stm32f303 AD 模拟看门狗不能产生中断

guojunjunjun200 提问时间：2020-3-30 21:46 /

问答
是否解决:

芯片：stm32f303CBT6
IDE：keil
我配置好后ADC后，当从ADC通道引脚输入的电压超过设置范围后，不能进入ADC模拟看门狗中断。
如果在main函数中的while循环里调用ADC_GetConversionValue(ADC1)时，则可以以进入ADC模拟看门狗中断
我想在不调用ADC_GetConversionValue(ADC1)情况应该是可以进入ADC模拟看门狗中断的，可能是我哪没有
配置好才导致进不了中断的。有用过stm32f303看门狗的帮忙指正，在这里谢谢了。
以下是代码：
**注：不用DMA功能，用DMA功能当然可以产生中断，因为DMA会在后台会读取ADC数据寄存器。**
u32 calibration_value1 = 0;
void ADC1_2_IRQHandler(void)
{
      if(SET == ADC_GetFlagStatus(ADC1,ADC_FLAG_AWD1))
      {
            ADC_ITConfig(ADC1,ADC_IT_AWD1,DISABLE);
            ADC_ClearFlag(ADC1,ADC_FLAG_AWD1);
            ADC_ClearITPendingBit(ADC1,ADC_IT_AWD1);
      }
      if(SET == ADC_GetFlagStatus(ADC2,ADC_FLAG_AWD2))
      {
            ADC_ITConfig(ADC2,ADC_IT_AWD2,DISABLE);
            ADC_ClearITPendingBit(ADC2,ADC_IT_AWD2);

      }
}
void adc1_init(void)
{

      ADC_CommonInitTypeDef cs;
      ADC_InitTypeDef       adcs;

      ADC_VoltageRegulatorCmd(ADC1, ENABLE);
      delay_ms(1);
      ADC_SelectCalibrationMode(ADC1, ADC_CalibrationMode_Single); ADC_StartCalibration(ADC1);

      while(ADC_GetCalibrationStatus(ADC1) != RESET );
      calibration_value1 = ADC_GetCalibrationValue(ADC1);
      adcs.ADC_ContinuousConvMode = ADC_ContinuousConvMode_Enable;
      adcs.ADC_Resolution = ADC_Resolution_12b;
      adcs.ADC_ExternalTrigConvEvent = ADC_ExternalTrigConvEvent_0;//ADC_ExternalTrigConvEvent_7
      adcs.ADC_ExternalTrigEventEdge = ADC_ExternalTrigEventEdge_None;
      adcs.ADC_DataAlign = ADC_DataAlign_Right;
      adcs.ADC_OverrunMode = ADC_OverrunMode_Disable;
      adcs.ADC_AutoInjMode = ADC_AutoInjec_Disable;
      adcs.ADC_NbrOfRegChannel = 1;
      ADC_Init(ADC1, &adcs);
      cs.ADC_Clock = ADC_Clock_AsynClkMode;
      cs.ADC_Mode  = ADC_Mode_Independent;//ADC_Mode_Interleave;
      cs.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;;
      cs.ADC_DMAMode = ADC_DMAMode_Circular;
      cs.ADC_TwoSamplingDelay = 0;
      ADC_CommonInit(ADC1, &cs);

      //Tconv = Sampling time + 12.5 ADC clock cycles (12.5+Sampling)/64M
      ADC_RegularChannelConfig(ADC1, ADC_Channel_3, 1, ADC_SampleTime_61Cycles5);//ADC_SampleTime_1Cycles5

      ADC_Cmd(ADC1, ENABLE);
}

void adc1_watchDog_cfg(void)
{

      ADC_AnalogWatchdog1SingleChannelConfig(ADC1,ADC_Channel_3);
      ADC_AnalogWatchdog1ThresholdsConfig(ADC1,400,0);
      ADC_AnalogWatchdogCmd(ADC1,ADC_AnalogWatchdog_SingleRegEnable);
      ADC_ITConfig(ADC1,ADC_IT_AWD1,ENABLE);
}

void ad_gpio_cfg(void)
{
      GPIO_InitTypeDef gs;

      RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
      // RCC_AHB1PeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
      gs.GPIO_Mode = GPIO_Mode_AN;
      gs.GPIO_OType = GPIO_OType_PP;
      gs.GPIO_PuPd = GPIO_PuPd_NOPULL;
      gs.GPIO_Speed = GPIO_Speed_50MHz;
      //PA1--->ADC1_IN2 PA2--->ADC1_IN3 PA4--->ADC2_IN1
      gs.GPIO_Pin = GPIO_Pin_2|GPIO_Pin_4;
      GPIO_Init(GPIOA, &gs);
}

void adc_init(void)
{
      //VrefintCal = *((u16 *)(VREFINT_CAL_ADDR));
      ad_gpio_cfg();
      RCC_ADCCLKConfig(RCC_ADC12PLLCLK_Div1);//RCC_ADC12PLLCLK_Div1
      RCC_AHBPeriphClockCmd(RCC_AHBPeriph_ADC12, ENABLE);

      ADC_DeInit(ADC1);
      adc1_init();
      adc1_watchDog_cfg();
      ADC_StartConversion(ADC1);
}

main函数
int main(void)
{
      ...
      while(1)
      {
      ADC_GetConversionValue(ADC1);
      }
      ...
}