Olimex PIC-WEB User guide

PIC-WEB revision C development board

User's Manual

All boards produced by Olimex are ROHS compliant

Document revision D, April 2014

Copyright(c) 2014, OLIMEX Ltd, All rights reserved

Page 1 of 36

INTRODUCTION

PIC-WEB is a compact (65x60 mm) board which is supported by Microchip’s
open source TCP-IP stack AN833. The board is designed with 64-pin high-performance, 1
Mbit Flash microcontroller with Ethernet - PIC18F67J60 and supports: SLIP, ARP, IP,
ICMP, TCP, UDP, HTTP, DHCP, FTP. The Microchip stack is written very modular and
flexible and you can enable or disable modules and supports dynamic web pages which give
you the possibility to control all PIC resources remotely via FTP, HTTP, UDP, TCP etc.
With this board you can implement web and ftp server, send e-mails and almost everything
what the big servers do. The on board 1Mbit serial flash is available for data storage.

This board is designed to have Web page of no more than 128 kB. If you want a lot
of images in your application you can also host them on other server visible on the network
where you have the PIC-WEB connected. The potential of the board is to generate a fluid
communication between some specific sensors or actuators across a TCP/IP net including
the controls of it.

The Microchip stack is an open source library, which is possible to modify and
compile at any time. But you will probably need to modify it to your own needs. The board
comes with an implemented WEB server and a web page that let you controls some of the
features of the board. In this manual we’ll learn about how to compile the TCP/IP stack to
use it over the platform, the needed software, how to use the pre loaded web page, and how
to upload your own web pages in the board.

This manual requires Microsoft Windows© OS because several software units used
here are Windows compatible only.

BOARD FEATURES

 PIC18F67J60 microcontroller

 1Mbit on board serial flash for web pages storage

 ICSP/ICD mini connector for programming and debugging with PIC-ICD2, PIC-

ICD2-POCKET and PIC-ICD2-TINY.

 Reset button

 User event button

 Analogue trimmer potentiometer

 Thermistor for temperature monitoring

 RS232 driver and connector

 Complete web server and TCP-IP stack support as per Microchip's open source

TCP-IP stack

 Power plug-in jack for +9 to +12 VDC power supply

 Voltage regulator +3.3V and filtering capacitors

 status LED

 UEXT connector

 Extension header to connect to other boards

 PCB: FR-4, 1.5 mm (0,062"), solder mask, silkscreen component print

 Dimensions (60x65)mm ~ (2.36x2.55)"

Page 2 of 36

ELECTROSTATIC WARNING

The PIC-WEB board is shipped in protective anti-static packaging. The board must not be
subject to high electrostatic potentials. General practice for working with static sensitive
devices should be applied when working with this board.

BOARD USE REQUIREMENTS

Cables: Depends on the used programming/debugging tool. It could be 1.8 meter USB A-B
cable to connect PIC-ICD2, PIC-ICD2-POCKET or PIC-KIT3 to USB host on PC or Serial
DB9 cable in case of PIC-ICD2-TINY or other programming/debugging tools. You will
need a serial cable if not for programming, than for configuring the board. You will also
need a Crossover Ethernet cable.

Note: PIC-KIT3 is recommended for new designs since PIC-ICD2 programmers are not
supported in Microchip's MPLAB X IDE. If you don't mind using MPLAB 8.xx then PIC­ICD2 is also a good choice.

Hardware: Programmer/Debugger – most of Olimex programmers are applicable, for
example PIC-ICD2, PIC-ICD2-POCKET, PIC-ICD2-TINY, PIC-Kit3 or other
compatible programming/debugging tool.

For programming PIC-WEB Rev. C, you will also need PIC-ICSP connector.

!!!Warning!!! When you want to program this microcontroller with PIC-ICD2, PIC-ICD2­POCKET or PIC-ICD2-TINY, before connecting the programmer to your target board, you
should first connect the programmer to your computer and open MPLAB. There, first from
menu Configure – Select Device – choose the microcontroller you are about to program,
then from menu Programmer – Select Programmer – choose MPLAB ICD 2, wait while
MPLAB is downloading operation system, and after ICD2 is connected – check in menu
Programmer – Settings – Power – there is option – Power target circuit from MPLAB ICD 2
– this option should be forbidden, you could not select it. Now it is safe to connect the
programmer to your target board.

Software: PIC-WEB is tested with MPLAB IDE v.8.92 + C18 compiler 3.44 Free
Standart EVAL Version. The latest modified stack version we tested the board with is

TCP/IP stack 5.42 (www.microchip.com). It is possible that the stack might not function
properly if used with later versions of MPLAB IDE. You will also need a terminal program
configured at 19 200 bps, 8N1 and XON/XOFF flow control (it's described below).

Page 3 of 36

PROCESSOR FEATURES

PIC-WEB board uses CPU PIC18F67J60 from Microchip with these features:

 Operating Frequency – DC – 41.67 MHz

 Flash program memory (bytes) – 128k

 Flash program memory (Instructions) – 65532

 SRAM data memory (bytes) – 3808

 Interrupt Sources – 26

 Ethernet TX/RX Buffer (bytes) – 8192

 I/O Ports – A, B, C, D, E, F, G

 I/O Pins – 39

 10-Bit A/D (ch) – 11

 Capture/Compare/PWM Modules – 2

 Enhanced Capture/Compare/PWM Modules – 3

 Serial Communications – MSSP (1), Enhanced USART (1)

 SPI

 Master I2C™

 Comparators – 2

 Timers 8/16-Bit – 2/3

 Resets (and Delays) - POR, BOR, RESET Instruction, Stack Full, Stack Underflow,

MCLR , WDT (PWRT, OST)

 Instruction Set – 75 Instructions, 83 with Extended Instruction Set Enabled

Ethernet Features:

 IEEE 802.3 compatible Ethernet Controller

 Integrated MAC and 10Base-T PHY

 8-Kbyte Transmit/Receive Packet Buffer SRAM

 Supports one 10Base-T Port with Automatic Polarity Detection and Correction

 Programmable Automatic Retransmit on Collision

 Programmable Padding and CRC Generation

 Programmable Automatic Rejection of Erroneous Packets

 Activity Outputs for 2 LED Indicators

 Buffer:

 Configurable transmit/receive buffer size

 Hardware-managed circular receive FIFO

 Byte-wide random and sequential access

 Internal DMA for fast memory copying

 Hardware assisted checksum calculation for various protocols

Page 4 of 36

 MAC:

 Support for Unicast, Multicast and Broadcast packets

 Programmable Pattern Match of up to 64 bytes within packet at user-defined

offset

 Programmable wake-up on multiple packet formats

 PHY:

 Wave shaping output filter

 Loopback mode

Flexible Oscillator Structure:

 Selectable System Clock derived from single 25 MHz external source:

 2.78 to 41.67 MHz

 Internal 31 kHz Oscillator

 Secondary Oscillator using Timer1 @ 32 kHz

 Fail-Safe Clock Monitor:

 Allows for safe shutdown if oscillator stops

 Two-Speed Oscillator Start-up

Peripheral Highlights:

 High-Current Sink/Source: 25 mA/25 mA on PORTB and PORTC

 Five Timer modules (Timer0 to Timer4)

 Four External Interrupt pins

 Two Capture/Compare/PWM (CCP) modules

 Three Enhanced Capture/Compare/PWM (ECCP) modules:

 One, two or four PWM outputs

 Selectable polarity

 Programmable dead time

 Auto-shutdown and auto-restart

 Up to two Master Synchronous Serial Port (MSSP) modules supporting SPI (all 4

modes) and I2C™ Master and Slave modes

 Up to two Enhanced USART modules:

 Supports RS-485, RS-232 and LIN 1.2

 Auto-wake-up on Start bit

 Auto-Baud Detect

 10-Bit, up to 16-Channel Analog-to-Digital Converter module (A/D):

 Auto-acquisition capability

 Conversion available during Sleep

 Dual Analog Comparators with Input Multiplexing

Special Microcontroller Features:

 5.5V Tolerant Inputs (digital-only pins)

Page 5 of 36

 Low-Power, High-Speed CMOS Flash Technology:

 Self-reprogrammable under software control

 C compiler Optimized Architecture for re-entrant code

 Power Management Features:

 Run: CPU on, peripherals on

 Idle: CPU off, peripherals on

 Sleep: CPU off, peripherals off

 Priority Levels for Interrupts

 8x8 Single-Cycle Hardware Multiplier

 Extended Watchdog Timer (WDT):

 Programmable period from 4 ms to 134s

 Single-Supply 3.3V In-Circuit Serial Programming™ (ICSP™) via two pins

 In-Circuit Debug (ICD) with 3 Breakpoints via two pins

 Operating Voltage Range of 2.35V to 3.6V (3.14V to 3.45V using Ethernet module)

 On-Chip 2.5V Regulator

Page 6 of 36

BLOCK DIAGRAM

Page 7 of 36

MEMORY MAP of PIC18F67J60

Page 8 of 36

SCHEMATIC

PIC-WEB_rev_C

OLIMEX LTD, BULGARIA
https://www.olimex.com

3.3VA

3.3VA

3.3VA3.3VA

10K

T1157

470uF/16V

390pF

1000uF/6.3V/8mm/ESR

20pF

20pF

220n F

100nF 100nF 100nF

100nF 100nF

100nF

10uF/6.3V

100nF

10pF

10pF

100n F

100nF

100nF

100nF

100nF

100nF

100nF

100nF

100nF

100nF

100nF

1N5819

BH34S
BH34S
BH34S
BH34S

BH34S
BH34S
BH34S

BH34S

BH34S
BH34S
BH34S

BH34S
BH34S
BH34S

BH34S

BH34S

BH34S

BH34S

BH34S

BH34S

BH34S
BH34S
BH34S

BH34S
BH34S

BH34S
BH34S

BH34S

BH34S

BH34S

BH34S
BH34S

BH34S
BH34S

DB104(SMD)

WU06S

CL150uH/SW68

ferrite_bead

RJLD-043TC

red

YDJ-1136

RED

25MHz/5X3,2MM

3276 8/6p F

0.68

0.68

3K/1%

1.8K/1%

560

330 10K

1M

2k/1% 27 0/1%

330

560

49.9 /1%

49.9 /1%

180

180

49.9 /1%

49.9 /1%

10K

330 330

10K

200R

100K

4.7K 4.7K 33K

DB9_female

T1107A

open

open

TERMISTOR

MC34063AD_SMD_MBR

PIC18F67J60

MAX3232

AT45DB011

BH10S

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V3.3V

3.3V

3.3V

3.3V

3.3V 3.3V3.3V

#EE_ CS

#EE_ CS

AN_T EMP

AN_T EMP

AN_T RIM

AN_T RIM

BUT

BUT

CTS

LEDA

LEDA

LEDB

LEDB

PGC

PGC

PGD

PGD

RST

RST

RTS

RXD1

RXD1

RXD1

SCK

SCK

SCK

SCL

SCL

SDA

SDA

SDI

SDI

SDI

SDO

SDO

SDO

TPIN +

TPI N+

TPIN -

TPI N-

TPO UT+

TPO UT+

TPO UT-

TPO UT-

TXD1

TXD1

TXD1

UEXT_#CS

UEXT _#CS

VIN

VIN

1 2

3.3V_E

AN_TR

BUT

C1

C2

C3

C4

C5

C6

C7 C8 C9

C10 C11

C12

C13

C14

C15

C16

C17

C18

C19

C20

C21

C22

C23

C24

C25

C26

C27

D1

EXT-1
EXT-2
EXT-3
EXT-4

EXT-5
EXT-6
EXT-7

EXT-8

EXT-9
EXT-10
EXT-11

EXT-12
EXT-13
EXT-14

EXT-15

EXT-16

EXT-17

EXT-18

EXT-19

EXT-20

EXT-21
EXT-22
EXT-23

EXT-24
EXT-25

EXT-26
EXT-27

EXT-28

EXT-29

EXT-30

EXT-31
EXT-32

EXT-33
EXT-34

G1

1
2
3
4
5
6

ICSP

L1

L2

AG

AG

AY

AY

KG

KG

KY

KY

RCT

6

RD+

7

RD-

8

TCT

3

TD+

1

TD-

2

75 75

75 75

1nF/2 kV

1
4
5
2

3
7
8
6

GREEN

YELL OW

LAN

LED

PWR

PWR_LED

GND

GND_

Q1

Q2

R1

R2

R3

R4

R5

R6

R7 R8

R9

R10 R11

R12

R13

R14

R15

R16

R17

R18

R19

R20

R21 R22

R23

R24

R25

R26 R27 R28

1
2
3
4
5

6
7
8
9

RS232

RST

12

SCL_E

12

SDA_E

TEMP

DC

8

FB

5

IS

7

SC

1

SE

2

TC

3

VCC

6

VSS

4

U1

#MCLR

7

AVDD

19

AVSS

20

ENVREG

18

OSC1/CLKI

39

OSC2/CLKO

40

RA0/LEDA/AN0

24

RA1/LEDB/AN1

23

RA2/AN2/VREF-

22

RA3/AN3/VREF+

21

RA4/T0CKI

28

RA5/AN4

27

RB0/INT0/FLT0

3

RB1/INT1

4

RB2/INT2

5

RB3/INT3

6

RB4/KBI0

44

RB5/KBI1

43

RB6/KBI2/PGC

42

RB7/KBI3/PGD

37

RBIAS

53

RC0/T1OSO/T13CKI

30

RC1/T1OSI/ECCP2/P2A

29

RC2/ECCP1/P1A

33

RC3/SCK1/SCL1

34

RC4/SDI1/SDA1

35

RC5/SDO1

36

RC6/TX1/CK1

31

RC7/RX1/DT1

32

RD0/P1B

60

RD1/ECCP3/P3A

59

RD2/CCP4/P3D

58

RE0/P2D

2

RE1/P2C

1

RE2/P2B

64

RE3/P3C

63

RE4/P3B

62

RE5/P1C

61

RF1/AN6/C2OUT

17

RF2/AN7/C1OUT

16

RF3/AN8

15

RF4/AN9

14

RF5/AN10/CVREF

13

RF6/AN11

12

RF7/#SS1

11

RG4/CCP5/P1D

8

TPIN+

47

TPIN-

46

TPOUT+

51

TPOUT-

50

VDD

26

VDD1

38

VDD2

57

VDDCORE/VCAP

10

VDDPLL

54

VDDRX

48

VDDTX

49

VSS

9

VSS1

25

VSS2

41

VSS3

56

VSSPLL

55

VSSRX

45

VSSTX

52

U2

C1+

1

C1-

3

C2+

4

C2-

5

R1IN

13

R1OUT

12

R2IN

8

R2OUT

9

T1IN

11

T1OUT

14

T2IN

10

T2OUT

7

V+

2

V-

6

U3

15 16

GND VCC

U3PWR

/CS/

4

/RESET/

3

/WP/

5

GND

7

SCK

2

SI

1

SO

8

VCC

6

U4

1 2
3 4
5 6
7 8
9 10

UEXT

9-12VDC

+

+

+

RJ4 5 SIDE

1:1

1:1

GND

0R

BOARD LAYOUT

POWER SUPPLY CIRCUIT

PIC-WEB can take power from two sources:

- PWR_JACK where (9-12) VDC is applied by external power source.

- EXT-20 pin VIN with the same voltage range.

The board power consumption is: about 130 mA with all peripherals and MCU running at
full speed.

RESET CIRCUIT

PIC-WEB reset circuit is made with R8 (10k) pull-up, R7 (330R) serial resistor and RST
button.

Although on the schematic is made provision for external reset through EXT-16 pin. Manual
reset is possible by the RST button.

CLOCK CIRCUIT

Quartz crystal 25 MHz is connected to PIC18F67J60 clock in and clock out.

Quartz crystal 32.768 KHz is connected to PIC18F67J60 T1OSO and T1OSI pins for it’s
internal Real Time Clock.

Page 10 of 36

JUMPER DESCRIPTION

3.3V_E

When this jumper is closed, it enables 3.3V board power supply.
Default state is closed.

SCL_E

When this jumper is closed, it connects UEXT pin 5 (SCL) to UEXT pin 9 (SCK),
respectively PIC18F67J60 pin 2 (RE0/P2D) to PIC18F67J60 pin 34 (RC3/SCK1/SCL1).
Default state is opened.

SDA_E

When this jumper is closed, it connects UEXT pin 6 (SDA) to UEXT pin 7 (SDI),
respectively PIC18F67J60 pin 1 (RE1/P2C) to PIC18F67J60 pin 35 (RC4/SDI1/SDA1).
Default state is opened.

When jumpers SDA_E and SCL_E are opened, UEXT pin 5 (SCL) is connected only to
PIC18F67J60 pin 2 (RE0/P2D) and UEXT pin 6 (SDA) is connected only to IC18F67J60
pin 1 (RE1/P2C), so you have to use software I2C. If you want to use hardware
software, you have to close (short) jumpers SDA_E and SCL_E, but note that this will
short PIC18F67J60 pin 2 (RE0/P2D) to PIC18F67J60 pin 34 (RC3/SCK1/SCL1) and
PIC18F67J60 pin 1 (RE1/P2C) to PIC18F67J60 pin 35 (RC4/SDI1/SDA1).

INPUT/OUTPUT

One user button BUT – connected to PIC18F67J60 pin 3 (RB0/INT0/FLT0).

Reset button RST – connected to PIC18F67J60 pin 7 (#MKLR).

Status red LED connected to PIC18F67J60 pin 44 (RB4/KBI0).

Power supply red LED PWR – indicates that external power source is applied and
board power supply is applied.

One trimmer AN_TR is connected to PIC18F67J60 pin 15 (RF3/AN8).

Page 11 of 36