stm8s103f3 pwm 输入捕获

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zoulinqi110| 中级技术员

楼主 | 2014-7-4 14:43 | 只看该作者回帖奖励

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PWM, STM8S103f3, TI, ic, Value

stm8s103f3 pwm 输入捕获只用tim1 ch1单个寄存器
初始化：TIM1_DeInit();
TIM1_TimeBaseInit(7, TIM1_COUNTERMODE_UP,40000,0);
TIM1_ICInit(TIM1_CHANNEL_1, TIM1_ICPOLARITY_FALLING,
TIM1_ICSELECTION_DIRECTTI, TIM1_ICPSC_DIV8, 0x00);
TIM1_ClearFlag(TIM1_FLAG_CC1);
TIM1_CCxCmd(TIM1_CHANNEL_1, ENABLE);
TIM1_ITConfig(TIM1_IT_CC1,ENABLE);
中断：#pragma vector=14
__interrupt void Timer1Capture(void)
{
if(TIM1_SR1 & 0x01)
{
   if( TIM1_CCER1 & 0x01)//下降沿产生的中断
   {
   ICValue1 =TIM1_GetCapture1();
   TIM1_CCER1 &=0x01;//改为上升沿捕获

   }
   else//上升沿产生的中断
   {
   ICValue2 =TIM1_GetCapture1();
   TIM1_CCER1|=0x01;


}
}

   if(ICValue2 > ICValue1)
      Period = ICValue2-ICValue1;
else if(ICValue2<ICValue1)
      Period = 0xffff + ICValue2-ICValue1;
   HIGH=Period/8;

}
只能捕获到ICValue1的值，不知道哪里设置错了，求解！

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