单片机lcd1602液晶显示秒表精确到0.01s，注释部分我懒得修改了，已经可....

ID:652868 · 发表于 2020-4-14 08:01

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit en=P3^4;
sbit rs=P3^5;
sbit rd=P3^7;
sbit s4=P3^6;
uchar fen,miao,s4num,count,mm;
uchar code table[]=" 00:00:00 ";
void delay(uint z)//ÑÓÊ±º¯Êý
{
uint x,y;
for(x=z;x>0;x--)
      for(y=110;y>0;y--);
}
void write_com(uchar com)
{
rs=0;
en=0;
P0=com;
delay(1);
en=1;
delay(1);
en=0;
}
void write_data(uchar date)
{
rs=1;
en=0;
P0=date;
delay(1);
en=1;
delay(1);
en=0;
}
void init()//³õÊ¼»¯
{
uchar num;
fen=00;
miao=00;
mm=00;
write_com(0x38);
delay(1);
write_com(0x38);
delay(1);
write_com(0x0c);
write_com(0x06);
write_com(0x80+0x40);
for(num=0;num<12;num++)
      {
         write_data(table[num]);
         delay(1);
      }
      TMOD=0x10;
      TH1=(65536-10000)/256;
      TL1=(65536-10000)%256;
      EA=1;
      ET1=1;
      TR1=0;
}
void write_jishi(uchar add,uchar date)
{
uchar shi,ge;
shi=date/10;
ge=date%10;
write_com(0x80+0x40+add);
write_data(0x30+shi);
write_data(0x30+ge);
}
void keyscan()
{
rd=0;
if(s4==0)
{
      delay(1);
      if(s4==0)
      {
         s4num++;
         while(!s4);
         if(s4num==1)
         {
            TR1=1;
            mm++;
            if(mm==100)
            {
                  mm=0;
                  miao++;
                  if(miao==60)
                  {
                     miao=0;
                     fen++;
                     if(fen==60)
                     {
                        TR1=0;
                     }
                        write_jishi(4,fen);
                        write_com(0x80+0x40+5);
                  }
                  write_jishi(7,miao);
                  write_com(0x80+0x40+8);
            }
            write_jishi(10,mm);
            write_com(0x80+0x40+11);
         }
         if(s4num==2)
         {
            TR1=0;
         }
         if(s4num==3)
         {
            s4num=0;
            write_com(0x0c);
            init();
         }
      }
}
}

void main()
{
init();
while(1)
{
      keyscan();
}
}
void timer0() interrupt 3
{
TH1=(65536-10000)/256;
TL1=(65536-10000)%256;
count++;
if(count!=0)
{
      mm++;
      if(mm==100)
      {
         mm=0;
         miao++;
         if(miao==60)
         {
            miao=0;
            fen++;
            if(fen==60)
            {
                  TR1=0;
            }
            write_jishi(4,fen);
         }
         write_jishi(7,miao);
      }
      write_jishi(10,mm);
}
}

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