stm32光照度和按键控制灯光

要实现光照度和按键控制灯光，可以使用以下步骤：

1. 连接光敏电阻模块和按键模块到STM32开发板上。

2. 在STM32开发板上编写程序，读取光敏电阻模块的输出值，根据光照强度的不同，控制LED灯的亮度。

3. 设置按键模块的输入引脚为中断输入，当按键被按下时，触发中断，根据中断事件来控制LED灯的开关。

以下是一个简单的代码示例，可以实现按键控制LED灯的开关和光照度控制LED灯的亮度：

#include "stm32f10x.h"

#define LED_PIN GPIO_Pin_13
#define LED_PORT GPIOC

#define KEY_PIN GPIO_Pin_0
#define KEY_PORT GPIOA

#define ADC_PIN GPIO_Pin_1
#define ADC_PORT GPIOA
#define ADC_CHANNEL ADC_Channel_1

void GPIO_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOA, ENABLE);

    GPIO_InitStructure.GPIO_Pin = LED_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(LED_PORT, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = KEY_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(KEY_PORT, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = ADC_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(ADC_PORT, &GPIO_InitStructure);
}

void ADC_Configuration(void)
{
    ADC_InitTypeDef ADC_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);

    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_239Cycles5);

    ADC_Cmd(ADC1, ENABLE);
}

void TIM_Configuration(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

    TIM_TimeBaseStructure.TIM_Period = 999;
    TIM_TimeBaseStructure.TIM_Prescaler = 71;
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = 0;
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OC2Init(TIM3, &TIM_OCInitStructure);

    TIM_Cmd(TIM3, ENABLE);
}

int main(void)
{
    uint16_t adc_value = 0;
    uint32_t key_state = 0;
    uint32_t led_state = 0;
    uint32_t last_key_state = 0;

    GPIO_Configuration();
    ADC_Configuration();
    TIM_Configuration();

    while (1)
    {
        adc_value = ADC_GetConversionValue(ADC1);

        if (adc_value > 2000) // 光照度强
        {
            TIM_SetCompare2(TIM3, 500); // LED灯亮度最大
        }
        else // 光照度弱
        {
            TIM_SetCompare2(TIM3, 0); // LED灯亮度最小
        }

        key_state = GPIO_ReadInputDataBit(KEY_PORT, KEY_PIN);

        if (key_state != last_key_state)
        {
            if (key_state == 0) // 按键按下
            {
                if (led_state == 0) // LED灯关闭
                {
                    GPIO_ResetBits(LED_PORT, LED_PIN);
                    led_state = 1;
                }
                else // LED灯打开
                {
                    GPIO_SetBits(LED_PORT, LED_PIN);
                    led_state = 0;
                }
            }
            last_key_state = key_state;
        }
    }
}

这个代码示例中，使用了定时器PWM来控制LED灯的亮度，也可以用DAC模块来实现，具体实现方法可以根据实际需要进行调整。