STM32F106C6T6 ADC+DMA数据转换错位？

yuchenglin

STM32F106C6T6 ADC+DMA数据转换错位？ [复制链接]

STM32F106C6T6 ADC+DMA数据转换错位？我转换3个外部通道，一个内部温度。仿真时复位——运行——复位，出现错误的概率在30%。好奇怪，DMA1在其余部分也有用，代码余下：

void ADCInit_DMA(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
 
  // Configure P1.1.2.3 as analog input 
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
 
  RCC_ADCCLKConfig(RCC_PCLK2_Div4); // cofigure ADC clock = PCLK2/4, PLLCLK /4

  // DMA1 channel1 configuration
  DMA_DeInit(DMA1_Channel1);
  DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
  DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ADCConvertBuf;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
  DMA_InitStructure.DMA_BufferSize = 40;
  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;
  DMA_InitStructure.DMA_Priority = DMA_Priority_Low;
  DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
  DMA_Init(DMA1_Channel1, &DMA_InitStructure);
 
  // Enable DMA1 channel1
  DMA_Cmd(DMA1_Channel1, ENABLE);
    
  // ADC1 configuration 
  ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
  ADC_InitStructure.ADC_ScanConvMode = ENABLE;
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_NbrOfChannel = 4;
  ADC_Init(ADC1, &ADC_InitStructure);
 
  // Enables the temperature sensor and Vrefint channel
  ADC_TempSensorVrefintCmd( ENABLE );

  // ADC1 regular channel 1,2,3,16 configuration 
  ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_239Cycles5);  // co
  ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 2, ADC_SampleTime_239Cycles5);  // smoke
  ADC_RegularChannelConfig(ADC1, ADC_Channel_3, 3, ADC_SampleTime_239Cycles5);  // batter
  ADC_RegularChannelConfig(ADC1, ADC_Channel_16,4, ADC_SampleTime_239Cycles5);  // internel temperature sensor
 
  // Enable ADC1 DMA 
  ADC_DMACmd(ADC1, ENABLE);

   // Enable ADC1 
  ADC_Cmd(ADC1, ENABLE);
 
  // Enable ADC1 reset calibaration register   
  ADC_ResetCalibration(ADC1);
  // Check the end of ADC1 reset calibration register
  while(ADC_GetResetCalibrationStatus(ADC1));

  // Start ADC1 calibaration 
  ADC_StartCalibration(ADC1);
  // Check the end of ADC1 calibration 
  while(ADC_GetCalibrationStatus(ADC1));
 
  // Test on DMA1 channel1 transfer complete flag
  while(!DMA_GetFlagStatus(DMA1_FLAG_TC1));
  // Clear DMA1 channel1 transfer complete flag
  DMA_ClearFlag(DMA1_FLAG_TC1);
 
  // Start ADC1 Software Conversion 
  ADC_SoftwareStartConvCmd(ADC1, ENABLE);
 
}

yixindianzi

我有这个STM32F106C6T6，芯片的资料