IBASE MRS-801-RE - Manual (Page 90)

82 MRS-801-RE User Manual
1.2.3 How to use Watchdog in Linux
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
int main(void)
{
int fd = open("/dev/watchdog", O_WRONLY);
int ret = 0;
if (fd == -1) {
perror("watchdog");
exit(EXIT_FAILURE);
}
while (1) {
ret = write(fd, "\0", 1);
if (ret != 1) {
ret = -1;
break;
}
puts("[WDT] Keep alive");
sleep(50);
}
close(fd);
return ret;
}