STM32F1串口和光敏都能控制灯的代码

以下是一个使用STM32F1的串口和光敏控制灯的代码示例：

#include "stm32f10x.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"
#include "stm32f10x_usart.h"
#include "stm32f10x_adc.h"

#define LED_PIN GPIO_Pin_13
#define LED_GPIO_PORT GPIOC
#define LED_GPIO_CLK RCC_APB2Periph_GPIOC

#define USART1_CLK RCC_APB2Periph_USART1
#define USART1_GPIO_CLK (RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO)
#define USART1_TX_PIN GPIO_Pin_9
#define USART1_RX_PIN GPIO_Pin_10
#define USART1_GPIO GPIOA

#define ADC_CLK RCC_APB2Periph_ADC1
#define ADC_GPIO_PIN GPIO_Pin_0
#define ADC_GPIO_PORT GPIOA
#define ADC_GPIO_CLK RCC_APB2Periph_GPIOA
#define ADC_CHANNEL ADC_Channel_0

USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
ADC_InitTypeDef ADC_InitStructure;

void GPIO_Configuration(void);
void USART1_Configuration(void);
void ADC_Configuration(void);

int main(void)
{
    uint16_t adc_value = 0;
    uint8_t uart_data = 0;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
    RCC_APB2PeriphClockCmd(LED_GPIO_CLK, ENABLE);
    RCC_APB2PeriphClockCmd(USART1_GPIO_CLK, ENABLE);
    RCC_APB2PeriphClockCmd(USART1_CLK, ENABLE);
    RCC_APB2PeriphClockCmd(ADC_CLK, ENABLE);

    GPIO_Configuration();
    USART1_Configuration();
    ADC_Configuration();

    while (1)
    {
        // 读取串口数据
        if (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == SET)
        {
            uart_data = USART_ReceiveData(USART1);
            if (uart_data == '1')
            {
                GPIO_SetBits(LED_GPIO_PORT, LED_PIN);
            }
            else if (uart_data == '0')
            {
                GPIO_ResetBits(LED_GPIO_PORT, LED_PIN);
            }
        }

        // 读取光敏电阻值
        ADC_SoftwareStartConvCmd(ADC1, ENABLE);
        while (ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC) == RESET);
        adc_value = ADC_GetConversionValue(ADC1);

        // 根据光敏电阻值控制灯
        if (adc_value < 1000)
        {
            GPIO_SetBits(LED_GPIO_PORT, LED_PIN);
        }
        else
        {
            GPIO_ResetBits(LED_GPIO_PORT, LED_PIN);
        }
    }
}

void GPIO_Configuration(void)
{
    GPIO_InitStructure.GPIO_Pin = LED_PIN;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_Init(LED_GPIO_PORT, &GPIO_InitStructure);
}

void USART1_Configuration(void)
{
    GPIO_InitStructure.GPIO_Pin = USART1_TX_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(USART1_GPIO, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = USART1_RX_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(USART1_GPIO, &GPIO_InitStructure);

    USART_InitStructure.USART_BaudRate = 9600;
    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_Rx | USART_Mode_Tx;
    USART_Init(USART1, &USART_InitStructure);
    USART_Cmd(USART1, ENABLE);
}

void ADC_Configuration(void)
{
    GPIO_InitStructure.GPIO_Pin = ADC_GPIO_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(ADC_GPIO_PORT, &GPIO_InitStructure);

    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);

    ADC_RegularChannelConfig(ADC1, ADC_CHANNEL, 1, ADC_SampleTime_55Cycles5);

    ADC_Cmd(ADC1, ENABLE);
    ADC_ResetCalibration(ADC1);
    while (ADC_GetResetCalibrationStatus(ADC1));
    ADC_StartCalibration(ADC1);
    while (ADC_GetCalibrationStatus(ADC1));
}

该代码使用USART1和光敏电阻控制LED。当串口接收到字符'1'时，LED亮起；当接收到字符'0'时，LED熄灭。同时，通过ADC读取光敏电阻的值，如果小于1000则LED亮起，否则LED熄灭。需要注意的是，该代码中的光敏电阻必须连接到ADC1的PA0通道上。