51单片机c语言1602LCD简单时钟显示实验详细操作适合新手入门范例程序

#include "reg51.h" #define uchar unsigned char sbit RW=P3^1; sbit RS=P3^0; sbit E=P3^2; bit at=0; //sbit busy_bit=P1^7; uchar code shen[]={"CLOCK!"}; uchar code word[]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x20}; uchar dispbuf[8],h,m,s,counter; void delay() { uchar i; for(i=0;i<255;i++); } /*******写命令**********/ void lcd_wmc(uchar i) { P0=i; RS=0; RW=0; E=0; delay(); E=1; } /*******写数据***********/ void lcd_wmd(uchar i) { P0=i; RS=1; RW=0; E=0; delay(); E=1; } /*******初始化液晶*******/ void lcd_init() { uchar i; lcd_wmc(0x01); lcd_wmc(0x38); lcd_wmc(0x0c); lcd_wmc(0x06); lcd_wmc(0xc9); for(i=0;i<6;i++) lcd_wmd(shen[i]); lcd_wmc(0xc0); } /*******更新缓冲区子程序*******/ void newbuf() { dispbuf[0]=s%10; dispbuf[1]=s/10; dispbuf[3]=m%10; dispbuf[4]=m/10; dispbuf[6]=h%10; dispbuf[7]=h/10; } /*******显示子程序**********/ void disp(uchar dispadd) { uchar tmp; lcd_wmc(dispadd); tmp=dispbuf[7]; tmp=word[tmp]; lcd_wmd(tmp); tmp=dispbuf[6]; tmp=word[tmp]; lcd_wmd(tmp); tmp=dispbuf[5]; tmp=word[tmp]; lcd_wmd(tmp); tmp=dispbuf[4]; tmp=word[tmp]; lcd_wmd(tmp); tmp=dispbuf[3]; tmp=word[tmp]; lcd_wmd(tmp); tmp=dispbuf[2]; tmp=word[tmp]; lcd_wmd(tmp); tmp=dispbuf[1]; tmp=word[tmp]; lcd_wmd(tmp); tmp=dispbuf[0]; tmp=word[tmp]; lcd_wmd(tmp); } /*********************键盘子程序***********************/ uchar keypro(void) { uchar scanl,scanh; P1=0xf0; if((P3&0xf0)!=0xf0) { delay(); if((P1&0xf0)!=0xf0) { scanl=0xfe; while((scanl&0x10)!=0) { P1=scanl; if((P3&0xf0)!=0xf0) { scanh=(P1&0xf0)|0x0f; return (~scanh)+(~scanl); } else scanl=(scanl<<1)|0x01; } } } return 0; } /********************时间调整子程序********************/ void adjustime() { uchar k; static uchar add; k=keypro(); switch(k) { case 0x88: if(!at){add=0xc1;EA=0;lcd_wmc(0xc1);lcd_wmc(0x0f);at=1;} else {lcd_wmc(0xc0);lcd_wmc(0x0c);at=0;EA=1;} break; case 0x48: if(at) { if(add==0xc1){add=0xc7; lcd_wmc(add);} else {add=add-3;lcd_wmc(add);} } break; case 0x28: if(at) { if(add==0xc7) {add=0xc1;lcd_wmc(add);} else {add=add+3;lcd_wmc(add);} } break; case 0x18: if(at) { if(add==0xc1) h++; if(h==24) h=0; if(add==0xc4) m++; if(m==60) m=0; if(add==0xc7) s++; if(s==60) s=0; newbuf(); disp(0xc0); lcd_wmc(add); } break; default: break; } if(k!=0) { while((P3&0xf0)!=0xf0) P1=0xf0; } } /*********************初始化子程序**********************/ void init() { TMOD=0x01; TH0=0x4c; TL0=0x00; EA=1; ET0=1; TR0=1; counter=0; h=12;m=0;s=0; dispbuf[2]=10; dispbuf[5]=10; } /***************************主程序************************/ void main(void) { init(); lcd_init(); while(1) { adjustime(); if(!at) { //闪烁 if(counter<10) { dispbuf[2]=10; dispbuf[5]=10; } else { dispbuf[2]=11; dispbuf[5]=11; } //更新显示缓冲区及调用显示程序 if(counter==0) { newbuf(); disp(0xc0); } else if(counter==10) disp(0xc0); } } } /*************************定时器0的中断**********************/ void Time0() interrupt 1 using 2 //再次强调中断子程序执行时间越短越好 { TH0=(65536-46075)/256; TL0=(65536-46075)%256; counter++; if(counter==20) { s++; counter=0; if(s==60) { m++; s=0; if(m==60) { h++; m=0; if(h==24) h=0; } } } }