编写stm32f103c8t6利用AD采集电压信号并通过串口输出的程序

下面是一个简单的示例程序，可以利用STM32F103C8T6芯片内置的ADC模块采集电压信号，并通过串口输出。在此示例程序中，我们使用PA0引脚作为ADC输入，USART1串口进行数据输出。

#include "stm32f10x.h"
#include "stdio.h"

void ADC_Configuration(void);
void USART1_Configuration(void);
void USART1_SendChar(uint8_t ch);

int main(void)
{
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);

    ADC_Configuration();
    USART1_Configuration();

    while (1)
    {
        ADC_SoftwareStartConvCmd(ADC1, ENABLE);
        while (!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC));
        uint16_t adc_value = ADC_GetConversionValue(ADC1);
        float voltage = 3.3 * adc_value / 4096;
        printf("ADC Value: %d, Voltage: %.2fV\r\n", adc_value, voltage);
        for (int i = 0; i < 1000000; i++);  // 延时一段时间
    }
}

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

    // 配置ADC通道的GPIO
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

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

    // 配置ADC通道
    ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_239Cycles5);

    // 启用ADC
    ADC_Cmd(ADC1, ENABLE);

    // 校准ADC
    ADC_ResetCalibration(ADC1);
    while (ADC_GetResetCalibrationStatus(ADC1));
    ADC_StartCalibration(ADC1);
    while (ADC_GetCalibrationStatus(ADC1));
}

void USART1_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;

    // 配置USART1的GPIO
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置USART1
    USART_InitStructure.USART_BaudRate = 115200;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_InitStructure.USART_StopBits = USART_StopBits_1;
    USART_InitStructure.USART_Parity = USART_Parity_No;
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStructure.USART_Mode = USART_Mode_Tx;
    USART_Init(USART1, &USART_InitStructure);

    // 启用USART1
    USART_Cmd(USART1, ENABLE);
}

void USART1_SendChar(uint8_t ch)
{
    USART_SendData(USART1, ch);
    while (!USART_GetFlagStatus(USART1, USART_FLAG_TXE));
}

需要注意的是，这个程序只是一个简单的示例，如果需要更精确的电压测量，可能需要在程序中进行一些调整和优化。