How can I generate a hard reset with WDT?

Robotics & Edge Computing Jetson Systems Jetson TX1
2

Try this app. Also attached the code for your reference.
sudo ./wdt 20 20

#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/ioctl.h>

#include <linux/watchdog.h>

#define DEV_NAME "/dev/watchdog"

int main(int argc, char **argv) {
        int interval, margin;

    if (argc >= 2) interval = atoi(argv[1]);
    if (argc >= 3) margin = atoi(argv[2]);

    printf("watchdogd started (interval %d, margin %d)!\n", interval, margin);

    int fd = open(DEV_NAME, O_RDWR|O_CLOEXEC);
    if (fd == -1) {
        fprintf(stderr, "watchdogd: Failed to open %s: %s\n", DEV_NAME, strerror(errno));
        return 1;
    }

    int timeout = interval + margin;
    int ret = ioctl(fd, WDIOC_SETTIMEOUT, &timeout);
    if (ret) {
        ret = ioctl(fd, WDIOC_GETTIMEOUT, &timeout);
        if (ret) {
            fprintf(stderr, "watchdogd: Failed to get timeout: %s\n", strerror(errno));
        } else {
            if (timeout > margin) {
                interval = timeout - margin;
            } else {
                interval = 1;
            }
            fprintf(stderr, "watchdogd: Adjusted interval to timeout returned by driver: timeout %d, interval %d, margin %d\n",
                  timeout, interval, margin);
        }
    } else {
                printf ("watchdogd: set timeout success\n");
    }

        return 0;
}

wdt.txt (9.76 KB)