stm32adc采集dac的数据_STM32实例DAC数模转换实验

好的，以下是一个简单的STM32实例DAC数模转换实验，采用ADC采集DAC输出的数据。

首先，我们需要初始化DAC和ADC，以及配置ADC的DMA传输。

#include "stm32f4xx.h"

#define ADC_DR_ADDRESS    ((uint32_t)0x4001204C)

void DAC_ADC_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    DAC_InitTypeDef  DAC_InitStructure;
    ADC_InitTypeDef  ADC_InitStructure;
    DMA_InitTypeDef  DMA_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    /* Enable GPIOA clock */
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
    /* Configure PA4 (DAC1) in analog mode */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    /* Enable DAC clock */
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
    /* Configure DAC */
    DAC_InitStructure.DAC_Trigger = DAC_Trigger_None;
    DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
    DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
    DAC_Init(DAC_Channel_1, &DAC_InitStructure);
    /* Enable DAC Channel1 */
    DAC_Cmd(DAC_Channel_1, ENABLE);

    /* Enable ADC1 clock */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
    /* Configure PA5 (ADC1 Channel 5) in analog mode */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    /* Configure ADC1 */
    ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
    ADC_InitStructure.ADC_ScanConvMode = DISABLE;
    ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
    ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
    ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
    ADC_InitStructure.ADC_NbrOfChannel = 1;
    ADC_Init(ADC1, &ADC_InitStructure);
    /* ADC1 regular channel5 configuration */
    ADC_RegularChannelConfig(ADC1, ADC_Channel_5, 1, ADC_SampleTime_480Cycles);

    /* Enable DMA1 clock */
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);
    /* DMA1 Stream0 channel0 configuration */
    DMA_InitStructure.DMA_Channel = DMA_Channel_0;
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC_DR_ADDRESS;
    DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t) &ADCConvertedValue;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
    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_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(DMA1_Stream0, &DMA_InitStructure);
    /* Enable DMA1 Stream0 */
    DMA_Cmd(DMA1_Stream0, ENABLE);

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

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

    /* Enable ADC1 reset calibration register */   
    ADC_ResetCalibration(ADC1);
    while(ADC_GetResetCalibrationStatus(ADC1));

    /* Start ADC1 calibration */
    ADC_StartCalibration(ADC1);
    while(ADC_GetCalibrationStatus(ADC1));
}

然后，我们需要编写一个函数来设置DAC输出的电压值。

void Set_DAC_Voltage(uint16_t value)
{
    DAC_SetChannel1Data(DAC_Align_12b_R, value);
    DAC_SoftwareTriggerCmd(DAC_Channel_1, ENABLE);
}

最后，我们可以编写一个函数来读取ADC采集到的DAC输出的电压值。

uint16_t Get_ADC_Voltage(void)
{
    return ADCConvertedValue;
}

我们可以在主函数中调用这些函数来进行实验。

int main(void)
{
    DAC_ADC_Init();

    while (1)
    {
        Set_DAC_Voltage(2048);
        uint16_t adc_value = Get_ADC_Voltage();
        // 处理采集到的ADC数值
    }
}

这样，我们就可以进行STM32实例DAC数模转换实验了。