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SumoBot: Can't load code into Bot — Parallax Forums

SumoBot: Can't load code into Bot

quarkzquarkz Posts: 4
edited 2011-10-05 16:29 in Robotics
I have a serial to usb connection and I cant load codes from basic stamp for some reason. Can anyone help?

Comments

  • ercoerco Posts: 20,256
    edited 2011-10-02 23:07
    Not all USB adapters work properly. Are you certain yours works, or has worked in the past?
  • quarkzquarkz Posts: 4
    edited 2011-10-02 23:11
    Yes. Its a RS-323 serial interface...
    There was a thread from awhile back where one person claimed to fix the problem. He said it was the serial problem but didnt explain what.

    Can anyone help me out please
  • ercoerco Posts: 20,256
    edited 2011-10-02 23:25
    Not all RS-232 serial interfaces work properly, for a variety of reasons. Some output inverted TX/RX signals, others have timing compatability issues.

    So once again, have you previously used this particular adapter to successfully program a Stamp? What type of adapter is it?
  • quarkzquarkz Posts: 4
    edited 2011-10-02 23:43
    This is my first time trying to use it as i have just gotten this adapter today. I really want to mess with my sumobot but they give a serial to serial connector, which is pretty much useless in 2011. I have a PPA serial to usb adapter

    Heres a link:
    http://www.frys.com/product/4322725?site=sr:SEARCH:MAIN_RSLT_PG
  • ercoerco Posts: 20,256
    edited 2011-10-03 08:54
    Parallax swears by the FTDI drivers for its cable: http://www.parallax.com/StoreSearchResults/tabid/768/List/0/SortField/4/ProductID/379/Default.aspx?txtSearch=ftdi+drivers

    You could try try the FTDI drivers if your cable uses the same chipset as Parallax. Which chipset shows up in your device manager, 2102 or 2303?
  • Mike GreenMike Green Posts: 23,101
    edited 2011-10-03 09:20
    As erco has mentioned several times, the problem is probably in your USB to serial adapter. There have been past threads here discussing various USB to serial adapters and a lot of them just don't work for programming Parallax products. They often don't work for programming other microcontrollers either (like the Arduino for example). Most adapters that use the FTDI chips seem to work. I've used Parallax's and some bought directly from FTDI.
  • bee_manbee_man Posts: 109
    edited 2011-10-05 16:29
    What USB port is it using? I think it has to be less than 5, use the "reassign COMNo Utility" from the FTDI website. http://www.ftdichip.com/Support/Utilities/Reassign%20COMNo%20Utility.zip

    I thought my Sumo Bots came with a USB to Serial plug, I may be wrong.

    Jim
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