#include<reg52.h>

sbit ADDR0 = P1^0;

sbit ADDR1 = P1^1;

sbit ADDR2 = P1^2;

unsigned char code LedChar[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71};

unsigned char LedBuff[8] = {

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00

};

unsigned char T0RH = 0;

unsigned char T0RL = 0;

unsigned char RxdByte = 0;

void ConfigTimer0(unsigned int ms);

void ConfigUART(unsigned int baud);

void main()

{

P0 = 0x00;

EA = 1;

ConfigTimer0(1);

ConfigUART(9600);

while(1)

{

LedBuff[7] = LedChar[RxdByte & 0x0F];

LedBuff[6] = LedChar[RxdByte >>4];

  }

}

void ConfigTimer0(unsigned int ms)

{

unsigned long tmp;

tmp = 11059200/12;

tmp = (tmp*ms)/1000;

tmp = 65536 - tmp;

tmp = tmp + 31;

T0RH = (unsigned char)(tmp>>8);

T0RL = (unsigned char)tmp;

TMOD &= 0xF0;

TMOD |= 0x01;

TH0 = T0RH;

TL0 = T0RL;

ET0 = 1;

TR0 = 1;

}

void ConfigUART(unsigned int baud)

{

SCON = 0x50;

TMOD &= 0x0F;

TMOD |= 0x20;

TH1 = 256 - (11059200/12/32)/baud;

TL1 = TH1;

ET1 = 0;

ES = 1;

TR1 = 1;

}

void LedScan()

{

static unsigned char index = 7;

P0 = 0x00;

P1 = (P1 & 0x00)|index;

P0 = LedBuff[index];

if(index>0)

index--;

else 

index = 7;

}

void InterruptTimer0() interrupt 1

{

TH0 = T0RH;

TL0 = T0RL;

LedScan();

}

void InterruptUART()interrupt 4

{

if(RI)

{

RI = 0;

RxdByte = SBUF;

SBUF = RxdByte;

  }

if(TI)

{

TI = 0;

  }

}