ADLINK MXC-6300 Series - Manual (Page 108)

96 Watchdog Timer (WDT) Function Library
/* set timeout value as 10 seconds */
/* WDT start automatically while timeout value is set
*/
w_reg(0x73,0x0A);
printf("----------------------------------------------
-----\n");
printf("WDT is set and counting down
now.<<<<<<<<<<<<<<<<<<\n");
printf("----------------------------------------------
-----\n");
for(count=10;count!=0;count--)
{
printf("Countdown %2d : 0xF6=%2x Press any key to
invoke keyboard interrupt.\n",count,r_reg(0xF6));
/* reset WDT timeout value to 10 seconds */
/* w_reg(0x73,0x0A); */
sleep(1);
}
printf("At least one keyboard interrupt must occur
during countdown.\n");
printf("Otherwise WDT has already reset system.\n\n");
printf("Try again and leave keyboard.\n\n");
/* disable WDT */
/* WDT stop while timeout value is set to zero */
w_reg(0x73,0x00);
printf("WDT is disable. Program is terminating.");
ExitConfig();
return 0;
}