#include <reg52.h> //頭文件調用，寫程序時都要加上
#include <stdlib.h>
#define uint unsigned int //宏定義，為了后面定義變量書寫簡便
#define uchar unsigned char
code unsigned char LED[] ={~0x3F,~0x06,~0x5B,~0x4F,~0x66,~0x6D,~0x7D,~0x07,~0x7F,~0x6F,~0x77,~0x7C,~0x39,~0x5E,~0x79,~0x71};
void main (void)
{
SCON= 0x50; // SCON: 模式1, 8-bit UART, 使能接收
TMOD|= 0x20;
TH1=0xfd; //波特率9600 初值
TL1=0xfd;
TR1=1;
EA=1; //打開總中斷
ES=1; //打開串口中斷
while(1) //主循環不做任何動作
{
}
}
/******************************************************************/
/* 串口中斷程序*/
/******************************************************************/
void UART_SER () interrupt 4
{
uchar n; //定義臨時變量
if(RI) //判斷是接收中斷產生
{
RI=0; //標志位清零
n=SBUF;//讀入緩沖區的值
switch(n)
{
case'0':P2=~LED[0];break;
case'1':P2=~LED[1];break;
case'2':P2=~LED[2];break;
case'3':P2=~LED[3];break;
case'4':P2=~LED[4];break;
case'5':P2=~LED[5];break;
case'6':P2=~LED[6];break;
case'7':P2=~LED[7];break;
case'8':P2=~LED[8];break;
case'9':P2=~LED[9];break;
case'A':P2=~LED[10];break;
case'B':P2=~LED[11];break;
case'C':P2=~LED[12];break;
case'D':P2=~LED[13];break;
case'E':P2=~LED[14];break;
case'F':P2=~LED[15];break;
default: P2=~LED[0];
}
TI=1;
SBUF=n;//把接收到的值再發回
}
if(TI) //如果是發送標志位，清零
TI=0;
}
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