wtdogdemo.c

2410/vxworks/tornado下的基本实验包括 serial,ramdrv,interrupt,multi-tasking,FTP,TCP,UDP

/*WdDemo.c - 利用看门狗的例子*/
 
 
 /* includes */
 #include "vxWorks.h"
 #include "wdLib.h"
 #include "stdio.h"

 
 /* defines */
#define TIMEOUT			10
#define DEADLINE_TIME 1


 LOCAL WDOG_ID   wdId;		/*看门狗定时器ID*/

/*
	wdHandler - 看门狗定时器处理函数，
						处理结束后再次启动定时器
						循环处理

	RETURN : OK or ERROR					
*/

STATUS wdHandler()
{
	static int count = 0;
	if(count < TIMEOUT )
		{
			count++;
			printf("call wdHandler %d times!\n",count);
			/*再次启动wdId*/
		    if ((wdStart (wdId, sysClkRateGet ()* DEADLINE_TIME, 
		               (FUNCPTR) wdHandler, 0)) == ERROR)
		        {
		        perror ("Error in starting watchdog timer");
		        return (ERROR);
		        }
			
		}
	return (OK);
}

/*
	wdDemo	 - 看门狗定时器主函数，
						创建并发起一个看门狗定时器
	RETURN : OK or ERROR					
*/

STATUS wdDemo()
{
     /* 创建一个看门狗定时器 */
     if ((wdId = wdCreate ()) == NULL)
         {
         perror ("cannot create watchdog");
         return (ERROR);
         }
    /*启动看门狗定时器，并绑定一个处理函数*/
    if ((wdStart (wdId, sysClkRateGet ()* DEADLINE_TIME, 
               (FUNCPTR) wdHandler, 0)) == ERROR)
        {
        perror ("Error in starting watchdog timer");
        return (ERROR);
        }
		
		return (OK);

}