Aaeon SBC-551 Manual - page 93
Manual is about: Half-Size PISA/ISA Pentium CPU Card
of
95
Appendix A Programming the Watchdog Timer 85
Demo program
outportb(0x444, 0):
// set time-out event to reset-system
outportb(0x443x 10);
// set time-out interval to 10 seconds
iutportb(0x443);
// enable watchdog timer
customer_job();
// execute your job here, be sure your
job will finished within 10 seconds
outportb(0x80, 0);
// refresh watchdog timer, otherwise
the system will reset after time-out
outputb(0x443, 20);
// set time-out interval to 20 seconds
inportb(0x443);
// enable watchdog timer
another_job();
// another job finished in 20 seconds
outportb(0x80, 0)
// disable watchdog timer
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