1. 在使用CC3200进行SSL加密的时候，需要证书，但是证书有一个截止日期，如果当前CC3200没有设置这个日期，那么证书通信会失败，需要添加代码
int setDeviceTime() {
SlDateTime_t dateTime= {};
dateTime.sl_tm_day = (_u32); // Day of month (DD format) range 1-31
dateTime.sl_tm_mon = (_u32); // Month (MM format) in the range of 1-12
dateTime.sl_tm_year = (_u32); // Year (YYYY format)
dateTime.sl_tm_hour = (_u32); // Hours in the range of 0-23
dateTime.sl_tm_min = (_u32); // Minutes in the range of 0-59
dateTime.sl_tm_sec = (_u32); // Seconds in the range of 0-59
sl_DevSet(SL_DEVICE_GENERAL_CONFIGURATION,
SL_DEVICE_GENERAL_CONFIGURATION_DATE_TIME,
sizeof(SlDateTime_t),
(_u8 *)(&dateTime));
}