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Re: [AVR-Chat] USB vendor and product ID

2005-02-27 by Jim White

>
>
> >
> >> On 25 Feb 2005, at 19:14, Jim White wrote:
> >>
> >>> We are developing a board that will be a USB device (not host) using a
> >>> CP2101.
> >>>
> >>> Is there some sort of central registry for Vendor ID and / or Product ID
> >>> ?
> >>>
> >>> This will not be a mass market device but will need to recognizable as a
> >>> unique device when plugged into a PC.
> >
> >With the FTDI chips and EEPROM's, this should be no problem at all, as
> >each device will have a unique serial number.
> >
> >If you want a VID/PID, talk to FTDI, they may assign you a unique PID
> >(if they have any left !)
>
>AFAIK the serial number will not ensure the correct driver is loaded - it 
>only copes with multiple
>devices of the same type plugged in at once.
>
>If FTDI are assigning PIDs numerically, perhaps they will run out in the 
>not too-distant future -
>then they may well be running short - They assigned me some starting D8xx 
>recently...

For what we are doing (only a few 2CP2101/M128 boards will be built and 
used) the cost of registration seems a bit high.  How about a pointer to a 
list of existing VID and/or PID registrations?  If it's at usb.org it's 
well hidden.  That site seems more interested in promoting than helping 
developers.  Is there any sort of 'sand box' of VID/PIDs experimenters can 
play in?

Jim

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