STM32F303 DMA ADC4

[T. K. (tntbc)]

Hallo,

ich versuche den ADC4 mit DMA in gang zu nehmen. Leider funktioniert es 
nicht. Ich verwende die DMA2_Channel_4 und führe vorher ein DMARemapping 
durch jedoch ohne Erfolg! Wenn ich den ADC1 mit der gleichen Config 
starte geht alles super. Der ADC macht etwas das sehe ich über den 
Debugger nur leider tut die DMA nichts. Weiß einer von euch wo der 
Fehler liegt?

void ADC_VoltageInit(){
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2,ENABLE);

  RCC_AHBPeriphClockCmd(RCC_AHBENR_ADC34EN,ENABLE);
  RCC_AHBPeriphClockCmd(RCC_AHBENR_GPIOBEN,ENABLE);

  GPIO_InitADC.GPIO_Mode = GPIO_Mode_AN;
  GPIO_InitADC.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_InitADC.GPIO_Pin = GPIO_Pin_12;
  GPIO_Init(GPIOB,&GPIO_InitADC);

  RCC_ADCCLKConfig(RCC_ADC34PLLCLK_Div1); 
  ADC_Init(ADC4,&ADC_Struct);
  ADC_VoltageRegulatorCmd(ADC4,ENABLE);
  Delay(10);//Warte auf den Regulator;
  ADC_SelectCalibrationMode(ADC4,ADC_CalibrationMode_Single);
  ADC_StartCalibration(ADC4);
  while(ADC_GetCalibrationStatus(ADC4) != RESET);



  nvicADC.NVIC_IRQChannelCmd = ENABLE;      
  nvicADC.NVIC_IRQChannelPreemptionPriority = 1; 
  nvicADC.NVIC_IRQChannelSubPriority = 1;    
  nvicADC.NVIC_IRQChannel = DMA2_Channel4_IRQn;
  NVIC_Init(&nvicADC);

  SYSCFG_DMAChannelRemapConfig(SYSCFG_DMARemap_ADC2ADC4,ENABLE);

  ADC_Def.ADC_Clock = ADC_Clock_AsynClkMode;
  ADC_Def.ADC_Mode = ADC_Mode_Independent;
  ADC_Def.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
  ADC_Def.ADC_DMAMode = ADC_DMAMode_Circular;
  ADC_Def.ADC_TwoSamplingDelay = 0;
  ADC_CommonInit(ADC4,&ADC_Def);

  ADC_Struct.ADC_ContinuousConvMode = ADC_ContinuousConvMode_Enable;
  ADC_Struct.ADC_Resolution = ADC_Resolution_10b;
  ADC_Struct.ADC_ExternalTrigConvEvent = ADC_ExternalTrigConvEvent_0;
  ADC_Struct.ADC_ExternalTrigEventEdge = ADC_ExternalTrigEventEdge_None;
  ADC_Struct.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_Struct.ADC_OverrunMode = ADC_OverrunMode_Disable;
  ADC_Struct.ADC_AutoInjMode = ADC_AutoInjec_Disable;
  ADC_Struct.ADC_NbrOfRegChannel = 1;

  ADC_Init(ADC4,&ADC_Struct);
  ADC_RegularChannelConfig(ADC4,ADC_Channel_3,1,ADC_SampleTime_7Cycles5);
  dmaADCInit.DMA_BufferSize = ADC_LNG;
  dmaADCInit.DMA_DIR = DMA_DIR_PeripheralSRC;
  dmaADCInit.DMA_M2M = DMA_M2M_Disable;
  dmaADCInit.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
  dmaADCInit.DMA_MemoryInc = DMA_MemoryInc_Enable;
  dmaADCInit.DMA_Mode = DMA_Mode_Normal;
  dmaADCInit.DMA_PeripheralDataSize = DMA_MemoryDataSize_HalfWord;
  dmaADCInit.DMA_PeripheralInc = DMA_MemoryInc_Disable;
  dmaADCInit.DMA_Priority = DMA_Priority_Medium;
  dmaADCInit.DMA_MemoryBaseAddr = (uint32_t)ADC3ConvertedValue;
  dmaADCInit.DMA_PeripheralBaseAddr = (uint32_t)&ADC4->DR;

  DMA_Init(DMA2_Channel4,&dmaADCInit);
  DMA_ITConfig(DMA2_Channel4,DMA2_IT_TC4,ENABLE);

  ADC_DMAConfig(ADC4,ADC_DMAMode_OneShot);
  ADC_DMACmd(ADC4,ENABLE);
  ADC_Cmd(ADC4,ENABLE);

  while(!ADC_GetFlagStatus(ADC4, ADC_FLAG_RDY));
  DMA_Cmd(DMA2_Channel4,ENABLE);
  ADC_StartConversion(ADC4);
}