stm32f303 adc和dma一起使用，DMA只进一次中断问题求解

只看该作者 · 2013-7-2 08:47

本帖最后由 youlongltm 于 2013-7-2 13:19 编辑

配置如下

void ADC_Config(void)
{
      ADC_InitTypeDef    ADC_InitStructure;
      ADC_CommonInitTypeDef ADC_CommonInitStructure;
      uint16_t calibration_value;

      ADC_StructInit(&ADC_InitStructure);
      ADC_VoltageRegulatorCmd(ADC1, ENABLE);
      /* Insert delay equal to 10 us */
   //Delay(10);
   ADC_SelectCalibrationMode(ADC1, ADC_CalibrationMode_Single);
   ADC_StartCalibration(ADC1);

   while(ADC_GetCalibrationStatus(ADC1) != RESET );
   calibration_value = ADC_GetCalibrationValue(ADC1);

      ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
      ADC_CommonInitStructure.ADC_Clock = ADC_Clock_AsynClkMode;
      ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_1;
      ADC_CommonInitStructure.ADC_DMAMode = ADC_DMAMode_Circular;
      ADC_CommonInitStructure.ADC_TwoSamplingDelay = 0x6;
      ADC_CommonInit(ADC1, &ADC_CommonInitStructure);

      ADC_InitStructure.ADC_ContinuousConvMode = ADC_ContinuousConvMode_Enable;
      ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
      ADC_InitStructure.ADC_ExternalTrigConvEvent = ADC_ExternalTrigConvEvent_0;
      ADC_InitStructure.ADC_ExternalTrigEventEdge = ADC_ExternalTrigEventEdge_None;
      ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
      ADC_InitStructure.ADC_OverrunMode = ADC_OverrunMode_Disable;
      ADC_InitStructure.ADC_AutoInjMode = ADC_AutoInjec_Disable;
      ADC_InitStructure.ADC_NbrOfRegChannel = 1;
      ADC_Init(ADC1, &ADC_InitStructure);



      ADC_RegularChannelConfig(ADC1, ADC_Channel_7, 1, ADC_SampleTime_7Cycles5);
      ADC_ITConfig(ADC1, ADC_IT_EOC, DISABLE);
      /* Enable ADC1 */
   ADC_Cmd(ADC1, ENABLE);
   ADC_DMACmd(ADC1, ENABLE);
   /* wait for ADRDY */
   while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_RDY));
   ADC_StartConversion(ADC1);

}

void ADC_DMA_Configuration(void)
{
      DMA_InitTypeDef       DMA_InitStructure;
      DMA_DeInit(DMA1_Channel1);
      DMA_InitStructure.DMA_PeripheralBaseAddr = ADC_CDR_ADDRESS;
      DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&ADCDualConvertedValue;
      DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
      DMA_InitStructure.DMA_BufferSize = 100;
      DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
      DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
      DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
      DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
      DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;//ADC_DMAMode_OneShot;
      DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
      DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
      DMA_Init(DMA1_Channel1, &DMA_InitStructure);

      DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, ENABLE);
      DMA_Cmd(DMA1_Channel1, ENABLE);

}

只看该作者 · 2013-7-2 08:49

自己顶下，配置仿照官方例程，求各位大神指教

只看该作者 · 2013-7-2 08:52

本帖最后由 youlongltm 于 2013-7-2 13:22 编辑

中断服务函数

void DMA1_Channel1_IRQHandler(void)
{
if(DMA_GetITStatus(DMA1_IT_TC1)==SET)
{
            Send_Flag=1;
            GPIO_WriteBit(GPIOE,GPIO_Pin_13,1-GPIO_ReadOutputDataBit(GPIOE,GPIO_Pin_13));
            DMA_ClearITPendingBit(DMA1_IT_TC1);
            DMA_ClearITPendingBit(DMA1_IT_GL1);
            DMA_ClearFlag(DMA1_FLAG_TC1);
}
else
if(DMA_GetITStatus(DMA1_IT_HT1) == SET)
{
      DMA_ClearITPendingBit(DMA1_IT_HT1);
      DMA_ClearITPendingBit(DMA1_IT_GL1);
}
}