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USB Virtual COM Port on MSP430

Joseph Dobesh
Prodigy 160 points
Other Parts Discussed in Thread: MSP430F5509

I am using TI's USB stack on a 5529. When using various terminal programs, not all of them are able to connect to the COM port. I have one that does (Tera Term), but it takes a long time to connect. Where should I start looking first? I am hesitant to think it is the stack.

 

Joe

 

  • 0
    Guru 34453 points

    Don't use terminal programs for CDC. Use your own CDC application. I am using Win32 API ReadFile/WriteFile functions. In this case you can find out easily where is source of problem (if you have one).

  • 0 in reply to zrno soli
    Prodigy 160 points

    The problem is not reading and writing. Once the connection is established, we can communicate fine. It happens when we try to open the COM port in Windows. Most of the time we get a semaphore timeout. It should not take that long to open the port. Is it possible that the inf file is out of date. We are using Window 7.

  • 0 in reply to Joseph Dobesh
    Prodigy 135 points

    Joe,

    I work with MSP430F5509, but dare to tell You the problem can be in the time of execution.

    When You are in debugging mode, operation systems sometimes couldn't see your device. 

    Run it in autonomous mode and check. I guess all terminals will work properly and perfect.

    Regards,

    Vlad.

     

     

     

     

     

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