//convert it to seconds since 1970 time_val.tv_sec = mktime (&tm_val);
//set the time in the linux system clock settimeofday (&time_val, NULL);
//read the date from the realtime clock gettimeofday (&time_val, NULL);
//display the value from the clock
printf (“%s \n”, ctime ((time_t *) & time_val.tv_sec));
}
This next program is an example of how to activate and manipulate the watchdog timer.
//watchdog.c
//This sample program demonstrates how to register with
//the watchdog timer, tickle it, and finally unregister
//with it.
#include <stdio.h> #include <fcntl.h>
#include <asm/EZ328watchdog.h> void main ()
{
int watchdog_id; int watchdog_handle; int value;
long arg; value = 120;
arg = (long) &value;
//open the watchdog timer device and register
//the timeout period with it
watchdog_handle = open (“/dev/watchdog”, O_RDWR); ioctl (watchdog_handle, WATCHDOG_REGISTER, arg); watchdog_id = arg;
//hit the watchdog (reset the counter) ioctl (watchdog_handle, WATCHDOG_TICKLE,
(long)watchdog_id);
//unregister with the watchdog, disable the timer ioctl (watchdog_handle, WATCHDOG_UNREGISTER,
(long)watchdog_id); close (watchdog_handle);
}
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