R16

GND

DIAG

C58

C67

C88

C81

C57

R34

U13

C18

R35

R33

R32

C65

C72

C87

C19 C20

C77

C15

R36

C85

R29

C10

C11

C12

JP8

C13 C14

C39

RX55

RX49

C15

R27

UX33UX31

R11

RX89

UX3

JP1

C17

C78

U15

JP2

/RST_OUT

C43

RCM1

/IOWR

PROG

VBAT

EXT

C82

PA1

PA3

R31

R20

JP16

R51

JP6

PA5

JP5

C76

JP12

PA7

JP4 JP3

JP14

PB1

JP8

C16

JP7

PB3

R41

R40

JP18

C75

JP9

JP10

PB5

JP11

PB7

JP10

R25

JP12

PC1

JP1

R26

JP14

U14

R20

R10

JP24

UX41

UX37 UX42

JP15

JP13

C74

JP23

RX57

JP11

JP15

JP19

C17

C16

R18

R16

R8R6R4R3R5

C86

C14

C12

C10

RX59

R44 R39 R42

PC3

JP2

PC5

JP9

JP6

PC7

JP7

JP21

JP22

JP20

JP17

PE1

JP3

JP13

PE3

JP5

R19

JP4

R14

R13

R15

R17

PE5

PE7

PD1 LN1

C8C7C9

C11

C13

PD3 LN3

PD5 LN5

PD7 LN7

R46

VREF

R45

RX61

R43

RX65

RX63

UX47

+3.3 V

+5 V

GND

/IORD

+3.3 V

/RST_IN

PA0

PA2

PA4

PA6

PB0

PB2

PB4

PB6

PC0

PC2

PC4

PC6

PE0

PE2

PE4

PE6

PD0 LN0

PD2 LN2

PD4 LN4

PD6 LN6

CVT

AGND

VREF

LN7IN

LN5IN

LN3IN

LN1IN

CVT

AGND

LN6IN

LN4IN

LN2IN

RESET

BT1

RESET

UX49

UX4

RXD TXD

TXC RXC

GND

RX81

RX83

RX11

RX67

RX75

CX25

DS2

JP25

AGND

R12

R11

LN0IN

RX85

CX27

RX73

RX77

RX79

CX23

DS3

R21

R22

R24

R23

R27

R28

GND

S3S2

UX29

RX87

CX41

CX39

UX30

UX45

UX10

CX17

UX12

UX14

CX29

UX16

GND

Figure 9. Switching Between Program Mode and Run Mode

User’s Manual 39

A program “runs” in either mode, but can only be downloaded and debugged when the RCM4200 is in the Program Mode.

Refer to the

Rabbit 4000 Microprocessor User’s Manual for more information on the pro-

gramming port.

4.3.2 Standalone Operation of the RCM4200

Once the RCM4200 has been programmed successfully, remove the programming cable from the programming connector and reset the RCM4200. The RCM4200 may be reset by cycling, the power off/on or by pressing the

RESET button on the Prototyping Board. The

RCM4200 module may now be removed from the Prototyping Board for end-use installation.

CAUTION: Power to the Prototyping Board or other boards should be disconnected

when removing or installing your RCM4200 module to protect against inadvertent shorts across the pins or damage to the RCM4200 if the pins are not plugged in correctly. Do not reapply power until you have verified that the RCM4200 module is plugged in correctly.

40 RabbitCore RCM4200

4.4 A/D Converter (RCM4200 only)

The RCM4200 has an onboard ADS7870 A/D converter whose scaling and filtering are done via the motherboard on which the RCM4200 module is mounted. The A/D converter multiplexes converted signals from eight single-ended or four differential inputs to Serial Port B on the Rabbit 4000.

The eight analog input pins, LN0–LN7, each have an input impedance of 6–7 MΩ, depending on whether they are used as single-ended or differential inputs. The input signal can range from -2 V to +2 V (differential mode) or from 0 V to +2 V (single-ended mode).

Use a resistor divider such as the one shown in Figure 10 to measure voltages above 2 V on the analog inputs.

LN0

LN1

AGND

Figure 10. Resistor Divider Network for Analog Inputs

ADC

(RCM4200)

ADC

BVREF

The R1 resistors are typically 20 kΩ to 100 kΩ, with a lower resistance leading to more accuracy, but at the expense of a higher current draw. The R0 resistors would then be 180 kΩ to 900 kΩ for a 10:1 attenuator. The capacitor filters noise pulses on the A/D converter input.

The actual voltage range for a signal going to the A/D converter input is also affected by the 1, 2, 4, 5, 8, 10, 16, and 20 V/V software-programmable gains available on each channel of the ADS7870 A/D converter. Thus, you mus t scale the analog signal with an attenuator circuit and a software-programmable gain so that the actual input presented to the A/D converter is within the range limits of the ADS7870 A/D converter chip (-2 V to + 2 V or 0 V to + 2 V).

The A/D converter chip can only accept positive voltages. Wit h the R1 resistors connected to ground, your analog circuit is well-suited to perform positive A/D conversions. When the R1 resistors are tied to ground for differential measurements, both differential inputs must be referenced to analog ground, and both inputs must be positive with respect to analog ground.

User’s Manual 41

If a device such as a battery is connected across two channels for a differential measurement, and it is not referenced to analog ground, then the current from the device will flow through both sets of attenuator resistors without flowing back

Device

AIN0

AIN1

2.2 nF



LN0

LN1

ADC

to analog ground as shown in Figure 11. This will generate a negative voltage at one of the inputs, LN1, which will almost

Figure 11. Current Flow from Ungrounded

or Floating Source

certainly lead to inaccurate A/D conversions. T o make such diff erential measurements, connect the R1 resistors to the A/D converter’s internal reference voltage, which is software-configurable for 1.15 V, 2.048 V, or 2.5 V. This internal reference voltage is available on pin 49 of header J2 as VREF, and allows you to convert analog input voltages that are negative with respect to analog ground.

NOTE: The amplifier inside the A/D converter’s internal voltage reference circuit has a

very limited output-current capability. The internal buffer can source up to 20 mA and sink only up to 200 µA. Use a separate buffer amplifier if you need to supply any load current.

The A/D converter’s CONVER T pin is available on pin 48 of header J2 and can be used as a hardware means of forcing the A/D converter to start a conversion cycle at a specific time. The CONVERT signal is an edge-triggered event and has a hold time of two CCLK periods for debounce.

A conversion is started by an active (rising) edge on the CONVERT pin. The CONVERT pin must stay low for at least two CCLK periods before going high for at least two CCLK periods. Figure 12 shows the timing of a conversion start. The double falling arrow on CCLK indicates the actual start of the conversion cycle.

Conversion starts

CCLK

BUSY

CONV

Figure 12. Timing Diagram for Conversion Start Using CONVERT Pin

Appendix B explains the implementation examples of these features on the Prototyping Board.

42 RabbitCore RCM4200

4.4.1 A/D Converter Power Supply

The analog section is isolated from digital noise generated by other components by way of a low-pass filter composed of C1, L1, and C86 on the RCM4200 as shown in Figure 13. The +V analog power supply powers the A/D converter chip.

+3.3 V

100 nF

C86

100 nF

Figure 13. Analog Supply Circuit

User’s Manual 43

4.5 Other Hardware

4.5.1 Clock Doubler

The RCM4200 takes advantage of the Rabbit 4000 microproces sor’s internal clock doubler. A built-in clock doubler allows half-frequency crystals to be used to reduce radiated emissions. The 58.98 MHz frequency specified for the RCM4200 model is generated using a 29.49 MHz crystal.

The clock doubler may be disabled if 58.98 MHz clock speeds are not required. Disabling the Rabbit 4000 microprocessor’s internal clock doubler will reduce power consumption and further reduce radiated emissions. The clock doubler is disabled with a simple configuration macro as shown below.

1. Select the “Defines” tab from the Dynamic C Options > Project Options menu.

2. Add the line CLOCK_DOUBLED=0 to always disable the clock doubler. The clock doubler is enabled by default, and usually no entry is needed. If you need to

specify that the clock doubler is always enabled, add the line CLOCK_DOUBLED=1 to always enable the clock doubler.

3. Click OK to save the macro. The clock doubler will now remain off whenever you are in the project file where you defined the macro.

4.5.2 Spectrum Spreader

The Rabbit 4000 features a spectrum spreader, which helps to mitigate EMI problems. The spectrum spreader is on by default, but it may also be turned off or set to a stronger setting. The means for doing so is through a simple configuration macro as shown below.

1. Select the “Defines” tab from the Dynamic C Options > Project Options menu.

2. Normal spreading is the default, and usually no entry is needed. If you need to specify normal spreading, add the line

ENABLE_SPREADER=1

For strong spreading, add the line

ENABLE_SPREADER=2

To disable the spectrum spreader, add the line

ENABLE_SPREADER=0

NOTE: The strong spectrum-spreading setting is not recommended since it may limit

the maximum clock speed or the maximum baud rate. It is unlikely that the strong setting will be used in a real application.

3. Click OK to save the macro. The spectrum spreader will now remain of f whenever you are in the project file where you defined the macro.

NOTE: Refer to the Rabbit 4000 Microprocessor User’s Manual for more infor mat ion

on the spectrum-spreading setting and the maximum clock speed.

44 RabbitCore RCM4200

4.6 Memory

4.6.1 SRAM

All RCM4200 modules have 512K of battery-backed data SRAM installed at U10, and the RCM4200 model has 512K of fast SRAM installed at U12.

4.6.2 Flash EPROM

All RCM4200 modules also have 512K of flash EPROM installed at U11.

NOTE: Rabbit Semiconductor rec ommends that any c ustomer applica tions shou ld not be

constrained by the sector size of the flash EPROM since it may be necessary to change the sector size in the future.

Writing to arbitrary flash memory addresses at run time is discouraged. Instead, define a “user block” area to store persistent data. The functions writeUserBlock and readUserBlock are provided for this. Refer to the

Designer’s Handbook

for additional information.

4.6.3 Serial Flash

Up to 8 Mbytes of serial flash memory is available to store data and Web pages. Sample programs in the SAMPLES\RCM4200\Serial_Flash folder illustrate the use of the serial flash memory.

Rabbit 4000 Microprocessor

User’s Manual 45

46 RabbitCore RCM4200

5. SOFTWARE REFERENCE

Dynamic C is an integrated development system for writing embedded software. It runs on an IBM-compatible PC and is designed for use with sing le-board computers and other devices based on the Rabbit microprocessor. Chapter 5 describes the libraries and function calls related to the RCM4200.

5.1 More About Dynamic C

Dynamic C has been in use worldwide since 1989. It is specially designed for programming embedded systems, and features quick compile and interactive debugging. A complete reference guide to Dynamic C is contained in the Dynamic C User’s Manual.

You have a choice of doing your software development in the flash memory or in the static SRAM included on the RCM4200. The flash m emory and SR AM op tions are sel ected with the Options > Program Options > Compiler menu.

The advantage of working in RAM is to save wear on the flash memory, which is limited to about 100,000 write cycles. The disadvantage is that the code and data might not both fit in RAM.

NOTE: An application can be compi led di rectl y to the ba tter y-backe d d ata SRAM on the

RCM4200 module, but should b e run from t he fa st SRAM afte r the seri al pr ogramming cable is disconnect e d. Your final code must a l wa ys be s t or e d in flash me mor y f or reliabl e op er ati on . RCM4200 modul es have a fast pro gram exe cution SRAM that is not battery-backed. Select

Options > Project Options > Compiler menu to store the code in flash and copy it to

the fast program execution SRAM at run-time to take advantage of the faster clock speed. This option optimizes the performance of RCM4200 modules running at

58.98 MHz.

NOTE: Do not depend on the flash memory sector size or type in your program logic.

The RCM4200 and Dynamic C were designed to accommodate flash devices with various sector sizes in response to the volatility of the flash-memory market.

Developing software with Dynamic C is simple. Users can write, compile, and test C and assembly code without leaving the Dynamic C development environment. Debugging occurs while the application runs on the target. Alternatively, users can compile a program to an image file for later loading. Dynamic C runs on PCs under Windows 95 and later. Programs can be downloaded at baud rates of up to 460,800 bps after the program compiles.

User’s Manual 47

Code and BIOS in Flash, Run in RAM from the Dynamic C

Dynamic C has a number of standard features.

• Full-feature source and/or assembly-level debugger, no in-circuit emulator required.

• Royalty-free TCP/IP stack with source code and most common protocols.

• Hundreds of functions in source-code libraries and sample programs:

X Exceptionally fast support for floating-point arithmetic and transcendental functions. X RS-232 and RS-485 serial communication. X Analog and digital I/O drivers.

X I

C, SPI, GPS, file system.

X LCD display and keypad drivers.

• Powerful language extensions for cooperative or preemptive multitasking

• Loader utility program to load binary images into Rabbit targets in the absence of

Dynamic C.

• Provision for customers to create their own source code libraries and augment on-line help by creating “function description” block comments using a special format for library functions.

• Standard debugging features:

X Breakpoints—Set breakpoints that can disable interrupts. X Single-stepping—Step into or over functions at a source or machine code level, µC/OS-II aware. X Code disassembly—The disassembly window displays addresses, opcodes, mnemonics, and

machine cycle times. Switch between debugging at machine-code level and source-code level by simply opening or closing the disassembly window.

X Watch expressions—Watch expressions are compiled when defined, so complex expressions

including function calls may be placed into watch expressions. Watch expressions can be updated with or without stopping program execution.

X Register window—All processor reg isters and f lags are disp layed. The con tents of gener al regist ers

may be modified in the window by the user.

X Stack window—shows the contents of the top of the stack. X Hex memory dump—displays the contents of memory at any address. X STDIO window—

detected for debugging purposes.

printf outputs to this window and keyboard input on the host PC can be

printf output may also be sent to a serial port or file.

48 RabbitCore RCM4200

5.2 Dynamic C Function Calls

5.2.1 Digital I/O

The RCM4200 was designed to interface with other systems, and so there are no drivers written specifically for the I/O. The general Dynamic C read and write functions allow you to customize the parallel I/O to meet your specific needs. For example, use

WrPortI(PEDDR, &PEDDRShadow, 0x00);

to set all the Port E bits as inputs, or use

WrPortI(PEDDR, &PEDDRShadow, 0xFF);

to set all the Port E bits as outputs. When using the auxiliary I/O bus on the Rabbit 4000 chip, add the line

#define PORTA_AUX_IO // required to enable auxiliary I/O bus

to the beginning of any programs using the auxiliary I/O bus. The sample programs in the Dynamic C

SAMPLES/RCM4200

folder provide further

examples.

5.2.2 Serial Co mmunication Drive rs

Library files included with Dynamic C provide a full range of serial communications support. The

PACKET.LIB

RS232.LIB

library provides a set of circular-buffer-based serial functions. The

library provides packet-based serial functions where packets can be delimited by the 9th bit, by transmission gaps, or with user-defined special characters. Both libraries provide blocking functions, which do not return until they are finished transmitting or receiving, and nonblocking functions, which must be called repeatedly until they are finished, allowing other functions to be performed between calls. For more information, see the Dynamic C Function Reference Manual and Technical Note TN213, Rabbit Serial Port Software.

5.2.3 User Block

Certain function calls involve reading and storing calibration constants from/to the simulated EEPROM in flash memory located at the top 2K of the reserved user block memory area (3800–39FF). This leaves the address range 0–37FF in the user block available for your application.

These address ranges may change in the future in response to the volatility in the flash memory market, in particular sector size. The sample program

USERBLOCK_INFO.C in

the Dynamic C SAMPLES\USERBLOCK folder can be used to determine the version of the ID block, the size of the ID and user blocks, whether or not the ID/user blocks are mirrored, the total amount of flash memory used by the ID and user blocks, and the area of the user block available for your application.

The USERBLOCK_CLEAR.C sample program shows you how to clear and write the contents of the user block that you are using in your application (the calibration constants in the reserved area and the ID block are protected).

User’s Manual 49

5.2.4 SRAM Use

The RCM4200 module has a battery-backed data SRAM and a program-execution SRAM. Dynamic C provides the

protected

keyword to identify variables that are to be placed into the battery-backed SRAM. The compiler generates code that maintains two copies of each protected variable in the battery-backed SRAM. The co mpiler also gene rates a flag to ind icat e whic h copy of the protected variable is valid at the current time. This flag is also stored in the battery-backed SRAM. When a protected variable is updated, the “inactive” copy is modified, and is made “active” only when the update is 100% complete. This assures the integrity of the data in case a reset or a power failure occurs during the update process. At power-on the application program uses the active copy of the variable pointed to by its associated flag.

The sample code below shows how a protected variable is defined and how its value can be restored.

main() { protected int state1, state2, state3; ...

_sysIsSoftReset(); // restore any protected variables

The

bbram

keyword may also be used instead if there is a need to store a variable in

battery-backed SRAM without affecting the performance of the application program. Data integrity is not assured when a reset or power failure occurs during the update process.

Additional information on

bbram

and

protected

variables is available in the Dynamic C

User’s Manual.

5.2.4.1 SRAM Chip Select Considerations

The basic SRAM memory on Rabbit-based boards is always connected to /CS1, /OE1, and /WE1. Both the data SRAM and the program execution fast SRAM on the RCM4200 share /OE1.

The BIOS-defined macro,

CS1_ALWAYS_ON

, is set to 0 by default to disable /CS1 (set it high). The macro may be redefined in the BIOS to 1, which will set a bit in the MMIDR register that forces /CS1 to stay enabled (low). This capability is normally used to speed up access time for battery-backed SRAM as long as no other memory chips are connected to /OE1 and /WE1. Therefore, the

CS1_ALWAYS_ON

macro must remain at i ts def ault se tti ng

of 0 to avoid conflicts between the data SRAM and the program execution fast SRAM.

50 RabbitCore RCM4200

5.2.5 RCM4200 Cloning

The RCM4200 does not have a pull-up resistor on the PB1 (CLKA) line of the programming port. Because of this, the procedure to generate clones from the RCM4200 differs from that used for other RabbitCore modules and single-boards computers. You must set the

CL_FORCE_MASTER_MODE

macro to 1 in the Dynamic C

CLONECONFIG.LIB

library to use the RCM4200 as a master for cloning. An RCM4200 master will not run the application, and further debugging is not possible as long as the

CL_FORCE_MASTER_MODE

macro is set to 1. Any cloned RCM4200 modules will be “sterile,” meaning that they cannot be used as a master for cloning. To develop and debug an application on an RCM4200, comment out the

NOTE: Instead of defining this macro is your application, you may simply add the line

CL_FORCE_MASTER_MODE=1

Options “Defines” tab, then click OK. When you recompile your program, this will have the same effect as setting the macro to 1 within the CLONECONFIG.LIB library.

CL_FORCE_MASTER_MODE

under the Dynamic C Options > Project

macro or set it to 0.

See Technical Note TN207, Rabbit Cloning Board, for additional information on Rabbit Semiconductor’s cloning board and how cloning is done.

5.2.6 Serial Flash Drivers

The Dynamic C LIB\SerialFlash\SFLASH.LIB and LIB\SerialFlash\

SFLASH_FAT.LIB

libraries provide the function calls needed to use the serial flash. The

FAT file system function calls are in the Dynamic C LIB\FileSystem\

FAT_CONFIG.LIB

library.

User’s Manual 51

5.2.7 Prototyping Board Function Calls

The functions described in this section are for use with the Prototyping Board features. The source code is in the Dynamic C

LIB\RCM4xxx\RCM42xx.LIB library if you need

to modify it for your own board design.

NOTE: The analog input fun ction c alls are supp orted o nly by th e RCM4200 mode l sinc e

the RCM4210 does not have an A/D converter.

The sample programs in the Dynamic C

SAMPLES\RCM4200

folder illustrate the use of

the function calls. Other generic functions applicable to all devices based on Rabbit microprocessors are

described in the Dynamic C Function Reference Manual.

5.2.7.1 Board Initialization

brdInit

void brdInit(void);

DESCRIPTION

Call this function at the beginning of your program. This function initializes Parallel Ports A through E for use with the Prototyping Board, and on the RCM4200 model loads the stored calibration constants for the A/D converter . This function call is intended for demonstration purposes only, and can be modified for your applications.

Summary of Initialization

1. I/O port pins are configured for Prototyping Board operation.

2. Unused configurable I/O are set as tied outputs.

3. RS-232 is not enabled.

4. LEDs are off.

5. The slave port is disabled.

RETURN VALUE

None.

52 RabbitCore RCM4200

5.2.7.2 Alerts

These function calls can be found in the Dynamic C LIB\RCM4xxx\RCM4xxx.LIB library .

timedAlert

void timedAlert(unsigned long timeout);

DESCRIPTION

Polls the real-time clock until a timeout occurs. The RCM4200 will be in a low-power mode during this time. Once the timeout occurs, this function call will enable the normal power source.

PARAMETER

timeout the duration of the timeout in seconds

RETURN VALUE

None.

digInAlert

void digInAlert(int dataport, int portbit, int value,

unsigned long timeout);

DESCRIPTION

Polls a digital input for a set value or until a timeout occurs. The RCM 4400W will be in a low-power mode during this time. Once a timeout occurs or the correct byte is received, this function call will enable the normal po wer source and exit.

PARAMETERS

dataport the input port data register to poll (e.g., PADR) portbit the input port bit (0–7) to poll value the value of 0 or 1 to receive

timeout

RETURN VALUE

None.

the duration of the timeout in seconds (enter 0 for no timeout)

User’s Manual 53

5.2.8 Analog Inputs (RCM4200 only)

The function calls used with the Prototyping Board features and the A/D converter on the RCM4200 model are in the Dynamic C LIB\RCM4xxx\ADC_ADS7870.LIB library. Dynamic C v. 10.07 or later is required to use the A/D converter function calls.

anaInConfig

unsigned int anaInConfig(unsigned int instructionbyte,

unsigned int cmd, long brate);

DESCRIPTION

Use this function to configure the A/D converter. This function will address the A/D converter chip in Register Mode on ly, and will retur n an error if you try the Direct Mode. Appendix B.4.3 provides additional addressing and command information.

ADS7870 Signal ADS7870 State RCM4200 Function/State

LN0 Input AIN0 LN1 Input AIN1 LN2 Input AIN2 LN3 Input AIN3 LN4 Input AIN4 LN5 Input AIN5 LN6 Input AIN6 LN7 Input AIN7

/RESET Input Board reset device

RISE/FALL Input Pulled up for SCLK active on rising edge

I/O0 Input Pulled down I/O1 Input Pulled down I/O2 Input Pulled down I/O3 Input Pulled down

CONVERT Input Pulled down when not driven

BUSY Output PE0 pulled down; logic high state converter is busy

CCLKCNTRL Input Pulled down; 0 state sets CCLK as input

CCLK Input Pulled down; external conversion clock SCLK Input PB0; serial data transfer clock

SDI Input PC4; 3-wire mode for serial data input

SDO Output PC5; serial data output /CS driven

/CS Input BUFEN pulled up; active-low enables serial interface

BUFIN Input Driven by VREF

VREF Output Connected to BUFIN and BUFOUT

BUFOUT Output Driven by VREF

54 RabbitCore RCM4200

PARAMETERS

anaInConfig (continued)

instructionbyte

cmd

brate

RETURN VALUE

0 on write operations data value on read operations

the instruction byte that will initi ate a read or write operation

at 8 or 16 bits on the designated register addres s. For example,

checkid = anaInConfig(0x5F, 0, 9600);

// read ID and set byte rate

the command data that configure the registers addressed by the instruction byte. Enter 0 i f you are p erfo rming a rea d oper ati on. For example,

i = anaInConfig(0x07, 0x3b, 0);

// write ref/osc reg and enable

the serial cl ock t rans fer rate of 9600 to 1 1 5,20 0 byt es p er s econd.

brate

must be set the first time this function is called. Enter 0 for

this parameter thereafter, for exampl e,

anaInConfig(0x00, 0x00, 9600);

// resets device and sets byte rate

SEE ALSO

anaInDriver, anaIn, brdInit

User’s Manual 55

anaInDriver

int anaInDriver(unsigned int cmd);

DESCRIPTION

Reads the voltage of an analog input channel by serial-clocking an 8-bit command to the A/D converter by its Direct Mode method. This fun ction assumes that Mode1 (mos t significant by te fi rst) a nd the A/D co nverter o scill ator ha ve been enable d. See

Config()

The conversion begins immediately after the last data bit has been transferred. An exception error w ill occur if Direct Mo de bit D7 is not set.

An exception error will occur if Direct Mode bit D7 is not set.

PARAMETERS

cmd contains a gain code and a channel code as follows.

for the setup.

D7—1; D6–D4—Gain Code; D3–D0—Channel Code

Use the following calculation and the tables below to determine cmd:

cmd = 0x80 | (gain_code*16) + channel_code

anaIn-

Gain Code

0×1 1×2 2×4 3×5 4×8 5×10 6×16 7×20

Gain

Multiplier

56 RabbitCore RCM4200

anaInDriver (continued)

Channel Code

0 +AIN0 -AIN1 8 AIN0 AIN0* 1 +AIN2 -AIN3 9 AIN1 AIN1* 2 +AIN4 -AIN5 10 AIN2 AIN2*

†

4 -AIN0 +AIN1 12 AIN4 AIN4 5 -AIN2 +AIN3 13 AIN5 AIN5 6 -AIN4 +AIN5 14 AIN6 AIN6

‡

* Negative input is ground. † Not accessible on Prototyping Board ‡ Not accessible on Prototyping Board

RETURN VALUE

A value corresponding to the voltage on the analog input channel: 0–2047 for 11-bit conversions

-2048–2047 for 12-bi t con versions

ADTIMEOUT ADOVERFLOW

Differential Input

Lines

+AIN6 -AIN7 11 AIN3 AIN3

-AIN6 +AIN7 15 AIN7 AIN7*

Channel Code

Single-Ended

Input Lines

(-4095) if the conversion is incomplete or busy bit timeout

(-4096) for overflow or out of range

4–20 mA

Lines

SEE ALSO

anaInConfig, anaIn, brdInit

User’s Manual 57

anaIn

int anaIn(unsigned int channel, int opmode, int gaincode);

DESCRIPTION

Reads the value of an analog input channel using the Direct Mode method of a ddressing the A/D converter. Note that it takes about 1 second to ensure an internal capacitor on the A/D conve rter is charged when the function is called th e first time.

PARAMETERS

channel

opmode

channel SINGLE DIFF mAMP

0 +AIN0 +AIN0 -AIN1 1 +AIN1 +AIN1 -AIN0* +AIN1*

2 +AIN2 +AIN2 -AIN3 +AIN2* 3 +AIN3 +AIN3 -AIN2* +AIN3 4 +AIN4 +AIN4 -AIN5 +AIN4 5 +AIN5 +AIN5 -AIN4* +AIN5 6 +AIN6 +AIN6 -AIN7* +AIN6 7 +AIN7 +AIN7 -AIN6* +AIN7*

* Not accessible on Prototyping Board.

the channel number (0 to 7) corresponding to LN0 to LN7. the mode of operation:

SINGLE DIFF mAMP

—single-ended input —differential input —4–20 mA input

+AIN0

gaincode the gain code of 0 to 7 (applies only to Prototyping Board):

Gain Code

0 ×1 0–22.5 1 ×2 0–11.25 2×40–5.6 3×50–4.5 4×80–2.8 5 ×10 0–2.25 6 ×16 0–1.41 7 ×20 0–1.126

58 RabbitCore RCM4200

Gain

Multiplier

Voltage Range

(V)

RETURN VALUE

A value corresponding to the voltage on the analog input channel: 0–2047 for single-ended conversions

-2048–2047 for differential conve rsions

ADTIMEOUT ADOVERFLOW

SEE ALSO

anaIn, anaInConfig, anaInDriver

anaIn (continued)

(-4095) if the conversion is incomplete or busy bit timeout

(-4096) for overflow or out of range

User’s Manual 59

anaInCalib

int anaInCalib(int channel, int opmode, int gaincode,

int value1, float volts1, int value2, float volts2);

DESCRIPTION

Calibrates the re spons e of the des ired A/D conve rter cha nnel as a l inear f unction using the two conversion points provided. Four values are calculated and placed into global tables

_adcCalibS, _adcCalibD

ed EEPROM using the funct i on stant and a voltage offset.

PARAMETERS

channel the channel number (0 to 7) corresponding to LN0 to LN7.

, and

adcCalibM

anaInEEWr()

to be later st ored in to si mulat-

. Each channel will have a li ne ar con-

opmode

the mode of operation:

SINGLE DIFF mAMP

channel SINGLE DIFF mAMP

0 +AIN0 +AIN0 -AIN1 1 +AIN1 +AIN1 -AIN0* +AIN1*

2 +AIN2 +AIN2 -AIN3 +AIN2* 3 +AIN3 +AIN3 -AIN2* +AIN3 4 +AIN4 +AIN4 -AIN5 +AIN4 5 +AIN5 +AIN5 -AIN4* +AIN5 6 +AIN6 +AIN6 -AIN7* +AIN6 7 +AIN7 +AIN7 -AIN6* +AIN7*

* Not accessible on Prototyping Board.

—single-ended input —differential input —4–20 mA input

+AIN0

60 RabbitCore RCM4200

anaInCalib (continued)

gaincode the gain code of 0 to 7 (applies only to Prototyping Board):

Gain Code

0 ×1 0–22.5 1 ×2 0–11.25 2×40–5.6 3×50–4.5 4×80–2.8 5 ×10 0–2.25 6 ×16 0–1.41 7 ×20 0–1.126

value1 the first A/D converter channel raw count value (0–2047) volts1 the voltage or current corresponding to the first A/D converter

Gain

Multiplier

Voltage Range

(V)

channel value (0 to +20 V or 4 to 20 mA)

value2 the second A/D converter channel raw count value (0–2047) volts2 the voltage or current corresponding to the first A/D converter

channel value (0 to +20 V or 4 to 20 mA)

RETURN VALUE

0 if successful.

-1 if not able to make calibration constants.

SEE ALSO

anaIn, anaInVolts, anaInmAmps, anaInDiff, anaInCalib, brdInit

User’s Manual 61

anaInVolts

float anaInVolts(unsigned int channel, unsigned int gaincode);

DESCRIPTION

Reads the state of a single-ended analog input channel and uses the previously set calibration constants to convert it to volts.

PARAMETERS

channel the channel number (0 to 7) corresponding to LN0 to LN7.

Channel Code

Single-Ended

Input Lines

Voltage Range

(V)

†

0 +AIN0 0–22.5 1 +AIN1 0–22.5 2 +AIN2 0–22.5 3 +AIN3 0–22.5 4 +AIN4 0–22.5 5 +AIN5 0–22.5 6 +AIN6 0–22.5

7+AIN7

0–2

‡

* Negative input is ground. † Applies to Prototyping Board. ‡ Used for thermistor in sample program.

gaincode the gain code of 0 to 7 (applies only to Prototyping Board):

Gain Code

Gain

Multiplier

Voltage Range

(V)

0 ×1 0–22.5 1 ×2 0–11.25 2×40–5.6 3×50–4.5 4×80–2.8 5 ×10 0–2.25 6 ×16 0–1.41 7 ×20 0–1.126

* Applies to Prototyping Board.

62 RabbitCore RCM4200

RETURN VALUE

A voltage value corresponding to the voltage on the analog input channel.

anaInVolts (continued)

ADTIMEOUT

ADOVERFLOW

SEE ALSO

anaInCalib, anaIn, anaInmAmps, brdInit

(-4095) if the conversion is incomplete or busy bit timeout.

(-4096) for overflow or out of range.

User’s Manual 63

anaInDiff

float anaInDiff(unsigned int channel, unsigned int gaincode);

DESCRIPTION

Reads the state o f diff erential analog input channels an d uses the previousl y set calibr ation constants to convert it to volts.

PARAMETERS

channel the channel number (0 to 7) corresponding to LN0 to LN7.

channel DIFF

0+AIN0 -AIN1 1+AIN1 -AIN1 —

2 +AIN2 -AIN3 -22.5 to +22.5* 3+AIN3 -AIN3 — 4 +AIN4 -AIN5 -22.5 to +22.5* 5+AIN5 -AIN5 — 6+AIN6 -AIN7 — 7+AIN7 -AIN7 —

* Accessible on Prototyping Board.

Voltage Range

(V)

-22.5 to +22.5

gaincode the gain code of 0 to 7 (applies only to Prototyping Board):

Gain Code

0 ×1 -22.5 – +22.5 1 ×2 -11.25 – +11.25 2 ×4 - 5.6 – +5. 6

Gain

Multiplier

Voltage Range

(V)

3 ×5 - 4.5 – +4. 5 4 ×8 - 2.8 – +2. 8 5 ×10 -2.25 – +2.25 6 ×16 -1.41 – +1.41 7 ×20 -1.126 – +1.126

64 RabbitCore RCM4200

RETURN VALUE

A voltage value corresponding to the voltage differential on the analog input channel.

anaInDiff (continued)

ADTIMEOUT

ADOVERFLOW

SEE ALSO

anaInCalib, anaIn, anaInmAmps, brdInit

(-4095) if the conversion is incomplete or busy bit timeout.

(-4096) for overflow or out of range.

User’s Manual 65

anaInmAmps

float anaInmAmps(unsigned int channel);

DESCRIPTION

Reads the state of an analog input channel and uses the previously set calibration constants to convert it to current.

PARAMETERS

channel the channel number (0 to 7) corresponding to LN0 to LN7.

RETURN VALUE

A current value between 4.00 and 20.00 mA corresponding to the current on the analog input channel.

ADTIMEOUT

Channel Code

0+AIN0 1+AIN1 2+AIN2

3 4 +AIN4*

5 +AIN5* 6 +AIN6* 7+AIN7

* Negative input is ground. † Applies to Prototyping Board.

4–20 mA

Input Lines

†

+AIN3

(-4095) if the conversion is incomplete or busy bit timeout.

ADOVERFLOW

SEE ALSO

(-4096) for overflow or out of range.

anaInCalib, anaIn, anaInVolts

66 RabbitCore RCM4200

anaInEERd

root int anaInEERd(unsigned int channel, unsigned int opmode,

unsigned int gaincode);

DESCRIPTION

Reads the cali br at ion constants, gai n, and offs et for an input ba sed on their desig na te d position in the flash memory, and places them into global tables

_adcCalibD

following macros can be used to identify the starting address for these locations.

ADC_CALIB_ADDRS, address start of single-ended analog input channels ADC_CALIB_ADDRD, address start of differential analog input channels ADC_CALIB_ADDRM, address start of milliamp analog input channels

NOTE: This function cannot be run in RAM.

PARAMETER

channel the channel number (0 to 7) corresponding to LN0 to LN7.

, and

_adcCalibM

for analog inputs. Dependi ng on th e flas h siz e, the

_adcCalibS

opmode

the mode of operation:

SINGLE DIFF mAMP

channel SINGLE DIFF mAMP

0 +AIN0 +AIN0 -AIN1 1 +AIN1 +AIN1 -AIN0* +AIN1*

2 +AIN2 +AIN2 -AIN3 +AIN2* 3 +AIN3 +AIN3 -AIN2* +AIN3 4 +AIN4 +AIN4 -AIN5 +AIN4 5 +AIN5 +AIN5 -AIN4* +AIN5 6 +AIN6 +AIN6 -AIN7* +AIN6 7 +AIN7 +AIN7 -AIN6* +AIN7*

ALLCHAN read all channels for selected opmode

* Not acce ss ible on Prototyping Board.

—single-ended input —differential input —4–20 mA input

+AIN0

User’s Manual 67

anaInEERd (continued)

gaincode the gain code of 0 to 7. The gaincode parameter is ignored when

channel is ALLCHAN.

RETURN VALUE

0 if successful.

-1 if address is invalid or out of range.

SEE ALSO

anaInEEWr, anaInCalib

Gain Code

0 1 2 3 ×5 0–4.5 4 5 6 7

Gain

Multiplier

×1 0–22.5 ×2 0–11.25 ×4 0–5.6

×8 0–2.8 ×10 0–2.25 ×16 0–1.41 ×20 0–1.126

* Applies to Prototyping Board.

Voltage Range

(V)

68 RabbitCore RCM4200

anaInEEWr

int anaInEEWr(unsigned int channel, int opmode,

unsigned int gaincode);

DESCRIPTION

Writes the calibration constants, gain, and offset for an input based from global tables

_adcCalibS, _adcCalibD

memory . Depe nding on th e flash si ze, the fo llowing macros can be used to ide ntify the starting address for these locations.

NOTE: This function cannot be run in RAM.

PARAMETER

channel the channel number (0 to 7) corresponding to LN0 to LN7.

, and

_adcCalibM

to designated pos itions in the flash

opmode

the mode of operation:

SINGLE DIFF mAMP

channel SINGLE DIFF mAMP

0 +AIN0 +AIN0 -AIN1 1 +AIN1 +AIN1 -AIN0* +AIN1*

2 +AIN2 +AIN2 -AIN3 +AIN2* 3 +AIN3 +AIN3 -AIN2* +AIN3 4 +AIN4 +AIN4 -AIN5 +AIN4 5 +AIN5 +AIN5 -AIN4* +AIN5 6 +AIN6 +AIN6 -AIN7* +AIN6 7 +AIN7 +AIN7 -AIN6* +AIN7*

ALLCHAN read all channels for selected opmode

* Not accessible on Prototyping Board.

—single-ended input —differential input —4–20 mA input

+AIN0

User’s Manual 69

anaInEEWr (continued)

gaincode the gain code of 0 to 7. The gaincode parameter is ignored when

channel is ALLCHAN.

RETURN VALUE

0 if successful

-1 if address is invalid or out of range.

SEE ALSO

anaInEEWr, anaInCalib

Gain Code

0 ×1 0–22.5 1 ×2 0–11.25 2×40–5.6 3×50–4.5 4×80–2.8 5 ×10 0–2.25 6 ×16 0–1.41 7 ×20 0–1.126

* Applies to Prototyping Board.

Gain

Multiplier

Voltage Range

(V)

70 RabbitCore RCM4200

5.3 Upgrading Dynamic C

Dynamic C patches that focus on bug fixes are available from time to time. C heck the Web site www.rabbit.com/support/ for the latest patches, workarounds, and bug fixes.

5.3.1 Add-On Modules

Dynamic C installations are designed for use with the board they are included with, and are included at no charge as part of our low-cost kits. Rabbit Semiconductor offers for purchase add-on Dynamic C modules including the popular µC/OS-II real-time operating system, as well as PPP, Advanced Encryption Standard (AES), FAT file system, RabbitWeb, and other select libraries.

NOTE: Version 2.10 or later of the Dynamic C FAT file system module is required for

the RCM4200 modules.

Each Dynamic C add-on module has complete documentation and sample programs to illustrate the functionality of the software calls in the module. Visit our Web site at

www.rabbit.com for further information and complete documentation for each module.

In addition to the Web-based technical support included at no extra charge, a one-year telephone-based technical support module is also available for purchase.

User’s Manual 71

72 RabbitCore RCM4200

6. USING THE TCP/IP FEATURES

6.1 TCP/IP Connections

Programming and development can be done with the RCM4200 without connecting the Ethernet port to a network. However, if you will be running the sample programs that use the Ethernet capability or will be doi ng Ethernet-enabled develo pment, you should conn ect the RCM4200 module’s Ethernet port at this time.

Before proceeding you will need to have the following items.

• If you don’t have Ethernet access, you will need at least a 10Base-T Ethernet card (available from your favorite computer supplier) installed in a PC.

• Two RJ-45 straight-through Ethernet cables and a hub, or an RJ-45 crossover Ethernet cable.

Figure 14 shows how to identify the two Ethernet cables based on the wires in the transparent RJ-45 connectors.

Same

color order

in connectors

Different

color order

in connectors

StraightThrough

Cable

Figure 14. How to Identify Straight-Through and Crossover Ethernet Cables

Ethernet cables and a 10Base-T Ethernet hub are available from Rabbit Semiconductor in a TCP/IP tool kit. More information is available at www.rabbit.com.

Now you should be able to make your connections.

User’s Manual 73

Crossover

Cable

1. Connect the AC adapter and the serial programming cable as shown in Chapter 2, “Getting Started.”

2. Ethernet Connections There are four options for connecting the RCM4200 module to a network for develop-

ment and runtime purposes. The first two options permit total freedom of action in selecting network addresses and use of the “network,” as no action can interfere with other users. We recommend one of these options for initial development.

• No LAN — The simplest alternative for desktop development. Connect the RCM4200 module’s Ethernet port directly to the PC’s network interface card using an RJ-45 crossover cable. A crossover cable is a special cable that flips some connections between the two connectors and permits direct connection of two client systems. A standard RJ-45 network cable will not work for this purpose.

Micro-LAN — Another simple alternative for desktop development. Use a small Eth-

•

ernet 10Base-T hub and connect both the PC’s network interface card and the RCM4200 module’s Ethernet port to it using standard network cables.

The following options require more care in address selection and testing actions, as conflicts with other users, servers and systems can occur:

•

LAN — Connect the RCM4200 module’s Ethernet port to an existing LAN, preferably

one to which the development PC is already connected. You will need to obtain IP addressing information from your network administrator.

• WAN — The RCM4200 is capable of direct connection to the Internet and other W ide Area Networks, but exceptional care should be used with IP address settings and all network-related programming and development. We recommend that development and debugging be done on a local network before connecting a RabbitCore system to the Internet.

TIP: Checking and debugging the initial setup on a micro-LAN is recommended before

connecting the system to a LAN or WAN.

The PC running Dynamic C does not need to be the PC with the Ethernet card.

3. Apply Power Plug in the AC adapter. The RCM4200 module and Prototyping Board are now ready to

be used.

74 RabbitCore RCM4200

6.2 TCP/IP Primer on IP Addresses

Obtaining IP addresses to interact over an existing, operating, network can involve a number of complications, and must usually be done with cooperation from your ISP and/or network systems administrator. For this reason, it is suggested that the user begin instead by using a direct connection between a PC and the RCM4200 using an Ethernet crossover cable or a simple arrangement with a hub. (A crossover cable should not be confused with regular straight through cables.)

In order to set up this direct connection, the user will have to use a PC without networking, or disconnect a PC from the corporate network, or install a second Ethernet adapter and set up a separate private network attached to the second Ethernet adapter. Disconnecting your PC from the corporate network may be easy or nearly impossible, depending on how it is set up. If your PC boots from the network or is dependent on the network for some or all of its disks, then it probably should not be disconnected. If a second Ethernet adapter is used, be aware that Windows TCP/IP will send messages to one adapter or the other, depending on the IP address and the binding order in Microsoft products. Thus you should have different ranges of IP addresses on your private network from those used on the corporate network. If both networks service the same IP address, then Windows may send a packet intended for your private network to the corporate network. A similar situation will take place if you use a dial-up line to send a packet to the Internet. Windows may try to send it via the local Ethernet network if it is also valid for that network.

The following IP addresses are set aside for local networks and are not allowed on the Internet: 10.0.0.0 to 10.255.255.255, 172.16.0.0 to 172.31.255.255, and 192.168.0.0 to

192.168.255.255. The RCM4200 uses a 10Base-T type of Ethernet connection, which is the most common

scheme. The RJ-45 connectors are similar to U.S. style telephone connectors, except they are larger and have 8 contacts.

An alternative to the direct connection using a crossover cable is a direct connection using a hub. The hub relays packets received on any port to all of the ports on the hub. Hubs are low in cost and are readil y availa ble . The R CM4200 us es 10 Mbp s Ethernet, so the hub or Ethernet adapter can be a 10 Mbps unit or a 10/100 Mbps unit.

In a corporate setting where the Internet is brought in via a high-speed line, there are typically machines between the outside Internet and the internal network. These machines include a combination of proxy servers and firewalls that filter and multiplex Internet traffic. In the configuration below, the RCM4200 could be given a fixed address so any of the computers on the local network would be able to contact it. It may be possible to configure the firewall or proxy server to allow hosts on the Internet to directly contact the controller, but it would probably be easier to place the controller directly on the external network outside of the firewall. This avoids some of the configuration complications by sacrificing some security.

User’s Manual 75

Hub(s)

T1 in

Adapter

Ethernet

Typical Corporate Network

Firewall

Proxy

Server

Network

Ethernet

RCM4200

System

If your system administrator can give you an Ethernet cable along with its IP address, the netmask and the gateway address, then you may be able to run the sample programs without having to setup a direct connection between your computer and the RCM4200. You will also need the IP address of the nameserver, the name or IP address of your mail server, and your domain name for some of the sample programs.

76 RabbitCore RCM4200

6.2.1 IP Addresses Explained

IP (Internet Protocol) addresses are expressed as 4 decimal numbers separated by periods, for example:

216.103.126.155

10.1.1.6

Each decimal number must be between 0 and 255. The total IP address is a 32-bit number consisting of the 4 bytes expressed as shown above. A local network uses a group of adja-

cent IP addresses. There are always 2

IP addresses in a local network. The netmask (also called subnet mask) determines how many IP addresses belong to the local network. The netmask is also a 32-bit address expressed in the same form as the IP address. An example netmask is:

255.255.255.0

This netmask has 8 zero bits in the least significant portion, and this means that 2

addresses are a part of the local network. Applied to the IP address above (216.103.126.155), this netmask would indicate that the following IP addresses belong to the local network:

216.103.126.0

216.103.126.1

216.103.126.2 etc.

216.103.126.254

216.103.126.255

The lowest and highest address are reserved for special purposes. The lowest address (216.102.126.0) is used to identify the local network. The highest address (216.102.126.255) is used as a broadcast address. Usually one other address is used for the address of the gateway out of the network. This leaves 256 - 3 = 253 available IP addresses for the example given.

User’s Manual 77

6.2.2 How IP Addresses are Used

The actual hardware connection via an Ethernet uses Ethernet adapter addresses (also called MAC addresses). These are 48-bit addresses and are unique for every Ethernet adapter manufactured. In order to send a packet to another computer, given the IP address of the other computer, it is first determined if the packet needs to be sent directly to the other computer or to the gateway. In either case, there is an Ethernet address on the local network to which the packet must be sent. A table is maintained to allow the protocol driver to determine the MAC address corresponding to a particular IP address. If the table is empty, the MAC address is determined by sending an Ethernet broadcast packet to all devices on the local network asking the device with the desired IP address to answer with its MAC address. In this way, the table entry can be filled in. If no device answers, then the device is nonexistent or inoperative, and the packet cannot be sent.

Some IP address ranges are reserved for use on internal networks, and can be allocated freely as long as no two internal hosts have the same IP address. These internal IP addresses are not routed to the Internet, and any internal hosts using one of these reserved IP addresses cannot communicate on the external Internet without being connected to a host that has a valid Internet IP address. The host would either translate the data, or it would act as a proxy.

Each RCM4200 RabbitCore module has its own unique MAC address, which consists of the prefix 0090C2 followed by a code that is unique to each RCM4200 module. For example, a MAC address might be 0090C2C002C0.

TIP: You can always obtain the MAC address on your module by running the sample

program DISPLAY_MAC.C from the SAMPLES\TCPIP folder.

78 RabbitCore RCM4200

6.2.3 Dynamically Assigned Internet Addresses

In many instances, devices on a network do not have fixed IP addresses. This is the case when, for example, you are assigned an IP address dynamically by your dial-up Internet service provider (ISP) or when you have a device that provides your IP addresses using the Dynamic Host Configuration Protocol (DHCP). The RCM4200 modules can use such IP addresses to send and receive packets on the Internet, but you must take into account that this IP address may only be valid for the duration of the call or for a period of time, and could be a private IP address that is not directly accessible to others on the Internet. These addresses can be used to perform some Internet tasks such as sending e-mail or browsing the Web, but it is more difficult to participate in conversations that originate elsewhere on the Internet. If you want to find out this dynamically assigned IP address, under Windows NT or later you can run the ipconfig command (Start > Run >cmd) while you are connected and look at the interface used to connect to the Internet.

Many networks use IP addresses that are assigned using DHCP. When your computer comes up, and periodically after that, it requests its networking information from a DHCP server. The DHCP server may try to give you the same address each time, but a fixed IP address is usually not guaranteed.

If you are not concerned about accessing the RCM4200 from the Internet, you can place the RCM4200 on the internal network using an IP address assigned either statically or through DHCP.

User’s Manual 79

6.3 Placing Your Device on the Network

In many corporate settings, users are isolated from the Internet by a firewall and/or a proxy server. These devices attempt to secure the company from unauthorized network traffic, and usually work by disallowing traffic that did not originate from inside the network. If you want users on the Internet to communicate with your RCM4200, you have several options. You can either place the RCM4200 directly on the Internet with a real Internet address or place it behind the firewall. If you place the RCM4200 behind the firewall, you need to configure the firewall to translate and forward packets from the Internet to the RCM4200.

80 RabbitCore RCM4200

6.4 Running TCP/IP Sample Programs

We have provi ded a numb er of samp le prog rams de mons tratin g vari ous us es of TCP/ IP for networking embedded systems. These programs require you to connect your PC and the RCM4200 module together on the same network. This network can be a local private network (preferred for initial experimentation and debugging), or a connection via the Internet.

RCM4200

System

User’s PC

Ethernet crossover cable

Direct Connection

(network of 2 computers)

Ethernet cables

RCM4200

System

To additional

Hub

network elements

Direct Connection Using a Hub

User’s Manual 81

6.4.1 How to Set IP Addresses in the Sample Programs

With the introduction of Dynamic C 7.30 we have taken steps to make it easier to run many of our sample programs. You will see a TCPCONFIG macro. This macro tells Dynamic C to select your configuration from a list of default configurations. You will have three choices when you encounter a sample program with the TCPCONFIG macro.

1. You can replace the

MASK

, MY_GATEWAY, and MY_NAMESERVER macros in each program.

TCPCONFIG macro with individual MY_IP_ADDRESS, MY_NET-

2. You can leave TCPCONFIG at the usual default of 1, which will set the IP configurations

10.10.6.100, the netmask to 255.255.255.0, and the nameserver and gateway

to to

10.10.6.1. If you would like to change the default values, for example, to use an IP

address of 10.1.1.2 for the RCM4200 module, and 10.1.1.1 for your PC, you can edit the values in the section that directly follows the “General Configuration” comment in the TCP_CONFIG.LIB library. You will find this library in the LIB\TCPIP directory.

3. You can create a CUSTOM_CONFIG.LIB library and use a TCPCONFIG value greater than 100. Instructions for doing this are at the beginning of the TCP_CONFIG.LIB library in the

There are some other “standard” configurations for

LIB\TCPIP directory.

TCPCONFIG that let you select differ-

ent features such as DHCP. Their values are documented at the top of the TCP_CON-

FIG.LIB

library in the LIB\TCPIP directory. More information is available in the

Dynamic C TCP/IP User’ s Manual.

82 RabbitCore RCM4200

6.4.2 How to Set Up your Computer for Direct Connect

Follow these instructions to set up your PC or notebook. Check with your administrator if you are unable to change the settings as described here since you may need administrator privileges. The instructions are specifically for Windows 2000, but the interface is similar for other versions of Windows.

TIP: If you are using a PC that is already on a network, you will disconnect the PC from

that network to run these sample programs. Write down the existing settings before changing them to facilitate restoring them when you are finished with the sample programs and reconnect your PC to the network.

1. Go to the control panel (Start > Settings > Control Panel), and then double-click the Network icon.

2. Select the network interface card used for the Ethernet interface you intend to use (e.g.,

TCP/IP Xircom Credit Card Network Adapter) and click on the “Properties” button.

Depending on which version of Windows your PC is running, you may have to select the “Local Area Connection” first, and then click on the “Properties” button to bring up the Ethernet interface dialog. Then “Configure” your interface card for a “10Base-T Half-Duplex” or an “Auto-Negotiation” connection on the “Advanced” tab.

NOTE: Your network interface card will likely have a different name.

3. Now select the IP Address tab, and check Specify an IP Address, or select TCP/IP and click on “Properties” to assign an IP address to your computer (this will disable “obtain an IP address automatically”):

IP Address : 10.10.6.101 Netmask : 255.255.255.0 Default gateway : 10.10.6.1

4. Click <OK> or <Close> to exit the various dialog boxes.

RCM4200

IP 10.10.6.101 Netmask

255.255.255.0

System

User’s PC

Ethernet crossover cable

Direct Connection PC to RCM4200 Module

User’s Manual 83

6.5 Run the PINGME.C Sample Program

Connect the crossover cable from your computer’s Ethernet port to the RCM4200 module’s RJ-45 Ethernet connector. Open this sample program from the SAMPLES\TCPIP\

ICMP

folder, compile the program, and start it running under Dynamic C. The crossover cable is connected from your computer’s Ethernet adapter to the RCM4200 module’s RJ-45 Ethernet connector. When the program starts running, the green LINK light on the RCM4200 module should be on to indicate an Ethernet connection is made. (Note: If the LINK light does not light, you may not be using a crossover cable, or if you are using a hub with straight-through cables perhaps the power is off on the hub.)

The next step is to ping the module from your PC. This can be done by bringing up the MS-DOS window and running the pingme program:

ping 10.10.6.101

or by Start > Run and typing the entry

ping 10.10.6.101

The ping routine will ping the module four times and write a summary message on the screen describing the operation.

6.6 Running Additional Sample Programs With Direct Connect

The following sample programs are in the Dynamic C SAMPLES\RCM4200\TCPIP\ folder.

• BROWSELED.C—This program demonstrates a basic controller running a Web page.

Two “device LEDs” are created along with two buttons to toggle them. Users can use their Web browser to change the status of the lights. The DS2 and DS3 LEDs on the Prototyping Board will match those on the W eb page. As long as you have not modified the TCPCONFIG 1 macro in the sample program, enter the following server address in your Web browser to bring up the Web page served by the sample program.

http://10.10.6.100.

Otherwise use the TCP/IP settings you entered in the TCP_CONFIG.LIB library.

• PINGLED.C—This program demonstrates ICMP by pinging a remote host. It will flash

LEDs DS2 and DS3 on the Prototyping Board when a ping is sent and received.

• SMTP.C—This program demonstrates using the SMTP library to send an e-mail when

the S2 and S3 switches on the Prototyping Board are pressed. LEDs DS2 and DS3 on the Prototyping Board will light up when e-mail is being sent.

84 RabbitCore RCM4200

6.7 Where Do I Go From Here?

NOTE: If you purchased your RCM4200 t hrough a di strib utor or thr ough a Rabbi t partn er,

contact the distrib utor or partner first for tec hnical support.

If there are any problems at this point:

• Use the Dynamic C

Help menu to get further assistance with Dynamic C.

• Check the Rabbit Semiconductor Technical Bulletin Board and forums at

www.rabbit.com/support/bb/ and at www.rabbit.com/forums/.

• Use the Technical Support e-mail form at www.rabbit.com/support/.

If the sample programs ran fine, you are now ready to go on. Additional sample programs are described in the Dynamic C TCP/IP User’s Manual. Please refer to the Dynamic C TCP/IP User’s Manu al to develop your own applications.

An Introduction to TCP/IP provides background information on TCP/IP, and is available on the CD and on our Web site.

User’s Manual 85

86 RabbitCore RCM4200

APPENDIX A. RCM4200 SPECIFICATIONS

Appendix A provides the sp ecifications for the RCM4200, and describes the conformal coating.

User’s Manual 87

A.1 Electrical and Mechanical Characteristics

Figure A-1 shows the mechanical dimensions for the RCM4200.

1.84

(47)

R16

0.125

(3.2)

dia

× 2

(5)

0.19

R43 R45 R46

0.50

(13)

R42 R39 R44

C86

JP4

C17

C16

JP5

JP3

JP7

JP6

JP9

JP2

JP1

JP12

JP10

JP11

C75

R40

R41

C76

R51

R31

C82

C43

R11

R27

C15

U15

C74

JP13

C85

U14

JP15

JP14

C78

C72

C65

U13

R20

C57

C81

0.72

(18)

C27

C21

R10

C39

C14 C13

JP8

C12

C11

C10

C18

R29

R36

R12

R14

C77

C87

R32

R33

R35

R34

C88

C67

C58

R22

R18

C20

C19 C25

R13

JP16

C24

0.62

(16)

C29 C28

R23

R15

C23

R19

R21

C38

C36

C37

C35

C30

C34

C33

C32

C31

C26

R50

SPEED

R52

R48

DS2

DS3

R49

FDX

R47

LINK

DS1

(16.8)

0.661

(8.9)

0.35

0.10

(2.5)

(28)

1.10

(61)

2.42

0.54

Please refer to the RCM4200 footprint diagram later in this appendix for precise header locations.

(13.7)

(21)

0.84

1.84

(47)

2.42

(61)

(12)

0.47

(1.6)

0.064

(2.8)

0.11

(1.6)

0.064

0.23

0.11

(5.8)

(2.8)

(20)

0.77

(5.8)

0.23

Figure A-1. RCM4200 Dimensions

NOTE: All measurements are in inc hes fo llowed b y milli meters enclos ed in pa renthe ses.

All dimensions have a manufacturing tolerance of ±0.01" (0.25 mm).

88 RabbitCore RCM4200

It is recommended that you allow for an “exclusion zone” of 0.04" (1 mm) around the RCM4200 in all directions when the RCM4200 is incorporated into an assembly that includes other printed circuit boards. An “exclusion zone” of 0.08" (2 mm) is recommended below the RCM4200 when the RCM4200 is plugged into another assembly. Figure A-2 shows this “exclusion zone.”

2.50

(63)

(15)

0.58

2.42

(61)

(2)

0.08

Exclusion

1.92

(49)

Zone

(15)

0.58

(2)

0.08

1.84

(47)

Figure A-2. RCM4200 “Exclusion Zone”

User’s Manual 89

T ableA-1 lists the electrical, mechanical, and environmental specifications for the RCM4200.

Table A-1. RCM4200 Specifications

Parameter RCM4200 RCM4210

Microprocessor EMI Reduction Spectrum spreader for reduced EMI (radiated emissions)

Ethernet Port 10/100Base-T, RJ-45, 3 LEDs Data SRAM 512K (8-bit) Program Execution Fast

SRAM Flash Memory 512K (8-bit) Serial Flash Memory 8 Mbytes 4 Mbytes

Backup Battery

General Purpose I/O

Additional Inputs 2 startup mode, reset in, CONVERT 2 startup mode, reset in Additional Outputs Status, reset out, analog VREF Status, reset out

Analog Inputs

1, 2, 4, 5, 8, 10, 16, and 20 V/ V

Rabbit

25 parallel digital I/O lines:

• configurable with four layers of

4000 at 58.98 MHz Rabbit® 4000 at 29.49 MHz

512K (8-bit) —

Connection for user-supplied backup battery

(to support RTC and data SRAM)

alternate functions

8 channels single-ended

or 4 channels differential

Programmabl e gain

35 parallel digital I/O lines:

• configurable with four layers of alternate functions

—

• A /D Converter

Resolution

• A /D Conversion Time

(including 120 µs raw

Auxiliary I/O Bus

Serial Ports

12 bits (11 bits single-ended)

180 µs

Can be configured for 8 data lines and

6 address lines (shared with parallel I/O lines), plus I/O read/write

4 shared high-speed, CMOScompatib le p o rts:

• all 4 configurable as asynchronou s

(with IrDA), 4 as clocked serial (SPI)

• 1 as ynchronous clocked seri al port

shared with programming port

• 1 clocked serial port shared with

serial flash

5 shared high-speed, CMOScompatible ports:

• all 5 configurable as asynchronou s

(with IrDA), 4 as clocked serial (SPI), and 1 as SDLC/HDLC

• 1 clocked serial port shared with

serial flash

• 1 as ynchronous clocked se rial port

dedicated for programming

• 1 clocked serial port shared with

A/D converter

90 RabbitCore RCM4200

Table A-1. RCM4200 Specifications (continued)

Parameter RCM4200 RCM4210

Serial Rate Maximum asynchronous baud rate = CLK/8

Slave Interface

Real Time Clock Yes

Timers

W atchdog/Supervisor Yes

Slave port allows the RCM4200 to be used as an intelligent peripheral device slaved to a master processor

Ten 8-bit timers (6 cascadable from the first),

one 10-bit timer with 2 match registers, and

one 16-bit timer with 4 ou tputs and 8 set /reset registers

• 3 channels synchronized PWM

with 10-bit counter

Pulse-Wi dth Modulators

Input Capture

Quadrature Decoder

Power (pins unloaded)

• 3 channels variable-phase or syn-

chronized PWM with 16-bit counter

2 input capture channels can be used to time input signals from various port pins

1 quadrature decoder channel accepts inputs from external incremental encoder modules

3.0–3.6 V DC, 240 mA (typ.) @ 3.3 V, 275 mA @ 3.6 V and 85°C (max.)

• 4 channels synchronized PWM

with 10-bit counter

• 4 channels variable-phase or syn-

chronized PWM with 16-bit counter

2 quadrature decoder channels accept inputs from external incremental encoder modules

3.0–3.6 V DC, 200 (typ.) mA @ 3.3 V, 225 mA @ 3.6 V and 85°C (max.)

Operating Temperature -40°C to +85°C Humidity 5% to 95%, noncondensing

Connectors

Board Size

One 2 × 25, 1.27 mm pitch IDC signal header

One 2 × 5, 1.27 mm pitch IDC programming header

1.84" × 2.42" × 0.84"

(47 mm × 61 mm × 21 mm)

User’s Manual 91

A.1.1 A/D Converter

Table A-2 shows some of the important A/D converter specifications. For more details, refer to the ADC7870 data sheet.

Table A-2. A/D Converter Specifications

Parameter Test Conditions Typ Max

Analog Input Characteristics

Input Capa citance Input Impedance

Common-Mode Differential Mode

Static Accuracy

Resolution

Single-Ended Mode

Differential Mode Integral Linearity Differential Linearity

Dynamic Characteristics

Throughput Rate 52 ksamples/s

Voltage Reference

Accuracy Buffer Amp Source Current Buffer Amp Sink Current Short-Circuit Current

= 2.048 V and 2.5 V

ref

4 – 9.7 pF

6 MΩ 7 MΩ

11 bits 12 bits

±1 LSB

±0.5 LSB

±0.05%

20 mA

200 µA

20 mA

±2.5 LSB

±0.25%

92 RabbitCore RCM4200

A.1.2 Headers

The RCM4200 uses a header at J2 for physical connection to other boards. J2 is a 2 × 25 SMT header with a 1.27 mm pin spacing. J1, the programming port, is a 2 × 5 header with a 1.27 mm pin spacing.

Figure A-3 shows the layout of another board for the RCM4200 to be plugged into. These reference design values are relative to one of the mounting holes.

RCM4200 Series Footprint

0.016

(0.4)

0.050

0.91

(23)

sq.

(1.27)

0.19

(5)

0.875

(22.2)

0.284

0.334

(7.2)

(8.5)

Figure A-3. User Board Footprint for RCM4200

0.72

(18)

0.62

(16)

User’s Manual 93

A.2 Rabbit 4000 DC Characteristics

Table A-3. Rabbit 4000 Absolute Maximum Ratings

Symbol Parameter Maximum Rating

VDD

Operating Temperature -40° to +85°C

Storage Temperature -55° to +125°C

Maximum Input Voltage

Maximum Operating Voltage 3.6 V

VDD

+ 0.3 V

(max. 3.6 V)

Stresses beyond those listed in Table A-3 may cause permanent damage. The ratings are stress ratings only, and functional operation of the Rabbit 4000 chip at these or any other conditions beyond those indicated in this section is not implied. Exposure to the absolute maximum rating conditions for extended periods may affect the reliability of the Rabbit 4000 chip.

Table A-4 outlines the DC characteristics for the Rabbit 4000 at 3.3 V over the recommended operating temperature range from T

Table A-4. 3.3 Volt DC Characteristics

Symbol Parameter Min Typ Max

VDD

I/O Ring Supply Voltage, 3.3 V 3.0 V 3.3 V 3.6 V

I/O Ring Supply Voltage, 1.8 V 1.65 V 1.8 V 1.90 V

= –40°C to +85°C, VDDIO = 3.0 V to 3.6 V.

DRIVE

94 RabbitCore RCM4200

High-Level Input Voltage

(VDD

= 3.3 V)

Low-Level Input Voltage

(VDD

= 3.3 V)

High-Level Output Voltage

(VDD

= 3.3 V)

Low-Level Output Voltage

(VDD I/O Ring Current @ 29.4912 MHz,

3.3 V, 25°C

= 3.3 V)

All other I/O (except TXD+, TXDD+, TXD-, TXDD-)

2.0 V

0.8 V

2.4 V

0.4 V

12.2 mA

8 mA

Rabbit RabbitCore RCM4200 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

TABLE OF CONTENTS

1. INTRODUCTION

1.1 RCM4200 Features

1.2 Advantages of the RCM4200

1.3 Development and Evaluation Tools

1.3.1 RCM4200 Development Kit

1.3.2 Software

1.3.3 Online Documentation

2. GETTING S TARTED

2.1 Install Dynamic C

2.2 Hardware Connections

2.2.1 Step 1 — Prepare the Prototyping Board for Development

2.2.3 Step 3 — Connect Programming Cable

2.2.4 Step 4 — Connect Power

2.3 Run a Sample Program

2.3.1 Troubleshooting

2.4 Where Do I Go From Here?

2.4.1 Technical Support

3. RUNNING SAMPLE PROGRAMS

3.1 Introduction

3.2 Sample Programs

3.2.1 Use of Serial Flash

3.2.2 Serial Co mmunication

3.2.3 A/D Converter Inputs (RCM4200 only)

3.2.4 Real-Time Clock

4. HARDWARE REFERENCE

4.1 RCM4200 Digital Inputs and Outputs

4.1.1 Memory I/O Interface

4.1.2 Other Inputs and Outputs

4.2 Serial Communication

4.2.1 Serial Ports

4.2.2 Ethernet Port

4.2.3 Programming Port

4.3 Programming Cable

4.3.1 Changing Between Program Mode and Run Mode

4.3.2 Standalone Operation of the RCM4200

4.4 A/D Converter (RCM4200 only)

4.4.1 A/D Converter Power Supply

4.5 Other Hardware

4.5.1 Clock Doubler

4.5.2 Spectrum Spreader

4.6 Memory

4.6.1 SRAM

4.6.2 Flash EPROM

4.6.3 Serial Flash

5. SOFTWARE REFERENCE

5.1 More About Dynamic C

5.2 Dynamic C Function Calls

5.2.1 Digital I/O

5.2.2 Serial Co mmunication Drive rs

5.2.3 User Block

5.2.4 SRAM Use

5.2.5 RCM4200 Cloning

5.2.6 Serial Flash Drivers

5.2.7 Prototyping Board Function Calls

5.2.8 Analog Inputs (RCM4200 only)

5.3 Upgrading Dynamic C

5.3.1 Add-On Modules

6. USING THE TCP/IP FEATURES

6.1 TCP/IP Connections

6.2 TCP/IP Primer on IP Addresses

6.2.1 IP Addresses Explained

6.2.2 How IP Addresses are Used

6.2.3 Dynamically Assigned Internet Addresses

6.3 Placing Your Device on the Network

6.4 Running TCP/IP Sample Programs

6.4.1 How to Set IP Addresses in the Sample Programs

6.4.2 How to Set Up your Computer for Direct Connect

6.5 Run the PINGME.C Sample Program

6.6 Running Additional Sample Programs With Direct Connect

6.7 Where Do I Go From Here?

APPENDIX A. RCM4200 SPECIFICATIONS

A.1 Electrical and Mechanical Characteristics

A.1.1 A/D Converter

A.1.2 Headers

A.2 Rabbit 4000 DC Characteristics