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CC2530协议栈中对外设蜂鸣器操作无响应

蜂鸣器外接在P2_4 口,不在协议栈中直接给高电平就能够成功点响,但只要一写入协议栈中蜂鸣器就会没有反应,代码大概就是在发送一串字符串出去后如果协调器没有接受,终端这里就会触发蜂鸣器进行提醒。不知道是在协议栈中P2_4是被占中了还是怎样,就是没一点响应。        

代码如下:

if ( events & SDApp_MY_EVT )
  {      
    char theMessageData[] = "hello worker.!";
    
    SDApp_DstAddr.addrMode = (afAddrMode_t)AddrGroup; //发送模式为组播的模式
    SDApp_DstAddr.addr.shortAddr = 0x0002; //接收模块的组编号
    // Take the first endpoint, Can be changed to search through endpoints
    SDApp_DstAddr.endPoint = SDApp_ENDPOINT ; //接收模块的端点房间号
    
    //SDApp_epDesc 结构体 端点描述符有源端点的信息,也是10
    
    if (  AF_DataRequest( &SDApp_DstAddr, &SDApp_epDesc,                 / 发送函数
                         0x0001,                             //族编号
                         (byte)osal_strlen( theMessageData ) + 1,               //发送字符串的长度
                         (byte *)&theMessageData,                   //字符串内容数组的首地址
                         &SDApp_TransID,
                         AF_DISCV_ROUTE, AF_DEFAULT_RADIUS ) == afStatus_SUCCESS )
    {
      HalLedBlink( HAL_LED_1,5,50,1000 );
      
    }
 else
    {
     P2SEL &= 0xef; //1110 1111
     P2DIR |= 0x10; //0001 0000
     P2_4 = 1; //在这里触发,但没有任何响应</strong></span>
     HalLedBlink( HAL_LED_2,5,50,1000 );   
                                                                               
    
    }