单片机设计时钟

#include <reg52.h> #include<24c02.h> #define uchar unsigned char #define uint unsigned int sbit dula=P2^6; sbit wela=P2^7; sbit rs=P3^5; sbit rw=P3^6; sbit lcden=P3^4; sbit s1=P3^0; sbit s2=P3^1; sbit s3=P3^2; sbit rd=P3^7; sbit beep=P2^3; uchar count ,s1num; char miao,shi,fen; uchar code table[]=" 2012-12-01 SAT"; void delayms(uint x) { uint i,j; for(i=x;x>0;x--) for(j=110;j>0;j--); } void di() { beep=0; delayms(100); beep=1; } void write_com(uchar com) { rs=0; lcden=0; P0=com; delayms(1); lcden=1; delayms(1); lcden=0; } void write_date(uchar date) { rs=1; lcden=0; P0=date; delayms(1); lcden=1; delayms(1); lcden=0; } void write_sfm(uchar add,uchar date) { uchar shii,ge; shii=date/10; ge=date%10; write_com(0x80+0x40+add); write_date(0x30+shii); write_date(0x30+ge); } void init() { uchar num; rd=0; rw=0; P0=0xff; wela=1; wela=0; dula=0; lcden=0; shi=0; fen=0; miao=0; count=0; s1num=0; init_24c02(); write_com(0x38); write_com(0x06); write_com(0x0c); write_com(0x01); write_com(0x80); for(num=0;num<16;num++) { write_date(table[num]); delayms(5); } write_com(0x80+0x40+6); write_date(':'); write_com(0x80+0x40+9); write_date(':'); miao=read_add(1); fen=read_add(2); shi=read_add(3); write_sfm(10,miao); write_sfm(7,fen); write_sfm(4,shi); TMOD=0X01; TH0=(65536-50000)/256; TL0=(65536-50000)%256; EA=1; ET0=1; TR0=1; } void keyscan() { if(s1==0) { delayms(5); if(s1==0) { while(!s1); s1num++;di(); if(s1num==1) { TR0=0; write_com(0x08+0x40+10); //write_com(0x0f); } if(s1num==2) { write_com(0x08+0x40+7); } if(s1num==3) { write_com(0x08+0x40+7); } if(s1num==4) { s1num=0; //write_com(0x0c); TR0=1; } } } if(s1num!=0) { if(s2==0) { delayms(5); if(s2==0) { while(!s2); di(); if(s1num==1) { miao++; if(miao>=60) miao=0; write_sfm(10,miao); //write_com(0x08+0x40+10); write_add(1,miao); } if(s1num==2) { fen++; if(fen>=60) fen=0; write_sfm(7,fen); //write_com(0x08+0x40+7); write_add(2,fen); } if(s1num==3) { shi++; if(shi>=24) shi=0; write_sfm(4,shi); //write_com(0x08+0x40+4); write_add(3,shi); } } } if(s3==0) { delayms(5); if(s3==0) { while(!s3); di(); if(s1num==1) { miao--; if(miao==-1) miao=59; write_sfm(10,miao); //write_com(0x08+0x40+10); write_add(1,miao); } if(s1num==2) { fen--; if(fen==-1) fen=59; write_sfm(7,fen); //write_com(0x08+0x40+7); write_add(2,fen); } if(s1num==3) { shi--; if(shi==-1) shi=23; write_sfm(4,shi); //write_com(0x08+0x40+4); write_add(3,shi); } } } } } void main() { init(); while(1) { keyscan(); } } void timer0()interrupt 1 { TH0=(65536-50000)/256; TL0=(65536-50000)%256; count++; if(count==20) {count=0; miao++; if(miao>=60) { miao=0; fen++; if(fen>=60) { fen=0; shi++; if(shi>=24) shi=0; write_sfm(4,shi); write_add(3,shi); } write_sfm(7,fen); write_add(2,fen); } write_sfm(10,miao); write_add(1,miao); } }