cc3200在ap模式下，信道是如何选择的。可以根据环境自动选择信道吗？（如果可以怎样设置）如果不自动选择，设置信道后会保存吗？
使用wlanset设置：
Set channel for AP mode example:
The channel is dependant on the country code which is set. i.e. for "US" the channel should be in the range of [1-11]
unsigned char val = channel;
sl_WlanSet(SL_WLAN_CFG_AP_ID, WLAN_AP_OPT_CHANNEL, 1, (unsigned char *)&val);
