ADC模拟看门狗只在初始化时正常检测

1万 · 2020-2-16 15:45

STM32L151C8的ADC模拟看门狗只在初始化时正常检测

1万 · 2020-2-16 15:48

楼主程序可以公开吗？贴程序看下吧，这么说看不出什么原因

2万 · 2020-2-16 15:51

先贴下代码：
/* GPIO 初始化部分 */
      GPIO_InitTypeDef GPIO_InitStructure;       /* MAC Pin */
      GPIO_InitStructure.GPIO_Pin =  MAC_GPIO_PIN;          /* PA0 */
      GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AN;
      GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_NOPULL;
      GPIO_Init(MAC_GPIO_PORT, &GPIO_InitStructure);
/* ADC 模拟看门狗初始化部分 */
   ADC_InitTypeDef ADC_InitStructure;
      /* Enable the HSI */
      RCC_HSICmd(ENABLE);
      /* Wait until HSI oscillator is ready */
      while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);
      /* Enable ADC1 clock */
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
      /* ADC1 Configuration -----------------------------------------------------*/
      ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
      ADC_InitStructure.ADC_ScanConvMode = DISABLE;
      ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
      ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
      ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
      ADC_InitStructure.ADC_NbrOfConversion = 1;
      ADC_Init(ADC1, &ADC_InitStructure);
      ADC_ClearITPendingBit(ADC1, ADC_IT_AWD);
      /* ADC1 regular channel0 configuration */
      ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_4Cycles);
/* Configure channel0 as the single analog watchdog guarded channel */
      ADC_AnalogWatchdogSingleChannelConfig(ADC1, ADC_Channel_0);
      /* Configure high and low analog watchdog thresholds */
      ADC_AnalogWatchdogThresholdsConfig(ADC1, MAC_HIGHER_THRESHOLD, MAC_LOWER_THRESHOLD);//0x16E
      /* Enable analog watchdog on one regular channel: channel0 */
      ADC_AnalogWatchdogCmd(ADC1, ADC_AnalogWatchdog_SingleRegEnable);
      /* Enable AWD interrupt */
      ADC_ITConfig(ADC1, ADC_IT_AWD, ENABLE);

      /* Enable ADC1 */
      ADC_Cmd(ADC1, ENABLE);

      /* Wait until the ADC1 is ready */
      while(ADC_GetFlagStatus(ADC1, ADC_FLAG_ADONS) == RESET)
      {
      }
      /* Start ADC1 Software Conversion */
      ADC_SoftwareStartConv(ADC1);

1万 · 2020-2-16 15:59

还没看到你得问题呢

1万 · 2020-2-16 16:02

ADC模拟看门狗只能在调用初始化时，能够正常的转换电压(接的是3.3V，DR值为0xFFF)，也能够正常的产生看门狗中断；但是初始化完成后当我将对应的管腿接到GND上后，发现DR的值还是0xFFF。再重新将对应的管腿接到3.3V上，DR当然还是0xFFF，但是却再也不会产生看门狗中断。

1万 · 2020-2-16 16:06

若我在初始化时将管腿直接接到GND上，也能够正常的转换当然也不会产生中断；但是当我把对应的管腿接到3.3V时，DR值依旧是0，也不会产生中断？

2万 · 2020-2-16 16:10

楼主试一下换个中断标志看看

1万 · 2020-2-16 16:12

咋换

1万 · 2020-2-16 16:16

ADC_ITConfig(ADC1, ADC_IT_EOC, ENABLE);
void ADC1_IRQHandler(void)
{
  if(ADC_GetITStatus(ADC1, ADC_IT_EOC) != RESET)
  {
ADC_ClearITPendingBit(ADC1, ADC_IT_EOC);