How to use watch dog in linux – IBASE SMARC-EVK1 User Manual

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SMARC Evaluation Kit

6.2.3. How to use Watch dog in Linux

#include
#include
#include
#include

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;
}