>Hi,
>
>Problem with RTS, DTR lines during the baud rate change.
>
>I am currently using the Serial Port class CSerialPort (by Remon Spekreijse) in MS Visual C++.
>When I am changing the baud rate by the following lines of code:
>
>m_dcb.BaudRate = CBR_115200;baud;
>if (SetCommState(m_hComm, &m_dcb)) {
>} else {
>}
>After executing these command, the lines RTS, DTR that are used for the control purposes, set into initial settings, different from my system’s default settings.
>Guys, Help me!!!!!!
>Thanks Alex


Hi Alex,

I don't know about managed code, but I think you have to get the default state first (GetCommState) before you set it. So it fills in the DCB structure

Hope it works
Regards