stm32写一份光敏电阻模块控制led灯的程序

这里是一个简单的光敏电阻模块控制LED灯的程序，使用STM32的GPIO和ADC模块：

#include "stm32f10x.h"

#define LED_PIN GPIO_Pin_12
#define LED_PORT GPIOA
#define PHOTO_PIN GPIO_Pin_0
#define PHOTO_PORT GPIOB
#define PHOTO_ADC ADC1
#define PHOTO_CHANNEL ADC_Channel_8

void GPIO_Init(void);
void ADC_Init(void);
void delay(uint32_t time);

int main(void)
{
    GPIO_Init();
    ADC_Init();

    while (1)
    {
        // 读取光敏电阻模块的ADC值
        ADC_SoftwareStartConv(PHOTO_ADC);
        while (!ADC_GetFlagStatus(PHOTO_ADC, ADC_FLAG_EOC));
        uint16_t adc_value = ADC_GetConversionValue(PHOTO_ADC);

        // 根据ADC值控制LED灯
        if (adc_value > 1000)
            GPIO_SetBits(LED_PORT, LED_PIN);
        else
            GPIO_ResetBits(LED_PORT, LED_PIN);

        delay(100); // 延时100ms
    }
}

void GPIO_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    // LED引脚配置
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
    GPIO_InitStructure.GPIO_Pin = LED_PIN;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_Init(LED_PORT, &GPIO_InitStructure);

    // 光敏电阻引脚配置
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
    GPIO_InitStructure.GPIO_Pin = PHOTO_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(PHOTO_PORT, &GPIO_InitStructure);
}

void ADC_Init(void)
{
    ADC_InitTypeDef ADC_InitStructure;

    // ADC时钟配置
    RCC_ADCCLKConfig(RCC_PCLK2_Div6);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);

    // ADC配置
    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(PHOTO_ADC, &ADC_InitStructure);

    // ADC通道配置
    ADC_RegularChannelConfig(PHOTO_ADC, PHOTO_CHANNEL, 1, ADC_SampleTime_55Cycles5);

    // ADC启动
    ADC_Cmd(PHOTO_ADC, ENABLE);
}

void delay(uint32_t time)
{
    uint32_t i;
    for (i = 0; i < time * 1000; i++);
}

该程序使用了GPIO和ADC模块，首先需要对GPIO和ADC进行初始化。在主循环中，程序先读取光敏电阻模块的ADC值，然后根据ADC值控制LED灯的开关状态。最后通过延时函数实现循环间隔时间。