H Ben, > I'm trying to add support for the S1300i to the epjitsu backend.
So am I (although not active currently) > 1) There are quite a few commands used by the S1300i Windows driver > which aren't mentioned in epjitsu.c. All the unknown command sequences > I've seen are collected together in unknown-commands.log: > > - b0/b2/b3/b4: these seem to set a byte (b0/b2 could be a boolean) > - b5/b6: these seem to get a u16 (b5 always gives 0x19, 0x00 and b6 > always gives 0x10, 0x1e) > - d8: probably sets a boolean (I've seen both 0 and 1) > - e1: another byte/boolean > - 24: receives 256 (!) bytes (no idea what for, but it only appears in > init.log, not any of the scan logs) > > Have you come across any of these before? If not, is there any Fujitsu > documentation? Or has the whole driver been reverse engineered? > > 2) As assumed in epjitsu-cmd.h, most of the magic data I've extracted > is the same for a given resolution. However it seems that the c3/c4 > cal headers are different for every combination of settings I've tried > (compare e.g. 300 at color-300-simplex-stop.pcap.h with > 300 at gray-300-simplex-stop.pcap.h). Could this actually be the case > with the S300 too? There are commented-out values for these for the > S300 so possibly there was some confusion as to their correct values. > > 3) Do you have any tips for deducing the integer values in model_res? > Do you just work backwards from what the Windows driver transferred? > For example, I've got the scanner as far as the first c6 coarse cal > but it's under reading at the moment. The Windows driver reads 48584 > bytes at 300dpi but epjitsu only attempts 24576 (line_stride 24576, > height 1) if I copy the S300 settings. I assume you started your work off patch 21? If you search back a bit in the mailinglists (mid March) you can find some USB dumps of me too... I have quite a few notes but they are in analog form (read: physical notebook). I got kinda stuck between doing the work based on s300 (which fails on coarsecal) or s1100 (which fails on coarsecal2). Allan Noah is the reference/author of the fujitsu backend, he told me everything he knows is in the sources but the comments are sometimes a bit thin. I'll dive into this again and I hope we can crack this one together :) Peter
