Communicate via USB-serial adapter

See more:

C++

ActiveX

MSComm

Hi,

Could you please help me out? I need to use my laptop to communicate with embedded board I built through serial port.

The program written in C++ works very well when I use PC to communicate with board. But when I use laptop with USB-serial adapter, the program goes wrong, showing "FlameMonitoring.exe has triggered a breakpoint". I found that the problem occurs at m_ctrlComm.get_Input(). My initialization code as follows.

m_ctrlComm.put__CommPort(COM_PORT);
m_ctrlComm.put_InBufferSize(1024);
m_ctrlComm.put_PortOpen(TRUE);
m_ctrlComm.put_Settings("115200,n,8,1");
m_ctrlComm.put_InputMode(1);
m_ctrlComm.put_RThreshold(6);
m_ctrlComm.put_InputLen(0);
m_ctrlComm.get_Input();

Did I miss something? Besides, the program can enter OnComm(), which means it receives data. And I think it is also able to send data to embedded board. Any suggestion? Many thanks for your help.

Danny