Messages in this thread | | | Subject | Advantech Watchdog timer query. | From | Ryan Clayburn <> | Date | 21 Oct 2005 17:12:23 +0930 |
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Hi Everyone,
I work for a government agency so please forgive me for not having the latest version of the kernel. My question concerns an Advantech card PCI 6870 Single Board Computer and its watchdog timer. I am running Redhat 9 linux 2.4.20-8 and it comes with module that supports the hardware advantechwdt.o. I have been able install and communicate with the card. Get and set the timeout or margin and get the support information of the card. Everything seems to work except when i deliberately delay the ping to the card to let it reboot the system as a watchdog should it does not reboot. Is there something i am missing. Do i need a update to the driver? I am attaching the code. It is fairly simple and a lot of it is just reading and writing information read from the driver about the card. I would appreciate any help.
Cheers
Ryan Clayburn
Can i please be CC'ed the answers/comments posted to the list in response to my posting
************************************************************************ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <fcntl.h> #include <string.h> #include <sys/ioctl.h> #include <linux/types.h> #include <linux/watchdog.h> #include <time.h> #include <sys/time.h>
int main(int argc, const char *argv[]) { int fd; struct watchdog_info *wdog_info; time_t timenow; char supportOptions[500]; char dtime[50]; int i, err; int timein, timeout; fd = open("/dev/watchdog",O_WRONLY); if (fd==-1) { perror("watchdog"); return 1; } //printf("argc = %d\n", argc); err = ioctl(fd, WDIOC_GETSUPPORT, wdog_info); if (err < 0) printf("error is %d\n", err); if (wdog_info->options & WDIOF_KEEPALIVEPING) strcpy(supportOptions, "WDIOF_KEEPALIVEPING"); if (wdog_info->options & WDIOF_MAGICCLOSE) { if (strlen(supportOptions) == 0) { strcpy(supportOptions, "WDIOF_MAGICCLOSE"); } else { strcat(supportOptions, " | WDIOF_MAGICCLOSE"); } } if (wdog_info->options & WDIOF_SETTIMEOUT) { if (strlen(supportOptions) == 0) { strcpy(supportOptions, "WDIOF_SETTIMEOUT"); } else { strcat(supportOptions, " | WDIOF_SETTIMEOUT"); } } if (wdog_info->options & WDIOF_POWEROVER) { if (strlen(supportOptions) == 0) { strcpy(supportOptions, "WDIOF_POWEROVER"); } else { strcat(supportOptions, " | WDIOF_POWEROVER"); } } if (wdog_info->options & WDIOF_CARDRESET) { if (strlen(supportOptions) == 0) { strcpy(supportOptions, "WDIOF_CARDRESET"); } else { strcat(supportOptions, " | WDIOF_CARDRESET"); } } if (wdog_info->options & WDIOF_POWERUNDER) { if (strlen(supportOptions) == 0) { strcpy(supportOptions, "WDIOF_POWERUNDER"); } else { strcat(supportOptions, " | WDIOF_POWERUNDER"); } } if (wdog_info->options & WDIOF_EXTERN2) { if (strlen(supportOptions) == 0) { strcpy(supportOptions, "WDIOF_EXTERN2"); } else { strcat(supportOptions, " | WDIOF_EXTERN2"); } } if (wdog_info->options & WDIOF_EXTERN1) { if (strlen(supportOptions) == 0) { strcpy(supportOptions, "WDIOF_EXTERN1"); } else { strcat(supportOptions, " | WDIOF_EXTERN1"); } } if (wdog_info->options & WDIOF_FANFAULT) { if (strlen(supportOptions) == 0) { strcpy(supportOptions, "WDIOF_FANFAULT"); } else { strcat(supportOptions, " | WDIOF_FANFAULT"); } } if (wdog_info->options & WDIOF_OVERHEAT) { if (strlen(supportOptions) == 0) { strcpy(supportOptions, "WDIOF_OVERHEAT"); } else { strcat(supportOptions, " | WDIOF_OVERHEAT"); } } printf("\nWATCHDOG TIMER DAEMON\n"); printf("---------------------\n\n"); printf("Wdioc Get Support Information\n"); printf("-------------------------------------\n"); printf("Options: %s\nFirmware Version: %d\n", supportOptions, wdog_info->firmware_version); printf("Identity: ", wdog_info->identity); for (i = 0; i < 32; i++) { printf("%c", wdog_info->identity[i]); } printf("\n-------------------------------------\n\n"); ioctl(fd, WDIOC_GETTIMEOUT, &timein); printf("The current timeout is %d seconds\n", timein); timeout = 30; ioctl(fd, WDIOC_SETTIMEOUT, &timeout); printf("The timeout was set to %d seconds\n", timeout); time(&timenow); strcpy(dtime, ctime(&timenow)); printf("%s", dtime); while(1) { //write(fd, "\0", 1); ioctl(fd, WDIOC_KEEPALIVE, 0); if (err < 0) printf("error is %d\n", err); sleep(timeout*2+10); time(&timenow); strcpy(dtime, ctime(&timenow)); printf("%s", dtime); } close(fd); printf("bye bye...\n"); return 0; }
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