On Thursday 08 July 2004 17:18, Thibault North wrote: > >:-)))))))))))))))))) > > It hurts badly when reading them on a 75Hz screen :)) > > >> 00000000: 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f > >> 00000010: 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f > > > >Hmm, seems that these are some lookup-tables - IMHO could be ignored, > >as long, as your "future" driver will do the same... > > Ok. It means that SANE will take care of that? (Sorry not very familiar > with SANE, and don't know what I have to do and what is already done. > But apparently with this wonderful SANE project I have just to give my > scanner's specifications (how the chipset works) isn't it ?
No, no it's not that easy, you have to take care of that of course, because you often need to load these values to internal scanner buffers. But the=20 register read/write stuff is more interesting, downloading some bytes to an internal buffer is not the thing... > > >>2) Others seems to be more interesting : > >> > >>Urb 16 (C) ep=3D (write) 3 ms > >> 00000000: 44 > >> 00000000: 40 0c 88 00 00 00 01 00 > >> > >>But are rare. > > > >These are important -> register I/O > >What's the chipset inside? looks like some genesys logic chipset! > > Really ? sane-find-scanner -v -v doesn't find the chip's type, but if it > is close to it, I would be pleased to have informations about that :) > You can look at http://home.gna.org/canoscan5000f/sniff/ for other > gzipped logs, i you want to verify that :) Well I can do this, but I'm not expert on that. In the end it reminds me of the protocol of the Genesys Logic Parallel to USB bridge - see u12-io.c And some stuff found in the experimental genesys backend... Which version of sane-find-scanner did you use - the latest one also=20 checks for the 841, but it might not cover all incarnations. There is also a GL842 and a 843 available - see: http://www.genesyslogic.com/econtents/product01.asp?minicidx=3D3&lastcidx= =3D18 > > >>- for 2) Are all these short orders all important ? And does "(write)" > >>mean "data sent to scanner" and "(read)" data recieved mean "data read > >>from scanner" ? > > > >AFAIK - yes. Mostly something will be written to the scanner, to tell it, > > that with the next read, data will be red. > > AFAIK =3D ? (Sorry, I don't know enought english to know abbreviations > (You must certainly already got it :)) )) > Ok for that. =46or such stuff have a look at: http://www.acronymfinder.com/ ;-) > > >>-for 3) If this is parf of scanning data, why do I find this type of =A7 > >>later too ? Does it correspond to a "flush" from scanner after having > >>scanned a little part ? > > > >What do you mean? I guess, that there will be some kind of calibration, > >where you'll find image data too before scanning. > > I was wondering if the image data could be sent in may times, or if as > you suggest there is some calibration : indeed the Windows driver says : > "lamp adjusment, please wait" or something like that in French :) Simply waiting until the lamp is stable... Anyway good luck Gerhard