基于C51单片机的定时闹钟
上电后设置定时时间，按键1选择设置的是小时分钟还是秒钟
按键2对其进行具体的数字设置
一次选择完成之后就默认进入计时模式
达到计时时间后响铃
按键3可以关闭响铃
代码
#include<reg52.h>
#include<stdlib.h>
#include<stdio.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char
uint num,A_num,x=0;
uint h,m,s;
uint h1=0,m1=0,s1=0,sign=1;
uchar code Zifu[]="0123456789";
sbit beep = P2^3;
sbit LCD_EN = P3^4;
sbit LCD_RS = P3^5;
sbit duan = P2^6;
sbit wei = P2^7;
sbit key_A = P3^6;
sbit key_B = P3^7;
void delay_1ms(uchar x){
uchar i,j;
for(j=0;j<x;j++)
for(i=0;i<110;i++);
}
void write_command(uchar command){
LCD_RS = 0;
LCD_EN = 0;
P0 = command;
delay_1ms(2);
LCD_EN = 1; //EN ÓÉ1 -- 0 Íê³É ÓÐЧÊý¾Ý µÄ Ëø´æ
delay_1ms(2);
LCD_EN = 0;
}
void write_data(uchar yes){
LCD_RS = 1;
LCD_EN = 0;
P0 = yes;
delay_1ms(2);
LCD_EN = 1;
delay_1ms(2);
LCD_EN = 0;
}
void lcd_post(int X,int Y){
//0,1±íÕ÷ µÚÒ»ÐÐ ºÍ µÚ¶þÐÐ
write_command(0x80+X*(0x40)+Y);
}
void init(){
h=m=s=0;
num=A_num=0;
LCD_EN=0;
write_command(0x38);
write_command(0x0c);
//write_command(0x06); //д×Ö·ûºóµØÖ·Ö¸Õë¼ÓÒ»
write_command(0x01);
TMOD = 0x02;
TH0 = 6;
TL0 = 6;
EA = 1;
ET0 = 1;
TR0 = 1;
/*ʱ·ÖÃë*/
lcd_post(0,0); write_data(Zifu[h/10]);
lcd_post(0,1); write_data(Zifu[h%10]);
lcd_post(0,2); write_data(':');
lcd_post(0,3); write_data(Zifu[m/10]);
lcd_post(0,4); write_data(Zifu[m%10]);
lcd_post(0,5); write_data(':');
lcd_post(0,6); write_data(Zifu[s/10]);
lcd_post(0,7); write_data(Zifu[s%10]);
lcd_post(1,5); write_data('a');
lcd_post(1,6); write_data('l');
lcd_post(1,7); write_data('a');
lcd_post(1,8); write_data('r');
lcd_post(1,9); write_data('m');
lcd_post(1,10); write_data(' ');
lcd_post(1,11); write_data('c');
lcd_post(1,12); write_data('l');
lcd_post(1,13); write_data('o');
lcd_post(1,14); write_data('c');
lcd_post(1,15); write_data('k');
}
void ling()
{
unsigned char a;
for(a=0;a<500;a++)
{
if((P1&0x80)==0)
{
break;
}
lcd_post(1,5); write_data('l');
lcd_post(1,6); write_data('i');
lcd_post(1,7); write_data('n');
lcd_post(1,8); write_data('g');
lcd_post(1,9); write_data('!');
lcd_post(1,10); write_data(' ');
lcd_post(1,11); write_data('l');
lcd_post(1,12); write_data('i');
lcd_post(1,13); write_data('n');
lcd_post(1,14); write_data('g');
lcd_post(1,15); write_data('!');
beep=0;
delay_1ms(500);
lcd_post(1,5); write_data(' ');
lcd_post(1,6); write_data(' ');
lcd_post(1,7); write_data(' ');
lcd_post(1,8); write_data(' ');
lcd_post(1,9); write_data(' ');
lcd_post(1,10); write_data(' ');
lcd_post(1,11); write_data(' ');
lcd_post(1,12); write_data(' ');
lcd_post(1,13); write_data(' ');
lcd_post(1,14); write_data(' ');
lcd_post(1,15); write_data(' ');
beep=1;
delay_1ms(500);
}
lcd_post(1,5); write_data('a');
lcd_post(1,6); write_data('l');
lcd_post(1,7); write_data('a');
lcd_post(1,8); write_data('r');
lcd_post(1,9); write_data('m');
lcd_post(1,10); write_data(' ');
lcd_post(1,11); write_data('c');
lcd_post(1,12); write_data('l');
lcd_post(1,13); write_data('o');
lcd_post(1,14); write_data('c');
lcd_post(1,15); write_data('k');
}
void keyscan(){
if(key_A==0){
delay_1ms(3);
if(key_A==0){
A_num++;
switch(A_num){
case 1: //ʱ
TR0=0;
lcd_post(0,1);
write_command(0x0f);
break;
case 2:lcd_post(0,4);break; //·Ö
case 3:lcd_post(0,7);break; //Ãë
case 4:
A_num=0;
write_command(0x0c);
TR0=1;
sign = 0;
break;
}
}
while(!key_A);
}
if(A_num!=0){
if(key_B==0){
delay_1ms(3);
if(key_B==0){
switch(A_num){
case 1:
h1=(++h1)%24;
lcd_post(0,0); write_data(Zifu[h1/10]);
lcd_post(0,1); write_data(Zifu[h1%10]);
break; //ʱ
case 2:
m1=(++m1)%60;
lcd_post(0,3); write_data(Zifu[m1/10]);
lcd_post(0,4); write_data(Zifu[m1%10]);
break; //·Ö
case 3:
s1=(++s1)%60;
lcd_post(0,6); write_data(Zifu[s1/10]);
lcd_post(0,7); write_data(Zifu[s1%10]);
break; //Ãë
case 4:sign = 0;break;
}write_command(0x10);
}
while(!key_B);
}
}
}
void main()
{
int clk1 =0;
int clk2 =0;
there:
beep=0;
init();
//there:
h1=m1=s1=0;
while(sign)
{
keyscan();
}
clk1 = 0;
clk2 = h1*3600+m1*60+s1;
init();
while(1){
if(num==3686){
num=0;
s++;
clk1++;
if(clk1 == clk2)
{
ling();
sign = 1;
goto there;
}
if(s==60){
s=0;
m++;
if(m==60){
m=0;
h++;
if(h==24)h=0;
lcd_post(0,0); write_data(Zifu[h/10]);
lcd_post(0,1); write_data(Zifu[h%10]);
}
lcd_post(0,3); write_data(Zifu[m/10]);
lcd_post(0,4); write_data(Zifu[m%10]);
}
lcd_post(0,6); write_data(Zifu[s/10]);
lcd_post(0,7); write_data(Zifu[s%10]);
}
}
}
void T0_time() interrupt 1
{
num++;
}