#include <reg51.h>unsigned char rcv[2];unsigned char b=0;void main(){ SCON = 0x50 ; //SCON: serail mode 1, 8-bit UART, enable ucvr TMOD= 0x20 ; //TMOD: timer 1, mode 2, 8-bit reload PCON= 0x80 ; //SMOD=1; TH1 = 0xFD ; //Baud:9600 fosc="11".0592MHz TL1=0xFD;ES=1;TR1 = 1 ; // timer 1 run EA=1;}void datareceieve(void) interrupt 4 using 3{ unsigned char a; if(RI) { RI=0; a=SBUF; rcv[b]=a; b++; P1=rcv[0]; P2=rcv[1]; if(b>1) { b=0; }} EA=1;}这是我的程序，谢谢大家帮忙