F4的ADC的双重模式DMA传输

hi我歌月徘徊 · 发表于 2016-11-7 10:45:43

使用ADC1\ADC2的双重模式，DMA传输，每个ADC三个通道，但是发现ADC的三个通道正常，ADC2的没有数据。请大神指点
[mw_shl_code=applescript,true]__IO uint16_t uhADCConvertedValue[6];
#define ADC1_CDR_ADDRESS ADC1_BASE+0X300+0X08
void adc_init()
{
ADC_InitTypeDef    ADC_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;
DMA_InitTypeDef    DMA_InitStructure;
GPIO_InitTypeDef    GPIO_InitStructure;
/* ê1Äüíaéèê±Öó */
   RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2 | RCC_AHB1Periph_GPIOA, ENABLE);
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_ADC2, ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_PIN_V1|GPIO_PIN_V2|GPIO_PIN_V3|GPIO_PIN_A1|GPIO_PIN_A2|GPIO_PIN_A3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* DMA2 Stream0 channel0 */
   DMA_InitStructure.DMA_Channel = DMA_Channel_0;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_CDR_ADDRESS;
DMA_InitStructure.DMA_Memory0BaseAddr =  (unsigned int)uhADCConvertedValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = 3;
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_PeripheralDataSize_HalfWord;
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);
DMA_Cmd(DMA2_Stream0, ENABLE);

/* ADC Common ÅäÖÃ ----------------------------------------------------------*/
ADC_CommonInitStructure.ADC_Mode = ADC_DualMode_RegSimult;
ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2;
ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_2;//根据数据手册 mode2适用于双重ADC模式
ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
ADC_CommonInit(&ADC_CommonInitStructure);

/* ADC1 regular channel 12 configuration ************************************/
   ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ScanConvMode = ENABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfConversion = 3;

   /* ADC1 1æÔòí¨μàÅäÖÃ -------------------------------------------------------*/
ADC_Init(ADC1, &ADC_InitStructure);
ADC_RegularChannelConfig(ADC1, ADC_Channel_3, 1, ADC_SampleTime_15Cycles);
ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 2, ADC_SampleTime_15Cycles);
ADC_RegularChannelConfig(ADC1, ADC_Channel_5, 3, ADC_SampleTime_15Cycles);
/* ADC2 1æÔòí¨μàÅäÖÃ -------------------------------------------------------*/
ADC_Init(ADC2, &ADC_InitStructure);
ADC_RegularChannelConfig(ADC2, ADC_Channel_1, 1, ADC_SampleTime_15Cycles);
ADC_RegularChannelConfig(ADC2, ADC_Channel_4, 2, ADC_SampleTime_15Cycles);
ADC_RegularChannelConfig(ADC2, ADC_Channel_6, 3, ADC_SampleTime_15Cycles);

   /* ê1Äü ADC1 DMA */
ADC_DMACmd(ADC1, ENABLE);
ADC_DMACmd(ADC2, ENABLE);

/* ê1ÄüDMAÇëÇó (¶àADCÄ￡ê½)*/
ADC_MultiModeDMARequestAfterLastTransferCmd(ENABLE);

/* ê1Äü ADC1 */
ADC_Cmd(ADC1, ENABLE);

/* ê1Äü ADC2 */
ADC_Cmd(ADC2, ENABLE);

/* èí¼tÆô¶ˉADC×a»» */
ADC_SoftwareStartConv(ADC1);
}[/mw_shl_code]

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