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这是测试串口时候拍的，刚刚学会上传视频。嘿嘿！

#include<reg51.h> //双色点阵显示心形
unsigned char const dofly[]={0x00,0x6C,0x92,0x82,0x44,0x28,0x10,0x00};
unsigned char code seg[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};  
void delay(unsigned int cnt)
{
 while(--cnt);
}

main()
{
 unsigned char i;

 while(1)
      {
 
       P0=dofly[i];
       P2=seg[i];  
       delay(300); 
        i++;
        if(8==i)   
        i=0;
      }
}

不好意思，寝室有点吵！

#include<reg51.h> //数码管显示
unsigned char const dofly[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
                                                                     // 显示值       01234567
unsigned char code seg[]={0,1,2,3,4,5,6,7};             
void delay(unsigned int cnt)
{
    while(--cnt);
}
main()
{
         unsigned char i;
        while(1)
          {
              P0=dofly[i];
              P2=seg[i];  
             delay(200); 
              i++;
             if(8==i)  
             i=0;
           }
}

串口通信
相应的代码
 
#include<reg52.h>                             
void main (void)
{

    SCON  = 0x50;      
    TMOD |= 0x20;               
    TH1   = 0xFD;             
    TR1   = 1;               
    EA    = 1;                  
    ES    = 1;                
while (1)                      
    {
    }
}
void UART_SER (void) interrupt 4 //串行中断服务程序
{
    unsigned char Temp;       
   
   if(RI)                       
     {
        RI=0;                     
        Temp=SBUF;                
        P1=Temp;                  
       SBUF=Temp;                 
    }
   if(TI)                        
     TI=0;
} 

串口通信的图片