用定时器即可实现精准时钟荔枝
https://img-mid.csdnimg.cn/release/static/image/mid/ask/665327742786188.png
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这是1602驱动荔枝,在有人机交互之后,添加任意功能都可以通过显示器辅助实现
#include <reg52.h>                     
#define uint unsigned int
#define uchar unsigned char
sbit    RS=P2^0;
sbit    RW=P2^1;
sbit    E=P2^2;
uchar code table[]="Welcome to china";
void delay(ms){
uint i,j;
    for(i=0;i<ms;i++)
    for(j=0;j<123;j++);
}
void write_com_data(uchar com,uchar x){
    E=RW=0;RS=x;
    delay(1);
    P0=com;
    E=1;delay(1);
    E=0;
}
void init(){
    write_com(0x38,0);
    write_com(0x0c,0);
    write_com(0x06,0);
    write_com(0x01,0);
}
void main(){
    uint i;
    init();
    write_com_data(0x80,0);
    for(i=0;i<16;i++){
    write_com_data(table[i],1);    
    }write_com_data(0xc0,0);
        for(i=0;i<16;i++){
    write_com_data(table[i],1);    
    }
        while(1);
    }


```