Re: [avrdude-dev] avrrftdi driver port selection

[Hannes Weisbach]

Am 15.01.2014 um 10:52 schrieb Jonathan Schneider <address@hidden>:
> 
> But I am absolutely baffled as to what port to specify.
The FT2232D should work out of the box, if you didn’t change the
VID/PID.
> 
> If I put usb:999 or even complete garbage after the -P I don’t get any kind 
> of meaningful error but does seem to know whether I have the FT2232D plugged 
> in regardless of -P. It looks as if port selection is somehow completely 
> automatic and -P is ignored. What if I have more than one FT2232D ?
You need to put the USB VID/PID of your FTDI in hex after -P like so:
'-P 0403:6010‘.  Why did you feel the need to put '-P usb:n‘ in the
avrdude command line?
> 
> I cannot find clear documentation on how to specify the port for accessing 
> this kind of device beyond a mention of usb:N which doesn’t seem to do 
> anything. Maybe I have failed to find the right documentation.
I don’t think it’s documented.  I didn’t find it either ;)
> 
> There is a reasonable chance the hardware has a silly mistake as last night 
> was a late one but I would like to know I’ve got the software end right as 
> well so would appreciate some input (and improved documentation for the next 
> person).
If it doesn’t work, please provide the *full* avrdude command line,
with all avrdude output, possibly using -vvvv or -vvvvv.

Best regards,
Hannes