491636051964082简易电子时钟.rar

#include <reg51.h> #include <intrins.h> #define uchar unsigned char #define uint unsigned int #define DelayNOP() {_nop_();_nop_();_nop_();_nop_();} sbit K1 =P1^0; //选择调整小时，分钟 sbit K2 =P1^1; //增加 sbit K3 =P1^2; //减小 sbit K4 =P1^3; sbit SPK=P3^0; sbit RS =P2^0; sbit RW =P2^1; sbit E =P2^2; uchar code Str1[] =" now Time "; //一下两个字符串的串长均为16 uchar code Str2[] =" Set New Time"; uchar HMS_String[]=" 00:00:00 ";//带显示的时间串 bit Settime=0; //是否修改时间 bit Change_H_or_M =1;//1表示修改时.0表示修改分 uchar MilliSecond,Hour =23,Minute=59, Second =50; //延时函数 void DelayMS(uint x) { uchar i; while(x--) for(i=0;i<120;i++); } //LCD忙状态检测 bit LCD_Busy_Check() { bit result; RS = 0;RW = 1;E = 1;DelayNOP();result = (bit)(P0 & 0x80);E = 0; return result; } //写LCD命令 void LCD_Write_Command(uchar cmd) { while(LCD_Busy_Check());//判断LCD是否忙碌 RS = 0;RW = 0;E = 0;_nop_();_nop_();P0 = cmd; DelayNOP(); E = 1;DelayNOP();E = 0; } //设置LCD显示位置 void LCD_Set_Pos(uchar pos) { LCD_Write_Command(pos | 0x80); } //写LCD数据 void LCD_Write_Data(uchar dat) { while(LCD_Busy_Check());//判断LCD是否忙碌 RS = 1;RW = 0;E = 0; P0 = dat; DelayNOP(); E = 1;DelayNOP();E = 0; } //LCD初始化 void LCD_Initialize() { LCD_Write_Command(0x38);DelayMS(1); LCD_Write_Command(0x0c);DelayMS(1); LCD_Write_Command(0x06);DelayMS(1); LCD_Write_Command(0x01);DelayMS(1); } // 显示函数，在LCD指定的行上显示字符串 void Display_String(uchar*str,uchar LineNo) { uchar k; LCD_Set_Pos(LineNo); for(k=0;k<16;k++) LCD_Write_Data(str[k]); } //时分秒显示 void Display_HMS(uchar h,m,s) { if(Settime) HMS_String[3] = '>';//显示修改标志 else HMS_String[3] = ' '; //不显示修改标志 HMS_String[4] = h/10 + '0'; //时十位 HMS_String[5] = h/10 + '0'; HMS_String[5] = h%10 + '0'; //时个位 HMS_String[5] = h%10 + '0'; HMS_String[7] = m/10 + '0'; //分 HMS_String[8] = m/10 + '0'; HMS_String[8] = m%10 + '0'; //分 HMS_String[8] = m%10 + '0'; HMS_String[10]= s/10 + '0'; //秒 HMS_String[11]= s/10 + '0'; HMS_String[11]= s%10 + '0'; //秒 HMS_String[11]= s%10 + '0'; Display_String(HMS_String,0x40); } //设置时间 void Change_Time() { Settime=0; if(K1==0) //按下k1键即进入修改状态 { TR0 = 0; Display_String(Str2,0x00); //第一行提示修改时间 Settime = 1; } while (Settime) { if(K1 == 0) //确定调整小时还是分钟 { while(K1 == 0) Change_H_or_M = !Change_H_or_M; } else if(K2 == 0) //增加 { while(K2 == 0); if(Change_H_or_M==1) { if(++Hour == 24) Hour = 0; } else {if(++Minute == 60) Minute = 0;} } else if(K3 == 0) //减少 { while(K3 == 0); if(Change_H_or_M == 1) {if(--Hour == 0xff) Hour = 23;} else {if(--Minute == 0xff) Minute = 59;} } else if(K4 == 0) //确定 { while(K4 == 0); Display_String(Str1,0x00); //第一行还原显示str1 Settime = 0; TR0 = 1; } Display_HMS(Hour,Minute,Second); } //外层While在这里结束 } //定时器0中断 void Time0() interrupt 1 { TH0 = (65536 -50000)/256; TL0 = (65536 -50000)%256; //重新装入50MS定时 if(++MilliSecond == 20) //50*20=1s { MilliSecond = 0; if(++Second == 60) { Second = 0; if(++Minute == 60) { Minute = 0; if(++Hour == 24) { Hour = 0;Minute = 0;Second = 0; } } } } } //主函数 void main() { TMOD = 0x01; TH0 = (65536-50000)/256; TL0 = (65536-50000)%256; IE = 0x82; SPK = 0; LCD_Initialize(); Display_String(Str1,0x00); //第一行显示 TR0 = 1; P1 = 0xFF; while(1) { Display_HMS(Hour,Minute,Second); //第二行显示时分秒 DelayMS(500); Change_Time(); //显示过程中允许修改时间 } }