PICDEMPIC18 datasheet(20/38 Pages) MICROCHIP

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PICDEM™ PIC18 Explorer Demonstration Board User’s Guide

DS51721B-page 16

2.4

PROGRAMMING THE MICROCONTROLLERS

Either or both the main microcontroller (PIC18F8722) and the RS-232 to USB, or the

PIC18LF2450 microcontroller, can be reprogrammed. The main microcontroller that is

reprogrammed can either be the board-mounted PIC18F8722 device or an alternate

main microcontroller, mounted on a PIM attached to the board.

This section discusses:

• Programming Requirements

• Loading the Program

2.4.1

Programming Requirements

To reprogram a sample device, the following is required:

• Program source code – Sample code is preloaded on the device, but user source

code can be substituted.

If this is done, the sample program can be restored using the file on the board kit’s

CD-ROM.

• An assembler or compiler – Source code must be assembled or compiled into a

Hex file before it can be programmed into the device.

• A programmer – Once the code is in the Hex file format, this device programs the

microcontroller’s Flash memory.

If the code protection bit(s) have not been programmed, the on-chip program

memory can be read out for verification purposes.

In meeting these requirements:

• Code development and debugging –

The free MPLAB® IDE software development tool includes a debugger and sev-

eral other software tools as well as a unified graphical user interface for working

with other Microchip and third-party software and hardware tools.

• Assembler –

The free MPLAB IDE tool includes the MPASM™ assembler.

• Compiler –

Microchip’s MPLAB® C18 is a C compiler for PIC18 microcontrollers and is fully

integrated for the MPLAB IDE environment.

• Programmer –

Microchip’s MPLAB® In-Circuit Debugger (ICD) 2 or PICkit™ Starter Kit can be

used to program the device and both are fully integrated for the MPLAB IDE

environment.

The free MPLAB IDE tool set and its documentation can be downloaded at

http://microchip.com.

For a list of the other mentioned devices’ documentation, see “Recommended

Reading” on page 3.

Other assemblers/compilers can be used. For a list of tools compatible with PIC

microcontrollers, see the Microchip web site (http://microchip.com).

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