单片机万年历（LCD显示屏，温度传感器，喇叭，按键功能）

#include <reg51.h>
#include <intrins.h>#define uchar unsigned char//简写
#define uint  unsigned int//简写unsigned char code table[]="MONTUEWEDTHUFRISATSUN";//星期
unsigned char table2[]="0123456789";//子模
unsigned char displaytemp[16];//数组
unsigned int hour=0;//时
unsigned int min=0;//分
unsigned int sec=0;//秒
unsigned int count;//计数
unsigned int date=5;//日
unsigned int monse=11;//月
unsigned int year=2019;//年
unsigned int i;//计数
signed int temp;//温度函数使用
float temperature;//温度函数使用sbit RS=P2^0;
sbit RW=P2^1;
sbit EN=P2^2;
sbit DQ=P2^6;
sbit speak01 = P3^0;//声音sbit k1=P1^0;
sbit k2=P1^1;
sbit k3=P1^2;
sbit plusOne=P1^3;//加
sbit decrement=P1^4;//减void delay(unsigned char com){//延时函数unsigned int i;for(i=com;i>0;i--);
}void DelayUs2x(unsigned char t)//延时函数
{   while(--t);
}void DelayMs(unsigned char t)//延时函数
{while(t--){DelayUs2x(245);DelayUs2x(245);}
}bit Init_DS18B20(void)
{bit dat=0;DQ = 1;    //DQ复位DelayUs2x(5);   //延时DQ = 0;         //拉低总线DelayUs2x(250); //不小于 480usDQ = 1;        //释放总线DelayUs2x(50); //15~60us dat=DQ;        //读18b20响应DelayUs2x(200); //延时使间隙不小于480usreturn dat;
}unsigned char ReadOneChar(void)
{
unsigned char i=0;
unsigned char dat = 0;
for (i=8;i>0;i--){DQ = 0; //拉低dat>>=1;  //DQ = 1; // 释放总线
DelayUs2x(1); if(DQ)dat|=0x80;DelayUs2x(25); //读间隙不小于60us}return(dat);
}void WriteOneChar(unsigned char dat)
{unsigned char i=0;for (i=8; i>0; i--){DQ = 0;       // 拉低DQ = dat&0x01; //写最低位DelayUs2x(25);  //延时DQ = 1;        //释放dat>>=1;}}unsigned int ReadTemperature(void)
{
unsigned char a=0;
unsigned int b=0;
unsigned int t=0;
Init_DS18B20();
WriteOneChar(0xCC); //ROM忽略
WriteOneChar(0x44); // 温度转换
Init_DS18B20();
WriteOneChar(0xCC); // ROM忽略
WriteOneChar(0xBE); //读暂存器
a=ReadOneChar();   //第一个字节
b=ReadOneChar();   //第二个字节
b<<=8;
t=a+b;
return(t);
}void write_com(unsigned char com){//写指令函数P0= com;RS=0;RW=0;EN=1;delay(200);EN=0;
}void write_dat(unsigned char dat){//写数据函数P0=dat;RS=1;RW=0;EN=1;delay(200);EN=0;
}void init(){//初始化write_com(0x01);//清屏write_com(0x38);//设置16*2显示，5*7点阵write_com(0x0c);//开显示write_com(0x06);//地址加1，写入数据时光标右移一位
}void LCD_clear(void) //清屏函数{ write_com(0x01); DelayMs(5);}void speak(void){//扬声器函数unsigned int i;for(i=0;i<100;i++)speak01=!speak01;delay(10000);speak01=0;
}void shop(){//按键函数if(k1==0&&k2==0&&k3==0){if(plusOne==0){i=i+3;if(i==21)//若满8后将置一i=0;}}if(k1==0&&k3==0){//条件2个或以上的放前面，没有条件放最后if(plusOne==0){min++;while(plusOne==0);}if(decrement==0){min--;while(decrement==0);}}if(k2==0&&k3==0){if(plusOne==0){sec=0;while(plusOne==0);}if(decrement==0){sec=0;while(decrement==0);}}if(k1==0){if(plusOne==0){monse++;while(plusOne==0);}if(decrement==0){monse--;while(decrement==0);}}if(k2==0){if(plusOne==0){date++;while(plusOne==0);}if(decrement==0){date--;while(decrement==0);}}if(k3==0){if(plusOne==0){hour++;while(plusOne==0);}if(decrement==0){hour--;while(decrement==0);}}if(plusOne==0)year++;while(plusOne==0);if(decrement==0)year--;while(decrement==0);
}void inter() interrupt 1{//定时T0的中断函数，装载初值50MS溢出计数20次为1STH0=0x3c;TL0=0xb0;count++;if(count>=20){count=0;sec++;}if(sec>=60){sec=0;min++;}if(min>=60){min=0;hour++;}if(hour>=24){hour=0;date++;}if(date>31){date=0;monse++;}if(monse>12){monse=1;year++;}if(min==0&&sec==0){speak();delay(100);}}void display_LCD(){//LCD的具体输入函数write_com(0x80);write_dat(' ');write_dat(table2[(year/1000)]);write_dat(table2[(year%1000/100)]);write_dat(table2[(year%100/10)]);write_dat(table2[(year%10)]);write_dat('-');write_dat(table2[(monse/10)]);write_dat(table2[(monse%10)]);write_dat('-');write_dat(table2[(date/10)]);write_dat(table2[(date%10)]);write_dat(' ');write_dat(table[i]);write_dat(table[i+1]);write_dat(table[i+2]);write_com(0xc0);write_dat(' ');write_dat(' ');write_dat(' '); write_dat(table2[(hour/10)]);write_dat(table2[(hour%10)]);write_dat(':');write_dat(table2[(min/10)]);write_dat(table2[(min%10)]);write_dat(':');write_dat(table2[(sec/10)]);write_dat(table2[(sec%10)]);shop();temp=ReadTemperature();temperature=(float)temp*0.0625;write_dat(' ');write_dat(table2[(int)temperature/10]);write_dat(table2[(int)temperature%10]);write_dat('C');write_com(0x02);}void main(){init();//初始化EA=1;//开总中断ET0=1;TMOD=0x01;TH0=0x3c;TL0=0xb0;TR0=1;//开T0时钟while(1){display_LCD();}}

单片机课程设计 2019-12-14完成，2020-1-2上传