STM32F303 DMA2 ADC3 数据错误问题

只看该作者 · 2014-5-27 14:29

代码如下。

代码如下。
/******************************************************************************
* Function Name: ADC_DMA_Config
* Description: DMA配置
* Input:
* Output:
* Return:
******************************************************************************/
void ADC_DMA_Config3(void)
{
//             DMA_InitTypeDef DMA_InitStructure;
            RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);

            DMA_DeInit(DMA2_Channel5);
   // DMA_StructInit(&DMA_InitStructure_ADC3);
            DMA_InitStructure_ADC3.DMA_PeripheralBaseAddr = (uint32_t)&(ADC3->DR); //外设首地址ADC1_BASE+0x4C ADC1_CDRADC3_4->CDR
            DMA_InitStructure_ADC3.DMA_MemoryBaseAddr = (uint32_t)&ADC_ConvertedValue_NO3;  //自己定义的存储区
            DMA_InitStructure_ADC3.DMA_DIR = DMA_DIR_PeripheralSRC; //数据传输外设到内存

            DMA_InitStructure_ADC3.DMA_BufferSize = ADCOUTNBUFFLENGTH;//数据大小12
            DMA_InitStructure_ADC3.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //外设地址寄存器地址自动增加地址禁止
            DMA_InitStructure_ADC3.DMA_MemoryInc = DMA_MemoryInc_Enable; //内存地址自动增加

            DMA_InitStructure_ADC3.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //外设数据大小

            DMA_InitStructure_ADC3.DMA_MemoryDataSize = DMA_PeripheralDataSize_HalfWord;  //内存数据大小，同上
            DMA_InitStructure_ADC3.DMA_Mode = DMA_Mode_Circular;    //DMA循环传输
            DMA_InitStructure_ADC3.DMA_Priority = DMA_Priority_High; //高优先级

//       DMA_DoubleBufferModeConfig(DMA2_Stream0, (uint32_t)ADC_ConvertedValue_NO2, DMA_Memory_1);
//       DMA_DoubleBufferModeCmd(DMA2_Stream0, ENABLE);

      DMA_Init(DMA2_Channel5, &DMA_InitStructure_ADC3);
            DMA_Cmd(DMA2_Channel5, ENABLE);    //使能DMA2_Stream0??

//             DMA_ITConfig(DMA2_Channel5, DMA_IT_TC, ENABLE);

}
void ADC_Config3(void)
{
ADC_InitTypeDef ADC_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_ADC34, ENABLE);
//添加一步初始化
         ADC_DeInit(ADC3);
//       ADC_StructInit(&ADC_InitStructure);
// ADC_CommonStructInit(&ADC_CommonInitStructure);
//

  /* Calibration procedure */
  ADC_VoltageRegulatorCmd(ADC3, ENABLE);

  /* Insert delay equal to 10 */
  DelayUS(10);

  ADC_SelectCalibrationMode(ADC3, ADC_CalibrationMode_Single);
  ADC_StartCalibration(ADC3);

  while(ADC_GetCalibrationStatus(ADC3) != RESET );
  calibration_value = ADC_GetCalibrationValue(ADC3);

//       ADC_InitStructure.ADC_AutoInjMode          =
ADC_InitStructure.ADC_ContinuousConvMode    = ADC_ContinuousConvMode_Enable;
ADC_InitStructure.ADC_DataAlign             = ADC_DataAlign_Right;
ADC_InitStructure.ADC_ExternalTrigConvEvent = ADC_ExternalTrigConvEvent_0;
ADC_InitStructure.ADC_ExternalTrigEventEdge = ADC_ExternalTrigEventEdge_None;
ADC_InitStructure.ADC_NbrOfRegChannel       = 6;
ADC_InitStructure.ADC_OverrunMode          = ADC_OverrunMode_Disable;
   ADC_InitStructure.ADC_AutoInjMode          = ADC_AutoInjec_Disable;
ADC_InitStructure.ADC_Resolution             = ADC_Resolution_12b;
ADC_Init(ADC3, &ADC_InitStructure);

ADC_CommonInitStructure.ADC_Clock          = ADC_Clock_AsynClkMode;
ADC_CommonInitStructure.ADC_DMAAccessMode    = ADC_DMAAccessMode_Disabled;
ADC_CommonInitStructure.ADC_DMAMode          = ADC_DMAMode_Circular;
ADC_CommonInitStructure.ADC_Mode             =  ADC_Mode_Independent ;
ADC_CommonInitStructure.ADC_TwoSamplingDelay  = 5;
ADC_CommonInit(ADC3,&ADC_CommonInitStructure);
      /* ADC1 Regular Channel1 Configuration */
      ADC_RegularChannelConfig(ADC3, ADC_Channel_2, 1,  ADC_SampleTime_7Cycles5);//ADC_SampleTime_55Cycles5);
      ADC_RegularChannelConfig(ADC3, ADC_Channel_13,  2,  ADC_SampleTime_7Cycles5);//ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(ADC3, ADC_Channel_6,  3,  ADC_SampleTime_7Cycles5);//ADC_SampleTime_55Cycles5);
      ADC_RegularChannelConfig(ADC3, ADC_Channel_14,  4,  ADC_SampleTime_7Cycles5);//ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(ADC3, ADC_Channel_15, 5,  ADC_SampleTime_7Cycles5);//ADC_SampleTime_55Cycles5);
      ADC_RegularChannelConfig(ADC3, ADC_Channel_16, 6,  ADC_SampleTime_7Cycles5);//ADC_SampleTime_55Cycles5);


ADC_DMA_Config3();
ADC_DMAConfig(ADC3,ADC_DMAMode_Circular);
ADC_DMACmd(ADC3, ENABLE);          /* Enable ADC1's DMA interface       */

   /* Enable ADC2 external trigger conversion */
// ADC_ExternalTrigConvCmd(ADC4, ENABLE);

ADC_Cmd(ADC3, ENABLE);          /* Enable ADC1                      */

//       /* Start ADC1 calibaration */
      ADC_StartCalibration(ADC3);
//////       /* Check the end of ADC1 calibration */
////////       while(ADC_GetCalibrationStatus(ADC4));
      while(!ADC_GetFlagStatus(ADC3, ADC_FLAG_RDY));
      ADC_StartConversion(ADC3);/* Start ADC1 Software Conversion*/
//ADC_StopConversion(ADC4);

}
结果数据只能拿到6个，我的ADCDMABUFF大小是12
数据时6个0xDBE6之类的数据，长度和数据都不对，ADC3->DR寄存器数据测试是对的。就是传到DMA的ADC_ConvertedValue_NO3数组不对了。调试了很久,时钟也是打开了，网上F303的资料太少，不知道错误出在哪里。芯片是STM32F303VC。看看论坛中的高手能否相助，或者提供点思路。
这个代码，带入到ADC2 ,ADC4中，测试，全是对的。唯独在ADC3这个上出问题。ADC3寄存器数据读取出来是对的。DMA过来就出问题了。