[Canonscanner-devel] Canon backend for N656U

[R N d. <ran...@ya...>]

Hi 
Unfortunatly at this time i have very little free time and i cannot do
all the test i'd like to do. However i tryed to use usbsniffer under windows
but the most of time it crashed or block my system, hope having more
time as soon as possible to read better the documentation. I've
also put some of Vladimir settings on middle level, but without good
results.
I guess Vladimir's going to work on sane integration maybe i can help
till our hardware is similar.
However i made some changes on file canon_usb.c i added some feature
in addition to the Christian's one.
I added definition of log_printf, but i'd like to add into low level
(canon_usb_low.h) so that it can be used into all levels. What
do you think about it?
Moreover i added the two different ioctl so if the first fails, the second one 
can go on.
For further steps i'd like to add code to read more info on configuration file 
(thanks to Christian for the idea), data like x and y range 
and moreover product_id to make possible to test sane
with similar usb scanner simply cahanging the conf file.
What do you think about this?

Angelo