问题描述

51单片机利用串口改变时钟问题

下面是我用串口改变时间的代码，但是我只会改变时、分、秒中的一个，求大神帮我改一改能够分别改时、分、秒

 #include<reg51.h>#define uint unsigned int#define uchar unsigned char uchar hourminsectemp;uchar aa;uchar code table[]={0xc00xf90xa40xb00x990x920x820xf80x800x90};                             void  delay(uint z);void  display(uchar auchar buchar cuchar duchar euchar f);void  time_change();void revdata(void) interrupt 4{        ES=0;    if(RI==1){RI=0;aa=SBUF-48;        hour=aa;    ES=1;}}void main(){         hour=0;         min=0;         sec=0;           SCON=0x50;           PCON = 0x00;         TMOD=0x21;         TH0=(65536-50000)/256;         TL0=(65536-50000)%256;           TH1=0xfd;           TL1=0xfd;         EA=1;           ES=1;         ET0=1;           ET1=0;         TR0=1;           TR1=1;           delay(50);    while(1)    {   time_change(); display(table[hour/10]table[hour%10]table[min/10]table[min%10]table[sec/10]table[sec%10]);                        }}void display(uchar auchar buchar cuchar duchar euchar f){    P1=0x01;P0=a;delay(2);    P1=0x02;P0=b;delay(2);    P1=0x08;P0=c;delay(2);    P1=0x10;P0=d;delay(2);    P1=0x40;P0=e;delay(2);    P1=0x80;P0=f;delay(2);    P1=0x04;P0=0xbf;delay(2);    P1=0x20;P0=0xbf;delay(2);}void timer0() interrupt 1{         TH0=(65536-50000)/256;         TL0=(65536-50000)%256;         temp++;}void delay(uint z){     uint jk;     for(j=z;j>0;j--)     for(k=120;k>0;k--);}void time_change(){         if(temp>=20)         {          temp=0;     sec++;          if(sec>=60)            {                 sec=0;                     min++;                     if(min>=60)                     {                             min=0;                        hour++;                             if(hour>=24)                             {                                    hour=0;                             }                      }             }          }}

解决方案

单片机通过串口通信调整时间的程序
http://www.eeworld.com.cn/mcu/2015/0429/article_19714.html