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Professional Development Board: Invalid Port when using USB

inakiinaki Posts: 262
edited 2005-05-31 19:38 in General Discussion
I get 'Invalid COM port' when I try to connect to the Basic Stamp using the USB miniature port that is provided on the PDB.
The new USB device was detected correctly by Windows and driver installation and software was successful.
The USB·port is installed on my PC as COM10.

On the device list in Basic Stamp Editor I see both COM1 and COM10, but in COM10 there is a legend that says 'Invalid Port'.
The columns Version, Loopback and Echo stay blank on COM10.
If I connect to the PDB using the COM1 instead I get the right stamp identification on port COM1.

I cannot find any jumper or setting to·select the·use of USB port on PDB.

Anyone knows about this problem ?

Comments

  • Paul BakerPaul Baker Posts: 6,351
    edited 2005-05-31 12:14
    I know the IDE for the SX use to have a problem accessing non-consecutive com port addresses (so maybe the Stamp IDE has the same problem), can you renumber the COM port it is mapped to be one after the last com port on your system?
  • Jon WilliamsJon Williams Posts: 6,491
    edited 2005-05-31 12:26
    Do you have the serial port and USB port connected at the same time?· Don't.· And we suggest that you manually install the FTDI VCP drivers; the auto-driver install is not always reliable.·

    VCP driver installation instructions: http://www.parallax.com/dl/docs/prod/acc/USBInstallWinXP.pdf

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    Jon Williams
    Applications Engineer, Parallax
  • inakiinaki Posts: 262
    edited 2005-05-31 16:36
    Paul, I have·found·no way to change the COM port. I will try to disable other COM ports to see if it solves something.

    John, I have tried with·the serial COM plugged and unplugged. It does the same thing. Note however that I would like to have·the USB connected to BasicStamp and the COM1 plugged to SX-Key at the same time. Is this advisable/possible ?

    The default installation for serial USB·works with other FTDI devices I have (and I have·more than a couple·of them). I think perhaps the driver is not right for the USB on PDB?.·The PDB board does not·come with drivers. Is there any specific FTDI driver version·should I use·?
  • Jon WilliamsJon Williams Posts: 6,491
    edited 2005-05-31 17:10
    Yes, you can use USB to program BASIC Stamps and your standard serial port to program the SX (through an SX-Key).· What I was suggesting is that you do not attemp to use the USB and serial port for the BASIC Stamp at the same time.

    You can get the latest VCP driver from this link: http://www.ftdichip.com/Drivers/FT232-FT245Drivers.htm#VCP

    Once installed (you should manually uninstall the old driver first) you wont' have any troubles with any Parallax USB products -- we use the same FTDI chip in all of our products.



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    Jon Williams
    Applications Engineer, Parallax
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2005-05-31 17:29
    Hello,

    ···The newest version of the Stamp Editor software supports the higher COM Ports, and can be downloaded from our website.



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    Chris Savage
    Parallax Tech Support
    csavage@parallax.com
  • inakiinaki Posts: 262
    edited 2005-05-31 19:38
    Thanks Chris, it works with version 2.2 of the BSE.
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