用单片机实现恒温箱代码

以下是一个基于STM32单片机的简单恒温箱代码实现示例，仅供参考：

#include "stm32f10x.h"
#include "delay.h"
#include "lcd.h"
#include "ds18b20.h"

#define HEAT_PIN GPIO_Pin_0
#define COOL_PIN GPIO_Pin_1

#define TEMP_SET 25.0
#define TEMP_MAX 30.0
#define TEMP_MIN 20.0

float temp_current = 0.0;

void GPIO_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
    GPIO_InitStructure.GPIO_Pin = HEAT_PIN | COOL_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
}

void TIM_Configuration(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
    TIM_TimeBaseStructure.TIM_Period = 1000 - 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_ITConfig(TIM2, TIM_IT_Update, ENABLE);
    TIM_Cmd(TIM2, ENABLE);
}

void TIM2_IRQHandler(void)
{
    if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
    {
        temp_current = DS18B20_GetTemp();
        TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
    }
}

void Heat_On(void)
{
    GPIO_SetBits(GPIOA, HEAT_PIN);
}

void Heat_Off(void)
{
    GPIO_ResetBits(GPIOA, HEAT_PIN);
}

void Cool_On(void)
{
    GPIO_SetBits(GPIOA, COOL_PIN);
}

void Cool_Off(void)
{
    GPIO_ResetBits(GPIOA, COOL_PIN);
}

int main(void)
{
    GPIO_Configuration();
    TIM_Configuration();
    LCD_Init();
    DS18B20_Init();
    while (1)
    {
        delay_ms(1000);
        LCD_Clear();
        LCD_WriteString("Temp: ");
        LCD_WriteFloat(temp_current, 2);
        if (temp_current > TEMP_MAX)
        {
            Heat_Off();
            Cool_On();
            LCD_WriteString("Cooling");
        }
        else if (temp_current < TEMP_MIN)
        {
            Heat_On();
            Cool_Off();
            LCD_WriteString("Heating");
        }
        else
        {
            if (temp_current < TEMP_SET)
            {
                Heat_On();
                Cool_Off();
                LCD_WriteString("Heating");
            }
            else if (temp_current > TEMP_SET)
            {
                Heat_Off();
                Cool_On();
                LCD_WriteString("Cooling");
            }
            else
            {
                Heat_Off();
                Cool_Off();
                LCD_WriteString("Stable");
            }
        }
    }
}

该代码使用了STM32的定时器和GPIO模块来控制加热和制冷器的开关状态，并且使用了DS18B20温度传感器模块来获取当前的温度值。通过LCD模块来实现温度的显示。代码中的PID控制算法可以根据实际需求进行添加和修改。