stm32f103r6 ADC参考电源为5V，利用ADC对3个通道PA1、PA2和PA3进行连续扫描采样，并通过串口打印三个通道上的模拟电压值。提交keil主函数 ，ADC.c和DMA.c程序

主函数：

#include "stm32f10x.h"
#include "USART.h"
#include "ADC.h"
#include "DMA.h"

int main(void)
{
    USART1_Config();
    ADC1_DMA_Config();

    while (1)
    {
        printf("ADC value of PA1: %d\r\n", ADCConvertedValue[0]);
        printf("ADC value of PA2: %d\r\n", ADCConvertedValue[1]);
        printf("ADC value of PA3: %d\r\n", ADCConvertedValue[2]);
        printf("\r\n");
        Delay_ms(1000);
    }
}

ADC.c：

#include "stm32f10x.h"
#include "ADC.h"

uint16_t ADCConvertedValue[3];

void ADC1_Config(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    ADC_InitTypeDef ADC_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_ADC1, ENABLE);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
    ADC_InitStructure.ADC_ScanConvMode = ENABLE;
    ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
    ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
    ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
    ADC_InitStructure.ADC_NbrOfChannel = 3;
    ADC_Init(ADC1, &ADC_InitStructure);

    ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_239Cycles5);
    ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 2, ADC_SampleTime_239Cycles5);
    ADC_RegularChannelConfig(ADC1, ADC_Channel_3, 3, ADC_SampleTime_239Cycles5);

    ADC_Cmd(ADC1, ENABLE);

    ADC_ResetCalibration(ADC1);
    while (ADC_GetResetCalibrationStatus(ADC1));

    ADC_StartCalibration(ADC1);
    while (ADC_GetCalibrationStatus(ADC1));
}

void ADC1_DMA_Config(void)
{
    DMA_InitTypeDef DMA_InitStructure;

    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

    DMA_DeInit(DMA1_Channel1);

    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)(&ADC1->DR);
    DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&ADCConvertedValue;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
    DMA_InitStructure.DMA_BufferSize = 3;
    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);

    ADC_DMACmd(ADC1, ENABLE);

    ADC1_Config();
}

DMA.c：

#include "stm32f10x.h"
#include "DMA.h"

void DMA_Config(void)
{
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

    DMA_DeInit(DMA1_Channel1);

    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)(&USART1->DR);
    DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)TxBuffer;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
    DMA_InitStructure.DMA_BufferSize = TxCounter;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
    DMA_Init(DMA1_Channel4, &DMA_InitStructure);

    DMA_ITConfig(DMA1_Channel4, DMA_IT_TC, ENABLE);
}

void DMA1_Channel4_IRQHandler(void)
{
    if (DMA_GetITStatus(DMA1_IT_TC4))
    {
        DMA_Cmd(DMA1_Channel4, DISABLE);

        TxCounter = 0;

        DMA_ClearITPendingBit(DMA1_IT_TC4);
    }
}