watchdog_test.c

Embest EudKit-II教学系统配Samsung S3C2410处理器的部分测试程序。

/*********************************************************************************************
* File：	watchdog_test.c
* Author:	embest
* Desc：	c main entry
* History:	
*			
*********************************************************************************************/
/*------------------------------------------------------------------------------------------*/
/*                                     include files	                                    */
/*------------------------------------------------------------------------------------------*/
#include "2410lib.h"

/*------------------------------------------------------------------------------------------*/
/*               global varibles and interrupte service routine declare                     */
/*------------------------------------------------------------------------------------------*/
void watchdog_int(void) __attribute__((interrupt ("IRQ")));
static volatile INT8T f_ucSecondNo;

/*------------------------------------------------------------------------------------------*/
/*                                     function code	                                    */
/*------------------------------------------------------------------------------------------*/
/*********************************************************************************************
* name:		watchdog_test
* func:		watchdog timer test function
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void watchdog_test(void)
{
	uart_printf("\n WatchDog Timer Test Example\n");
	uart_printf(" 10 seconds:\n");

	ClearPending(BIT_WDT);							// clear interrupt pending bit
	pISR_WDT = (unsigned)watchdog_int;				// Initialize WDT interrupt handler entry
	rWTCON = ((PCLK/1000000-1)<<8)|(3<<3)|(1<<2);	// 1M,1/128, enable interrupt
	rWTDAT = 7812;									// 1M/128=7812
	rWTCNT = 7812;
	rWTCON |=(1<<5);								// start watchdog timer
	
	rINTMOD &= ~(BIT_WDT);
	rINTMSK &= ~(BIT_WDT);
	while((f_ucSecondNo)<11);
	
	rINTMSK |= BIT_WDT;								// mask watchdog timer interrupt
	uart_printf(" end.\n"); 
}

/*********************************************************************************************
* name:		watchdog_int
* func:		watchdog interrupt service routine
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void watchdog_int(void)
{
	UINT8T szBuf[10];
	ClearPending(BIT_WDT);
	f_ucSecondNo++;	
	if(f_ucSecondNo<11)
		sprintf(&szBuf,"%ds",f_ucSecondNo);
	else
		sprintf(&szBuf, "O.K.");
				
	#ifdef BOARDTEST
	print_lcd(200,170,0x1c,&szBuf);	
	#endif
	uart_printf(szBuf);
	uart_printf("\n");
}