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// 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);
}