DMA+adc+定时器触发数据读取不出来？

桂电学子

ad读取不出来，感觉是dma没工作，去掉dma部分是正常的,读出来都是0000000000



u32 DMA_AD[250][3]={0};


void adcv_init(void)
{
        ADC_InitTypeDef ADC_InitStructure;
        GPIO_InitTypeDef GPIO_InitStructure;
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |RCC_APB2Periph_ADC1        , ENABLE );          //
        RCC_ADCCLKConfig(RCC_PCLK2_Div6);   //

        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
//         GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
//         GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
        GPIO_Init(GPIOA, &GPIO_InitStructure);       

       
        ADC_DeInit(ADC1);

       
        ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
        ADC_InitStructure.ADC_ScanConvMode = ENABLE;         
        ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
        ADC_InitStructure.ADC_ExternalTrigConv =  ADC_ExternalTrigConv_T2_CC2;
        ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
        ADC_InitStructure.ADC_NbrOfChannel = 3;
        ADC_Init(ADC1, &ADC_InitStructure);       
         
          ADC_RegularChannelConfig(ADC1, ADC_Channel_5, 1, ADC_SampleTime_7Cycles5 );                        
                ADC_RegularChannelConfig(ADC1, ADC_Channel_6, 2, ADC_SampleTime_7Cycles5 );                        
                ADC_RegularChannelConfig(ADC1, ADC_Channel_7, 3, ADC_SampleTime_7Cycles5 );                        

        ADC_Cmd(ADC1, ENABLE);
        ADC_ResetCalibration(ADC1);        //  
        while(ADC_GetResetCalibrationStatus(ADC1)) ;        //
        ADC_StartCalibration(ADC1);         //¿aÆôADD￡×¼
        while(ADC_GetCalibrationStatus(ADC1));         //
        ADC_ExternalTrigConvCmd(ADC1,ENABLE);   //
  ADC_DMACmd(ADC1, ENABLE);          //
        adcDMA();
  TIM2_Int_Init(40,20);

}


void TIM2_Int_Init(u16 arr,u16 psc)
{
        TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
        TIM_OCInitTypeDef TIM_OCInitStructure;       

        RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE); //
       
        TIM_TimeBaseInitStructure.TIM_Prescaler=71;  //é
        TIM_TimeBaseInitStructure.TIM_CounterMode=TIM_CounterMode_Up; //
        TIM_TimeBaseInitStructure.TIM_Period=arr;  //
        TIM_TimeBaseInitStructure.TIM_ClockDivision=0; //
        TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitStructure);
       
        TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_Low;
        TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1;
        TIM_OCInitStructure.TIM_Pulse=psc;
        TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;
       
  TIM_OC2Init(TIM2, &TIM_OCInitStructure);

        TIM_ARRPreloadConfig(TIM2, ENABLE);   
  TIM_InternalClockConfig(TIM2);   
        TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable);
//         TIM_UpdateDisableConfig(TIM2, DISABLE);
        TIM_Cmd(TIM2,ENABLE);
        TIM_SelectOutputTrigger(TIM2, TIM_TRGOSource_OC2Ref);
//         TIM_CtrlPWMOutputs(TIM2,ENABLE);
       
       
}

#define ADC1_DR_Address ((u32)0x40012400+0x4c)
void adcDMA(void)
{
        NVIC_InitTypeDef NVIC_InitStructure;  
  DMA_InitTypeDef DMA_InitStructure;
        RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
  DMA_DeInit(DMA1_Channel1);     //
        DMA_InitStructure.DMA_PeripheralBaseAddr=(u32)&ADC1->DR;  //
        DMA_InitStructure.DMA_MemoryBaseAddr=(u32)&DMA_AD[0][0];          //′
        DMA_InitStructure.DMA_DIR= DMA_DIR_PeripheralSRC;
        DMA_InitStructure.DMA_BufferSize=        (u32)3;
        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_M2M= DMA_M2M_Disable;               
        DMA_Init(DMA1_Channel1, &DMA_InitStructure);
        DMA_Cmd(DMA1_Channel1, ENABLE);       
       

    NVIC_InitStructure.NVIC_IRQChannel =DMA1_Channel1_IRQn;   
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;  
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;   
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;  
    NVIC_Init(&NVIC_InitStructure);   
}