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基于STM32单片机的智能电烤箱温度控制器(加定时)原理图PCB

article 2025/6/29 0:04:10

功能介绍：
0.本系统采用STM32F103C8T6作为单片机
1.采用LCD1602可以实时显示烤箱的温度和时间
2.蜂鸣器和LED组成的声光报警系统，当烤箱时间达到时作为报警提示装置
3.设计WiFi模块作为无线通信，可与手机进行数据传输
4.温度检测模块采用的是max6675+热电偶，测量温度可达几百度
5.继电器+功率电阻来模拟烤箱加热的过程
6.采用DC002作为电源接口可直接输入5V给整个系统供电

原理图：
在这里插入图片描述

PCB：
在这里插入图片描述

主程序：

#define __MIAN_C
#include "main.h"// 局部变量，用于保存转换计算后的电压值
CreatByte Flag;
enum _MODE_DF_ dispMode;char dis[16];
uint16_t tempBuf = 0;
float f_temp = 0;
volatile uint16_t setIndex = 0;
volatile uint16_t setTemp = 50;
volatile int16_t timeLimit[2] = {5, 0}; //默认5分钟
volatile int16_t timeLimitBuf[2] = {5, 0}; //用于缓存上次的定时时间
PID_Calibration_Def PID_Calibration;
PID_State_Def PID_State;int main(void)
{setFlag = 0;// 使用HSI，SYSCLK = 4M * RCC_PLLMul_x, x:[2,3,...16],最高是64MHHSI_SetSysClock(RCC_PLLMul_2); //使用内部8MHz晶振，并设置PLL输出为8MHz// 端口初始化GPIO_Config();GENERAL_TIM_Init();USART_Config();MAX6675_GPIO_Init();DelayMs(1000);printf("AT+CIPMUX=1\r\n"); //打开多连接DelayMs(1000);printf("AT+CIPSERVER=1,8080\r\n"); //建立服务 端口号为8080DelayMs(1000);Key_GPIO_Config();DelayMs(200);LCD_GPIO_Init();LCD_Init();LCD_Clear();DelayMs(200);Set_PID_Parameter();while (1){if (refreshFlag == 1){refreshFlag = 0;if (startFlag == 1) //开启加热{PID_State.actual = f_temp;  //当前温度PID_State.target = setTemp; //目标温度PID_State = PID_Iterate(PID_Calibration, PID_State);if ((f_temp > setTemp - 5) && (f_temp < setTemp + 5)) //在范围内{BUZZER_OFF;}else{BUZZER_ON;}}else{PID_State.output = 0;BUZZER_OFF;}if (setFlag == 0){RefreshData();DispSet(setIndex);}}if (sendFlag == 1){sendFlag = 0;TIM_ITConfig(GENERAL_TIM2, TIM_IT_Update, DISABLE);SendData();TIM_ITConfig(GENERAL_TIM2, TIM_IT_Update, ENABLE);}KeyProcess();}
}void Set_PID_Parameter(void)
{PID_Calibration.kp = 20;PID_Calibration.ki = 2;PID_Calibration.kd = 10;PID_State.actual = 0;PID_State.target = 50;PID_State.integral = 0;PID_State.last_error = 0;PID_State.previous_error = 0;PID_State.output = 0;
}  void RefreshData(void)
{uint8_t i;for (i = 0; i < 10; i++) //采集10次数据{//获取温度do{tempBuf = ReadMAX6675();} while (GetCurrentTemp(tempBuf));tempBuf &= 0x7ff8;tempBuf >>= 3;                                         //取D14~D3有效数据f_temp = f_temp + (float)tempBuf * 1023.75 / 4096 - 0; //减去合适的环境温度DelayMs(2);}f_temp = f_temp / 10;sprintf(dis, "Temp: %6.1f", f_temp);LCD_DispStr(0, 1, dis);LCD_DispOneChar(12, 1, 0xdf);LCD_DispOneChar(13, 1, 'C');
}void SendData(void)
{printf("AT+CIPSEND=0,29\r\n"); //发送32位数据DelayMs(100);printf("SetTemp:%4d'C Temp:%6.1f'C\r\n", setTemp, f_temp); //串口发送DelayMs(100);
}void DispSet(uint8_t setIndex)
{sprintf(dis, "S:%4d", setTemp);LCD_DispStr(0, 0, dis);LCD_DispOneChar(6, 0, 0xdf);LCD_DispOneChar(7, 0, 'C');sprintf(dis, "%02d:%02d", timeLimit[0], timeLimit[1]); LCD_DispStr(9, 0, dis); //显示定时时间if (startFlag == 1) //开启状态{LCD_DispOneChar(15, 0, 'O');}else //关闭状态{LCD_DispOneChar(15, 0, 'C');}if (setIndex == 1){LCD_SetCursor(10, 0, 1);}else if (setIndex == 2){LCD_SetCursor(13, 0, 1);}
}
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