求救,关于STM32F205VC的AD转换，按官网固件改的代码，AD不启动

void HW_ADC_Configuration(void)

{

    DMA_InitTypeDef DMA_InitStructure;

    ADC_InitTypeDef       ADC_InitStructure;

    ADC_CommonInitTypeDef ADC_CommonInitStructure;

    NVIC_InitTypeDef NVIC_InitStructure;



    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);

    RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1, ENABLE);



    DMA_DeInit(DMA2_Stream0);

    while (DMA_GetCmdStatus(DMA2_Stream0) != DISABLE);



    DMA_InitStructure.DMA_Channel = DMA_Channel_0;

    DMA_InitStructure.DMA_Memory0BaseAddr = (INT32U)uADCTEMP;

    DMA_InitStructure.DMA_PeripheralBaseAddr = (INT32U)(&(ADC1->DR));;

    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;

    DMA_InitStructure.DMA_BufferSize = ADC_BUFF_SIZE;

    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);



    DMA_ITConfig(DMA2_Stream0, DMA_IT_TC, ENABLE);

    DMA_Cmd(DMA2_Stream0, DISABLE);



    // Enable ADC1_DMA interrput IRQ channel

    NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream0_IRQn;

    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;          //指定抢占式优先级别0

    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;                 //指定响应优先级别0

    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

    NVIC_Init(&NVIC_InitStructure);



    DMA_Cmd(DMA2_Stream0, ENABLE);



    ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;

    ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div8;

    ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;

    ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_20Cycles;

    ADC_CommonInit(&ADC_CommonInitStructure);



    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_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;

    ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;

    ADC_InitStructure.ADC_NbrOfConversion = ADC_BUFF_SIZE;

    ADC_Init(ADC1, &ADC_InitStructure);



    ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_480Cycles);

    ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 2, ADC_SampleTime_480Cycles);

    ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 3, ADC_SampleTime_480Cycles);

    ADC_RegularChannelConfig(ADC1, ADC_Channel_3, 4, ADC_SampleTime_480Cycles);

    ADC_RegularChannelConfig(ADC1, ADC_Channel_4, 5, ADC_SampleTime_480Cycles);

    ADC_RegularChannelConfig(ADC1, ADC_Channel_5, 6, ADC_SampleTime_480Cycles);

    ADC_RegularChannelConfig(ADC1, ADC_Channel_6, 7, ADC_SampleTime_480Cycles);

    ADC_RegularChannelConfig(ADC1, ADC_Channel_7, 8, ADC_SampleTime_480Cycles);



    ADC_DMACmd(ADC1, ENABLE);

    ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);

    ADC_Cmd(ADC1, ENABLE);

    ADC_SoftwareStartConv(ADC1);

}

void ADC_DMA_IRQ(void)

{

    static INT8U counter = 0;

    static INT32U sum[ADC_BUFF_SIZE] = {0};

    INT8U index;



    for(index=0; index<ADC_BUFF_SIZE; index++)

    {

        sum[index] += uADCTEMP[index];

    }

    counter += 1;



    if(counter >= ADC_CHMAX)

    {

        for(index=0; index<ADC_BUFF_SIZE; index++)

        {

            uADCvalue[index] = sum[index]/ADC_CHMAX;

            sum[index] = 0;

        }

        counter = 0;

    }

}

void DMA2_Stream0_IRQHandler(void)

{

    if(DMA_GetITStatus(DMA2_Stream0, DMA_IT_TCIF0) != RESET)

    {

        ADC_DMA_IRQ();

        DMA_ClearITPendingBit(DMA2_Stream0, DMA_IT_TCIF0);

        DMA_ClearFlag(DMA2_Stream0, DMA_IT_TCIF0);

    }

}