STC51单片蓝牙和单片机数据传送时没有反应

teacher发的STC51单片 STC8H8K串口3-数据发送示例 在测试蓝牙和单片机数据传送时没有反应 求解

#include"reg51.h"
#include"intrins.h"
sfr T2L=0xd7;
sfr T2H=0xd6;
sfr AUXR=0x8e;
sfr S3CON=0xac;
sfr S3BUF=0xad; 
sfr IE2=0xaf;
#define ES3 0x08
sfr P0M1=0x93;
sfr P0M0=0x94;
sfr P1M1=0x91;
sfr P1M0=0x92;
sfr P2M1=0x95;
sfr P2M0=0x96;
sfr P3M1=0xb1;
sfr P3M0=0xb2;
sfr P4M1=0xb3;
sfr P4M0=0xb4;
sfr P5M1=0xc9;
sfr P5M0=0xca;
sbit P12=P1^2;
sbit P13=P1^3;
P_SW2=0x02;
void UART3_Isr() interrupt 17
{
if(S3CON & 0x02)
{
S3CON&=~0x02;
P12=!P12;
}
if(S3CON&0x01)
{
S3CON&=~0x01;
P13=!P13;
}
}
void main()
{
unsigned char test[]={0,1,2,3,4,5,6};
unsigned char k;
P0M0=0x00;
P0M1=0x00;
P1M0=0x00;
P1M1=0x00;
P2M0=0x00;
P2M1=0x00;
P3M0=0x00;
P3M1=0x00;  
P4M0=0x00;
P4M1=0x00;
P5M0=0x00;
P5M1=0x00;
S3CON=0x10;
T2L=0xe8;
T2H=0xff;
AUXR=0x14;
IE2=ES3;
EA=1;
S3BUF=0x5a;
while(1)
    {
    for(k=0;k<7;k++)
    {
    S3BUF=test[k];
    }
    }
}

先用串口直连把通讯调通再换蓝牙，蓝牙只是个接口转换而已