wdt_test.c

ATEML AT91SAM9260测试程序。包括 can测试

/*
 * wdt_test.c
 * Watchdog Driver Test Program
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/types.h>
#include <linux/watchdog.h>

int fd, timeout;

/*
 * This function simply sends an IOCTL to the driver, which in turn ticks
 * the PC Watchdog card to reset its internal timer so it doesn't trigger
 * a computer reset.
 */
void keep_alive(void)
{
    int dummy;

    ioctl(fd, WDIOC_KEEPALIVE, &dummy);
}

/*
 * The main program.  Run the program with "-d" to disable the card,
 * or "-e" to enable the card.
 */
int main(int argc, char *argv[])
{
    fd = open("/dev/watchdog", O_WRONLY);
    
    if (fd == -1) {
	fprintf(stderr, "Watchdog device not enabled.\n");
	fflush(stderr);
	exit(-1);
    }
    
    if (argc > 1) {
	if (!strncasecmp(argv[1], "-test", 5)) {
	    ioctl(fd, WDIOC_SETOPTIONS, WDIOS_ENABLECARD);
	    while (1){
		sleep(100);
	    }
	} else if (!strncasecmp(argv[1], "-d", 2)) {
	    ioctl(fd, WDIOC_SETOPTIONS, WDIOS_DISABLECARD);
	    fprintf(stderr, "Watchdog card disabled.\n");
	} else if (!strncasecmp(argv[1], "-e", 2)) {
	    ioctl(fd, WDIOC_SETOPTIONS, WDIOS_ENABLECARD);
	    fprintf(stderr, "Watchdog card enabled.\n");
	} else if (!strncasecmp(argv[1], "-t", 2) && (argc > 2)) {
	    timeout = atoi(argv[2]);
	    ioctl(fd, WDIOC_SETTIMEOUT, &timeout);
	    fprintf(stderr, "Set timeout %s sec.\n", argv[2]);
	} else {
	    fprintf(stderr, "-d to disable, -e to enable, -t val to set timeout.\n");
	    fprintf(stderr, "run by itself to tick the card.\n");
	}
	fflush(stderr);
	exit(0);
    } else {
	fprintf(stderr, "Watchdog Ticking Away!\n");
	fflush(stderr);
    }
    
    while(1) {
	keep_alive();
	sleep(1);
    }
}