ADC bei STM 32 mehrere Werte abtasten mit DMA

#include "stm32f4xx.h"

#include "stm32f4xx_adc.h"

#include "stm32f4xx_dma.h"

#include "stm32f4xx_gpio.h"

#include "stm32f4xx_rcc.h"

#define ADC_CDR_ADDRESS    ((uint32_t)0x40012308)

__IO uint32_t ADCTripleConvertedValue[300];

ADC_InitTypeDef       ADC_InitStructure;

ADC_CommonInitTypeDef ADC_CommonInitStructure;

DMA_InitTypeDef       DMA_InitStructure;

GPIO_InitTypeDef      GPIO_InitStructure;

int main(void)

{

  /******************************************************************************/

  /*               ADCs interface clock, pin and DMA configuration              */

  /******************************************************************************/

    /* Enable peripheral clocks */

    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2 | RCC_AHB1Periph_GPIOC, ENABLE);

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_ADC2 |

                           RCC_APB2Periph_ADC3, ENABLE);

    /* Configure ADC Channel 12 pin as analog input */

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;

    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;

    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;

    GPIO_Init(GPIOC, &GPIO_InitStructure);

    /* DMA2 Stream0 channel0 configuration */

    DMA_InitStructure.DMA_Channel = DMA_Channel_0;

    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC_CDR_ADDRESS;

    DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&ADCTripleConvertedValue;

    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;

    DMA_InitStructure.DMA_BufferSize = 300;

    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;

    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;

    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;

    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;

    DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;

    DMA_InitStructure.DMA_Priority = DMA_Priority_High;

    DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;

    DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;

    DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;

    DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;

    DMA_Init(DMA2_Stream0, &DMA_InitStructure);

    /* DMA2_Stream0 enable */

    DMA_Cmd(DMA2_Stream0, ENABLE);

    /******************************************************************************/

    /*  ADCs configuration: triple interleaved with 5cycles delay to reach 6Msps  */

    /******************************************************************************/

      /* ADC Common configuration *************************************************/

      ADC_CommonInitStructure.ADC_Mode = ADC_TripleMode_Interl;

      ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;

      ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_2;

      ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2;

      ADC_CommonInit(&ADC_CommonInitStructure);

      /* ADC1 regular channel 12 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_RegularChannelConfig(ADC1, ADC_Channel_12, 1, ADC_SampleTime_3Cycles);

      /* Enable ADC1 DMA */

      ADC_DMACmd(ADC1, ENABLE);

      /* ADC2 regular channel 12 configuration ************************************/

      ADC_Init(ADC2, &ADC_InitStructure);

      /* ADC2 regular channel12 configuration */

      ADC_RegularChannelConfig(ADC2, ADC_Channel_12, 1, ADC_SampleTime_3Cycles);

      /* ADC3 regular channel 12 configuration ************************************/

      ADC_Init(ADC3, &ADC_InitStructure);

      /* ADC3 regular channel12 configuration */

      ADC_RegularChannelConfig(ADC3, ADC_Channel_12, 1, ADC_SampleTime_3Cycles);

      /* Enable DMA request after last transfer (multi-ADC mode) ******************/

      ADC_MultiModeDMARequestAfterLastTransferCmd(ENABLE);

      /* Enable ADC1 **************************************************************/

      ADC_Cmd(ADC1, ENABLE);

      /* Enable ADC2 **************************************************************/

      ADC_Cmd(ADC2, ENABLE);

      /* Enable ADC3 **************************************************************/

      ADC_Cmd(ADC3, ENABLE);

      /* Start ADC1 Software Conversion */

      ADC_SoftwareStartConv(ADC1);

    while(1)

    {

    }

}