yejing0~99jishuqi.c

89C51单片机 1602液晶显示0~99计数器

#include<reg52.h>
sbit lcdrs=P3^5;
sbit lcden=P3^4;
sbit dula=P2^6;
sbit wela=P2^7;
uchar code table[]="counter";
uchar shu,shi,ge,t,num;
void delay(uint z)
{
    uint x,y;
    for(x=z;x>0;x--)
        for(y=110;y>0;y--);
}

void write_cmd(uchar cmd)
{
    lcdrs=0;
    P0=cmd;
    delay(5);
    lcden=1;
    delay(5);
    lcden=0;
}

void write_data(uchar dat)    
{
    lcdrs=1;
    P0=dat;
    delay(5);
    lcden=1;
    delay(5);
    lcden=0;
}

void writeshu(uchar add,uchar wei)
{
    write_cmd(0x80+add);
    write_data(0x30+wei);
}

void init()
{
    TMOD=0x01;
    TH0=(65536-50000)/256;
    TL0=(65536-50000)%256;
    EA=1;
    ET0=1;
    TR0=1;
    dula=0;    
    wela=0;
    lcden=0;
    write_cmd(0x38);
    write_cmd(0x0c);
    write_cmd(0x01);
    write_cmd(0x80);
}

void timer0() interrupt 1
{
    TH0=(65536-50000)/256;
    TL0=(65536-50000)%256;
    t++;
    if(t==20)
    {
        t=0;
        shi=shu/10;
        ge=shu%10;
        writeshu(0x06,shi);
        writeshu(0x07,ge);
        shu++;
        if(shu==100)
        shu=0;    
    }
}
void main()
{
    init();
    write_cmd(0x80+0x44);
    for(num=0;num<7;num++)
    write_data(table[num]);
    while(1);
    
}