Writing to a USB Device

[Karl Larsen]

John wrote:
> Hi,
>
> I'm gathering the courage to write a program which controls an external 
> device via a USB port. The development and target operating systems are 
> Ubuntu 8.
>
> Are there any good books or web sites which would give me an idea of 
> what is involved?
>
> TIA
>
> J
>
> (Although couched as a general question, the external device is a Lenz 
> LVZ100 Model Railway controller!)
>
>
>   
    Well it should be a short book. To see what device your USB device 
is plugged into use $dmesg | tail and you see this:

[ 1356.357939] usb 1-2: new full speed USB device using ohci_hcd and 
address 2
[ 1356.570089] usb 1-2: configuration #1 chosen from 1 choice
[ 1356.783916] Linux video capture interface: v2.00
[ 1356.815570] 
/build/buildd/linux-ubuntu-modules-2.6.24-2.6.24/debian/build/build-generic/media/gspcav1/gspca_core.c: 
USB GSPCA camera found.(SPCA561A)
[ 1356.828914] usbcore: registered new interface driver gspca
[ 1356.829686] 
/build/buildd/linux-ubuntu-modules-2.6.24-2.6.24/debian/build/build-generic/media/gspcav1/gspca_core.c: 
gspca driver 01.00.20 registered
[  864.631564] process `skype' is using obsolete setsockopt SO_BSDCOMPAT

This tells you all about it.

Not sure what other things you can learn :-)

Karl




-- 

	Karl F. Larsen, AKA K5DI
	Linux User
	#450462   http://counter.li.org.
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