配置文件设置失败

Opening configuration file mmw_pplcount_demo_default.cfg ...
Sending configuration from mmw_pplcount_demo_default.cfg file to IWR16xx ...

   Serial Port Object : Serial-COM3

   Communication Settings
      Port:               COM3
      BaudRate:           115200
      Terminator:         'LF'

   Communication State
      Status:             open
      RecordStatus:       off

   Read/Write State 
      TransferStatus:     idle
      BytesAvailable:     0
      ValuesReceived:     0
      ValuesSent:         0
 

dfeDataOutputMode 1
警告: 意外警告: A timeout occurred before the Terminator was reached.
警告: 意外警告: A timeout occurred before the Terminator was reached.
警告: 读取失败:  The specified amount of data was not returned within the Timeout period.。
channelCfg 15 3 0
66  varargout = cell(1,3);

这个是因为什么呢？求指教