GD32qq群知识整理-1-GD32 AD转换的数据都为0的问题

/*******************************************************************************

** Function name:   ADC_Configuration    

**

** Descriptions :   AD配置

**  

*******************************************************************************/

void ADC_Configuration(void)

{

        ADC_InitTypeDef ADC_InitStructure;

        

        ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;

        ADC_InitStructure.ADC_ScanConvMode = ENABLE;

        ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; //不连续转换

        ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;

        ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;

        ADC_InitStructure.ADC_NbrOfChannel = 2;

        ADC_Init(ADC1, &ADC_InitStructure);



        ADC_RegularChannelConfig(ADC1, ADC_Channel_8, 1, ADC_SampleTime_239Cycles5);

        ADC_RegularChannelConfig(ADC1, ADC_Channel_9, 2, ADC_SampleTime_239Cycles5);

        ADC_Cmd(ADC1, ENABLE);

        ADC_DMACmd(ADC1, ENABLE);

        ADC_ResetCalibration(ADC1);

        while(ADC_GetResetCalibrationStatus(ADC1));

        ADC_StartCalibration(ADC1);

        while(ADC_GetCalibrationStatus(ADC1));



        ADC_SoftwareStartConvCmd(ADC1, ENABLE);

}

/*******************************************************************************

** Function name:   DMA_Configuration    

**

** Descriptions :   DMA配置   用于传送AD值

**  

*******************************************************************************/

void DMA_Configuration(void)

{

        DMA_InitTypeDef  DMA_InitStructure;

        

        DMA_DeInit(DMA1_Channel1);

        DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;

        DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&AD_Value;

        DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;

        DMA_InitStructure.DMA_BufferSize = 2;

        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_M2M = DMA_M2M_Disable;

        DMA_Init(DMA1_Channel1, &DMA_InitStructure);



        DMA_Cmd(DMA1_Channel1, ENABLE);

}

【103】趴趴熊(177150456) 21:07:33 

你又不是定时器触发，单次转换当然不行

【103】趴趴熊(177150456) 21:08:27 

Ad的第二次转换才有效