IEI Technology IRS-100-ULT3, User Manual

Page: 105 / 108

IRS-100-ULT3 Railway Surveillance System
Page 92
NOTE:
The Watchdog Timer is activated through software. The software
application that activates the Watchdog Timer must also deactivate it
when closed. If the Watchdog Timer is not deactivated, the system will
automatically restart after the Timer has finished its countdown.
EXAMPLE PROGRAM:
; INITIAL TIMER PERIOD COUNTER
;
W_LOOP:
;
MOV AX, 6F02H ;setting the time-out value
MOV BL, 30 ;time-out value is 48 seconds
INT 15H
;
; ADD THE APPLICATION PROGRAM HERE
;
CMP EXIT_AP, 1 ;is the application over?
JNE W_LOOP ;No, restart the application
MOV AX, 6F02H ;disable Watchdog Timer
MOV BL, 0;
INT 15H
;
; EXIT ;