watchdog doesn't reboot issue when timeout

[jiuzhuaxiong]

when no feed watchdog , the system will hang, and does not reboot

include

include

include

include

include

include <sys/ioctl.h>

include <linux/types.h>

include <linux/watchdog.h>

include

int fd;

void catch_int(int signum) { signal(SIGINT, catch_int);

printf("In signal handler\n");
if(0 != close(fd))
{
    printf("Close failed in signal handler\n");
}
else
{
    printf("Close succeeded in signal handler\n");
}

}

int main(int argc,char* argv[]) { int ii; int timeout, timeout_bk; //signal(SIGINT, catch_int); fd = open("/dev/watchdog", O_RDWR); if (fd == -1) { perror("watchdog"); exit(EXIT_FAILURE); }

if(argc == 3)
{
    timeout = atoi(argv[1]);
    ii = atoi(argv[2]);
}
else
{
    timeout = 10;
    ii = 10;
}
ioctl(fd, WDIOC_GETTIMEOUT, &timeout_bk);
printf("-Open watchdog ok;org timeout=%d\n", timeout_bk);

ioctl(fd, WDIOC_SETTIMEOUT, &timeout);
printf("The timeout is set to %d seconds\n", timeout);

// Ping WDT for 10 times, then let system reset
while (1)
{
    printf("ii = %d\n", ii);
    if(ii-- > 0)
    {
        ioctl(fd, WDIOC_KEEPALIVE, 0);
        sleep(1);
    }
    else if (timeout-- > -5)
    {

        printf("timeout=%d\n", timeout);
        sleep(1);
    }
}
close(fd);
return 0;

}

[jiuzhuaxiong]

but you can call reboot , reboot the device .

[yachen]

Hi,

Please make sure power on setting enables WDT (PA.3), otherwise WDT cannot reboot the system.

Sincerely,

Yi-An Chen

[jiuzhuaxiong]

YES

[jiuzhuaxiong]

Now I get the PA.3 to NC state , and get the watchdog=on, it works , but only enable it 2s timeout , how can i get this timeout value to 8.03 maximum value ?

[yachen]

Set a timeout value equal to or larger than 8 sec with ioctl() command.

if(timeout < 2) {
    val |= 0x5 << 8;
} else if (timeout < 8) {
    val |= 0x6 << 8;
} else {
    val |= 0x7 << 8;
}