SerialUSB not changing baudrate

[tomLessing]

I am trying to change the baudrate on the SerialUSB class but no luck it seems. I have an almost identical piece of code for windows that works well if you open and close the port but I have tried all kinds of tricks on MF.NET like flushing, discarding buffers.

Any help would be appreciated. According to the documentation you can change the baudrate but there is no close like in windows.

MF.NET Snippet:
serial.Write(sendBuffer, 0, sendBuffer.Length);
                        serial.Flush();
                        serial.Baudrate = 9600;
                        serial.DiscardInBuffer();
                        serial.DiscardOutBuffer();
                       serial.Open();
                        Thread.Sleep(500);
                        bytesRead = serial.Read(readBuffer, 0, 500);

                        Debug.Print(MyExtensions.ConvertToString(readBuffer, bytesRead));


Windows snippet:
  serial.Write(sendBuffer, 0, sendBuffer.Length);
            Thread.Sleep(200);
            serial.Close();
            serial.BaudRate = 9600;
            serial.Open();
           
            Thread.Sleep(600);
            bytesRead = serial.Read(readBuffer, 0, 500);

            Debug.Print(ConvertToString(readBuffer, bytesRead));

[tomLessing]

O, the serial USB chip is an FTDI chip, according to the documentation there are no known issues and it is not mentioned that you cannot change the serial settings like with the other chips.

From the docs:

FTDI:

No known issues.
SiLabs:

No handshake support.
Serial settings cannot be changed after creating the object.
Prolific:

No handshake support.
Serial settings cannot be changed after creating the object.
CDC:

No handshake support.

[SupportAdmin]

Is this on 3.0 or 4.0?

[GHI_Support]

When you insert it, did you get a FTDI device type?
What is the before and after baudrates you are changing?
Open you serial port with baudrate, does it work? new SerialPort(...9600...);

Make sure you are using the latest firmawre.

[tomLessing]

The version I am using is 3.0.
When I insert the device it reports FTDI device type

Before baudrate is 300 and after should be 9600 but once I change the baudrate I don't get a response which strongly suggests that it is not reading the serial data.

Initially I configure the serial for 7 bit, even parity, 1 stop bit and then all I change is the baudrate

[GHI_Support]

Please try with a simple C# program and a terminal program on PC. It is possible that the other end of the communication (not EM) is not changing baudrate correctly too...
If you can generate with a simple program, we can look into it. It should be working fine.
Please test on latest V4.

[tomLessing]

Doing that will be difficult as my USB serial device is optical and I only have one optical serial port lying around. As mentioned earlier I use virtually the same code for windows with exactly the same serial usb optical link and it works fine.

The baudrate just doesn't want to change it seems.

Any help will be appreciated.

[GHI_Support]

We tested changing baudrate and it is working fine on our FTDI serial cables with latest version 4.

[tomLessing]

Upgraded to version 4 and it fixed the issue.

When do you anticipate to release the USB client for version 4.0?

[SupportAdmin]

It is all done so it should be anytime now. Maybe 2 more weeks? That is the release of 4.0. For the client support, it will be another month.