TIM2做输入捕获的问题。

只看该作者 · 2016-7-13 10:42

我在用tim2的CH1和CH3做输入捕获的时候，两个通道会相互影响是怎么回事儿
这是中断服务程序，
#pragma vector = TIM2_CAPCOM_TIF_vector
__interrupt void TIM2_CAPCOM_TIF(void)
{
  static unsigned int Ir[70];
  static unsigned int Fg[24];
  //i = (unsigned int)(8<<TIM2_CCR3H);
  //i |= (unsigned int)(TIM2_CCR3L);

  if(TIM2_SR1_CC1IF)                   //红外
  {
if( TIM2_CCER1_CC1P)             //下降沿产生的中断
{
   Ir[i] = ( TIM2_CCR1H << 8 );
   Ir[i] |= TIM2_CCR1L;
   TIM2_CCER1_CC1P = 0;             //改为上升沿捕获
   i++;

}
else                            //上升沿产生的中断
{
   Ir[i] = ( TIM2_CCR1H << 8 );
   Ir[i] |= TIM2_CCR1L;
   TIM2_CCER1_CC1P = 1;             //改为下降沿捕获
   i++;
}
if(i == 70){
   i = 0;
}
  }

  if(TIM2_SR1_CC3IF)                //FG
  {
if(TIM2_CCER2_CC3P)             //下降沿产生的中断
{
   Fg[j] = ( TIM2_CCR3H << 8 );
   Fg[j] |= TIM2_CCR3H;
   j++;
   //TIM2_CCER2 &=~ 0x02;             //改为上升沿捕获
   TIM2_CCER2_CC3P = 0;
}
else                            //上升沿产生的中断
{
   Fg[j] = (TIM2_CCR3H << 8);
   Fg[j] |= TIM2_CCR3L;
   j++;
   //TIM2_CCER2 |= 0x02;             //改为下降沿捕获
   TIM2_CCER2_CC3P = 1;
}
if(j==24)
{
   j = 0;
}
  }

  TIM2_CNTRH = TIM2_CNTRL = 0;
}//*/