Thierry de Coulon wrote: > Hello, > > I've purchased this cute little scanner partly because there were infos about > a (proprietary) linux driver - but Pentax says it was for an older model and > Linux support has been dropped. > > I thought I'd take a look at writing a backend, however I know little if > anything about such things, including C language, so I have little hope. > > Anyway, I ran usb snoop from a vmware machine and I have put the resulting > log > here: > > http://www.decoulon.ch/dsmobile600_log.txt.zip > > In case anyone who knows more about this stuff wants to take a look.
It looks like another parallel-over-USB protocol: * Control transfer with Value=82 is used to setup a bulk transfer. Bytes 4-7 in the transfer data contain the length of the bulk transfer in little endian encoding. * Control transfer with Value=83 is used to write data (even bytes in control data block is the register address and odd bytes are the data to write). * Control transfer with Value=84 is used to read data from the last register addressed. Although the protocol looks similar to other protocols I looked at, this particular implementation is new to me. Besides knowing the protocol to set/get data in the scanner controller, you'll also need to figure out what each register does (and I fear that's the hard part). Kind regards, Bertrik
