[MCU] 【RISC-V MCU CH32V103测评】+ DMA传输ADC转换结果

/*******************************************************************************
* Function Name  : ADC_Function_Init
* Description    : Initializes ADC collection.
* Input          : None
* Return         : None
*******************************************************************************/
void ADC_Function_Init(void)
{
    ADC_InitTypeDef ADC_InitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE );
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE );
    RCC_ADCCLKConfig(RCC_PCLK2_Div8);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    ADC_DeInit(ADC1);
    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_Cmd(ADC1, ENABLE);
    ADC_DMACmd(ADC1, ENABLE); // ADC DMA 使能

    ADC_ResetCalibration(ADC1);
    while(ADC_GetResetCalibrationStatus(ADC1));
    ADC_StartCalibration(ADC1);
    while(ADC_GetCalibrationStatus(ADC1));


}

/*******************************************************************************
* Function Name  : DMA_Tx_Init
* Description    : Initializes the DMAy Channelx configuration.
* Input          : DMA_CHx:
*                    x can be 1 to 7.
*                  ppadr: Peripheral base address.
*                  memadr: Memory base address.
*                  bufsize: DMA channel buffer size.
* Return         : None
*******************************************************************************/

void DMA_Tx_Init(void)
{
    DMA_InitTypeDef DMA_InitStructure;

    RCC_AHBPeriphClockCmd( RCC_AHBPeriph_DMA1, ENABLE );

    DMA_DeInit(DMA1_Channel1);
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&ADC1->RDATAR;
    DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&ADC_Value;
    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_HalfWord;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
    DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
    DMA_Init(DMA1_Channel1, &DMA_InitStructure );
    DMA_Cmd(DMA1_Channel1, ENABLE);


}

uint16_t Vrl = 3.3f * ADC_Value / 4095.f;
uint16_t Vrl_t = ((3.3f * ADC_Value / 4095.f)*1000-Vrl);