Disables having USB enabled for boards that configure USB CDC for
console, shell or logging at bootup in applications that enable USB
to prevent a conflict arising whereby USB is registered from
multiple points and later calls fail.
Signed-off-by: Jamie McCrae <jamie.mccrae@nordicsemi.no>
Remove Kconfig file samples/subsys/usb/usb_pid.Kconfig added in
the commit e5cbe6a9e7 ("usb: cdc: Add unique PIDs for each sample")
with the motivation to have a separate ID for each sample supposedly
to be recognizable by the host.
The new USB support does not use the options, VID/PID is set
directly in the application. As a note, it is not necessary to have
unique PID for each sample, especially for the well known USB classes.
Replace the individual Kconfig options in the documentation
by a table with the references to the samples and PIDs.
Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>
Add loopback function. This function can be used to test
USB device drivers and device stack connected to linux host
and has the similar interface as "Gadget Zero" [1] of the Linux
kernel.
Use modprobe usbtest to load the module, see also [2] for the
description of the tests and for Vendor and Product ID of the
"Gadget Zero". The userspace tool testusb [3] is needed to start
the tests.
[1] linux/drivers/usb/gadget/function/f_loopback.c
[2] linux/drivers/usb/misc/usbtest.c
[3] linux/tools/usb/testusb.c
Signed-off-by: Johann Fischer <j.fischer@phytec.de>
