cc3200使用TI-RTOS，创建任务扫描网络不能获取正确的RSSI

使用cc3200例程scan-polic可以扫描网络，能够获取正确的ssid和rssi，但当使用ti-RTOS时，创建任务运行WlanScan时，不能获取正确的RSSI，而ssid第一个是对的，下面的都是空的。请TI的专家指导下，谢谢！！
main函数如下：硬件初始化代码略去
lRetVal = VStartSimpleLinkSpawnTask(SPAWN_TASK_PRIORITY);
if(lRetVal < 0)
[
      ERR_PRINT(lRetVal);
     Message(" VStartSimpleLinkSpawnTask errorrn");
     LOOP_FOREVER();
]
lRetVal = osi_TaskCreate(WlanScan,(const signed char *)"wlan",OSI_STACK_SIZE,NULL,1,NULL );
if(lRetVal < 0)
[
       ERR_PRINT(lRetVal);
       Message(" osi_TaskCreate errorrn");
       LOOP_FOREVER();
]
osi_start();
]
扫描函数如下：
void WlanScan(void *pvParameters)
[
      long lRetVal = -1;
      unsigned short ucIndex;
      unsigned char ucpolicyOpt;
      union
     [
          unsigned char ucPolicy[4];
          unsigned int uiPolicyLen;
      ]policyVal;
      InitializeAppVariables();
      lRetVal = ConfigureSimpleLinkToDefaultState();
      if(lRetVal < 0)
      [
           if (DEVICE_NOT_IN_STATION_MODE == lRetVal)
          [
               UART_PRINT("Failed to configure the device in its default statenr");
           ]
      ]
      UART_PRINT("Device is configured in default state nr");
      lRetVal = sl_Start(0, 0, 0);
      if (lRetVal < 0 || ROLE_STA != lRetVal)
      [
            UART_PRINT("Failed to start the device nr");
       ]
       UART_PRINT("Device started as STATION nr");
       ucpolicyOpt = SL_CONNECTION_POLICY(0, 0, 0, 0,0);
       lRetVal = sl_WlanPolicySet(SL_POLICY_CONNECTION , ucpolicyOpt, NULL, 0);
       if(lRetVal != 0)
      [
             UART_PRINT("Unable to clear the Connection Policynr");
       ]
       ucpolicyOpt = SL_SCAN_POLICY(1);

        policyVal.uiPolicyLen = 10;

        lRetVal = sl_WlanPolicySet(SL_POLICY_SCAN , ucpolicyOpt,(unsigned char*)(policyVal.ucPolicy), sizeof(policyVal));
        if(lRetVal!=0)
       [
              UART_PRINT("Unable to set the Scan Policynr");
        ]
        MAP_UtilsDelay(8000000);
        while(1)
       [
               ucIndex = 0;
               memset(netEntries, 0, sizeof(netEntries));
               lRetVal = sl_WlanGetNetworkList(ucIndex, (unsigned char)WLAN_SCAN_COUNT,&netEntries[ucIndex]);
               if(lRetVal==0)
              [
                     UART_PRINT("Unable to retreive the network listnr");
               ]
              for(ucIndex=0;ucIndex              [
                      UART_PRINT("ssid:%snr",netEntries[ucIndex].ssid);
                      UART_PRINT("rssi:%dnr",netEntries[ucIndex].rssi);
              ]
             MAP_UtilsDelay(8000000);
      ]
]

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