使用cc3200开发板在运行TCP socket例程时一直不能成功连接ap，程序跑到WlanConnect（）时一直在 _SlNonOsMainLoopTask()中出不来，串口显示信息一直如下：
************************************************* CC3200 TCP Socket Application *************************************************
Host Driver Version: 1.0.0.10
Build Version 2.4.0.2.31.1.3.0.1.1.0.3.34
Device is configured in default state
Device started as STATION
Connecting to AP: cc3200demo ...
