Re: using multiple usbasp connected to PC in the same time

[Klaus]

Am 14.10.20 um 16:05 schrieb Joerg Wunsch:
> As Klaus Rudolph wrote:
>
> > I have no idea how avrdude internally is searching the device, but it
> > looks like that it scans over all usb busses until it finds a device of
> > given type.
>
> This is the way USB works, in general.
>
> > If we are able to restrict the found device type to a specific hardware
> > address like: pci-0000:00:14.0-usb-0:1.6:1.0 like we can do in udev
> > rules, we can address each one individual.
>
> libusb abstracts the underlying OS. libusb_device is just an opaque
> pointer to an implementation-defined struct; any details about how
> that OS handles the hardware access is hidden, and cannot be used by
> an application on top of libusb.

Ah, yes, you are right.

What about simply counting found devices and add an optional device
count parameter to avrdude so that a user simply can select "the third
found device of that type"?

Only a suggestion and not an expectation :-)

Thanks
 Klaus