ADLINK Technology MI-960, User Manual

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Watchdog Timer 67
MI-960
Appendix A - Watchdog Timer
The following is a sample program for configuring the MI-960’s
watchdog timer.
A.1 Sample Code
#include<stdio.h>
#include<dos.h>
static unsigned int IT8712_ioPort = 0x2e;
void Enter_IT8712_Config(unsigned int flag)
{
if(flag) IT8712_ioPort = 0x4e;
else IT8712_ioPort = 0x2e;
switch(IT8712_ioPort)
{
case 0x2E: //Address port = 0x2E,
enter keys = 0x87, 0x01, 0x55, 0x55
outportb(0x2E, 0x87);
outportb(0x2E, 0x01);
outportb(0x2E, 0x55);
outportb(0x2E, 0x55);
break;
case 0x4E: //Address port = 0x4E,
enter keys = 0x87, 0x01, 0x55, 0xAA
outportb(0x4E, 0x87);
outportb(0x4E, 0x01);
outportb(0x4E, 0x55);
outportb(0x4E, 0xAA);
break;
default:
break;
}
}
void Exit_IT8712_Config(unsigned int flag)
{
if(flag) IT8712_ioPort = 0x4e;
outportb(IT8712_ioPort, 0x02);