Microchip Technology DM164120-1 User manual

Low Pin Count Demo Board

User’s Guide

Information contained in this publication regarding device

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and may be superseded by updates. It is your responsibility to

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Programming, ICSP, ICEPIC, Linear Active Thermistor,

MPASM, MPLIB, MPLINK, MPSIM, PICkit, PICDEM,

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• 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

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

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Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our

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Microchip received ISO/TS-16949:2002 quality system certification for

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October 2003. The Company’s quality system processes and

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analog products. In addition, Microchip’s quality system for the design

and manufacture of development systems is ISO 9001:2000 certified.

LOW PIN COUNT DEMO BOARD

USER’S GUIDE

Table of Contents

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

Chapter 1. Low Pin Count (LPC) Demo Board Overview

1.1 Introduction .....................................................................................................7

1.2 Highlights ........................................................................................................ 7

1.3 Devices Supported by the LPC Demo Board ................................................. 7

1.4 LPC Demo Board Overview ........................................................................... 8

1.5 Running the PICkit™ 2 Flash Starter Kit Default Demonstration ...................8

Chapter 2. Mid-Range PICmicro®Architectural Overview

2.1 Introduction .....................................................................................................9

2.2 Memory Organization ...................................................................................10

2.3 Instruction formats ........................................................................................ 10

2.3.1 Assembler Basics ......................................................................................11

Chapter 3. LPC Demo Board Lessons

3.1 Introduction ...................................................................................................13

3.2 LPC Demo Board lessons ............................................................................ 13

3.2.1 Lesson 1: Hello World (Light a LED) .......................................................................14

3.2.2 Lesson 2: Delay Loop (Blink a LED) .......................................................................15

3.2.3 Lesson 3: Rotate (Move the LED) ...........................................................................17

3.2.4 Lesson 4: Analog-to-Digital .....................................................................................19

3.2.5 Lesson 5: Variable Speed Rotate ...........................................................................22

3.2.6 Lesson 6: Switch Debouncing ................................................................................23

3.2.7 Lesson 7: Reversible Variable Speed Rotate .........................................................25

3.2.8 Lesson 8: Function Calls ........................................................................................26

3.2.9 Lesson 9: Timer0 ....................................................................................................27

3.2.10 Lesson 10: Interrupts ............................................................................................29

3.2.11 Lesson 11: Indirect Data Addressing ....................................................................31

3.2.12 Lesson 12: Look-up Table (ROM Array) ...............................................................33

Appendix A. Hardware Schematics

A.1 Introduction ..................................................................................................37

Worldwide Sales and Service ....................................................................................38

Low Pin Count Demo Board User’s Guide

NOTES:

LOW PIN COUNT DEMO

BOARD USER’S GUIDE

Preface

INTRODUCTION

This chapter contains general information that will be useful to know before using the

Low Pin Count (LPC) Demo Board. Items discussed in this chapter include:

• About this Guide

• Warranty Registration

• Recommended Reading

• Troubleshooting

• The Microchip Web Site

• Development Systems Customer Notification Service

• Customer Support

DOCUMENT LAYOUT

This document describes how to use the Low Pin Count Demo Board User’s Guide as

a development tool to emulate and debug firmware on a target board. The manual

layout is as follows:

•Chapter 1. “Low Pin Count (LPC) Demo Board Overview” – An overview of

Microchip’s Low Pin Count Demo Board.

•Chapter 2. “Mid-Range PICmicro®Architectural Overview” – An overview of

the Mid-range PICmicro®Architecture.

•Chapter 3. “LPC Demo Board Lessons” – Contains a variety of lessons that

demonstrate how to utilize and experiment with the Low Pin Count Demo Board.

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®IDE on-line help.

Select the Help menu, and then Topics to open a list of available on-line help files.

Low Pin Count Demo Board User’s Guide

CONVENTIONS USED IN THIS GUIDE

This manual uses the following documentation conventions:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic characters Referenced books MPLAB®IDE User’s Guide

Emphasized text ...is the only compiler...

Initial caps A window the Output window

A dialog the Settings dialog

A menu selection select Enable Programmer

Quotes A field name in a window or

dialog “Save project before build”

Underlined, italic text with

right angle bracket A menu path File>Save

Bold characters A dialog button Click OK

A tab Click the Power tab

N‘Rnnnn A number in verilog format,

where N isthe total number of

digits, R is the radix and n is a

digit.

4‘b0010, 2‘hF1

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

Courier font:

Plain Courier Sample source code #define START

Filenames autoexec.bat

File paths c:\mcc18\h

Keywords _asm, _endasm, static

Command-line options -Opa+, -Opa-

Bit values 0, 1

Constants 0xFF, ‘A’

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

any valid filename

Square brackets [ ] Optional arguments mcc18 [options] file

[options]

Curly brackets and pipe

character: { | } Choice of mutually exclusive

arguments; an OR selection errorlevel {0|1}

Ellipses... Replaces repeated text var_name [,

var_name...]

Represents code supplied by

user void main (void)

{ ...

}

Preface

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.

RECOMMENDED READING

This user’s guide describes how to use the Low Pin Count (LPC) Demo Board. Other

useful documents are listed below. The following Microchip documents are available

and recommended as supplemental reference resources.

Readme for Low Pin Count (LPC) Demo Board

For the latest information on using the Low Pin Count (LPC) Demo Board, read the

“Readme for Low Pin Count Demo Board.txt” file (an ASCII text file) in the

PICkit 2 installation directory. The Readme file contains update information and known

issues that may not be included in this user’s guide.

Readme Files

For the latest information on using other tools, read the tool-specific Readme files in

the Readmes subdirectory of the MPLAB IDE installation directory. The Readme files

contain update information and known issues that may not be included in this user’s

guide.

PICkit™ 2 Microcontroller Programmer User’s Guide (DS51553)

Consult this document for instructions on how to use the PICkit 2 Microcontroller

Programmer hardware and software.

PIC16F685/687/689/690 Data Sheet (DS41262)

Consult this document for information regarding the PIC16F685/687/689/690 20-pin

Flash based, 8-bit CMOS Microcontroller device specifications.

MPLAB®IDE, Simulator, Editor User’s Guide (DS51025)

Consult this document for more information pertaining to the installation and features

of the MPLAB Integrated Development Environment (IDE) Software.

Low Pin Count Demo Board User’s Guide

THE MICROCHIP WEB SITE

Microchip provides online support via our web site at www.microchip.com. This web

site is used as a means to make files and information easily available to customers.

Accessible by using your favorite Internet browser, the web site contains the following

information:

•Product Support – Data sheets and errata, application notes and sample

programs, design resources, user’s guides and hardware support documents,

latest software releases and archived software

•General Technical Support – Frequently Asked Questions (FAQs), technical

support requests, online discussion groups, Microchip consultant program

member listing

•Business of Microchip – Product selector and ordering guides, latest Microchip

press releases, listing of seminars and events, listings of Microchip sales offices,

distributors and factory representatives

DEVELOPMENT SYSTEMS CUSTOMER CHANGE NOTIFICATION SERVICE

Microchip’s customer notification service helps keep customers current on Microchip

products. Subscribers will receive e-mail notification whenever there are changes,

updates, revisions or errata related to a specified product family or development tool of

interest.

To register, access the Microchip web site at www.microchip.com, click on Customer

Change Notification and follow the registration instructions.

The Development Systems product group categories are:

•Compilers – The latest information on Microchip C compilers and other language

tools. These include the MPLAB C18 and MPLAB C30 C compilers; MPASM™

and MPLAB ASM30 assemblers; MPLINK™ and MPLAB LINK30 object linkers;

and MPLIB™ and MPLAB LIB30 object librarians.

•Emulators – The latest information on Microchip in-circuit emulators.This

includes the MPLAB ICE 2000 and MPLAB ICE 4000.

•In-Circuit Debuggers – The latest information on the Microchip in-circuit

debugger, MPLAB ICD 2.

•MPLAB®IDE – The latest information on Microchip MPLAB IDE, the Windows®

Integrated Development Environment for development systems tools. This list is

focused on the MPLAB IDE, MPLAB SIM simulator, MPLAB IDE Project Manager

and general editing and debugging features.

•Programmers – The latest information on Microchip programmers. These include

the MPLAB PM3 and PRO MATE®II device programmers and the PICSTART®

Plus and PICkit®1 development programmers.

Preface

CUSTOMER SUPPORT

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative

• Local Sales Office

• Field Application Engineer (FAE)

• Technical Support

• Development Systems Information Line

Customers should contact their distributor, representative or field application engineer

(FAE) for support. Local sales offices are also available to help customers. A listing of

sales offices and locations is included in the back of this document.

Technical support is available through the web site at: http://support.microchip.com

In addition, there is a Development Systems Information Line which lists the latest ver-

sions of Microchip’s development systems software products. This line also provides

information on how customers can receive currently available upgrade kits.

The Development Systems Information Line numbers are:

1-800-755-2345 – United States and most of Canada

1-480-792-7302 – Other International Locations

DOCUMENT REVISION HISTORY

Revision A (May 2005)

• Initial Release of this Document.

Low Pin Count Demo Board User’s Guide

NOTES:

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