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SOFTWARE

LD

PCOR,A

CLR

PCDDR

; PCO to PC3 configured as input with pull-up and interrupt.

CLR

PCDR

RET

.delay_45

LD

A,#200

loop2

LD

X,#$FF

loop1

DEC

X

JRNE

loop1

DEC

A

JRNE

loop2

RET

;**********************************************************

;

Program code

;**********************************************************

.main

CALL

Init

loop

HALT

; MCU put in lowest power mode.

JRA

loop

; Infinite loop, wait an interrupt occurs.

; *****************************************************************

; This set of instructions uses simple assembly mnemoniques.

; We can notice that the loop label is defined only locally (no dot

; in front of it) so it can not be seen by others modules linked

; with this file.

; *****************************************************************

;

********************************************

;

*

*

;

* INTERRUPT SUB-ROUTINES LIBRARY SECTION *

;

*

*

;

********************************************

.dummy

iret

.sw_rt

iret

; Empty subroutine. Go back to main (iret instruction)

.ext0_rt iret

.ext1_rt

LD

X,#48

; Size of the table stored in X.

; 3 x 16 coded values.

begin