Microchip Technology dsPICDEM 1.1 Plus Development Board User guide

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dsPICDEM™ 1.1 Plus

Development Board

User’s Guide

Note the following details of the code protection feature on Microchip devices:

• Microchip products meet the specification contained in their particular Microchip Data Sheet.

• Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions.

• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property.

• Microchip is willing to work with the customer who is concerned about the integrity of their code.

• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip’s code protection feature may be a violation of the Digit al Millennium Copyright Act. If suc h a c t s allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.

Information contained in this publication regarding device applications and t he lik e is provided only for your convenience and may be su perseded by upda t es . It is y our responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life supp ort and/or safety ap plications is entir ely at the buyer’s risk, and the buyer agrees to defend, indemnify and hold harmless M icrochip from any and all dama ges, claims, suits, or expenses re sulting from such use. No licens es are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.

Trademarks

The Microchip name and logo, the Microchip logo, Accuron, dsPIC, K

EELOQ, microID, MPLAB, PIC, PICmicro, PICSTART,

PRO MATE, PowerSmart, rfPIC and SmartShunt are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

AmpLab, FilterLab, Migratable Memory, MXDEV, MXLAB, SEEVAL, SmartSensor and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A.

Analog-for-the-Digital Age, Application Maestro, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, Linear Active Thermistor, Mindi, MiWi, MPASM, MPLIB, MPLINK, PICkit, PICDEM, PICDEM.net, PICLAB, PICtail, PowerCal, PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartT el, Total Endurance, UNI/O, WiperLock and ZENA are trademarks of Microchip Technology I ncorporat ed in the U.S.A. and other countries.

SQTP is a service mark of Microchip Technology Incorporated in the U.S.A.

All other trademarks mentioned herein are property of their respective companies.

Printed on recycled paper.

Microchip received ISO/TS-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona, Gresham, Oregon and Mountain View, California. The Company’s quality system processes and procedures are for its

8-bit MCUs, KEELOQ

PIC microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified.

code hopping devices, Serial EEPROMs,

dsPICDEM™ 1.1 PLUS

DEVELOPMENT BOARD

USER’S GUIDE

Preface ........................................................................................................................... 1

Chapter 1. Introduction

1.1 Introduction .....................................................................................................9

1.2 Highlight s ......... ............. .. .. ........................... .. .. ........................... .. .. ................ 9

1.3 dsPICDEM™ 1.1 Plus DEVELOPMENT BOARD Kit ....................................9

1.4 dsPICDEM™ 1.1 Plus Development Board Features ..................................10

1.5 Supported Plug-In Modules ..........................................................................11

1.6 Running the dsPICDEM™ 1.1 Plus Demonstration Program ......................12

Chapter 2. Using dsPIC30F Devices

2.1 Introduction ...................................................................................................13

2.2 Highlight s ......... ............. .. .. ........................... .. .. ........................... .. .. .............. 13

2.3 Tutori al Ove rview .................. .. .. ........................... .. .. .................................... 13

2.4 Creating the Pro j e c t .......................................................................... ... .. ....... 14

2.5 Building the Code .........................................................................................19

2.6 Programming the Chip ................................................................................. 21

2.7 Debugging the Code ....................................................................................25

Chapter 3. dsPIC30F Demonstration Program Operation

3.1 Introduction ...................................................................................................29

3.2 Highlight s ......... ............. .. .. ........................... .. .. ........................... .. .. .............. 29

3.3 Demonstra tion Program Op e ra tion .... .. ........................................................ 2 9

3.4 Data and Control Flow ..................................................................................36

3.5 dsPIC30F Demonstration Performance Metrics ...........................................39

3.6 Board Self-Test Code Module Summary ...................... ...................... .. ........42

Chapter 4. Using dsPIC33F and PIC24H/24F Devices

4.1 Introduction ...................................................................................................43

4.2 Highlight s ......... ............. .. .. ........................... .. .. ........................... .. .. .............. 43

4.3 Tutorial Ov e r view ..... .. .......................... .. ........................... .. .. .............. .. ....... 43

4.4 Creating the Pro j e c t .......................................................................... ... .. ....... 44

4.5 Building the Code .........................................................................................49

4.6 Programming the Chip ................................................................................. 51

4.7 Debugging the Code ....................................................................................55

4.8 Additional Code Examples ................................................................... .. ......59

Chapter 5. dsPICDEM™ 1.1 Developmen t Ha rdwa re

5.1 dsPICDEM™ 1.1 Plus Development Board Hardware Overview .................61

dsPICDEM™ 1.1 Plus Development Board User’s Guide

Appendix A. Hardware Drawings and Schematics

A.1 Introduction ..................................................................................................67

A.2 Highlight s ................ .......................... ... .. .......................... ... .. ....................... 67

Appendix B. LCD Controller Specification

B.1 Overview .......... ........................................ .. .. ........................... .. .. ................. 75

B.2 LCD Controller Interface .............................................................................. 75

B.3 Commands ................................................................................................... 76

B.4 General Commands .....................................................................................78

B.5 Character commands ................................................................................... 79

B.6 Pixel comm a n ds ............................................................................... .. .. ........ 81

B.7 Column com mands ................ ..................................................... ... .. ............ 8 2

B.8 Example s ................ ........................................ .. ........................................ .. . 83

Index .............................................................................................................................85

Worldwide Sales and Service .....................................................................................88

dsPICDEM™ 1.1 PLUS

DEVELOPMENT BOARD

Preface

NOTICE TO CUSTOMERS

All documentation becomes dated, and this manual is no exception. Microchip tools and documentation are constantly evolving to meet customer needs, so some actual dialogs and/or tool descriptions may differ from those in this document. Please refer to our web site (www.microchip.com) to obtain the latest documentation available.

Documents are identified with a “DS” number. This number is located on the bottom of each page, in front of the page number. The numbering convention for the DS number is “DSXXXXXA”, where “XXXXX” is the document number and “A” is the revision level of the document.

For the most up-to-date information on development tools, see the MPLAB Select the Help menu, and then Topics to open a list of available on-line help files.

IDE on-line help.

INTRODUCTION

This chapter contains general information that will be useful to know before using the dsPICDEM™ 1.1 Plus Development Board. Items discussed in this chapter include:

• About This Guide

• Conventions Used in this Guide

• Warranty Registration

• Recommended Reading

• The Microchip Web Site

• Development Systems Customer Change Notification Service

• Customer Support

• Document Revision History

ABOUT THIS GUIDE

This document describes how to use the dsPICDEM™ 1.1 Plus Development Board as a development tool to emulate and debug firmware on a target board. The manual layout is as follows:

• Chapter 1: Introduction – This chapter introduces the dsPICDEM™ 1.1 Plus Development Board and provides a brief description of the hardware.

• Chapter 2: Using dsPIC30F Devices – This chapter goes through a basic step-by-step process for getting your dsPICDEM™ 1.1 Plus Development Board up and running with the MPLAB devices.

• Chapter 3: Demonstration Program Operation – This chapter presents a detailed description of the operational functionality of the sample code, which is preprogrammed into the dsPIC30F device.

In-Circuit Debugger 2 (ICD 2) using dsPIC30F

dsPICDEM™ 1.1 Plus Development Board User’s Guide

• Chapter 4. Using dsPIC33F/PIC24H Devices – This chapter goes through a basic step-by-step process for getting your dsPICDEM™ 1.1 Plus Development Board up and running with the MPLAB

• Chapter 5: dsPICDEM™ 1.1 Plus Development Board Hardware – This chapter presents the features of the dsPICDEM™ 1.1 Plus Development Board in more detail.

• Appendix A: Hardware Drawings and Schematics – This Appendix illustrates the dsPICDEM™ 1.1 Plus Development Board layout and hardware schematic diagrams.

• Appendix B: LCD Controller Specification – This section pr esent s the 1 22 x 32 Graphics LCD Controller Interface Specifications.

• Index – This section provides cross-reference listing of terms, features and sections of this document.

• Worldwide Sales and Service – A listing of Microchip sales and service locations and telephone numbers worldwide.

ICD 2 using dsPIC30F devices.

CONVENTIONS USED IN THIS GUIDE

This manual uses the following docum entat io n conven tion s:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic characters Referenced books MPLAB

Initial caps A window the Output window

Quotes A field name in a window or

Underlined, italic text with right angle bracket

Bold characters A dialog button Click OK

N‘Rnnnn A number in verilog format,

Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>

Courier New font:

Plain Courier New Sam ple source code #define START

Italic Courier New A variable argument file.o, where file can be

Square brackets [ ] Optional arguments mcc18 [options] file

Curly brackets and pipe character: { | }

Ellipses... Replaces r epeated text var_name [,

Preface

IDE User’s Guide

Emphasized text ...is the only comp ile r...

A dialog the Settings dialog A menu selection select Enable Programmer

“Save project before build”

dialog A menu path File>Save

A tab Click the Power tab

4‘b0010, 2‘hF1 where N is the tota l number of digits, R is th e radi x and n is a digit.

Filenames autoexec.bat File paths c:\mcc18\h Keywords _asm, _endasm, static Command-line options -Opa+, -Opa- Bit values 0, 1 Constants 0xFF, ‘A’

any valid filename

[options]

Choice of mutually exclusive arguments; an OR selection

Represents code supplied by user

errorlevel {0|1}

var_name...]

void main (void)

{ ...

}

dsPICDEM™ 1.1 Plus Development Board User’s Guide

WARRANTY REGISTRATION

Please complete the enclosed Warranty Registration Card and mail it promptly. Sending in the Warranty Registration Card entitles users to receive new product updates. Interim software releases are available at the Microchip web site.

Chapter 1. Introduction

1.1 INTRODUCTION

The dsPICDEM™ 1.1 Plus Development Board Kit serves as a development and evaluation tool for dsPIC30F/33F High Performance Digital Signal Controllers and PIC24H/24F PIC

1.2 HIGHLIGHTS

This chapter discusses:

• dsPICDEM™ 1.1 Plus Development Board Kit

• dsPICDEM™ 1.1 Plus Development Board Features

• Supported Plug-In Modules

• Running the

1.3 dsPICDEM™ 1.1 PLUS DEVELOPMENT BOA RD KIT

microcontrollers.

dsPICDEM™ 1.1 Demonstration Program

USER’S GUIDE

The dsPICDEM™ 1.1 Plus Development Board Kit contains the following items:

• The dsPICDEM™ 1.1 Plus Printed Circuit Board (Figure 1-1)

• Preprogrammed dsPIC30F6014A Plug-in Module (Figure 1-2)

• 9V DC Power Supply

• RS-232 Interface Cable

• dsPICDEM™ 1.1 Plus Development Board Kit CD containing demonstration programs

FIGURE 1-1: dsPICDEM™ 1.1 PLUS DEVELOPMENT BOARD

8 7

4 3

dsPICDEM™ 1.1 Plus Development Board User’s Guide

FIGURE 1-2: dsPIC30F6014A PLUG-IN MODULE

1.4 dsPICDEM™ 1.1 PLUS DEVEL OPMENT BOARD FEATURES

The dsPICDEM™ 1.1 Plus Development Board supports the following features:

Development Board Power

• Separate on-board +5V and +3.3V regulators for VDD and AVDD with direct input from 9V, AC/DC wall adapter

• 9V DC power source input jack for development board

• LED power-on indicator

MPLAB ICD 2 and MPLAB ICE 4000 Connections

• MPLAB ICD 2 programming connector

• Jumper J8 for selection of processor interfaced to the MPLAB ICD 2 Debugger/Programmer

• Emulation header for connection to MPLAB ICE 4000 Emulator

• Pad location for 80-pin TQFP dsPIC DSC device

Serial Communication Channels

• Two RS-232 communication channels

• 6-pin terminal block and configuration jumper for RS-485 and RS-422 communication on UART1 from the dsPIC DSC device

• Single CAN communication channel

Introduction

Voice Band Codec

• Si3000 Voice band Codec chip (U7)

• Jumper J9 for selection of Si3000 Codec mode (Master/Slave)

• Socket U6, optional clock oscillator for Si3000 Voice band Codec

• 4-pin header for the Codec Line In and Line Out

• One 3.5 mm phono jack for the Codec left and right speaker outputs

• One 3.5 mm phono jack for the Codec MIC input

• Codec reset push button switch

Analog

• Three 5 kΩ Potentiometers (RP1-RP3)

• Microchip TC1047A Thermal Sensor (U9)

• MCP41010 Digital Potentiometer (U8)

• MCP602 Operational Amplifiers configured as low-pass filters for temperature sensor and digital potentiometer (U10)

Device Clocking

• 7.3728 MHz crystal (X3) for dsPIC DSC device

• Socket U5, clock oscillator for dsPIC DSC device (alternate clock source, X3 removed)

• Pad for 32.768 kHz crystal (X2) and load caps

Miscellaneous

• Reset push button switch and jumper (J10) for resetting the PIC18F242 LCD controller or the dsPIC DSC device

• Four red LEDs (LED1-LED4)

• Four push button switches (SW1-SW4) for external input stimulus

• 122 x 32 dot addressable LCD

• PIC18F242 LCD controller

• 2 x 50 prototyping header for user hardware expansion (header not installed)

• Prototype area for user hardware

1.5 SUPPORTED PLUG-IN MODULES

The dsPICDEM™ 1.1 Plus Development Board supports these Plug-In Modules:

• dsPIC30F6014A 80L Plug-In Module (MA300014)

• dsPIC33FJ256GP710 100-to-80L Plug-In Module (MA330012)

dsPICDEM™ 1.1 Plus Development Board User’s Guide

1.6 RUNNING THE dsPICDEM™ 1.1 PLUS DEMONSTRATION PROGRAM

The dsPICDEM™ 1.1 Plus Development Board is supplied with a pre-loaded demonstration program that exercises principal CPU functions and peripheral options that interact with typical user application programs.

When you apply power to the dsPICDEM™ 1.1 Plus Development Board, the LCD menu displays these demonstration functions:

• Data Acquisition Display

• Digital Signal Processing (DSP) Operations

• Dual Tone Multi-Frequency (DTMF) Generation Switches SW2-SW4 select one of these three choices. Each choice offers a submenu,

which provides for additional options using switches SW1-SW4. Refer to Chapter 3. “dsPIC30F Demonstration Program Operation” for full details

on the demonstration code operation .

Chapter 2. Using dsPIC30F Devices

2.1 INTRODUCTION

This chapter is a self-paced tutorial to get you started using the dsPICDEM™ 1.1 Plus Development Board with dsPIC30F devices. The tutorial demonstrates the main features of MPLAB IDE Integrated Development Environment and the MPLAB ICD 2 In-Circuit Debugger as they are used with the dsPICDEM™ 1.1 Plus Development Board. Upon completing this tutorial, you should be able to:

• Create a project using the Project Wizard.

• Assemble and link the code and set the Configuration bits.

• Set up MPLAB IDE to use the MPLAB ICD 2 In-Circuit Debugger.

• Program the chip with the MPLAB ICD 2.

• View the code execution in program memory and source code.

• View registers in a Watch window.

• Set a breakpoint and make the code halt at a chosen location.

• Use the function keys to Reset, Run, Halt and Single Step the code.

dsPICDEM™ 1.1 PLUS

DEVELOPMENT BOARD

USER’S GUIDE

2.2 HIGHLIGHTS

Items discussed in this chapter include:

• Tutorial Overview

• Creating the Project

• Building the Code

• Programming the Chip

• Debugging the Code

2.3 TUTORIAL OVERVIEW

The tutorial program in Tut6014a.s (included with the CD-ROM) is written in assembly code. This program displays text on the LCD and flashes an LED. The source file is used with a linker script file (p30f6014a.gld) and an include file (p30f6014a.inc) to form a comple te proje ct. The tutoria l is a si mple pr oject th at uses a single source code file. More complex projects might use multiple assembler and compiler source files as well as library files and precompiled object files. For simplicity , this tutorial uses only one source file.

There are four steps to this tutorial:

1. Create a project in MPLAB IDE.

2. Assemble and link the code.

3. Program the chip with the MPLAB ICD 2.

4. Debug the code with the MPLAB ICD 2.

dsPICDEM™ 1.1 Plus Development Board User’s Guide

2.4 CREATING THE PROJECT

The first step is to create a project and a workspace in MPLAB IDE. Usually, you will have one project in one workspace.

Note: These instructions presume the use of MPLAB 7.20 or newer.

A project contains the files needed to build an application (source code, linker script files, etc.) along with their associations to various build tools and build options.

A workspace contains one or more projects and information on the selected device, debug tool and/or programmer, open windows and their location and other IDE configuration settings.

MPLAB IDE contains a Project Wizard to help create new projects. Before starting, create a folder for the project files for this tutorial (C:\Tutorial is assumed in the instructions that follow). From the dsPICDEM 1_1 Plus Development Board code\Tutorial Code folder on the dsPICDEM™ 1.1 Plus Development Kit CD, copy the Tut6014a.s file into the C:\Tutorial fold er.

Note: All files copied from the CD are read only. If the file needs to be edited, the

attributes will need to be changed.

2.4.1 Select a Device

1. Start MPLAB IDE.

2. Close any workspace that might be open (File>Close Workspace

3. From the Project

4. From the Welcome screen, click Next> to display the Project Wizard Step One dialog (see Figure 2-1).

FIGURE 2-1: PROJECT WIZARD, STEP 1, SELECT A DEVICE

menu, select Project Wizard.

Using dsPIC30F Devices

5. From the Device: pull-down list, select dsPIC30F6014A and click Next>. The

Project Wizard Step Two dialog displays (see Figure 2-2).

FIGURE 2-2: PROJECT WIZARD, STEP 2, SELECT LANGUAGE

TOOLSUITE

2.4.2 Select Language Toolsuite

1. From the Active Toolsuite: pull-down menu, select Microchip C30 Toolsuite.

This toolsuite includes the assembler and linker that will be used (the C Compiler is not used).

Note: Steps 2-4 are optional.

2. In the Toolsuite Contents block, select MPLAB ASM30 Assembler

(pic30-as.exe).

3. In the Location block, click Browse... and navigate to:

C:\Program Files\Microchip\MPLAB ASM30 Suite \bin\pic30-as.exe

4. With MPLAB LINK 30 Object Linker (pic30-Id.exe) selected in Toolsuite

Contents, click Browse... and navigate to:

C:\Program Files\Microchip\MPLAB ASM30 Suite \bin\pic30-id.exe

5. Click Next> to continue. The Project Wizard Step Three dialog displays

(see Figure 2-3).

Note: The tool locations for your environment may be different from those shown

in this tutorial.

dsPICDEM™ 1.1 Plus Development Board User’s Guide

FIGURE 2-3: PROJECT WIZARD, STEP 3, NAME YOUR PROJECT

2.4.3 Name Your Project

1. In the Project Name text box, type MyProject.

2. Click Browse... and navigate to C:\Tutorial to place your project in the Tutorial folder.

3. Click Next> to continue. The Project Wizard Step Four dialog displays (see Figure 2-4).

Using dsPIC30F Devices

FIGURE 2-4: PROJECT WIZARD, STEP 4, ADD FILES TO PROJECT

2.4.4 Add Files to Project

1. Locate the C:\Tutorial folder and select the Tut6014A.s file.

2. Click Add>> to include the file in the project.

3. Expand the C:\Program Files\Microchip\MPLAB ASM30 Suite\Sup-

port\gld folder and select the p30f6014A.gld file.

4. Click Add>> to include the file in the project. The project now has two files.

5. Click Next> to continue.

6. When the summary screen displays, click Finish. After the project wizard completes, the MPLAB IDE project window shows the

Tut6014A.s file in the Source Files folder and the p30f6014A.gld file in the Linker Scripts folder (see Figure 2-5).

FIGURE 2-5: MPLAB

IDE PROJECT WINDOW

dsPICDEM™ 1.1 Plus Development Board User’s Guide

A project and workspace has now been created in MPLAB IDE. MyProject.mcw is the workspace file and MyProject.mcp is the project file. Double click the Tut6014A.s file in the project window to open the file. MPLAB IDE should now look similar to Fi gu r e 2-6.

FIGURE 2-6: MPLAB

IDE WORKSPACE WINDOWS

2.5 BUILDING THE CODE

In this project, building the code consists of assembling the Tut6014A.s file to create an object file, Tut6014A.o, and then linking the object file to create the Tut6014A.hex and Tut6014A.cof output files. The .hex file contains the data necessary to program the device and the .cof file contains additional information that lets you debug at the source code level.

Before building, there are settings required to tell MPLAB IDE where to find the include files and to reserve space for the extra debug code when the MPLAB ICD 2 is used.

The following line is near the top of the Tut6014A.s file:

.include "p30f6014A.inc"

This line causes a standard include file to be used. Microchip provides these files with all the Special Function Register (SFR) labels already defined for convenience.

To build the code, select Build Option s>Project Options dialog displays, as shown in Figure 2-7.

FIGURE 2-7: BUILD OPTIONS

Using dsPIC30F Devices

from the Project> menu. The Build

Browse to the location of the assembler Include folder.

dsPICDEM™ 1.1 Plus Development Board User’s Guide

2.5.1 Identify Assembler Include Path

1. Select the General tab.

2. At the Assembler Include Path, $(AINDIR) box, click Browse... and navigate to:

C:\Program Files\Microchip\MPLAB ASM30 Suite\Support\Inc

This path tells MPLAB IDE where to find the Include files.

2.5.2 Link for ICD 2

1. Select the MPLAB LINK30 tab to view the linker settings (see Figure 2-8).

2. Check Link for ICD 2.

3. Click Apply, then click OK. The text box closes while the linker reserves space for the debug code used by the MPLAB ICD 2.

4. Click OK again to save these changes. The project is now ready to build.

FIGURE 2-8: MPLAB

LINK30 BUILD OPTIONS

Check Link for ICD2

Using dsPIC30F Devices

2.5.3 Build the Project

1. Select P r oj ect >B ui ld All.

2. Observe the progress of the build in the Output window (Figure 2-9).

3. When BUILD SUCCEEDED displays you are ready to program the device.

FIGURE 2-9: BUILD OUTPUT WINDOW

2.6 PROGRAMMING THE CHIP

The MPLAB ICD 2 In-Circuit Debugger can be used to program and debug the dsPIC30F6014A device in-circuit on the dsPICDEM™ 1.1 Plus Development Board.

Note: Before proceeding, make sure that the USB driver for the MPLAB ICD 2 has

been installed on your PC (see the “MPLAB DS51331) for more details regarding the installation of MPLAB ICD 2.

Status shows BUILD SUCCEEDED

ICD 2 User’s Guide”,

Use the following procedures to program the dsPIC30F6014A device.

2.6.1 Set Up the Device Configuration

1. Use the Configure>Configuration Bits menu to display the configuration settings.

2. Set up the Configuration bits as shown in Figure 2-10.

FIGURE 2-10: CONFIGURATION SETTINGS

dsPICDEM™ 1.1 Plus Development Board User’s Guide

The highlighted configuration settings may need to change to the these values: Primary Oscillator Mode: XT w/PLL 4x

Watchdog Timer: Disabled

2.6.2 Connect the MPLAB ICD 2 In-Circuit Debugger

1. Before set ting up the hardware, check that the following jumpers are in place: AVDD_JMP: On

J8: 33F PGD3/30F, 33F PGD3/30F J10: MCLR1 VDD_JMP: On

J21 On (5V) J22 On (5V)

2. Connect the MPLAB ICD 2 to the PC with the USB cable (see Figure 2-11).

3. Connect the MPLAB ICD 2 to the dsPICDEM™ 1.1 Plus Development Board with the short RJ-11 (telephone) cable.

4. Apply power to the board.

FIGURE 2-11: dsPICDEM™ 1.1 PLUS DEVELOPMENT BOARD

CONNECTED TO MPLAB

ICD 2 IN-CIRCUIT DEBUGGER

Using dsPIC30F Devices

2.6.3 Enable MPLAB ICD 2 Connection

1. From the Debugger menu, click Select Tool>MPLAB ICD 2 to designate the

MPLAB ICD 2 as the debug tool in MPLAB IDE.

2. From the Debugger

The MPLAB ICD 2 should report that it found the dsPIC30F6014A device, as shown in Figure 2-12.

Note: MPLAB IDE may need to download new firmware if this is the first time the

MPLAB ICD 2 is being used with a dsPIC30F device. Allow it to do so. If any errors are shown, double click the error message to get more information.

menu, select Connect to connect the debugger to the device.

FIGURE 2-12: ENABLING MPLAB

3. From the Debugger

menu, click Settings to display the MPLAB ICD Debugger

ICD 2

Status shows that target device has been found

settings.

4. Select the Program tab.

5. Check Allow ICD 2 to select memories and ranges, as shown in Figure 2-13.

This setting will speed up operations by programming only a small part of the total program memory.

dsPICDEM™ 1.1 Plus Development Board User’s Guide

FIGURE 2-13: SETTING PROGRAM MEMORY SIZE

Using dsPIC30F Devices

2.6.4 Program the dsPIC30F6014A Device

1. From the Debugger menu, select Program. The Output window (Figure 2-14)

displays the program steps as they occur.

2. Observe the process in the Output window. When “MPLAB ICD 2 Ready”

displays, the device is programmed and ready to run.

FIGURE 2-14: PROGRAMMING THE dsPIC30F6014A DEVICE

3. Use the Debugger>Reset

code. LED1 should start blinking and the LCD display should show the text in Figure 2-15.

FIGURE 2-15: TUTORIAL LCD DISPLAY

2.7 DEBUGGING THE CODE

The MPLAB ICD 2 In-Circuit Debugger can be used to run, halt and step the code. A breakpoint can be set to halt the program after the code has executed the instruction at the breakpoint. The contents of the RAM and registers can be viewed whenever the processor has been halted.

The MPLAB ICD 2 In-Circuit Debugger uses the following function keys to access the main debugging functions:

<F5> Halt <F6> Reset <F7> Single Step <F9> Run

In addition, there are more functions available by right clicking on a line of source code. The most important of these are “Set Breakpoint” and “Run to Cursor”.

menu to reset the code, then Debugger>Run to run the

DSPIC30F 16-BIT

DIGITAL SiGNAL

CONTROLLER

dsPICDEM™ 1.1 Plus Development Board User’s Guide

2.7.1 Display the Code

1. From the View menu, select Program Memory.

2. On the Program Memory window, select the Symbolic tab, as shown in Figure 2-16.

FIGURE 2-16: PROGRAM MEMORY WINDOW

3. Press <F5> to halt the processor and press <F6> to reset. The program memory now shows a green arrow pointing to the line of code at address 0, the reset location.

The instruction at this location is goto __reset. This code is added by the linker to make the program branch to the start of the code in the Tut6014A.s file. The code uses the __reset label at the start of the executable code and declares the label as global to have visibility outside the source file (see Example 2-1).

EXAMPLE 2-1: CODE START-UP

.global __reset .text

__reset: mov #__SP_init, W15

mov #__SPLIM_init, W0 mov W0, SPLIM

The linker also provides values for the __SP_init and __SPLIM_init constants to initialize the stack pointer (W15), since the linker determines what RAM is available for the stack.

Using dsPIC30F Devices

2.7.2 Step the Program

1. Press <F7> to single step the code. The green arrow now points to the code at

__reset in the Tut6014A.s source code as shown in Figure 2-17.

2. Right click the line of code mov w0,LATD and choose Run to Cursor

arrow then points to the line mov w0,TRISD, because it has executed the prior lines of code up to and including mov #0xFFF0,w0.

FIGURE 2-17: SOURCE CODE WINDOW

. The green

3. From the View

4. From the Add SFR pull-down list, display TRISD.

5. Click Add SFR to add the TRISD register to the Watch window.

6. Next, select PORTD from the pull-down list and click Add SFR.

7. Press <F7> a few times and watch the values of TRISD and PORTD SFRs

change.

FIGURE 2-18: WATCH WINDOW DISPLAY

Note: The value displayed for PORTD may be different on your system

depending on what load is on PORTD.

menu, select Watch to open a Watch window (Figure 2-18).

dsPICDEM™ 1.1 Plus Development Board User’s Guide

2.7.3 Set Breakpoint

1. To set a breakpoint, right click a code line and select Set Breakpoint from the pop-up menu.

Note: An alternate method is to simply double click the line. This feature may

need to be enabled using the Edit>Properties

As an example, find the following line of code and set a breakpoint on this line. WrtNextChr: btss flags, #0 A red stop sign should appear in the gutter (gray bar on the left) of the source

code window.

2. Press <F9> to run the code. The program halts on the instruction following the breakpoint as shown in Figure 2-19.

Note: The instruction on which the code halts could be elsewhere in the code if

the breakpoint was set on or immediately after a branch instruction. Refer to Section 12, “Important Notes”, in the Readme file for the MPLAB ICD 2.txt file located in the E:\MPLAB IDE\READMES directory for additional operational information.

FIGURE 2-19: SETTING BREAKPOINT

menu.

In this example, every time <F9> is pressed to run the code it sends one character to the display and stops at the breakpoint. After the first four spaces, the characters will start to appear on the LCD display.

dsPICDEM™ 1.1 PLUS

DEVELOPMENT BOARD

USER’S GUIDE

Chapter 3. dsPIC30F Demonstration Program Operation

3.1 INTRODUCTION

A dsPIC30F DSC device shipped with the dsPICDEM™ 1.1 Plus Development Board includes a pre-programmed demonstration program. This demonstration program exercises several of the dsPIC30F peripherals, such as the 12-bit Analog-to-Digital Converter (ADC) and Codec interface and several of the unique CPU features. This chapter discusses these examples and explains the functionality they demonstrate. For detailed information on the dsPICDEM™ 1.1 Plus Development Board hardware, refer to Chapter 5. “dsPICDEM™ 1.1 Development Hardware”.

3.2 HIGHLIGHTS

Items discussed in this chapter are:

• Demonstration Program Operat ion

• Data and Control Flow

• dsPIC30F Demonstration Performance Metrics

• Board Self-Test Code Module Summary

3.3 DEMONSTRATION PROGRAM OPERATION

The dsPIC30F device included with your dsPICDEM™ 1.1 Plus Development Board is programmed to automatically initiate the demonstration code when power is applied to the board. This code is divided into two separate modules:

• Demonstration code module

• Board self-test code module This chapter is mostly devoted to describing the demonstration program. The end of

the chapter includes a brief summary of the board self-test code module, which has been included on the CD as a library archive only. See 3.6 “Board Self-Test Code

Module Summary”.

3.3.1 Demonstration Code Module Summary

When power is applied to the dsPICDEM™ 1.1 Plus Development Board, the LCD displays the Demo Main Menu, as shown in Figure 3-1.

FIGURE 3-1: POWER-UP DISPLAY

dsPIC30F 16-BIT

DIGITAL SIGNAL

CONTROLLER

DEMO MAIN MENU – S1

From this menu, pressing switch SW1 displays the menu options for the demonstration program, as shown in Figure 3-2.

dsPICDEM™ 1.1 Plus Development Board User’s Guide

FIGURE 3-2: DEMO MENU OPTIONS

MENU OPTIONS DATA ACQ DISPLAY –S2 DSP OPERATIONS –S3 DTMF GENERATION –S4

From this menu you can choose one of three demonstration modes:

• Data Acquisition Display mode

• Digital Signal Processing (DSP) Operations mode

• Dual Tone Multi-Frequency (DTMF) Generation mode

3.3.1.1 DATA ACQUISITION DISPLAY MODE The Data Acquisition Display mode demonstrates the capability of the dsPIC30F

device to convert inputs from five different analog signal sources at varying sampling rates.

Data Acquisition mode is initiated by pressing switch SW2. Figure 3-3 shows the resulting display on the LCD.

FIGURE 3-3: DATA ACQUISITION DISPLAY

F = 1000HZ TEMP = +23DGC RP1 = 1.67V RP2 = 2.95V RP3 = 2.62V

MAIN – s1

This display shows the values of the following analog signal sources:

• Potentiometers RP1-RP3 The three potentiometers available on the dsPICDEM™ 1.1 Plus Development

Board, RP1, RP2 and RP3, are connected to analog input pins AN6, AN4 and AN5, respectively, on the dsPIC30F device.

• Temperature Sensor U9: T emperature sensor, TC1047A, is connected to the analog input pin, AN8, on the

dsPIC30F device.

• Frequency: A fundamental sine-wave signal is generated by stepping the MCP41010 digital

potentiometer (U8) output at an 8 kHz rate. The analyzed frequency is displayed on the LCD.

The 12-bit ADC on the dsPIC30F device is used to convert these analog input sources. T o estimate the frequency of the generated sine-wave signal, the program converts and

buffers 256 samples of the signal on pin AN3 and then performs a Fast-Fourier Transform (FFT) on the buffer. The ADC is interrupt driven to sample and convert at a 16 kHz rate for this operation. AN3 is converted on every alternate conversion, thus delivering an effective sampling rate of 8 kHz for the signal presented at AN3.

The program scans input pins AN4, AN5, AN6 and AN8 to sample and convert the values of the temperature sensor and potentiometer signals and delivers one sample of each of these signals to the LCD display.

dsPIC30F Demonstration Program Operation

Y ou can also display the data acquisition values on the communications HyperT erminal on your PC. Use a DB-9 cable to connect “J2 – PORT A” on the development board to the RS-232 serial port on the PC, as shown in Figure 3-4.

FIGURE 3-4: dsPICDEM™ 1.1 PLUS DEVELOPMENT BOARD TO PC

CONNECTION

Development Board

DB-9 Cable

After connecting the table, configure HyperTerminal for the port settings shown in Figure 3-5. HyperTerminal will show a composite display of the data acquisition values at an update rate of 1.14 seconds.

FIGURE 3-5: HYPERTERMINAL CONFIGURATION SETTINGS

RS-232 Port

To return to the Menu Options display after running the Data Acquisition demo, press switch SW1.

dsPICDEM™ 1.1 Plus Development Board User’s Guide

3.3.1.2 DSP OPERATIONS MODE

From the Menu Options display, pressing switch SW3 launches the DSP Operations demo, which displays the digital signal values shown in Figure 3-6. This display provides information on the various signal processing operations that are performed on the signal at analog input pin, AN3.

FIGURE 3-6: DSP OPERATIONS DISPLAY

F = 1000 BIN = 032 256 PT TFFT =018175CY I I R TFILT =028649CY

MAIN – s1 CHNGFILT – S2

The DSP operations display shows several parameters for a sampled sine-wave signal. A fundamental sine-wave signal is generated by stepping the MCP41010 digital potentiometer (U8) output at an 8 kHz rate. The output of the digital potentiometer is applied to a Low-Pass (LP) filter with a cutoff frequency of approximately 4 kHz. This LP filter removes the high-frequency components and yields a sine wave adequate for this demonstration. Five frequencies are developed and selected by varying potentiometer RP1, as shown in Table 3-1.

TABLE 3-1: FREQUENCIES VS. POTENTIOMETER SETTING

Potentiometer Setting Resulting Frequency

0 ≤ RP1 ≤ 1V 100 Hz 1 ≤ RP1 ≤ 2V 500 Hz 2 ≤ RP1 ≤ 3V 1000 Hz 3 ≤ RP1 ≤ 4V 1500 Hz 4 ≤ RP1 ≤ 5V 2000 Hz

The filtered output of the MCP41010 is routed to pin AN3/RB3, which is an input to the 12-bit ADC. The ADC collects 256 samples from the MCP41010 at an 8 kHz sample rate. These samples are optionally subjected to a digital filtering algorithm. The following three digital filtering options are provided and selected by switch SW2:

•None

• Infinite Impulse Response (IIR)

• Finite Impulse Response (FIR)

Subsequently, their spectral components are estimated. The frequency estimate of the signal on pin AN3/RB3 is displayed on the first row of the DSP Operations display.

dsPIC30F Demonstration Program Operation

Figure 3-7 depicts the flow of data from the time the analog input is converted by the dsPIC30F device to the time the frequency is estimated.

FIGURE 3-7: DSP OPERATIONS FLOW DIAGRAM

FILT

Generated Sine Wave

Low-Pass

Filter

x1(t) x2(t) x[n]

To display on LCD

ADC

12-bit, 8 kHz sampling

Magnitude

computation and

peak-frequency

detection

Bandpass

IIR/FIR filter

y[n]

256-point FFT

FFT T

FFT

Figure 3-8 shows the frequency response of the IIR filter implementation. The IIR filter is only employed for demonstrating filter operation.

FIGURE 3-8: FREQUENCY RESPONSE: IIR FILTER

dsPICDEM™ 1.1 Plus Development Board User’s Guide

Figure 3-9 shows the frequency response of the FIR filter implemented on the dsPIC30F. The FIR filter is only employed for demonstrating filter operation.

FIGURE 3-9: FREQUENCY RESPONSE: FIR FILTER

The signal frequency determined by analyzing the 256-point FFT and associated bin is displayed on the LCD. Cycle counts for the digital filters and FFT are displayed on the LCD.

To quit this demonstration and return to the main menu, press switch SW1.

3.3.1.3 DTMF GENERATION MODE

From the Me nu O pti ons disp lay, pressing sw it ch SW4 lau nche s th e DT MF Ge nera tio n demo and takes you to the DTMF operation menu (Figure 3-10).

FIGURE 3-10: DTMF TONE GENERATION MENU

DTMF TONE 0123456789

NEXT –s2 SELECT –s3 PLAY SEQ –s4 MAIN –s1

When this display is active, switches SW2-SW4 control tone generation, as shown in Table 3-2.

TABLE 3-2: DTMF TONE GENERATION CONTROLS

Switch Function

SW2 Moves blinking cursor to the next DTMF Tone digit SW3 Plays the DTMF tone associated with the digit selected by s2 SW4 Plays a predetermined sequence of ten DTMF tones

dsPIC30F Demonstration Program Operation

Each DTMF tone consists of two sinusoids: a high-frequency component and a lowfrequency component. In the DTMF tones implemented for this demonstration, the high-frequency component is at a level 8 dB lower than the low-frequency component.

You can listen to the generated tones by using either a headset or a passive speaker connected to the “SPKR OUT” jack (J17).

Note: For a passive speaker, use a Radio Shack Model # 40-1434 Fold-up Stereo

Speaker System or an equivalent device.

If you connected your PC for the Data Acquisition Display demo (see Section 3.3.1.1), you can use the <0>-<9> keys on the PC keyboard to select a DTMF tone.

To quit this demonstration and return to Menu Options, press switch SW1.

3.3.2 Demonstrated Features and Peripherals

The following two sections summarize the key dsPIC30F MCU, DSP and peripheral features implemented in this general purpose demonstration program.

3.3.2.1 dsPIC30F MCU/DSP FEATURES The demonstration program uses several unique dsPIC30F MCU/DSP features for

various processing functions, including:

• DSP Engine for FFT, FIR and IIR computations

- 40-bit accumulators with Saturation, Overflow and Rounding modes

- Multiply-and-Accumulate (MAC) class of DSP instructions

• Bit-Reversed Addressing for 256-point FFT input data in preparation for the FFT

“butterfly” computations

• Modulo Addressing for accessing arrays in a circular fashion for FIR filtering

- Two modulo buffers have been implemented, one each in X and Y data spaces.

• Hardware Loop instructions

- DO and REPEAT instructions provide minimal overhead when executing a block of instructions repetitively.

• Program Space Visibility (PSV)

- Large tables for FIR filter coefficients, sine tables etc., are stored in and accessed from program memory.

3.3.2.2 dsPIC30F DEMO PERIPHERALS The demonstration program also implements several dsPIC30F peripherals for various

tasks. These peripherals include:

• Timer1 – Configured as a 16-bit timer

• Timer2 – Configured as 16-bit timer with a 256:1 prescaler

• Timer3 – Configured as 16-bit timer with a 256:1 prescaler

• Timer4 and Timer5 – Configured as a 32-bit timer

• UART2 TX/RX – Used to transmit demo data to the PC and receive commands from the PC keyboard

• SPI 2 – Used to communicate to the 122 x 32 Addressable-Pixel LCD via the PIC18F242 LCD controller and MCP41010 digital potentiometer

• 12-bit ADC – Used to convert multiple analog signals, including temperature and sine-wave signals generated by the MCP41010 digital potentiometer through a low-pass filter

dsPICDEM™ 1.1 Plus Development Board User’s Guide

• Data Converter Interface – Interfaced to an external Si3000 voice band Codec for transmission of DTMF PCM signals

• INTx pins – Used for detecting switch SW1-SW4 inputs

• Hierarchical/Prioritized Interrupt Control with nesting enabled

3.4 DATA AND CONTROL FLOW

3.4.1 Power-up Sequence

The power-up peripheral initialization sequence is shown in Table 3-3.

TABLE 3-3: POWER-UP PERIPHERAL INITIALIZATION SEQUENCE

Seq Module or Function Initialization Process

1 Timer1 Configured to count to 125 µS, but not enabled. 2 Timer2 Configured to count to 1 second using a 256:1 prescaler

setting.

3 Timer3 Configured to count up to 1.14 seconds using the 256:1

prescaler setting.

4 Timer4 and Timer5 Configured to operate in the 32-bit Timer mode, but not

enabled until needed.

5 Interrupt Service

Routine (ISR)

6 UART2 Both the transmitter and receiver are configured for

7 SPI 2 Initially configured to operate in an interrupt-driven mode at

8 Data Converter

Interface (DCI)

9 Si3000 Configured for Slave mode. The Si3000 line and speaker

10 DCI Re-initialized to o per ate w ith all fou r bu f fe r s in inte rrup t-dri ven

1 1 External interrupt

pins INT1-INT4

12 12-bit ADC Configured to operate at 16000 Hz sampling rate and gener-

13 Interrupts Peripheral interrupts are configured. Nested interrupts are

Processing is enabled for Timer2 and Timer3.

interrupt-driven operation at 57600 baud.

CY/8 Hz (where FCY = 7.3728 MHz). The module communi-

cates at F LCD controller. When it is used to step the MCP41010, it operates in the 16-bit mode at FCY/32 Hz.

Configured for Master mode. Initially configured to use two of four buffers. T ransm its/rec eives in time slot 1 at the frame rate of 7200 Hz for configuring the Si3000 external voice band Codec.

ports are enabled. Signal attenuation is set to 0 dB. The ADC input from the Si3000 is atten uated by 34.5 dB and is not used in this demo.

mode for transmitting D TMF PCM wo rds to the Si3000 Codec. Configured to interrupt on the falling edge and used for

switches SW1-SW4, respectively.

ate an interrupt every 16 sample-convert sequences. The ADC samples channel AN3 (sine wave), AN4 (RP2), AN5 (RP3), AN6 (RP1) and AN8 (temperature sensor U9).

enabled.

CY/8 Hz in 8-bit mo de while displ aying resul ts on the

dsPIC30F Demonstration Program Operation

3.4.2 Main Loop Code Execution

The step-by-step Main Loop execution sequence is shown in Table 3-4.

TABLE 3-4: MAIN LOOP CODE EXECUTION SEQUENCE

Seq Program Task

1 12-bit ADC collects 256 samples from the digit al potentiomete r output on AN3 into

a RAM buffer. It also collects one sam ple ea ch f r om AN 4 (RP2), AN5 (RP3), AN6 (RP1) and AN8 (Temperature Sensor U9). All A/D conversions are performed in an interrupt-driven configuration.

2 Buffered data set is filtered using an IIR filter to remove line noise. The filter can

be changed to an FIR filter or no filter from the DSP menu options. The filtering operation is benchmarked using the Timer4/5 pair.

3 A complex in-place 256-point FFT is performed on the filtered data set, resulting

in complex frequency data (x + jy). This operation is benchmarked using the Timer4/5 pair.

4 Squared magnitude is computed for each frequency bin in an in-place fashion

5 The magnitude data is run through a routine that returns the frequency bin and

6 The magnitude of the largest element is compared against a threshold and

7 If a Timer3 count has expired, a software flag is set to inform the CPU that the

8 Any user choices entered via the switches SW1-SW4 are checked and the new

9 The changes are communicated to the PIC18F242 LCD controller via the SPI 2

10 In the special case of the DTMF menu, the main routi ne may al so kick off the DCI

+ y2).

magnitude of the largest element.

captured if it is greater than the threshold so that low-level noise does not show up as a frequency estimate. (Provides a simplified peak-detection algorithm.)

results recorded ma y no w be dis played. This ensures that the CPU refreshes the display buffers.

user selections are applied. May involve a change of display screen or some parameter displayed on the LCD.

module.

module operation when the user requests DTMF tone generation.

dsPICDEM™ 1.1 Plus Development Board User’s Guide

3.4.3 Interrupts Used in the Demo

3.4.3.1 EXTERNAL INTERRUPTS TO MAIN ROUTINE

External interrupts INT1-INT4 are controlled by switches SW1-SW4. These switches provide selection capabilities for the demo program. The most recent

switch presses are recorded in a variable within the interrupt routines. In the main routine, the variable is analyzed to determine what action is requested by the recent switch event.

3.4.3.2 DCI INTERRUPTS AND DTMF

The DCI module interrupts the CPU when all four TXBUF registers have been transmitted. The DCI is used to send out DTMF tones to the Codec. The tonal components are stored as sinusoid tables in program memory and accessed using Program Space Visibility (PSV).

The DCI ISR keeps track of the number of samples sent. The DTMF tones are transmitted by adhering to International Telecommunication Union (ITU-T) specifications. For example, the ON time for tones is greater than 40 mS and the OFF time is less than 23 mS. The actual values are 100 mS of ON time and 15 mS of OFF time. When playing a pre-recorded sequence of tones, a PAUSE time is added between successive tones. This time is equal to the ON time of the tone. Also, the high and low frequency of the DTMF tone are separated by 8 dB. The high frequencies are reduced in magnitude relative to the low frequencies by 8 dB.

3.4.3.3 UART RECEIVE INTERRUPTS

Single DTMF tones may also be played by entering numeric characters (0-9) on the PC keyboard during the HyperTerminal session. The UART receives this keyboard character, and a receiver interrupt communicates this data to the DCI to start a tone generation process.

3.4.3.4 UART TRANSMIT INTERRUPTS

Every 1.14 seconds, data is transmitted via the UART to the HyperTerminal session window. Four bytes are loaded at a time in the Transmitter Buffer registers. The term “data” refers to the following:

• Analog data such as RP1, RP2 and RP3

• Temperature sensor data

• FFT frequency and bin number of the sampled input sine-wave signal

• Cycle count information for the FFT, FIR or IIR algorithms

• Chosen Filter Type – IIR, FIR or None

3.4.3.5 SPI INTERRUPTS, DIGITAL POT AND THE LCD CONTROLLER

The SPI 2 module is used to perform two functions:

• When the demo code is waiting for the ADC to collect 256 samples of data on pin AN3, the SPI 2 module is used by the Timer1 ISR to transmit sine-wave samples to the MCP41010 every 125 microseconds at a data rate of 230 kHz.

• When code execution reaches the DSP stage (i.e., filtering, FFT etc.) the SPI 2 module is used to send data to the PIC18F242 LCD controller on the expansion board at a data rate of 921.6 KHz (F display. All 80 characters are refreshed by the SPI 2 module.

CY/8). The LCD has a 4 row x 20-character

dsPIC30F Demonstration Program Operation

3.4.3.6 TIMER1 Timer1 is a 16-b it t imer that us es th e instr ucti on cycl e as it s ti me base . It is co nfi gure d

to time out and generate an interrupt every 125 microseconds. The Timer1 Interrupt Service Routine (ISR) loads the SPI 2 buffer with a value from a sine table. The SPI 2 module is then used to transmit the sine sample to digital potentiometer MCP41010. The MCP41010 output is connected to pin AN3/RB3 of the dsPIC30F device.

3.4.3.7 TIMER2 LEDs 1-4 count upward in binary form from 0 through 15. The count rate is controlled

by the 16-bit Timer2 module, which expires every second as it is operated in a 256:1 prescale mode, with the instruction cycle being the count interval.

3.4.3.8 TIMER3 The Timer3 count is configured to expire every 1.14 seconds. In the Timer3 ISR, a

software flag is used to determine whether data needs to be updated to the PC via the UART2 module. Thus data is not transmitted to the PC all the time so that the data on the HyperTerminal window is legible. Data sent to the LCD, however, is refreshed continuously since it does not have a “scrolling” effect.

3.5 dsPIC30F DEMONSTRATION PERFORMANCE METRICS

The dsPIC30F performance metrics are primarily based upon acquisition and processing of the 256 discrete samples. The discrete samples are acquired by the ADC sampling of a sine-wave signal applied to analog channel input AN3.

The sine-wave signal is generated as a result of stepping the MCP41010 digital potentiometer at an 8 kHz rate with its output applied to a low-pass filter with a cutoff frequency of approximately 4 kHz.

This acquisition and processing sequence repeats in a continuous loop. Upon user command via the LCD menu system (or optionally from PC keys <0>-<9>),

DTMF tones are generated. During this time additional CPU MIPS are required. This demonstration was developed for the development board that is supplied with a

7.3728 MHz crystal. The dsPIC30F is programmed for the XTx4PLL mode of operation, effectively yielding 7.3728 MIPS. Additional MIPS are not required for this demo but could have been obtained by using the XTx8PLL and XTx16PLL modes of operation yielding 14.7456 and 29.4912 MIPS.

Note: The demo code as supplied has specific timing parameters derived from

the 7.3728 MHz crystal with the XTx4PLL mode. Changing the device time base will require modification of several time-specific parameters.

dsPICDEM™ 1.1 Plus Development Board User’s Guide

Following is a summary of the processing time for each of the main demo functions. The data is based upon a 256 sample size.

• Acquisition of 256 discrete sine-wave data points sampled at 8 kHz

- Total acquisition time = 32 mS (256/8000)

• FIR filtering – 72,734 instruction cycles for block processing 256 samples in a 273-tap band-pass filter

- 9.87 mS @ 7.3728 MIPS

• IIR filtering – 28,649 instruction cycles for block processing 256 samples in a 9-section bi-quad bandpass filter

- 3.89 mS @ 7.3728 MIPS

• 256-point complex FFT – 18,176 instruction cycles

- 2.47 mS @ 7.3728 MIPS

Note: Filtering and FFT operations may be interrupted by the DCI, Timer2 or

UART2 modules. The time metrics presented above account for the interrupt handler processing time from these interrupts.

• The interrupt-driven UART2 transmitter is triggered every 1.14 seconds by Timer3 to send out approximately 145 characters.

- At 57600 baud, transmission of 145 characters requires approximately 25 mS

• SPI 2 transmits 160 characters (80 control and 80 data) @ F F

CY = 7.3728 MHz) to the PIC18F242 LCD controller for LCD screen updates.

CY/8 Hz (where

3.5.1 Performance Metric Summary with FIR Filter

The overall CPU performance metric is calculated on how many complete processing cycles can be performed over a 1 second interval. In one second, the dsPIC30F spends the following amounts of time in each of the three major functions:

• FFT Computation:

- 22.55 x 256-point complex FFT s = 55.69 mS

• FIR Filter Computation:

- 22.55 x 273-tap FIR filters = 223 mS

Coefficients stored in program memory

• CPU Idle:

- Waiting for ADC data = 721 mS

The 22.55 multiplier used in the above computations is based upon how many times in one second 256 samples can be acquired and then processed by the FIR and FFT algorithms.

For example:

• 32 mS for acquisition of 256 samples

• 9.87 mS for FIR filtering

• 2.47 mS for 256-point FFT Adding these three major timing metrics results in 44.34 mS. Therefore, this

44.34 mS cycle is repeated 22.55 times in a 1 second interval. Total MIPS required = 2.1 MIPS out of available 7.3728 MIPS.

FIR filter specifications are listed in Table 3-5.

dsPIC30F Demonstration Program Operation

TABLE 3-5: FIR FILTER SPECIFICATIONS

Specification Value

FIR filter type BandPass

Kaiser Window – 273 coefficients Passband ripple 0.001 dB Stopband ripple 100 dB Passband cutoff frequencies 300 Hz and 3800 Hz Stopband cutoff frequencies 100 Hz and 3990 Hz Sampling frequency 8000 Hz

The filter coefficients and code were generated by the Digital Filter Design Tool.

3.5.2 Performance Metric Summary with IIR Filter

The following overall CPU performance metric is calculated on how many complete processing cycles can be performed over a 1 second interval.

• FFT Computation:

- 26 x 256-point complex FFTs = 64.2 mS

• IIR Filter Computation:

- 26 x 9 second order elliptic section IIR filters = 101 mS Coefficients stored in program memory

• CPU Idle:

- Waiting for ADC data = 834 mS

The 26 multiplier used in the above computations is based upon how many times in one second 256 samples can be acquired and then processed by the IIR and FFT algorithms.

For example:

• 32 mS for acquisition of 256 samples

• 3.89 mS for IIR filtering

• 2.47 mS for 256-point FFT Adding these three major timing metrics results in 38.3 mS. Therefore, this

38.3 mS cycle is repeated approximately 26 times in a 1 second interval. Total MIPS required = 1.22 MIPS out of available 7.3728 MIPS.

IIR filter specifications are listed in Table 3-6.

TABLE 3-6: IIR FILTER SPECIFICATIONS

Specification Value

IIR filter type Bandpass, Elliptic, 9 Second Order Sections Passband ripple 0.001 dB Stopband ripple 100 dB Passband cutoff frequencies 200 Hz and 3850 Hz Stopband cutoff frequencies 100 Hz and 3990 Hz Sampling frequency 8000 Hz

The filter coefficients and code were generated by the Digital Filter Design Tool.

dsPICDEM™ 1.1 Plus Development Board User’s Guide

3.6 BOARD SELF-TEST CODE MODULE SUMMARY

The Board Self-Test Code module can be used to check that peripheral elements used by the main demonstration program are operating correctly.

To run this code module:

1. Apply power to the dsPICDEM™ 1.1 Plus Development Board,

2. Press and hold down switch SW1 while pressing and releasing the Reset switch.

3. Release SW1. At this point, the dsPIC DSC device enters into a basic test code execution loop while

displaying the test code results on the LCD. The following data is displayed on the LCD:

• RP1-RP3 – As the potentiometers are rotated through their range, the displayed value will vary from 0 to 0FFF.

• When SW1-SW4 are depressed, LED1-LED4 should light, respectively.

• At 25°C/77°F, the temperature sensor will yield a count of approximately 26x-27x. Touching U9 (TC1047A temperature sensor) should increase this count.

• A running counter is being sent to the Codec and read back when pins 2 and 3 of J12 are connected together. There is an attenuation factor and a large phase shift so the value will not be the same but the counter should be incrementing. (Jumper J9 must be configured for the Slave setting.)

• A running counter is sent to the MCP41010 digital potentiometer. The D POT value should be counting on the LCD.

When pin J2-3 is connected to J5-2 and pin J2-2 is connected to J5-3, “OK” will appear on the lower right corner of the screen at power-up.

dsPICDEM™ 1.1 PLUS

DEVELOPMENT BOARD

USER’S GUIDE

Chapter 4. Using dsPIC33F and PIC24H/24F Devices

4.1 INTRODUCTION

This chapter is a self-paced tutorial to help you get started using the dsPICDEM™ 1.1 Plus Development Board with dsPIC33F and PIC24H/24F devices. The tutorial demonstrates the main features of MPLAB IDE Integrated Development Environment and the MPLAB ICD 2 In-Circui t Debugge r as they are us ed with the dsPICDEM™ 1.1 Plus Development Board. Upon completing this tutorial, you should be able to:

• Create a project using the Project Wizard.

• Assemble and link the code and set the Configuration bits.

• Set up MPLAB IDE to use the MPLAB ICD 2 In-Circuit Debugger.

• Program the chip with the MPLAB ICD 2.

• View the code execution in program memory and source code.

• View registers in a Watch window.

• Set a breakpoint and make the code halt at a chosen location.

• Use the function keys to Reset, Run, Halt and Single Step the code.

4.2 HIGHLIGHTS

Items discussed in this chapter include:

• Tutorial Overview

• Creating the Project

• Building the Code

• Programming the Chip

• Debugging the Code

• Additional Code Examples

4.3 TUTORIAL OVERVIEW

The tutorial program in Tutorial.c displays text on the LCD and flashes an LED. The source file is used with a linker script file (p33FJ256GP710.gld) to form a complete project. The tutorial is a simple project that uses a single source code file. More complex projects might use multiple assembler and compiler source files as well as library files and precompiled object files. For simplicity, this tutorial uses only one source file.

There are four steps to this tutorial:

1. Create a project in MPLAB IDE.

2. Compile and link the code.

3. Program the chip with the MPLAB ICD 2.

4. Debug the code with the MPLAB ICD 2.

dsPICDEM™ 1.1 Plus Development Board User’s Guide

4.4 CREATING THE PROJECT

The first step is to create a project and a workspace in MPLAB IDE. Usually, you will have one project in one workspace.

Note: These instructions presume the use of MPLAB 7.31 or newer.

A project contains the files needed to build an application (source code, linker script files, etc.) along with their associations to various build tools and build options.

A workspace contains one or more projects and information on the selected device, debug tool and/or programmer, open windows and their location, and other IDE configuration settings.

MPLAB IDE contains a Project Wizard to help create new projects. Before starting, create a folder for the project files for this tutorial (C:\Tutorial is assumed in the instructions that follow). From the dsPICDEM 1_1 Plus Development Board code\Tutorial Code for dsPIC33FJ256GP710 folder on the dsPICDEM™ 1.1 Plus Development Kit CD, copy the Tutorial.c file into the C:\Tutorial folder.

Note: All files copied from the CD are read only. If the file needs to be edited, the

attributes will need to be changed.

4.4.1 Select a Device

1. Start MPLAB IDE.

2. Close any workspace that might be open (File>Close Workspace

3. From the Project

4. From the Welcome screen, click Next> to display the Project Wizard Step One

dialog (see Figure 4-1).

FIGURE 4-1: PROJECT WIZARD, STEP 1, SELECT A DEVICE

menu, select Project Wizard.

Using dsPIC33F and PIC24H/24F Devices

5. From the Device: pull-d own li st, selec t dsPIC33FJ256GP710 and click Next>. The Project Wizard Step Two dialog displays (see Figure 4-2).

FIGURE 4-2: PROJECT WIZARD, STEP 2, SELECT LANGUAGE

TOOLSUITE

4.4.2 Select Language Toolsuite

1. From the Active Toolsuite: pull-down menu, select Microchip C30 Toolsuite. This toolsuite includes the assembler and linker that will be used (the C Compiler is not used).

2. Click Next> to continue. The Project Wizard Step Three dialog displays (see Figure 4-3).

Note: The tool locations for your environment may be different from those shown

in this tutorial.

dsPICDEM™ 1.1 Plus Development Board User’s Guide

FIGURE 4-3: PROJECT WIZARD, STEP 3, NAME YOUR PROJECT

4.4.3 Name Your Project

1. In the Project Name text box, type MyProject.

2. Click Browse... and navigate to C:\Tutorial to place your project in the Tutorial folder.

3. Click Next> to continue. The Project Wizard Step Four dialog displays (see Figure 4-4).

Using dsPIC33F and PIC24H/24F Devices

FIGURE 4-4: PROJECT WIZARD, STEP 4, ADD FILES TO PROJECT

4.4.4 Add Files to Project

1. Locate the C:\Tutorial folder and select the Tutorial.c file.

2. Click Add>> to include the file in the project.

3. Expand the C:\Program Files\Microchip\MPLAB C30\Support\gld

folder and select the p33FJ256GP710.gld file.

4. Click Add>> to include the file in the project. There should now be two files in the

project.

5. Click Next> to continue.

6. When the summary screen displays, click Finish. After the project wizard completes, the MPLAB IDE project window shows the

Tutorial.c file in the Source Files folder and the p33FJ256GP710.gld file in the Linker Scripts folder (see Figure 4-5).

dsPICDEM™ 1.1 Plus Development Board User’s Guide

FIGURE 4-5: MPLAB® IDE PROJECT WINDOW

A project and workspace has now been created in MPLAB IDE. MyProject.mcw is the workspace file and MyProject.mcp is the project file. Double click the Tutorial.c file in the project window to open the file. MPLAB IDE should now look similar to Fi gu r e 4-6.

FIGURE 4-6: MPLAB

IDE WORKSPACE WINDOWS

Using dsPIC33F and PIC24H/24F Devices

4.5 BUILDING THE CODE

In this project, building the code consists of compiling the Tutorial.c file to create an object file, Tutorial.o, and then linking the object file to create the MyProject.hex and MyProject.cof output files. The .hex file contains the data necessary to program the device and the .cof file contains additional information that lets you debug at the source code level.

Before building, there are settings required to tell MPLAB IDE to reserve space for the extra debug code when the MPLAB ICD 2 is used.

4.5.1 Link for ICD 2

1. Select Build Options>Project from the Project menu.

2. Select the MPLAB LINK30 tab to view the linker settings (see Figure 4-7).

3. Check Link for ICD 2.

4. Click Apply, then click OK. The text box closes while the linker reserves space

for the debug code used by the MPLAB ICD 2.

5. Click OK again to save these changes. The project is now ready to build.

FIGURE 4-7: MPLAB

LINK30 BUILD OPTIONS

Check Link for ICD2

dsPICDEM™ 1.1 Plus Development Board User’s Guide

4.5.2 Build the Project

1. Select P r oj ect >B ui ld All.

2. Observe the progress of the build in the Output window (Figure 4-8).

3. When BUILD SUCCEEDED displays you are ready to program the device.

FIGURE 4-8: BUILD OUTPUT WINDOW

Status shows BUILD SUCCEEDED

Using dsPIC33F and PIC24H/24F Devices

4.6 PROGRAMMING THE CHIP

The MPLAB ICD 2 In-Circuit Debugger can be used to program and debug the dsPIC33FJ256GP710 device in-circuit on the dsPICDEM™ 1.1 Plus Development Board.

Note: Before proceeding, make sure that the USB driver for the MPLAB ICD 2 has

been installed on your PC (see the “MPLAB DS51331) for more details regarding the installation of MPLAB ICD 2.

Use the following procedures to program the dsPIC33FJ256GP710 device.

ICD 2 User’s Guide”,

4.6.1 Set Up the Device Configuration

1. Use the Configure>Configuration Bits menu to display the configuration settings.

2. Set up the Configuration bits as shown in Figure 4-9.

FIGURE 4-9: CONFIGURATION SETTINGS

4.6.2 Connect the MPLAB ICD 2 In-Circuit Debugger

1. Before set ting up the hardware, check that the fo llowing jumpers are in place:

AVDD_JMP: On J8: 33F PGD3/30F, 33F PGC3/30F J10: MCLR1 VDD_JMP: On

2. Reconfigure the board for 3.3V operation by removing jumpers J21 and J22.

3. Install the dsPIC33FJ256GP710 PIM into J11, J13, J14 and J15.

4. Connect the MPLAB ICD 2 to the PC with the USB cable (see Figure 4-10).

5. Connect the MPLAB ICD 2 to the dsPICDEM™ 1.1 Plus Development Board

with the short RJ-11 (telephone) cable.

6. Apply power to the board.

dsPICDEM™ 1.1 Plus Development Board User’s Guide

FIGURE 4-10: dsPICDEM™ 1.1 PLUS DEVELOPMENT BOARD

CONNECTED TO MPLAB

ICD 2 IN-CIRCUIT DEBUGGER

4.6.3 Enable MPLAB ICD 2 Connection

1. From the Debugger menu, click Select Tool>MPLAB ICD 2 to designate the MPLAB ICD 2 as the debug tool in MPLAB IDE.

2. From the Debugger The MPLAB ICD 2 should report that it found the dsPIC33FJ256GP710 device, as shown in Figure 4-11.

Note: MPLAB IDE may need to download new firmware if this is the first time the

MPLAB ICD 2 is being used with a dsPIC33F device. Allow it to do so. If any errors are shown, double click the error message to get more information.

menu, select Connect to connect the debugger to the device.

Using dsPIC33F and PIC24H/24F Devices

FIGURE 4-11: EN ABLING MPLAB® ICD 2

Status shows that target device has been found

3. From the Debugger

settings.

4. Select the Program tab.

5. Check Allow ICD 2 to select memories and ranges, as shown in Figure 4-12.

This setting will speed up operations by programming only a small part of the total program memory.

menu, click Settings to display the MPLAB ICD Debugger

dsPICDEM™ 1.1 Plus Development Board User’s Guide

FIGURE 4-12: SETTING PROGRAM MEMORY SIZE

Using dsPIC33F and PIC24H/24F Devices

4.6.4 Program the dsPIC33FJ256GP710 Device

1. From the Debugger menu, select Program. The Output window (Figure 4-13)

displays the program steps as they occur.

2. Observe the process in the Output window. When “MPLAB ICD 2 Ready”

displays, the device is programmed and ready to run.

FIGURE 4-13: PROGRAMMING THE dsPIC30F6014A DEVICE

3. Use the Debugger>Reset

code. LED1 should start blinking and the LCD display should show the text in Figure 4-14.

FIGURE 4-14: TUTORIAL LCD DISPLAY

4.7 DEBUGGING THE CODE

The MPLAB ICD 2 In-Circuit Debugger uses the following function keys to access the main debugging functions:

<F5> Halt <F6> Reset <F7> Single Step <F9> Run

In addition, there are more functions available by right clicking on a line of source code. The most important of these are “Set Breakpoint” and “Run to Cursor”.

menu to reset the code, then Debugger>Run to run the

DSPICDEM 1.1 Plus

DEVELOPMENT Board

TUTORIAL

dsPICDEM™ 1.1 Plus Development Board User’s Guide

4.7.1 Display the Code

1. From the View menu, select Program Memory.

2. On the Program Memory window, select the Symbolic tab, as shown in Figure 4-15.

FIGURE 4-15: PROGRAM MEMORY WINDOW

3. Press <F5> to halt the processor and press <F6> to reset. The program memory now shows a green arrow pointing to the line of code at address 0, the Reset location.

The instruction at this location is goto __reset. This code is added by the linker to make the program branch to the initialization and main code located in the tutorial.c file.

Using dsPIC33F and PIC24H/24F Devices

4.7.2 Step the Program

1. Press <F7> to single step the code. The green arrow now points to the code at

__reset, as shown in Figure 4-16.

2. Right click the line of code call main and choose Run to Cursor

arrow then points to the first instruction in the main routine.

FIGURE 4-16: SOURCE CODE WINDOW

. The green

3. From the View

4. From the Add SFR pull-down list, display PLLFBD.

5. Click Add SFR to add the PLLFBD register to the Watch window.

6. Next, select CLKDIV from the pull-down list and click Add SFR.

7. Press <F7> a few times and watch the values of these SFRs change.

FIGURE 4-17: WATCH WINDOW DISPLAY

menu, select Watch to open a Watch window (Figure 4-17).

dsPICDEM™ 1.1 Plus Development Board User’s Guide

4.7.3 Set Breakpoint

1. To set a breakpoint, right click a code line and select Set Breakpoint from the pop-up menu.

Note: An alternate method is to simply double click the line. This feature may

need to be enabled using the Edit>Properties

As an example, find the following line of code and set a breakpoint on this line.

ToggleLED();

A red stop sign should appear in the gutter (gray bar on the left) of the source code window.

2. Press <F9> to run the code. The program halts on the instruction following the breakpoint.

Note: The instruction on which the code halts could be elsewhere in the code if

menu.

Using dsPIC33F and PIC24H/24F Devices

4.8 ADDITIONAL CODE EXAMPLES

The dsPICDEM™ 1.1 Plus Development Board Kit CD contains additional code examples that exercise various features and peripherals of the dsPIC33F device:

CE111 – External Interrupt Pins:

Microchip's 16-bit dsPIC Digital Signal Controllers feature up to 5 external interrupt pins: INT0 through INT4. These pins may be configured to interrupt on either a rising or a falling edge of a signal.

This code example, written in C, demonstrates how the external interrupt pins can be configured to interrupt the CPU. Both initialization and interrupt service routines have been provided.

CE113 – Timer1 Used in Real-Time Clock Applications:

dsPIC Digital Signal Controllers feature several on-chip general purpose timers. Of these, the Timer1 module has the capability to be clocked by an external asynchronous 32 kHz crystal connected to the device via the SOSCI and SOSCO pins. The attached code example demonstrates how Timer1 may be configured to use the 32 kHz secondary oscillator for a real-time clock (RTC) application.

Configuring Timer1 for the real-time clock application is a two step process. In the first step, the code demonstrates how the secondary oscillator can be enabled via a special write sequence to the OSCCON register. In the second step, the code demonstrates how the Timer1 is configured to use an external asynchronous clock. In addition to these steps, the code also demonstrates Timer1 interrupt operation.

CE114 – UART Loopback:

In this code examples, 256 byte transmit buffer is transmitted using UART and received back in the receive buffer. This operation happens continuously.

CE121 – ADC Channel Scanning:

In this example, Timer 3 is set up to time-out every 125 microseconds (8 kHz rate). As a result, the module stops sampling and triggers an A/D conversion on every Timer3 time-out (i.e., Ts=125µs).

ADC is configured in 10-bit mode to sequentially scan AIN0, AIN1, AIN2, AIN3, AIN4 and AIN5 on Timer 3 interrupt. It takes six Timer3 time-out periods to scan through all the six analog inputs.

dsPICDEM™ 1.1 Plus Development Board User’s Guide

NOTES:

dsPICDEM™ 1.1 PLUS

DEVELOPMENT BOARD

USER’S GUIDE

Chapter 5. dsPICDEM™ 1.1 Development Hardware

5.1 dsPICDEM™ 1.1 PLUS DEVELOPMENT BOARD HARDWARE OVERVIEW

This chapter describes the dsPICDEM™ 1.1 Plus Development Board hardware. This development board features the hardware elements shown in Figure 5-1.

FIGURE 5-1: dsPICDEM™ 1.1 PLUS DEVELOPMENT BOARD

2221

1516 14 13 12

TABLE 5-1: dsPICDEM™ 1.1 PLUS DEVELOPMENT BOARD HARDWARE

No. Hardware E lement No. Hardwar e Element

1 ICD Connector (Section 5.1.10) 12 Stereo Jacks (Section 5.1.11) 2 CAN Port (Section 5.1.2) 13 Analog Potentiometers (Section 5.1.5) 3 Prototyping Area (Section 5.1.17) 14 LEDs (Section 5.1.7) 4 Oscillator X2 (Section 5.1.15) 15 Push Button Switches (Section 5.1.6) 5 Oscillator X3 (Section 5.1.15) 16 LCD Graphic Display (Section 5.1.9)

(1)

6 Emulation Headers 7 Si3000 External Clock Socket

(Section 5.1.11) 8 Si3000 Codec (Section 5.1.11) 19 V 9 Codec Reset Switch (Section 5.1.11) 20 Power-on LED (Section 5.1.14)

10 Temperature Sensor (Section 5.1.4) 21 RS-232 Serial Ports (Section 5.1.1)

11 AV

Note 1: See Plug-in Module shown in Figure 5-2.

DD Regulator (Section 5.1.13) 22 RS-485/RS-422 Port (Section 5.1.3)

(Section 5.1.12) 17 Reset Switch (Section 5.1.16)

18 Canned Crystal Socket

(Section 5.1.15)

DD Regulator (Section 5.1.13)

dsPICDEM™ 1.1 Plus Development Board User’s Guide

FIGURE 5-2: DEVICE PLUG-IN MODULE

Match the Pin 1 index marker of the device to the lower left 45° corner of the 80-pin QFP footprint (pin 1 of the Emulation Header).

5.1.1 RS-232 Serial Ports

Two RS-232 serial communication channels are provided on the dsPICDEM™ 1.1 Plus Development Board. One serial communication channel (DB9 connector J5/PORTB) can be configured as an RS-232 or RS-485/RS-422 communication channel by setting jumper J4 to the RX232/TX232 position. This jumper position connects the dsPIC DSC UART channel 1 U1RX and U1TX pins to an RS-232 level-shifting IC (U3).

The serial port is configured as Data Communication Equipment (DCE), and can be connected to a PC using a straight-through cable. If hardware handshaking is required, inserting jumper J3 will connect CTS and RTS to port pins RD4 and RD5 on the dsPIC DSC device. These pins can support CTS/RTS through a bit-bang control approach. Both pins are connected to IC U3.

Setting jumper J4 to the TX485/RX485 position configures the dsPIC DSC UART channel 1 U1RX and U1TX pins for a RS-485/RS-422 communication channel.

The second serial communication channel (DB9 connector J2/PORT A) is connected to the dsPIC DSC UART channel 2 U2RX and U2TX pins via RS-232 level-shifting IC (U1). This channel is a dedicated RS-232 serial communication channel. Hardware flow control is not provided.

The schematic of these ports is shown in Figure A-5: “dsPICDEM™ 1.1 Plus Devel-

opment Board Schematic (Sheet 4 of 5)”

5.1.2 CAN Port

The CAN RXD and TXD lines of the SN65HVD230DR are connected to the dsPIC DSC CANRX and CANTX pins. CAN bus signals (CANH and CANL) are available on DB9 connector J20. The CANH and CANL bus can be locally terminated with a 120 ohm resistor by inserting jumper, J18.

The schematic of the CAN port is shown in Figure A-5: “dsPICDEM™ 1.1 Plus Devel- opment Board Schematic (Sheet 4 of 5)”.

dsPICDEM™ 1.1 Development Hardware

5.1.3 RS-485/RS-422 Port

Signals for the RS-485/RS-422 port are available on the 6-pin terminal block labeled TB1. The terminal block can be reconfigured from RS-485 to RS-422 by removing the jumper on J7. Inserting jumper J6 will terminate the bus with a 120-ohm resistor.

The RX485 and TX485 lines of the MAX3491E can be tied to the dsPIC DSC UART channel 1 U1RX and U1TX pins by moving the jumper on J4 to the TX485/RX485 position.

MAX489E receiver and driver output enables are controlled by port pins RG0 and RG1, respectively.

The RS-485 and RS-422 port schematic is shown in Figure A-5: “dsPICDEM™ 1.1

Plus Development Board Schematic (Sheet 4 of 5)”.

5.1.4 Temperature Sensor

Temperature sensor U9 is a -40°C to +125°C linear output TC1047A connected to analog channel AN8 of the dsPIC DSC device. The output of the temperature sensor is fed through a second-order low-pass filter before connection to the dsPIC DSC device. The low-pass filter cutoff frequency is set at 10 Hz. The output voltage range for the TC1047A is typically 750 mV at +25°C. The TC1047A exhibits a typical 10 mV/C voltage slope.

The schematic of the temperature sensor is shown in Figure A-4: “dsPICDEM™ 1.1

Plus Development Board Schematic (Sheet 3 of 5)”.

5.1.5 Analog Potentiometers

Three 5 kOhm potentiometers are connected to analog channels AN4 (RB4), AN5 (RB5) and AN6 (RB6). The voltage output range for each potentiometer is between 0V DC and 5V DC. The voltage source is provided by VR2, which is a separate voltage source for all the analog components on the development board.

The schematic of the analog potentiometers is shown in Figure A-4: “dsPICDEM™

1.1 Plus Development Board Schematic (Sheet 3 of 5)”.

5.1.6 Push Button Switches

Switches SW1-SW4 are connected to port pins RA12-RA15, respectively, on the dsPIC DSC device. The signal lines are normally pulled up to +5V DC through 10 kOhm resistors. Pressing the switch will short the line to ground. Port pins RA12-RA15 are configured as the INT1-INT4 external interrupt pins.

The schematic of the push button switches is shown in Figure A-4: “dsPICDEM™ 1.1

Plus Development Board Schematic (Sheet 3 of 5)”.

5.1.7 LEDs

Four red LEDs, LED1-LED4, are connected to port pins RD0-RD3, respectively, on the dsPIC DSC device. The LED anodes are tied to V

The schematic of the LEDs is shown in Figure A-4: “dsPICDEM™ 1.1 Plus Develop- ment Board Schematic (Sheet 3 of 5)”.

DD through a 1.2 kOhm resistor.

dsPICDEM™ 1.1 Plus Development Board User’s Guide

5.1.8 Digital Potentiometer

A single channel digital potentiometer, MCP41010, is provided on the development board. Control of the digital potentiometer is via the dsPIC DSC SPI 2 communication channel. The output of the digital potentiometer is applied to a low-pass filter with a cutoff frequency of approximately 4 kHz. The output of the LP filter is connected to the analog channel AN3 of the dsPIC DSC device.

The schematic of the digital potentiometers is shown in Figure A-4: “dsPICDEM™ 1.1

Plus Development Board Schematic (Sheet 3 of 5)”.

5.1.9 LCD Graphic Display

The LCD graphic display is a PG12232D-L 8-bit 122 x 32 dot-matrix LCD controlled by a PIC18F242 LCD controller. The dsPIC30F device accesses the LCD controller via the SPI 2 port. For a detailed description of the communication protocol, see Appendix B. “LCD Controller Specification”.

The LCD PIC18F242 controller is reset by setting jumper J10 to the MCLR2 and pressing the Reset switch. Moving jumper J10 back to the MCLR1 Reset control of the dsPIC30F device.

The schematic of the analog potentiometers is shown in Figure A-6: “dsPICDEM™

1.1 Plus Development Board Schematic (Sheet 5 of 5)”.

position

position returns

5.1.10 ICD Connector

Using modular connector ICD, the MPLAB ICD 2 can be connected for low-cost programming and debugging of the dsPIC30F/33F or PIC24H/24F device.

• Programming and debugging of dsPIC30F devices requires that jumper J8 is set to the 30F position and jumper J10 is set to the MCLR1

• Programming and debugging of dsPIC33F/PIC24H/PIC24F devices requires that jumper J8 is set to the 33F PGC1 and 33F PGD1 (or to the 33F PGC3 and 33F PGD3) position and jumper J10 is set to the MCLR1

Programming the PIC18F242 LCD controller requires that jumper J8 is set to the RB6/242 and RB7/242 position and jumper J10 is set to the MCLR2 PIC18F242 LCD controller is programmed at the factory with the LCD driver code. Under normal operating conditions, no additional programming should be required for this device.

The schematic of the analog potentiometers is shown in Figure A-6: “dsPICDEM™

1.1 Plus Development Board Schematic (Sheet 5 of 5)”

position.

position. The

5.1.11 Si3000 Voice Band Codec

An Si3000 Codec from Silicon Labs is included on the development board. Stereo Jacks provide MIC input on J16 and SPKR OUT output on J17. LINE I/O on J12 provides line-in and line-out connections. J9 provides a selection for Master or Slave operation for the Si3000. When the Si3000 is operated in Master mode, the user must provide a suitable clock oscillator in the U6 socket. The CODEC RESET switch resets the Si3000.

For detailed operational information, refer to the Si3000 data sheet available on www.silabs.com. For a schematic of the Si3000 circuit, see Figure A-6: “dsPICDEM™

1.1 Plus Development Board Schematic (Sheet 5 of 5)”.

dsPICDEM™ 1.1 Development Hardware

5.1.12 Emulation Header

Headers J11 and J13-J15 provide a connection to the MPLAB ICE 4000 In-Circuit Emulator. The emulation headers also support Plug-in Modules containing dsPIC30F, dsPIC33F, PIC24H and PIC24F devices soldered onto adaptor boards (see Section 5.1.18). These Plug-in Modules facilitate quick change out of the 80-pin TQFP device.

The schematic of the Emulation Header is shown in Figure A-2: “dsPICDEM™ 1.1

Plus Development Board Schematic (Sheet 1 of 5)”.

5.1.13 Power Supply

The dsPICDEM™ 1.1 is powered by a +9V AC/DC wall adapter. Separate +3.3 V/+5V DC regulators (V prototyping area. Separate ground planes are connected through a single point.

Jumpers J21 and J22 are used to select +3.3V or +5V operation. An incorrect jumper setting can damage dsPIC30F/33F or PIC24H/24F Plug-In Modules. Configure for +5V operation with dsPIC30F devices only. Configure for +3.3V operation for all other devices.

DD and AVDD) are provided to their respective processor pins and

CAUTION

Jumpers VDD _JMP and AVDD_JMP allow th e sup plie d po wer sourc e to be by p asse d and alternate supplies to be provided.

The schematics of the power supply circuits are shown in Figure A-3: “dsPICDEM™

1.1 Plus Development Board Schematic (Sheet 2 of 5)”.

5.1.14 Power-on Indicator

A green LED is connected to the input of the regulators to indicate the presence of power. See Figure A-3: “dsPICDEM™ 1.1 Plus Developmen t Board Schemat ic

(Sheet 2 of 5)”.

5.1.15 Oscillator Options

• Crystal oscillator (7.3728 MHz) is supplied with the development board.

• Through holes and pads are provided for a user-furnished watch-type crystal and two capacitors for SOSC1 and SOSC2.

• Socket and pads are provided for an output pull-up resistor for user furnished oscillator to processor.

• External clock connections from J1.

dsPICDEM™ 1.1 Plus Development Board User’s Guide

Oscillator selection parameters are shown in Table 5-2.

TABLE 5-2: OSCILLATOR SELECTION PARAMETERS

Oscillator Selection on

dsPICDEM™ 1.1 Plus

Demo Board

Crystal (X3) R33, R34, R20, C20, C21 and X2 open, U5 empty.

Mini Crystal (X2) R20, R33, R34, C33, C37 and X1 open, U 5 empty.

Canned Osci llator (U5) R20, R33, R34, C20, C21, C33, C37, X2 and X3 open,

RC R33, R34, C20, C21, C33, X2 and X3 open, U5 empty.

External Clock R20, C20, C21, C33, C37, U5, X2 and X3 open. 0 ohm

Modifications on dsPICDEM™ 1.1 Plus Demo Board

Crystal in X3, caps in C33 and C37.

Crystal in X2, caps in C20 and C21.

U5 installed.

Cap in C37 and resistor in R20.

installed for R33 and R34.

Note 1: The oscillator circuit schematics are shown in Figure

A-2: “dsPICDEM™ 1.1 Plus Development Board Schematic (Sheet 1 of 5)”

5.1.16 Reset Switch

(1)

By placing J10 jumper in the MCLR1 position, the Reset switch connected to the processor MCLR jumper in the MCLR2

pin provides a hard Reset to the dsPIC DSC device. By placing J10

position, the Reset switch is connected to the PIC18F242 LCD

controller. The Reset switch circuit is shown in Figure A-2: “dsPICDEM™ 1.1 Plus Develop-

ment Board Schematic (Sheet 1 of 5)”.

5.1.17 Prototyping Area

A prototyping area and associated header are provided on the development board to enable additional ICs and attachment boards to be added (see Figure

A-2: “dsPICDEM™ 1.1 Plus Development Board Schematic (Sheet 1 of 5)”).

5.1.18 Sample Devices

A sample dsPIC DSC device programmed with the demonstration code is included in the dsPICDEM™ 1.1 Plus Development Board Kit. The 80-pin TQFP is soldered to a

1.5” x 1.5” adaptor PCB, which is inserted onto the emulation header, J1 1 and J13-J15. Handle the device carefully when inserting and extracting the adaptor board. The

orientation of the adaptor board is important. The Microchip logo and device part numbering should be aligned to read from left to right before insertion of the adaptor board. The pin 1 index marker of dsPIC30F device should align with the lower left 45° corner of the 80-pin QFP footprint (pin 1 of Emulation Header J14).

Pin-out information for the emulation header is shown in Figure A-2: “dsPICDEM™

1.1 Plus Development Board Schematic (Sheet 1 of 5)”.

Appendix A. Hardware Drawings and Schematics

A.1 INTRODUCTION

This Appendix provides a layout drawing of the printed circuit board followed by schematics for the dsPICDEM™ 1.1 Plus Development Board.

A.2 HIGHLIGHTS

• dsPICDEM™ 1.1 Plus Development Board Layout

• dsPICDEM™ 1.1 Plus Development Board Schematics

dsPICDEM™ 1.1 PLUS

DEVELOPMENT BOARD

USER’S GUIDE

dsPICDEM™ 1.1 Plus Development Board User’s Guide

FIGURE A-1: dsPICDEM™ 1.1 PLUS DEVELOPMENT BOARD LAYOUT

+++

Hardware Drawings and Schematics

FIGURE A-2: dsPICDEM™ 1.1 PLUS DEVELOPMENT BOARD SCHEMATIC (SHEET 1 OF 5)

GND

AVDDRB12

RB14RB9

RD5

GNDGND

RC1

VDD

7980

7778

7576

9596

9394

9192

8990

8788

8586

99100

9798

RA6 RA7

VDD

8384

RA10 RA9

RA12 RA13

RA14 RA15

RA13

RA9

RA7

RA10

RA12

RA6

7374

8182

RC14 CLKO

RC2 RC3

525314

RD0 RD1

MCLR1 CLKIN

RA15

AVDD

AGND

RA14

RD9

5354

5556

5758

5960

6162

6364

7172

6970

6768

6566

RD4

RD8

RD6 RD7

RD10 RD11

RD2 RD3

RF0

RD12 RD13

RF5

RF2

RF1

RF3

RF4

RF6

RD14 RD15

RF0 RF1

RF8

RF7

443940

RF8

RG0 RG1

RF2 RF3

RF4 RF5

RF6 RF7

RG6

RG3

RG1

RG0

RG2

RG2 RG3

RG7

GND

RG6 RG7

RB13

RG8 RG9

RG14 RG15

RG12 RG13

RG9

RG8

RG14

RG13

RG12

797810

RB15RB8

AGND

RG15

RB11

RB10

RB6

RB7

RB5

RC13

RC3

RC2

RC4

RC1

AGND

12345

RB3

RB0

RB2

RB1

RB4

RC14

GND

CLKO

GND

CLKIN

GND

2019181716

RB3

RB2

RB0

RB1

222127

RB6

RB4

RB5

332930

RB8

RB7

353436

RB9

RB10

RB15

RB14

RB12

RB11

RB13

615758

RD1

RD0

RD7

RD6

RD4

RD2

RD3

RD5

RD8

555456

RD9

RD12

RD10

RD11

VDD

RD13

RD14

RD15

MCLR1

OSC1 OSC2

GND

VDD

dsPICDEM™ 1.1 Plus Development Board User’s Guide

FIGURE A-3: dsPICDEM™ 1.1 PLUS DEVELOPMENT BOARD SCHEMATIC (SHEET 2 OF 5)

RG1

VDD

GND

RG0

RF1

RF0

13191218111710

161415

RD8

RD9

RA15

RA14

13191218111710

161415

RA6

RD10

RA7

RD11

RG13

RG12

RG14

RD0

RC14

RC13

RD3

RD2

RD1

MCLR1

MCLR2

321

RB7-242

RB6-242

RB1

RB0

RB7

RB6

246

135

123456789

RF8

RF2

RF3

123456789

RD6

RD5

RD12

RD13

RG3

RG2

OSC1

VDD

RF7

RF6

OSC2

GND

RD7

RD4

GND

VDD

43215

AVDD

2 1

VDDLCD

GND

OUT

ADJ

OUT

GND

VDD

AGND

2 1

AGND GND

OUT

RA9

RB7

RA10

RB6

123456789

RC2

RC1

RC3

RG15

123456789

ADJ

AVDD

RC4

AGND

RG6

RB8

RG7

RB10

RB9

RB11

RG8

RG9

MCLR1

GND

RB13

GND

RB12

RB14

VDD

13191218111710

161415

GND

RA13

RA12

RB5

VDD

13191218111710

161415

VDD

GND

RB15

RB4

RD14

RB3

RD15

RB2

RF5

RF4

RB1

GND RB0

AVDD

AGND

GND

Hardware Drawings and Schematics

FIGURE A-4: dsPICDEM™ 1.1 PLUS DEVELOPMENT BOARD SCHEMATIC (SHEET 3 OF 5)

RB8

AVDD

AGND

AVDD

AGND

2 1

RB6

AVDD

VDD

RB5

RB4

RB3

AGND

GND

VDD

GND

VDD

RD2

RD1

RA14

RA13

RA12

RA15

RD0

RD3

RD7

RG6

RG8

dsPICDEM™ 1.1 Plus Development Board User’s Guide

FIGURE A-5: dsPICDEM™ 1.1 PLUS DEVELOPMENT BOARD SCHEMATIC (SHEET 4 OF 5)

RF2

RF3

RD5

RD4

726

384

876

123

GND

VDD

246

135

123

TX232

TX485

RX232

RX485

456

GND

RTS

CTS

VDD

DATA_L

DATA_H

726

384

2 1

VDD

GND

GND VDD

VDD

122

4115 9

GND

1411

T1OUT

T2OUT

T1IN

T2IN

RF0

RF1

GND

VDD

R1IN

R2IN

R2OUT

R1OUT

RF4

RF5

GND

1615

VDD

726

GND

1411

T1OUT

T1IN

384

T2OUT

GND

R1IN

R2IN

GND

R1OUT

T2IN

R2OUT

RG1

RG0

TX485

RX485

RTS

TX232

CTS

RX232

Hardware Drawings and Schematics

FIGURE A-6: dsPICDEM™ 1.1 PLUS DEVELOPMENT BOARD SCHEMATIC (SHEET 5 OF 5)

RG7

RG6

RG9

234561471312

VDDLCD

7 8 9

10 11 12 13 14

4 5 6

RB6-242

RG8

151617

2812625242322

RB7-242

GND

124

AGND

LINE_IN

LINE_OUT

132

GND

VDDLCD

VDD

GND

MCLK

GND

RG14

VDDLCD

MCLR2

AGND

AVDD

VDD

GND

VDD

GND

VDD

GND

21011311615

78645

MCLK

AGND

RG15

RG13

AGND

GND

RG12

VDD

RF6

GND

dsPICDEM™ 1.1 Plus Development Board User’s Guide

NOTES:

Appendix B. LCD Controller Specification

B.1 OVERVIEW

The LCD display on the dsPICDEM™ 1.1 Plus Development Board is a PG12232D-L 8-bit 122 x 32 dot-matrix LCD controlled by a PIC18F242 LCD controller with a custom driver that supports a rich set of character and graphic commands. The 122 x 32 LCD supports a standard SED1520 type controller, which is interfaced to the PIC18F242 over a parallel interface bus. A full set of ASCII characters are available for display on a 4 x 20 character grid. In Graphics mode, individual pixels and bit patterns are supported. A line drawing facility is supported as part of the basic command set.

B.2 LCD CONTROLLER INTERFACE

The LCD controller (PIC18F242) is controlled via its Serial Peripheral Interface (SPI) port. The LCD controller operates as a slave SPI with a maximum SPI clock of 2.4 MHz. Using the standard PIC under Slave Select (SS) control with CKP = 0 and CKE = 0.

The dsPIC DSC SPI peripheral should be configured for:

•SMP = 0

•CKE = 0

•CKP = 0

• MODE16 = 0 and MSTEN = 1

The SPI master clock should not exceed 2.4 MHz. The SS control line should be used to synchronize the interface at the byte level.

On power-up, the LCD controller requires approximately 100 mS to initialize its internal buffers and clear the LCD display. It will not accept any input until it has completed its initialization sequence.

The controller stores incoming bytes in an interrupt buffer that is 186 bytes deep so that the dsPIC DSC device should not be able, under reasonable operation, to overrun the controller with input data. The buffer is large enough to hold a complete screen of characters plus several additional commands. The only way to overrun the buffer is to continuously send commands at a bit rate that is close to the maximum so that the LCD controller is completely occupied with receiving and storing the incoming commands and does not have sufficient extra time to process the commands. With SPI communications, the dsPIC DSC device gets a return byte with every byte sent to the controller. The controller provides the current buffer count as the return byte for each byte sent. The return byte enables the dsPIC DSC device to determine how many unprocessed bytes are in the controller’s buffer after the previous byte was received by the controller. This number can never be less than the size of the proceeding command sent since the controller will not remove a command from its receive buffer until the entire command is received. This feature could be used for flow control by the dsPIC DSC device, but given the speed of the controller and the size of the interrupt buffer, it is unlikely the dsPIC DSC device could overflow the controller’s buffer under normal usage. Thus, implementing flow control on the dsPIC DSC device in all but the most unusual circumstances would be an unnecessary complication.

MCU nomenclature, the LCD controller is set up as a slave

dsPICDEM™ 1.1 PLUS

DEVELOPMENT BOARD

USER’S GUIDE

dsPICDEM™ 1.1 Plus Development Board User’s Guide

B.3 COMMANDS

B.3.1 Command Structure

All commands recognized by the LCD controller are one to three bytes in length. The command structure is designed to follow a simple rule that allows the interface to

be self-synchronizing at the command level (i.e., if a command is corrupted for some reason, the controller can resynchronize on the command stream without special error recovery procedures). The rule is that the first byte of a command always has its MSB = 1 and the remaining bytes of the command have their MSB = 0. There is an exception to the rule that MSB = 0 for all bytes except the first byte. Some of the column commands can have data in the MSB of their second byte and thus, may violate this rule. The processing code in the LCD controller will parse these special commands and allow the command exception.

All commands follow the form of a leading identification byte followed by zero to three data bytes. The data bytes are not condensed or combined with other data, or modified from the native form of the data. There is no handshaking or flow control required because of the speed and buffer depth of the controller. This greatly simplifies the interface on the dsPIC DSC side since there is little advantage to putting wrappers around the individual commands. Nothing needs to be done to the data other than to send it.

B.3.2 Command Types

The LCD has three data types, each based on its own independent coordinate systems. The data types are:

•Character

•Pixel

• Column Associated with each coordinate system is a “current” position of which each is

independent of the other. These positions are:

• CharPos

•PixPos

•ColPos B.3.2.1 CHARACTERS

The character commands are used to write characters to the display. The character coordinates are based on a 5 x 7 dot font justified to the upper left corner of the 6 x 8 box. The character cursor is a 5-pixel wide horizontal line that is justified to the lower left corner of the 6 x 8 box and can be turned on or off, or can be set to blink.

Character operators are based on character coordinates R and C (i.e., Row and Column). The current position, CharPos, specifies both the location of the character cursor and the default position that the next character command will use. The home position is the top left of the LCD display, ChrPos = (0,0).

The LCD accommodates four character rows (0-3) and 20 character columns (0-19). Unless otherwise specified, incrementing ChrPosC beyond column 19 will wrap to the next row (i.e., ChrPosC = 0 and ChrPosR + 1). If ChrPosR exceeds 3, it will wrap to row 0.

LCD Controller Specification

B.3.2.2 PIXELS The pixel commands give the user control over individual pixels. Pixel coordinates

(X,Y) have their origin at the lower left of the LCD display. The coordinate range is X: 0-121 and Y: 0-31. The PixPos (X,Y) specifies the default location for pixel commands. The home position is the bottom left of the LCD display, PixPos = (0,0).

B.3.2.3 COLUMNS The column commands are used to write bitmaps to the display. A column is a vertical

column of 8 pixels that spans the height of one of the character rows. Column coordinates (X,R) have their origin at the upper left corner of the LCD.

The X is defined the same as the pixel coordinates and the R is defined the same as the character coordinates. The coordinate range is X: 0->121 and R: 0->3. The ColPos (X,R) specifies the default location for column commands. The home position is the top left of the LCD display, ColPos = (0,0).

Unless otherwise specified, incrementing ColPosX past 121 will wrap to the next line (i.e., ColPosX = 0 and ColPosY + 1). If ColPosY exceeds 31, it will wrap to line 0.

B.3.3 Power-up Defaults

Upon a device Reset, the following LCD controller conditions are valid:

• Character cursor off

• All coordinate variables are set to their home values:

- ChrPosC = 0, ChrPosR = 0

- PixPosX = 0, PixP osY = 0

- ColPosX = 0, ColPosR = 0

-ScrollY = 0

B.3.4 Command Description

A basic command format is implemented on the PIC18F242. In general, communicating with the PIC18F242 LCD controller requires adherence to this protocol:

• Command name: Description

• Cmd: Opcode value

• Data: Number of data bytes

- [7 6 5 4 3 2 1 0] Command dependent data

dsPICDEM™ 1.1 Plus Development Board User’s Guide

B.4 GENERAL COMMANDS

B.4.1 Reset Command

The Reset command resets the LCD display and PIC18F242 to their power-up state.

Field Form Value

Opcode 0x80 Data None None

B.4.2 Home Command

The Home command sets all coordinate variables to their home values and leaves the display unchanged.

Field Form Value

Opcode 0x81 Data None None

B.4.3 HomeClear Command

The HomeClear command clears the entire display and then sets all coordinate variables to their home values.

Field Form Value

Opcode 0x82 Data None None

B.4.4 Scroll Command

The Scroll command rolls the display in the vertical axis by the amount ScrollY. The LCD data array consists of 32 lines of 122 pixels each. If scrolling, value ScrollY is set to zero and the top row of the data array is displayed on the top row of the display.

Field Form Value

Opcode 0xA3 Data 0 0 0 Y4 Y3 Y2 Y1 Y0 0-31

Note: The Scroll command has no effect on the various coordinate systems. It

only changes the mapping of the data to the display (e.g., the top character row would be rolled to the bottom row of the display surface if ScrollY = 8 but its location in the data array is still at 0).

B.5 CHARACTER COMMANDS

The character commands treat the display like a 20-column, 4-row character display where the characters occupy 6 x 8 pixel elements. Note that there are 20 character locations on a row, each 6 pixels wide. This current implementation only uses 120 pixels of the 122-pixel wide display. The spare two-pixel columns are on the right of the display and cannot be affected by the character commands. The controller has a fixed space 5 x 7 font set for the printable ASCII characters in range: 0x20 -> 0x7E. The controller also recognizes three special characters that do not affect the display.

Note: The ChrPos increment after writing is suppressed for the special

characters.

1. CR: (0x0D) Increments ChrPosR.

2. LF: (0x0A) Sets ChrPosC = 0 and increments ChrPosR.

3. BS: (0x08) Decrements ChrPosC if ChrPosC > 0; it is non-destructive

B.5.1 ChrPos Command

The ChrPos command sets the character position to ChrPosC, ChrPosR. This command has no effect on the display except for moving character cursor if it is turned on.

LCD Controller Specification

Field Form Value

Opcode 0xC5 ChrPosC 0 0 0 C4 C3 C2 C1 C0 Column 0-19 ChrPosR 000000R1R2 Row 0-3

B.5.2 ChrPosInc Command

The ChrPosInc command increments the character position. This command has no effect on the display except for moving the character cursor if it is turned on.

Field Form Value

Opcode 0x8E Data None None

B.5.3 WrtChr Command

The WrtChr command sets ChrPos to (ChrPosC,ChrPosR), then writes ASCII character to ChrPos.

Field Form Value

Opcode 0xE6 Data 0 A6 A5 A4 A3 A2 A1 A0 ASCII character ChrPosC 000C4C3C2C1 C0 Column 0-19 ChrPosR 000000R1R0 Row 0-3

B.5.4 WrtChrInc Command

The WrtChrInc command sets ChrPos to (ChrPosC,ChrPosR), writes an ASCII character to ChrPos, and then increments ChrPos.

Field Form Value

Opcode 0xE7 Data 0 A6 A5 A4 A3 A2 A1 A0 ASCII character ChrPosC 000C4C3C2C1 C0 Column 0-19 ChrPosR 000000R1R0 Row 0-3

dsPICDEM™ 1.1 Plus Development Board User’s Guide

B.5.5 WrtChrNext Command

The WrtChrNext command writes an ASCII character to the current ChrPos, then increments ChrPos.

Field Form Value

Opcode 0xA8 Data 0 A6 A5 A4 A3 A2 A1 A0 ASCII character

B.5.6 ChrClearRow Command

The ChrClearRow command clears the entire row ChrPosR and leaves ChrPosC = 0.

Field Form Value

Opcode 0xA9 ChrPosR 000000R1R0 Row 0-3

B.5.7 ChrClearEOL Command

The ChrClearEOL command clears row ChrPosR from the current location to the end of the line and leaves ChrPos unchanged.

Field Form Value

Opcode 0x8A Data None None

B.5.8 ChrCursorOff Command

The ChrCursorOff command turns off the character cursor.

Field Form Value

Opcode 0x8B Data None None

B.5.9 ChrCursorOn Command

The ChrCursorOn command turns on the character cursor at the current ChrPos.

Field Form Value

Opcode 0x8C Data None None

B.5.10 ChrCursorBlink Command

The ChrCursorBlink command controls cursor blinking. If the time is set to zero, the cursor will not blink, else the cursor blinks with equal on and off times, with the on time being given by the blink time.

Field Form Value

Opcode 0xAD Blink Time 00000T2T1T0 (0-7) x 0.125

seconds

B.6 PIXEL COMMANDS

The pixel commands treat the display like a 122-column, 32-line set of pixels, which is the native resolution of the display. The pixel coordinate system differs from the others in having its origin at the lower left instead of at the upper left. Pixel coordinates are intended for graphs rather than letters or bitmap pictures.

B.6.1 PixPos Command

The PixPos command sets PixPos to (PixPosX,PixPosY) and leaves the display unchanged. This command is intended to be used in conjunction with the PixLine command.

Field Form Value

Opcode 0xD7 PixPosX 0 X6 X5 X4 X3 X2 X1 X0 Column 0-121 PixPosY 000Y4Y3Y2Y1 Y0 Line 0-31

B.6.2 PixOn Command

The PixOn command sets PixPos to (PixPosX,PixPosY) and turns on the pixel at that location. This command does not increment PixPos.

LCD Controller Specification

Field Form Value

Opcode 0xD8 PixPosX 0 X6 X5 X4 X3 X2 X1 X0 Column 0-121 PixPosY 000Y4Y3Y2Y1 Y0 Line 0-31

B.6.3 PixOff Command

The PixOff command sets PixPos to (PixPosX,PixPosY) and turns off the pixel at that location. This command does not increment PixPos.

Field Form Value

Opcode 0xD9 PixPosX 0 X6 X5 X4 X3 X2 X1 X0 Column 0-121 PixPosY 000Y4Y3Y2Y1 Y0 Line 0-31

B.6.4 PixLine Command

The PixLine command draws a straight line from the current PixPos to the specified location and leaves PixPos set to the new location.

Field Form Value

Opcode 0xDA PixPosX 0 X6 X5 X4 X3 X2 X1 X0 Column 0-121 PixPosY 000Y4Y3Y2Y1 Y0 Line 0-31

dsPICDEM™ 1.1 Plus Development Board User’s Guide

B.7 COLUMN COMMANDS

The column commands treat the display like a 122-column, 4-row set of 8-pixel high, 1-pixel wide display elements. The Least Significant bit of the column data byte is closest to the top of the display. The column rows are the same as the character rows but the horizontal axis is addressable to the pixel.

B.7.1 ColPos Command

The ColPos command sets ColPos to (ColPosX,ColPosR).

Field Form Value

Opcode 0xDB ColPosX 0 X6 X5 X4 X3 X2 X1 X0 Column 0-121 ColPosR 000000R1 R0 Row 0-3

B.7.2 WrtColNext Command

The WrtColNext command writes column data to the current ColPos and then increments ColPos.

Field Form Value

Opcode 0xBC Column Data D7 D6 D5 D4 D3 D2 D1 D0 Data

B.7.3 WrtColNextOR Command

The WrtColNextOR command ORs column data with existing data and writes the result to the current ColPos, then increments ColPos.

Field Form Value

Opcode 0xBD Column Data D7 D6 D5 D4 D3 D2 D1 D0 Data

B.7.4 WrtColNextAND Command

The WrtColNextAND command ANDs column data with existing data and writes the result to the current ColPos, then increments ColPos.

Field Form Value

Opcode 0xBE Column Data D7 D6 D5 D4 D3 D2 D1 D0 Data

B.7.5 WrtColNextXOR Command

The WrtColNextXOR command XORs column data with existing data and writes the result to the current ColPos, then increments ColPos.

Field Form Value

Opcode 0xBF Column Data D7 D6 D5 D4 D3 D2 D1 D0 Data

B.8 EXAMPLES

EXAMPLE B-1: WRITE A WORD

This example clears the display and writes “Hi” starting at row 2, column 10. Write the following bytes to the SPI port:

0x82 // Clear screen 0xE7, ‘H’, 10, 2 // Write ‘H’ to column 10, row 2, then increment the column 0xA8, ‘i’ // Write ‘i’ at column 11, row 2 then increment the column

EXAMPLE B-2: DRAW A STRAIGHT LINE

This example draws a straight line from X location (1,1) to Y location (119,3). Write the following bytes to SPI port:

0xD7, 1, 1 // Set Pixel cursor to X=1, Y=1 0xDA, 119, 31 // Draw line to X=119, Y=31

EXAMPLE B-3: DRAW AN ICON

This example draws an icon 8 pixels tall and 3 pixels wide that looks like a ‘T’ on row = 1, column = 19. Write the following bytes to SPI port:

0xDB, 19, 1 // Set Column cursor to X=19, Row = 1 0xBC, 0x01 // Write pixel at top of display at column 19, increment column 0xBC, 0xFF // Write vertical line at column 20, increment column 0xBC, 0x01 // Write pixel at top of display at column 21, increment column

LCD Controller Specification

dsPICDEM™ 1.1 Plus Development Board User’s Guide

NOTES:

Index

dsPICDEM™ 1.1 PLUS

DEVELOPMENT BOARD

USER’S GUIDE

Analog Features.......................................................11

Analog Potentiometers........................................61

Assembler Include Path...........................................20

DD Regulator........................................................61

, 63

Breakpoint...........................................................28, 58

Build Options.......................................................20

Build Project........................................................21

Building the Code................................................19

, 49 , 50 , 49

CAN Port.............................................................61, 62

Canned Crystal Socket............................................61

Code Debugging.................................................25, 55

Codec Reset Switch................................................. 61

Commands

Description........................................................77

Examples.......................................................... 83

General............................................................. 78

Power-up Defaults............................................ 77

Structure...........................................................76

Types................................................................ 76

Constants

__SPLIM_init ....................................................26

Creating the Project............................................14

Customer Notification Service....................................6

Customer Support......................................................7

, 44

Data Acquisition Demo Display................................ 30

Data Acquisition Demo Program.............................. 30

Data Acquisition Display ..........................................30

Data and Control Flow.............................................36

Power-up Peripheral Initialization.....................36

Demo Main Menu.................................... ...... ..... ......29

Demo Menu Options................................................30

Demonstration Code Module Summary................... 29

Demonstration Performance Metrics........................ 39

Summary with FIR Filter...................................40

Summary with IIR Filter.....................................41

Demonstration Program

Data Acquisition Display................................... 30

DSP Operations Display...................................32

DTMF Tone Generation....................................34

Summary .......................................................... 29

Demonstration Programs......................................... 12

Development Board

Features

Analog........................................................ 11

Device Clocking.........................................11

ICD 2 and ICE 4000 Connections..............10

Miscellaneous............................................11

Power Supply Circuit.................................10

Serial Communication Channels ...............10

Voice band Codec.....................................11

Photograph .........................................................9

Development Board Features..................................10

Device Clocking Features........................................11

Device Selection, for Project.............................. 14

Digital Potentiometer................................................64

Documentation

Conventions........................................................3

DSP Operations Demo Display................................32

DSP Operations Flow Diagram................................33

DTMF Tone Generation Controls.............................34

DTMF Tone Generation Demo.................................34

, 44

Emulation Headers............................................. 61, 65

Free Software Foundation..........................................4

GNU Language Tools................................................4

Hardware Components

Analog Potentiometers................................ 61

DD Regulator ................................................61

CAN Port..................................................... 61

Canned Crystal Socket.....................................61

Codec Reset Switch.......................................... 61

Digital Potentiometer.........................................64

Emulation Headers.....................................61, 65

ICD Connector............................................ 61

LCD Graphic Display ..................................61

LEDs........................................................... 61

Oscillator Options..............................................65

Oscillator X2......................................................61

Oscillator X3......................................................61

Phono Jacks ..................................................... 61

Plug-in Module.................................................. 62

Power Supply....................................................65

Power-on Indicator............................................65

Power-on LED...................................................61

Prototyping Area.........................................61

Push Button Switches.................................61

, 63 , 62

, 64 , 64 , 63

, 66 , 63

dsPICDEM™ 1.1 Plus Development Board User’s Guide

Reset Switch...............................................61, 66

RS-232 Serial Ports.................................... 61

RS-422 Port................................................ 61

RS-485 Port................................................ 61

, 62 , 63 , 63

Sample Devices................................................66

Si3000 Codec ...................................................61

Si3000 External Clock Socket...........................61

Si3000 Voice Band Codec................................64

Temperature Sensor...................................61

DD Regulator...................................................61

, 63

ICD Connector ...................................................61, 64

Internet Address.........................................................6

Interrupts..................................................................38

DCI....................................................................38

DTMF................................................................38

External.............................................................38

LCD Controller............................. ...... ..... ...... ....38

SPI ....................................................................38

Timer 1..............................................................39

Timer 2..............................................................39

UART Receive................................... ..... ...... ....38

UART Transmit....................................... ...... ....38

Kit Contents................................................................9

Language Toolsuite Selection, for Project.......... 15, 45

LCD Controller Interface................ ........................... 75

Character Commands.......................................79

Column Commands..........................................82

Commands........................................................76

Pixel Commands...............................................81

LCD Graphic Display................................. ..... ....61

LEDs .................................................................. 61

, 64 , 63

Make Project......................................................21, 50

Microchip Internet Web Site....................................... 6

Miscellaneous Features ...........................................11

MPLAB ASM30 Assembler............................ ...... ....15

MPLAB ICD 2.............13

MPLAB IDE....13

MPLAB IDE Project Wizard................................14

, 19, 20, 21, 22, 43, 49, 51, 52

, 14, 17, 18, 20, 23, 43, 44, 47, 48, 52

, 44

MPLAB IDE User’s Guide..........................................5

MPLAB LINK 30 Object Linker.................................15

Oscillator Options.....................................................65

Oscillator X2.............................................................61

Oscillator X3.............................................................61

Output Window........................................18

, 21, 48, 50

Peripherals

12-bit ADC.........................................................35

Data Converter Interface...................................36

Hierarchical/Prioritized Interrupt Control...........36

INTx pins...........................................................36

SPI 2 ............................................................. ....35

Timer1...............................................................35

Timer2...............................................................35

Timer3...............................................................35

Timer4...............................................................35

Timer5...............................................................35

UART2 TX/RX...................................................35

Phono Jacks.............................................................61

Plug-in Module .........................................................62

Photograph........................................................10

Power Supply...........................................................65

Power Supply Features............................................10

Power-on Indicator...................................................65

Power-on LED..........................................................61

Programming the Chip.......................................21

Project Name......................................................16

Project Window ..................................................18

Project Wizard....................................................14

Prototyping Area................................................. 61

Push Button Switches ........................................61

, 51 , 46 , 48 , 44 , 66 , 63

Reading, Recommended..................... ...... .................4

Reset Switch ......................................................61

RS-232 Serial Ports............................................61

RS-422 Port........................................................61

RS-485 Port........................................................61

, 66 , 62 , 63 , 63

Sample Devices .......................................................66

Serial Communication Features...............................10

Si3000 Codec...........................................................61

Si3000 External Clock Socket..................................61

Si3000 Voice Band Codec.......................................64

Source Code Window..............................18

, 27, 48, 57

Temperature Sensor...................................... ....61, 63

Test Code Module.................................................... 42

VDD Regulator..........................................................61

Voice Band Codec Features ....................................11

Warranty Registration.................................................4

Watch Window ...................................................27

WWW Address...........................................................6

, 57

NOTES:

Index

WORLDWIDE SALES AND SERVICE

AMERICAS

Corporate Office

2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Techn ical Su pport: http://support.microchip.com Web Address: www.microchip.com

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Boston

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Dallas

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Detroit

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Kokomo

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Los Angeles

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Santa Clara

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Toronto

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ASIA/PACIFIC

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Australia - Sydney

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China - Beijing

Tel: 86-10-8528-2 100 Fax: 86-10-8528-2104

China - Chengdu

Tel: 86-28-8665-5 511 Fax: 86-28-8665-7889

China - Fuzhou

Tel: 86-591-8750-3506 Fax: 86-591-8750-3521

China - Hong Kong SAR

Tel: 852-2401-1200 Fax: 852-2401-3431

China - Qingdao

Tel: 86-532-8502-7355 Fax: 86-532-8502-7205

China - Shanghai

Tel: 86-21-5407-5 533 Fax: 86-21-5407-5066

China - Shenyang

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China - Shenzhen

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China - Shunde

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China - Wuhan

Tel: 86-27-5980-5 300 Fax: 86-27-5980-5118

China - Xian

Tel: 86-29-8833-7 250 Fax: 86-29-8833-7256

ASIA/PACIFIC

India - Bangalore

Tel: 91-80-4182-8400 Fax: 91-80-4182-8422

India - New Delhi

Tel: 91-11-4160-8631 Fax: 91-11-4160-8632

India - Pune

Tel: 91-20-2566-1512 Fax: 91-20-2566-1513

Japan - Yokohama

Tel: 81-45-471- 6166 Fax: 81-45-471-6122

Korea - Gumi

Tel: 82-54-473-4301 Fax: 82-54-473-4302

Korea - Seoul

Tel: 82-2-554-7200 Fax: 82-2-558-5932 or 82-2-558-5934

Malaysia - Penang

Tel: 60-4-646-8870 Fax: 60-4-646-5086

Philippines - Manila

Tel: 63-2-634-9065 Fax: 63-2-634-9069

Singapore

Tel: 65-6334-8870 Fax: 65-6334-8850

Taiwan - Hsin Chu

Tel: 886-3-572-9526 Fax: 886-3-572-6459

Taiwan - Kaohsiung

Tel: 886-7-536-4818 Fax: 886-7-536-4803

Taiwan - Taipei

Tel: 886-2-2500-6610 Fax: 886-2-2508-0102

Thailand - Bangkok

Tel: 66-2-694-1351 Fax: 66-2-694-1350

EUROPE

Austria - Wels

Tel: 43-7242-2244-3910 Fax: 43-7242-2244-393

Denmark - Copenhagen

Tel: 45-4450-2828 Fax: 45-4485-2829

France - Paris

Tel: 33-1-69-53 -63-20 Fax: 33-1-69-30-90-79

Germany - Munich

Tel: 49-89-627-144-0 Fax: 49-89-627-144-44

Italy - Milan

Tel: 39-0331-742611 Fax: 39-0331-466781

Netherlands - Drunen

Tel: 31-416-690399 Fax: 31-416-690340

Spain - Madrid

Tel: 34-91-708-08-90 Fax: 34-91-708-08-91

UK - Wokingham

Tel: 44-118-921-5869 Fax: 44-118-921-5820

08/29/06

Microchip Technology dsPICDEM 1.1 Plus Development Board User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

Preface

Chapter 1. Introduction

1.1 INTRODUCTION

1.2 HIGHLIGHTS

1.3 dsPICDEM™ 1.1 PLUS DEVELOPMENT BOA RD KIT

FIGURE 1-1: dsPICDEM™ 1.1 PLUS DEVELOPMENT BOARD

FIGURE 1-2: dsPIC30F6014A PLUG-IN MODULE

1.4 dsPICDEM™ 1.1 PLUS DEVEL OPMENT BOARD FEATURES

1.5 SUPPORTED PLUG-IN MODULES

1.6 RUNNING THE dsPICDEM™ 1.1 PLUS DEMONSTRATION PROGRAM

Chapter 2. Using dsPIC30F Devices

2.1 INTRODUCTION

2.2 HIGHLIGHTS

2.3 TUTORIAL OVERVIEW

2.4 CREATING THE PROJECT

2.4.1 Select a Device

FIGURE 2-1: PROJECT WIZARD, STEP 1, SELECT A DEVICE

2.4.2 Select Language Toolsuite

FIGURE 2-3: PROJECT WIZARD, STEP 3, NAME YOUR PROJECT

2.4.3 Name Your Project

FIGURE 2-4: PROJECT WIZARD, STEP 4, ADD FILES TO PROJECT

2.4.4 Add Files to Project

2.5 BUILDING THE CODE

FIGURE 2-7: BUILD OPTIONS

2.5.1 Identify Assembler Include Path

2.5.2 Link for ICD 2

2.5.3 Build the Project

FIGURE 2-9: BUILD OUTPUT WINDOW

2.6 PROGRAMMING THE CHIP

2.6.1 Set Up the Device Configuration

FIGURE 2-10: CONFIGURATION SETTINGS

2.6.2 Connect the MPLAB ICD 2 In-Circuit Debugger

2.6.3 Enable MPLAB ICD 2 Connection

FIGURE 2-13: SETTING PROGRAM MEMORY SIZE

2.6.4 Program the dsPIC30F6014A Device

FIGURE 2-14: PROGRAMMING THE dsPIC30F6014A DEVICE

FIGURE 2-15: TUTORIAL LCD DISPLAY

2.7 DEBUGGING THE CODE

2.7.1 Display the Code

FIGURE 2-16: PROGRAM MEMORY WINDOW

2.7.2 Step the Program

FIGURE 2-17: SOURCE CODE WINDOW

FIGURE 2-18: WATCH WINDOW DISPLAY

2.7.3 Set Breakpoint

FIGURE 2-19: SETTING BREAKPOINT

Chapter 3. dsPIC30F Demonstration Program Operation

3.1 INTRODUCTION

3.2 HIGHLIGHTS

3.3 DEMONSTRATION PROGRAM OPERATION

3.3.1 Demonstration Code Module Summary

FIGURE 3-1: POWER-UP DISPLAY

FIGURE 3-2: DEMO MENU OPTIONS

3.3.1.1 DATA ACQUISITION DISPLAY MODE The Data Acquisition Display mode demonstrates the capability of the dsPIC30F

FIGURE 3-3: DATA ACQUISITION DISPLAY

FIGURE 3-5: HYPERTERMINAL CONFIGURATION SETTINGS

3.3.1.2 DSP OPERATIONS MODE

FIGURE 3-6: DSP OPERATIONS DISPLAY

TABLE 3-1: FREQUENCIES VS. POTENTIOMETER SETTING

FIGURE 3-7: DSP OPERATIONS FLOW DIAGRAM

FIGURE 3-8: FREQUENCY RESPONSE: IIR FILTER

FIGURE 3-9: FREQUENCY RESPONSE: FIR FILTER

3.3.1.3 DTMF GENERATION MODE

FIGURE 3-10: DTMF TONE GENERATION MENU

TABLE 3-2: DTMF TONE GENERATION CONTROLS

3.3.2 Demonstrated Features and Peripherals

3.3.2.1 dsPIC30F MCU/DSP FEATURES The demonstration program uses several unique dsPIC30F MCU/DSP features for

3.3.2.2 dsPIC30F DEMO PERIPHERALS The demonstration program also implements several dsPIC30F peripherals for various

3.4 DATA AND CONTROL FLOW

3.4.1 Power-up Sequence

TABLE 3-3: POWER-UP PERIPHERAL INITIALIZATION SEQUENCE

3.4.2 Main Loop Code Execution

TABLE 3-4: MAIN LOOP CODE EXECUTION SEQUENCE

3.4.3 Interrupts Used in the Demo

3.4.3.1 EXTERNAL INTERRUPTS TO MAIN ROUTINE

3.4.3.2 DCI INTERRUPTS AND DTMF