IDLOC PIC16CXXX Example

IDLOC PIC16CXXX Example

Directives highlighted in this example for PIC16CXXX devices are:

• __idloc

Program Functional Description

This program demonstrates the utility of the __idlocs directive. This directive is used to program device ID bits in the IDLOC register during device programming.

Commented Code Listing

list p=16f877 ;Select the device.

#include <p16f877.inc> ;Include standard header file

;for the selected device.

__idlocs H'1234' ;Sets device ID to 1234.

RST CODE H'0' ;The code section named RST

;is placed at H'0'.

;The instruction 'goto start' is

;placed in code section RST

goto start ;Jumps to the location labelled

;'start'.

INTRT CODE H'4' ;The code section named INTRT is

;placed at H'4'.The instruction

;'goto service_int' is placed in

;code section INTRT.

goto service_int ;Jumps to the location labelled

;'service_int'.

PGM CODE ;This is the begining of the code

;section named PGM. It is a

;relocatable code section since

;no absolute address is given along

start ;with directive 'CODE'.

goto $

service_int

retfie

end