看门狗使用的问题

只看该作者 · 2017-1-26 09:36

现在想将程序加入看门狗功能，搞了半天也不明白该如何使用，小弟不才，希望能够获得大家指点
#include "msp430x14x.h"
#define UINT8 unsigned char
#define UINT16 unsigned int
#define False 0
#define True 1

UINT16 Timer_Counter = 0;
UINT8  Timer_Flag = False;
UINT8  Light_Start = False;
UINT8  Fun_Choose = False;

/***********时钟初始化函数***********/
void clk_init()
{
  UINT8 i;
  BCSCTL1&=~XT2OFF; //打开高频晶体振荡器
  BCSCTL2|=SELM_2+SELS; //MCLK和SMCLK都选择XT2,8MHZ
do
{
   IFG1&=~OFIFG; //清除振荡器失效标志
   for(i=0xff;i>0;i--);  //延迟待稳定

}
while((IFG1&OFIFG)!=0);
}

void GPIO_Init()
{
  P1DIR &= ~BIT5;
  P1OUT |= 0xFF;
  P2DIR |= BIT6;
  P2OUT &= 0x00;

  P5DIR |= BIT4;
  P5OUT &= ~BIT4;
}
/*****************TimerA_Init*******************/
void TimerA_Init()
{
  TACTL|=TASSEL_2+MC0+TACLR+TAIE+ID_3;
  CCTL0 = CCIE;
  TACCR0=29999;
}
//******************************************************
//352微秒延时程序
void delay_352us(UINT16 i)//352us延时程序
{
  UINT8 j;
  while(i--)
  {
for(j=0;j<255;j++)
{
_NOP();
_NOP();
_NOP();
_NOP();
}
  }
}

/************************************************/
/*                主函数                   */
/************************************************/
void main(void)

{

//  WDTCTL = WDTPW + WDTHOLD;                // Stop watchdog timer

WDTCTL = WDTPW + WDTCNTCL;

P5DIR |= BIT4;                         // Set P5.4 to output direction
P5OUT ^= BIT4;
clk_init();

GPIO_Init();

TimerA_Init();

_EINT();
LPM0;
WDTCTL = WDTPW + WDTCNTCL;

}

/************定时器A中断函数******************/
#pragma vector=TIMERA0_VECTOR
__interrupt void timer0()
{
switch(TAIV)
{
   case TAIV_TACCR1:break;
   case TAIV_TACCR2:break;
   case TAIV_TAIFG:
   {
   Timer_Counter++;
   if(((P1IN & BIT5)>>5) == 1)
   {
         Fun_Choose = False;
   }
   else
   {
         Fun_Choose = True;
   }


   if(Fun_Choose == True)
   {
      if(Timer_Counter >= 11)

      {

         Timer_Flag = 0;

      }
      if(Timer_Counter >= 33)
         {
            Timer_Counter = 0;
            Timer_Flag = 1;
         }
      if(Timer_Flag == True)
      {
         P2OUT |= BIT6;
         P5OUT |= BIT4;
      }
      else
      {
         P2OUT &= ~BIT6;
         P5OUT &= ~BIT4;
      }
   }
   else
   {
      P5OUT |= BIT4;
      P2OUT |= BIT6;
   }
   }
   break;
}
}