STM32F407 双AD+DMA采样，没有采样值读入，求大神解答

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[mw_shl_code=c,true]配置函数如下 [/mw_shl_code] [mw_shl_code=c,true] [/mw_shl_code] [mw_shl_code=c,true] [/mw_shl_code] [mw_shl_code=c,true]void ADC_Config(void) { ADC_InitTypeDef ADC_InitStructure; ADC_CommonInitTypeDef ADC_CommonInitStructure; DMA_InitTypeDef DMA_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; /* Enable peripheral clocks */ RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_GPIOC, ENABLE); RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_GPIOA, ENABLE); RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_DMA2 , ENABLE); RCC_APB2PeriphClockCmd( RCC_APB2Periph_ADC1 , ENABLE); RCC_APB2PeriphClockCmd( RCC_APB2Periph_ADC2 , 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); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ; GPIO_Init(GPIOA, &GPIO_InitStructure); RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1,ENABLE); //ADC1复位 RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1,DISABLE); //复位结束 RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC2,ENABLE); //ADC2复位 RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC2,DISABLE); //复位结束 /* DMA2 Stream0 channel 0 configuration */ DMA_InitStructure.DMA_Channel = DMA_Channel_0; DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1->DR; DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&ADC_output; DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory; DMA_InitStructure.DMA_BufferSize = FFT_LENGTH; 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_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_Stream 0 enable */ DMA_Cmd(DMA2_Stream0, ENABLE); /******************************************************************************/ /* ADCs configuration: double interleaved with 6cycles delay to reach 5Msps */ /******************************************************************************/ /* ADC Common configuration *************************************************/ ADC_CommonInitStructure.ADC_Mode = ADC_DualMode_Interl; ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_6Cycles; ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_3; ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2; ADC_CommonInit(&ADC_CommonInitStructure); /* DMA mode 3 is used in interleaved mode in 6-bit or 8-bit resolutions */ ADC_InitStructure.ADC_Resolution = ADC_Resolution_8b; /* ADC1 regular channel 12 configuration ************************************/ ADC_InitStructure.ADC_ScanConvMode = DISABLE; ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None; ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1; ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; ADC_InitStructure.ADC_NbrOfConversion = 1; ADC_Init(ADC1, &ADC_InitStructure); /* ADC1 regular channel 12 configuration */ ADC_RegularChannelConfig(ADC1, ADC_Channel_3, 1, ADC_SampleTime_3Cycles); /* ADC2 regular channel 12 configuration ************************************/ ADC_Init(ADC2, &ADC_InitStructure); /* ADC2 regular channel 12 configuration */ ADC_RegularChannelConfig(ADC2, 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); } [/mw_shl_code]

mzwhhwj

触发定时器开了没有？

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回复【2楼】mzwhhwj:
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