Actually, all of my test programs (for testing my reverse engineering efforts) have been done in libusb-1.0.

I would actually like to write kernel-level drivers though for these.

Hans Petter Selasky wrote:
On Thursday 26 August 2010 19:59:18 Jim Bryant wrote:
i have some usb devices, in the hid class, that i am wanting to write
some drivers for.

seeing that one of these previously had an older non-submitted driver
for 5.x-7.x online, i thought that might be a good starting point (the
imon vfd/lirc driver), but that does not work, due to the changes in the
usb subsystem.

where can i find documentation on this subsystem?

are there any decent skeletons to start with, or does this need to be
from scratch?

i'd like to start with a driver for the pcsensor temper usb thermometer,
for which i already wrote a libusb util for, since these are widely
sold, and very popular (and usually around $5 USD), and since it only
has one transaction (read current temp), I figure it would be easier to
start with while I learn the usb driver framework.

as for the imon vfd unit, i'd like to tackle that next.  i have written
libusb utilities for all of the display functions supported, and have
documented the knob/button interrupt packets (only three packet types,
clockwise, counterclockwise, and button down).  all of the remote
control functions are well-documented in lirc.

i've been looking through the sources in the sys tree, but would like to
find some comprehensive documentation of the new usb subsystem, and
maybe someone who can give me pointers as i go.

jim

Hi,

Feel free to post patches here.

Some choices you have:

Use libusb v1.0 or v0.1 if you need portability.

Else use libusb v2.0.

All three versions are contained in -lusb on FreeBSD 8+.

Sylvestre Gallon had some libusb examples in his USB P4 repositorium. Else if you have questions regarding libusb you can ask either here or at:

libusb-de...@lists.sourceforge.net

--HPS


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