功能介绍：
0.本系统采用STC89C52作为单片机
1.系统实时显示当前的日期/时间，循环显示当前的温度/继电器控制状态
2.按键可设定温度，可控制继电器开关，系统设置了三路继电器，可以分别控制三种不同的家用设备
3.温度传感器采用的型号是常见的DS18B20，该传感器精度和测温范围都良好
4.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：
PCB ：
主程序：
#include "main.h"/*******************变量定义*********************/ enum _MODE_DF_ dispMode; bit modeFlag = AUTO; //模式标记 uchar setIndex = 0;bit dispFlag = 0;float temperature;bit relay1Flag = 0; bit relay2Flag = 0; bit relay3Flag = 0;char dis[16];/******************************************************** 函数名称:void mian() 函数作用:主函数 参数说明: ********************************************************/ void main() {modeFlag = MANUAL;Timer0_Init(); //初始化定时器0DS1302_Init(); //初始化DS1302LCD_Init(); //初始化液晶DelayMs(200); //延时有助于稳定LCD_DispStr(4, 0, "Welcome!");DelayS(1);LCD_Clear(); //清屏while (1) //死循环{if (dispFlag == 1){dispFlag = 0;Relay_Ctrl();if (dispMode == NORMAL){DispNormal();}}KeyProcess();} }/*------------------------------------------------定时器初始化子程序 ------------------------------------------------*/ void Timer0_Init(void) {TMOD |= 0x01; //使用模式1，16位定时器，使用"|"符号可以在使用多个定时器时不受影响TH0 = (65536 - 9216) / 256; //重新赋值 10msTL0 = (65536 - 9216) % 256;EA = 1; //总中断打开ET0 = 1; //定时器中断打开TR0 = 1; //定时器开关打开 } /*------------------------------------------------定时器中断子程序 ------------------------------------------------*/ void Timer0_Interrupt(void) interrupt 1 {static unsigned int time10ms = 0;TH0 = (65536 - 9216) / 256; //重新赋值 10msTL0 = (65536 - 9216) % 256;time10ms++;if (time10ms > 50){time10ms = 0;dispFlag = 1; //显示标志} }void DispNormal(void) {static int tempBuf = 0;static unsigned char cnt = 0;DS1302_ReadTime();switch (timeBufDec[7]){case 1: sprintf(dis, "%02d/%02d/%02d Sun. ", (int)timeBufDec[1], (int)timeBufDec[2], (int)timeBufDec[3]); break;case 2: sprintf(dis, "%02d/%02d/%02d Mon. ", (int)timeBufDec[1], (int)timeBufDec[2], (int)timeBufDec[3]); break;case 3: sprintf(dis, "%02d/%02d/%02d Tue. ", (int)timeBufDec[1], (int)timeBufDec[2], (int)timeBufDec[3]); break;case 4: sprintf(dis, "%02d/%02d/%02d Wed. ", (int)timeBufDec[1], (int)timeBufDec[2], (int)timeBufDec[3]); break;case 5: sprintf(dis, "%02d/%02d/%02d Thur. ", (int)timeBufDec[1], (int)timeBufDec[2], (int)timeBufDec[3]); break;case 6: sprintf(dis, "%02d/%02d/%02d Fri. ", (int)timeBufDec[1], (int)timeBufDec[2], (int)timeBufDec[3]); break;case 7: sprintf(dis, "%02d/%02d/%02d Sat. ", (int)timeBufDec[1], (int)timeBufDec[2], (int)timeBufDec[3]); break;default: sprintf(dis, "%02d/%02d/%02d Sun. ", (int)timeBufDec[1], (int)timeBufDec[2], (int)timeBufDec[3]); break;}LCD_DispStr(0, 0, dis);while(!DS18B20_Start());DS18B20_GetTemp(&tempBuf);temperature = (float)tempBuf * 0.0625;sprintf(dis, "%02d:%02d:%02d ", (int)timeBufDec[4], (int)timeBufDec[5], (int)timeBufDec[6]);LCD_DispStr(0, 1, dis);cnt++;if (cnt < 5) //定时显示温度{sprintf(dis, "%5.1f", temperature);LCD_DispStr(9, 1, dis);LCD_DispOneChar(14, 1, 0xdf); //℃LCD_DispOneChar(15, 1, 'C');}else if (cnt < 10) //定时显示继电器状态{if (relay1Flag == 1){LCD_DispStr(9, 1, " 1o");}else{LCD_DispStr(9, 1, " 1c");}if (relay2Flag == 1){LCD_DispStr(12, 1, "2o");}else{LCD_DispStr(12, 1, "2c");}if (relay3Flag == 1){LCD_DispStr(14, 1, "3o");}else{LCD_DispStr(14, 1, "3c");}}else{cnt = 0;}}void Relay_Ctrl(void) {if (relay1Flag == 1){RELAY_1 = ON;}else{RELAY_1 = OFF;}if (relay2Flag == 1){RELAY_2 = ON;}else{RELAY_2 = OFF;}if (relay3Flag == 1){RELAY_3 = ON;}else{RELAY_3 = OFF;} }void DispSetRealTime(unsigned char setIndex) {sprintf(dis, "%02d/%02d/%02d", (int)timeBufDec[1], (int)timeBufDec[2], (int)timeBufDec[3]);LCD_DispStr(0, 0, dis);switch (timeBufDec[7]){case 1: LCD_DispStr(10, 0, " Sun."); break;case 2: LCD_DispStr(10, 0, " Mon."); break;case 3: LCD_DispStr(10, 0, " Tue."); break;case 4: LCD_DispStr(10, 0, " Wed."); break;case 5: LCD_DispStr(10, 0, "Thur."); break;case 6: LCD_DispStr(10, 0, " Fri."); break;case 7: LCD_DispStr(10, 0, " Sat."); break;default: LCD_DispStr(10, 0, " Sun."); break;}sprintf(dis, " %02d:%02d:%02d ", (int)timeBufDec[4], (int)timeBufDec[5], (int)timeBufDec[6]);LCD_DispStr(0, 1, dis);switch (setIndex){case 1: LCD_SetCursor(1, 0, 1); break;case 2: LCD_SetCursor(4, 0, 1); break;case 3: LCD_SetCursor(7, 0, 1); break;case 4: LCD_SetCursor(14, 0, 1); break;case 5: LCD_SetCursor(5, 1, 1); break;case 6: LCD_SetCursor(8, 1, 1); break;case 7: LCD_SetCursor(11, 1, 1); break;default:break;} }
仿真演示视频：
https://www.bilibili.com/video/BV1D5411X7jE/
实物演示视频：
https://www.bilibili.com/video/BV1y841147bY/
