stm32温度控制系统降温代码

以下是一个简单的stm32温度控制系统降温的示例代码，你可以根据自己的需求进行修改和优化：

#include "stm32f10x.h"

#define TARGET_TEMP 30 // 目标温度
#define PWM_FREQ 100 // PWM输出频率
#define PWM_MAX_DUTY 1000 // PWM输出最大占空比

void ADC_Configuration(void);
void TIM_Configuration(void);
void PWM_Configuration(void);

int main(void)
{
    int current_temp = 0; // 当前温度
    int pwm_duty = 0; // 当前PWM输出占空比

    ADC_Configuration(); // 配置ADC模块
    TIM_Configuration(); // 配置定时器
    PWM_Configuration(); // 配置PWM输出

    while (1)
    {
        // 读取温度值
        ADC_SoftwareStartConvCmd(ADC1, ENABLE);
        while (!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC));
        current_temp = ADC_GetConversionValue(ADC1);

        // 比较温度值
        if (current_temp > TARGET_TEMP)
        {
            // 控制降温
            pwm_duty = (current_temp - TARGET_TEMP) * PWM_MAX_DUTY / 100;
            TIM_SetCompare1(TIM2, pwm_duty);
        }
        else
        {
            // 停止PWM输出
            TIM_SetCompare1(TIM2, 0);
        }
    }
}

// 配置ADC模块
void ADC_Configuration(void)
{
    ADC_InitTypeDef ADC_InitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOA, ENABLE);

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

    // 配置ADC模块
    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通道采样时间
    ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_28Cycles5);

    ADC_Cmd(ADC1, ENABLE);
}

// 配置定时器
void TIM_Configuration(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

    // 配置定时器
    TIM_TimeBaseStructure.TIM_Period = 1000 / PWM_FREQ - 1;
    TIM_TimeBaseStructure.TIM_Prescaler = 7200 - 1;
    TIM_TimeBaseStructure.TIM_ClockDivision = 0;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

    TIM_Cmd(TIM2, ENABLE);
}

// 配置PWM输出
void PWM_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);

    // 配置PWM输出引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置PWM输出
    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_OC1Init(TIM2, &TIM_OCInitStructure);
    TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable);
}

在该示例代码中，使用ADC模块读取温度传感器的值，并通过PWM控制PA1引脚输出降温信号，其中PWM输出频率为100Hz，PWM输出占空比由当前温度与目标温度的差值决定。