Mickael Profeta wrote: > Jason Anderson wrote: > >> Since I don't know much about writing drivers for Linux, I would like >> to see what Mike Profeta has accomplished on writing a driver. He has >> mentioned that the is writing a driver for the 3670, and they're both >> similar. > > > I would be glad to show you what I have done, but I am in the very > beginning of the work: I try to have informations on the usb transaction > under windows, and unfortunately I can hardly have more than the initial > transaction, and when I am lucky the packets to run a preview scan. > After that, the usb sniffer can not log anything... > If someone has an idea, or some better logs for 3670/2400 or even 2300 > if it shows to be similar, that will be very helpfull....
There was some discussion about this in august of this year. I looked at some logs and noticed that they are similar to logs from other scanners (hp3300, hp3400, hp4300, primefilm 1800i), a kind of parallelport-over-USB protocol. This means that it's quite easy to write some routines that read/write from the internal scanner registers or transfer bulk data. There is a perl USB log tool (originally written by Marian Eicholz) that is able to make the logs more readable (with some persuasion). I think the perl script is also capable of creating a file that can be used to play back previously logged USB transfers. Next thing is to figure out what each register does and write a simple test tool. For example, write a tool that prints the contents of all scanner registers and see how they change with lamp on/off, scanner button pressed etc. Try to capture logs under windows from several scans, where each time a single scan option changes and the rest stays the same, then compare the logs. Kind regards, Bertrik
