STM8S的AD开启后再关闭就开不了

只看该作者 · 2013-6-17 10:20

MCU是STM8S105S4，现在我在PWM定时器1中断里采集AD值，只有开关信号开了才采集和开启下一次转换，如果开关关了就不进行下次开启，AD中断里关AD清标志。结果开关关了后再开，结果AD就不会启动了，求高手指点下。以下是程序：
void init_AD(void)
{
ADC1_DeInit();
ADC1_ClearITPendingBit(ADC1_IT_EOC);
ADC1_Init(ADC1_CONVERSIONMODE_SINGLE, ADC1_CHANNEL_4, ADC1_PRESSEL_FCPU_D18, ADC1_EXTTRIG_TIM, DISABLE, ADC1_ALIGN_RIGHT, ADC1_SCHMITTTRIG_CHANNEL0, DISABLE);
//单次转换，通道4，18分频，右对齐，施密特关闭，外部触发关闭
ADC1_ScanModeCmd(DISABLE);
ADC1_DataBufferCmd(DISABLE);
ADC1_ITConfig(ADC1_IT_EOCIE, ENABLE); //转换完成中断
}

#pragma vector=0xD
__interrupt void TIM1_UPD_OVF_TRG_BRK_IRQHandler(void)
{
u8 k;
TIM1_ClearITPendingBit(TIM1_IT_UPDATE);
  //  GPIO_WriteHigh(PC_PORT,LED_RED_PIN);
if(powerflag==2)
{
   get_AD();
   accspeed_control();
   speed_deal();
   current_deal();
   DUTY_change();
   ADC1_StartConversion();
   for(k=40;k>0;k--);
   ADC1_StartConversion();
}
}

#pragma vector=0x18
__interrupt void ADC1_IRQHandler(void)
{
//GPIO_WriteHigh(PC_PORT,LED_RED_PIN);
ADC1_Cmd(DISABLE);
ADC1_ClearITPendingBit(ADC1_IT_EOC);
finishflag=1;
}