USB product ID suggection

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  • May 19, 2012 at 9:01 pm #1218
    greyhound716
    Member

    Guys,

    At the moment, the product and vendor IDs for the FTDI chip are the factory default. While it works fine, it might be worth getting a custom product ID from FTDI – it looks like they provide them free of charge. It would make it autodetection a little more reliable. Not high on the list, but something to consider.
    -Matt

    May 21, 2012 at 10:19 am #1219
    Riley
    Keymaster

    Really good idea. I didn’t know you could register that? Have you done this before? Is its a matter of purchasing “custom” ftdi chips?

    Riley

    May 21, 2012 at 8:54 pm #1220
    greyhound716
    Member

    I don’t know much about it, just was reading some of the FTDI spec docs to learn a little more about the USB interface. It appears that the PID and VID can be set in the internal eeprom using USB commands. See bottom of page 34 in http://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT232R.pdf. It appears that as long as you use the FTDI VID, they will give you a free block of PIDs if you ask nicely. I suspect getting a VID would require going through the USB trade group and paying a lot of money – not really worth it IMO.
    -Matt

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