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標題: 液晶電子鐘24小時 [打印本頁]

作者: zero^ 時間: 2021-12-30 09:36
標題: 液晶電子鐘24小時
#include <reg51.h>
#include <intrins.h>
sbit RS=P0^7;
sbit RW=P0^6;
sbit E=P0^5;

unsigned char count=0;
unsigned char s=0;
unsigned char m=0;
unsigned char h=0;

void lcd_w_cmd(unsigned char com);
void lcd_w_dat(unsigned char dat);
unsigned char lcd_r_start();
void lcd_int();
void delay(unsigned int i);
void delay1();

void timer_1() interrupt 3{
TH1=(65536-50000)/256;
TL1=(65536-50000)%256;
count++;
if(count==20){
count=0;
s++;
if(s==60){
s=0;
m++;
if(m==60){
m=0;
h++;
if(h==24){
h=0;
}
}
}
}
}

void main(){
unsigned char lcd[]="0123456789";
  unsigned char i;
TMOD=0x10;
TH1=(65536-50000)/256;
TL1=(65536-50000)%256;
ET1=1;
EA=1;
TR1=1;
P2=0xff;
lcd_int();
delay(255);
lcd_w_cmd(0x84);
delay(255);
while(1){
for(i=0;i<9;i++){
switch(i){
case 0:lcd_w_dat(lcd[h/10]);break;
case 1:lcd_w_dat(lcd[h%10]);break;
case 2:lcd_w_dat(':');break;
case 3:lcd_w_dat(lcd[m/10]);break;
case 4:lcd_w_dat(lcd[m%10]);break;
case 5:lcd_w_dat(':');break;
case 6:lcd_w_dat(lcd[s/10]);break;
case 7:lcd_w_dat(lcd[s%10]);break;
case 8:lcd_w_cmd(0x84);break;
}
}
}
}

void delay1(){
  _nop_();
  _nop_();
  _nop_();
}

void lcd_int(){
  lcd_w_cmd(0x3c);
  lcd_w_cmd(0x0c);
  lcd_w_cmd(0x01);
  lcd_w_cmd(0x06);
  lcd_w_cmd(0x80);
}

unsigned char lcd_r_start(){
  unsigned char s;
  RW=1;
  delay1();
  RS=0;
  delay1();
  E=1;
  delay1();
  s=P2;
  delay1();
  E=0;
  delay1();
  RW=0;
  delay1();
  return(s);
}

void lcd_w_cmd(unsigned char com){
  unsigned char i;
  do{
i=lcd_r_start();
i=i&0x80;
delay(2);
   }while(i!=0);
  RW=0;
  delay1();
  RS=0;
  delay1();
  E=1;
  delay1();
  P2=com;
  delay1();
  E=0;
  delay1();
  RW=1;
  delay(255);
}

void lcd_w_dat(unsigned char dat){
  unsigned char i;
  do{
i=lcd_r_start();
i=i&0x80;
delay(2);
   }while(i!=0);
  RW=0;
  delay1();
  RS=1;
  delay1();
  E=1;
  delay1();
  P2=dat;
  delay1();
  E=0;
  delay1();
  RW=1;
  delay(255);
}

void delay(unsigned int i){
  unsigned int k;
for(k=0;k<i;k++);
}

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