STM32的ADC（DMA）在数码管上无法显示值

Question

数码管的程序是正确的，配置程序也是仿照例程写的，有哪位前辈遇到过类似的问题呢
DMA循环读数，ADC循环采样

int main(void)
{

    extern __IO uint32_t ADC_ConvertedValue;
    __IO uint16_t ADC_ConvertedValue2;
    __IO uint16_t ADC_ConvertedValueLocal=15;


    NumInit();          
    SysTickInit();  
    ADC1_Init();        
    Timer3Init();
    Timer3Delay_ms(100);



while(1)
    {
            ADC_ConvertedValue2=ADC_ConvertedValue&0x0000FFFF;
            ADC_ConvertedValueLocal=(int)ADC_ConvertedValue2/4096*3300;
            SetNumDisplayDecimal(ADC_ConvertedValueLocal);  //值显示在数码管上
    }//End of While(1)
} 

#include "adc.h"

#define ADC1_DR_Address    ((u32)0x40012400+0x4c)

__IO uint32_t ADC_ConvertedValue;
//__IO u16 ADC_ConvertedValueLocal;



 void ADC1_GPIO_Config(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    /* Enable DMA clock */
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

    /* Enable ADC1 and GPIOC clock */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOA, ENABLE);

    /* Configure PA6  as analog input */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; 
    GPIO_Init(GPIOA, &GPIO_InitStructure);          
}


 void ADC1_Mode_Config(void)
{
    DMA_InitTypeDef DMA_InitStructure;
    ADC_InitTypeDef ADC_InitStructure;

    /* DMA channel1 configuration */
    DMA_DeInit(DMA1_Channel1);
    DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;  
    DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ADC_ConvertedValue;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
    DMA_InitStructure.DMA_BufferSize = 1;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;  
    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);

    /* Enable DMA channel1 */
    DMA_Cmd(DMA1_Channel1, ENABLE);

    /* ADC1 configuration */

    ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;  
    ADC_InitStructure.ADC_ScanConvMode = DISABLE ;  
    ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;  
    ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; 
    ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;  
    ADC_InitStructure.ADC_NbrOfChannel = 1;     
    ADC_Init(ADC1, &ADC_InitStructure);

    //ADC_TempSensorVrefintCmd(ENABLE);

    /*ÅäÖÃADCʱÖÓ£¬ÎªPCLK2µÄ8·ÖƵ£¬¼´9Hz*/
    RCC_ADCCLKConfig(RCC_PCLK2_Div8); 
    /*ÅäÖÃADC1µÄͨµÀ6Ϊ55.  5¸ö²ÉÑùÖÜÆÚ£¬ÐòÁÐΪ1 */ 
    ADC_RegularChannelConfig(ADC1, ADC_Channel_6, 1, ADC_SampleTime_55Cycles5);

    /* Enable ADC1 DMA */
    ADC_DMACmd(ADC1, ENABLE);

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


    ADC_ResetCalibration(ADC1);

    while(ADC_GetResetCalibrationStatus(ADC1));

    ADC_StartCalibration(ADC1);

    while(ADC_GetCalibrationStatus(ADC1));


    ADC_SoftwareStartConvCmd(ADC1, ENABLE);
}


void ADC1_Init(void)
{
    ADC1_GPIO_Config();
    ADC1_Mode_Config();
}

Answer 1

你先把采集到的ADC通过串口打印出来看数据是否正确 然后再调试SEG显示代码 找出错误原因 希望对你有帮助！！