wdt.c

来自「Dignostic test program for SMDK441f boar」· C语言 代码 · 共 64 行

#include "def.h"
#include "option.h"
#include <string.h>
#include "k44.h"
#include "k44lib.h"


void Test_Wdt(void)
{
    int i;
    
    Uart_Printf("[]Watch dog timer test\n");
    //Basic timer period: 20Mhz/ 2^13 / 256 = 9.537 Hz
    //Watch dog timer period: 9.537/8 = 1.19 Hz
    
    Uart_Printf("After completing a count down until 10, CPU will be reset by WDT.\n");
	
    rBTCON=0x0003;

    for(i=0;i<10;i++)
    {
        Delay(500);
    	rBTCON=0x0003;  //not to make MCU reset during this while statement.
    	Uart_Printf("%d ",i);
    }
    //MCU will be reset after 0.840 sec after the last rBTCON access.   
    while(1); // wait until reset.	
}




volatile int btCount;




void __irq IsrBasicTimer(void)
{
    rINTPEND=~BIT_BT;  //clear URXD pending bit
    btCount++;
}




void Test_BasicTimerInt(void)
{
    Uart_Printf("[]Basic timer interrupt test\n");

    rBTCON=0xa503;
    pISR_BT=(unsigned)IsrBasicTimer;
    rINTMASK=BIT_BT;
    btCount=0;
    Uart_Printf("Wait 5 basic timer interrupts\n");
    while(btCount<5);
    rINTMASK=0;
    Uart_Printf("Basic timer interrupt test O.K.\n");
}