[sane-devel] Canan CanoScan 8400F backend driver
Le mercredi 14 septembre 2011 10:22:26 Joachim Franek, vous avez ?crit : On Wednesday 14 September 2011 06:32:44 Chris Riddoch wrote: I also have a CanoScan 8400F, and may be able to assist with testing. I currently don't have a Windows system available to do USB snooping with, so I'm not sure whether I can be of much use for development... -- Chris Riddoch Same for me. During october I (hope) can do some programming, if someone tells me, what to do. Joachim Hello, thanks for volunteering for testing and coding. I am currently not aware of any development for this gl847 based scanner. Regards, Stef
[sane-devel] Canan CanoScan 8400F backend driver
I too, am willing to test and do some coding, but not as a lead programmer. I thought I saw a thread by someone who was working on it. I do currently have a few desktops, and enough parts to make more and plenty of copies of various versions of windows. Although I doubt I have a copy of Windows 7 (of 9?). If pushed comes to shove, I might even be able to locate my Windows v1.01. ;') I have spec sheets on most (all?) of the chips, at my subterranean workstation. [No, I'm not living in my mom's basement! ;')] Brian On Wed, September 14, 2011 6:42 am, stef wrote: Le mercredi 14 septembre 2011 10:22:26 Joachim Franek, vous avez ?crit : On Wednesday 14 September 2011 06:32:44 Chris Riddoch wrote: I also have a CanoScan 8400F, and may be able to assist with testing. I currently don't have a Windows system available to do USB snooping with, so I'm not sure whether I can be of much use for development... -- Chris Riddoch Same for me. During october I (hope) can do some programming, if someone tells me, what to do. Joachim Hello, thanks for volunteering for testing and coding. I am currently not aware of any development for this gl847 based scanner. Regards, Stef
[sane-devel] Canan CanoScan 8400F backend driver
Le mardi 30 ao?t 2011 16:34:15 brian at amason.net, vous avez ?crit : I can tell you for sure the 8400F runs on a GL843 processor. I took mine apart years ago in thinking I would be able to develop a driver. I'm fairly certain I posted the entire guts of the scanner years ago. Both to this list and to other places. But like Allesandro, I haven't the time to develop one. I will however gladly test any developing 8400F drivers. I mean really test. I will even test the negatives scanner including medium format pictures and all. I would also help fine tune some parts of such a driver, if necessary. The purpose of this scanner was meant to scan and preserve very old negatives including a good number of large and medium format negatives. Brian Hello, thanks for the confirmation. One quick test would be to add this device in genesys_device.c by cloning the G4050 entry, and add its USB id in genesys.conf.in, then compile and run to see what it gives. When doing development, I don't do 'make install' for a version I test, I use the appended script place in the backend subdirectory to run scanimage (or xsane). Read it and edit the line that fits the test you want to do. For instance to do a quick 'what if' test I would do a preview. In the long run, the usual source of data it to run it under windows and record USB activity with UsbSnoop. Then decode it to find how it should be run by the backend. Regards, Stef -- next part -- A non-text attachment was scrubbed... Name: run-genesys Type: application/x-shellscript Size: 895 bytes Desc: not available URL: http://lists.alioth.debian.org/pipermail/sane-devel/attachments/20110901/9c94001f/attachment.bin
[sane-devel] Canan CanoScan 8400F backend driver
I can tell you for sure the 8400F runs on a GL843 processor. I took mine apart years ago in thinking I would be able to develop a driver. I'm fairly certain I posted the entire guts of the scanner years ago. Both to this list and to other places. But like Allesandro, I haven't the time to develop one. I will however gladly test any developing 8400F drivers. I mean really test. I will even test the negatives scanner including medium format pictures and all. I would also help fine tune some parts of such a driver, if necessary. The purpose of this scanner was meant to scan and preserve very old negatives including a good number of large and medium format negatives. Brian On Mon, August 29, 2011 11:50 am, John McGill wrote: The 8400f is reported to have a GL843 processor. Study the source code of the genesys backend. You may be able to clone the settings of an existing supported GL843 scanner. https://help.ubuntu.com/community/CheckIfScannerIsClone Stef Voltz maintains the genesys backend and may be able to help you.
[sane-devel] Canan CanoScan 8400F backend driver
Hi, I would like to attempt to create backend support for the Canon CanoScan 8400f Scanner.I am finding it difficult to to find information on how to start as I have never done this before.I can program in C but have no experience in writing back end drivers. Can anyone point me to some information are tell me a good place to start? Chris -- next part -- An HTML attachment was scrubbed... URL: http://lists.alioth.debian.org/pipermail/sane-devel/attachments/20110829/5d991ab4/attachment.html
[sane-devel] Canan CanoScan 8400F backend driver
On Mon, Aug 29, 2011 at 5:01 AM, Chris Molanus chrismolanus at hotmail.com wrote: Hi, I would like to attempt to create backend support for the Canon CanoScan 8400f Scanner. I am finding it difficult to to find information on how to start as I have never done this before. I can program in C but have no?experience?in writing back end drivers. Can anyone point me to some information are tell me a good place to start? Chris -- There are already some Canon ADF drivers that work pretty well. The process is not that simple as there are a lot of details regarding mechanical movements, sensors and there is always the possibility of damage to the device while developing. The usual method is to snoop the comm between the OS and the scanner by using the officially supported driver in the supported OS, e.g. the Windoze driver. Is the interface is USB you can use the USB Snoop program and capture a sample scan of a black and white page and then a color one. Your test subjects should be large rectangles of color and/or black so it makes it easier to identify the image data block. It's a painstaking job but you need to figure out the protocol first. You will need background into many subjects of which C is probably the least of your worries. Before you talk to the scanner in Linux you need to understand about the USB subsystem, probably deal with libusb, udev and/or hal (a.k.a. hell ;-) ) and many other layers of software and options that Sane handles. Remember that Sane runs on many types us *nix set-ups so there are *many* options and paths to talk to the hw. I wanted to build a driver myself a few years ago, but even with 23 years of work experience in the field, I decided to hire someone from this list and then just helped to snoop, test, debug and even hack the driver a little bit. This experience taught me the basics of sane driver building and hacking and I can now appreciate some of the complexities of this. Of course, given enough time, you will eventually become an expert, but at least in my case I usually don't have much free time to head-bang at something that requires a very wide of skills and I'd rather focus my time on the expertise I already have. YMMV of course. Your best option IMHO is to download the Sane and Sane Backends source code and look at the existing Canon drivers. Who knows, the current drivers may even work with the 8400f, and you could contact the author of some of these drivers directly and perhaps they could dedicate some one-to-one time which you'll probably have to pay for but in my case it was completely worth it. Hope this helps, -- Alejandro Imass
[sane-devel] Canan CanoScan 8400F backend driver
The 8400f is reported to have a GL843 processor. Study the source code of the genesys backend. You may be able to clone the settings of an existing supported GL843 scanner. https://help.ubuntu.com/community/CheckIfScannerIsClone Stef Voltz maintains the genesys backend and may be able to help you. Jack On Mon, Aug 29, 2011 at 7:41 AM, Alejandro Imass ait at p2ee.org wrote: On Mon, Aug 29, 2011 at 5:01 AM, Chris Molanus chrismolanus at hotmail.com wrote: Hi, I would like to attempt to create backend support for the Canon CanoScan 8400f Scanner. I am finding it difficult to to find information on how to start as I have never done this before. I can program in C but have no?experience?in writing back end drivers. Can anyone point me to some information are tell me a good place to start? Chris -- There are already some Canon ADF drivers that work pretty well. The process is not that simple as there are a lot of details regarding mechanical movements, sensors and there is always the possibility of damage to the device while developing. The usual method is to snoop the comm between the OS and the scanner by using the officially supported driver in the supported OS, e.g. the Windoze driver. Is the interface is USB you can use the USB Snoop program and capture a sample scan of a black and white page and then a color one. Your test subjects should be large rectangles of color and/or black so it makes it easier to identify the image data block. It's a painstaking job but you need to figure out the protocol first. You will need background into many subjects of which C is probably the least of your worries. Before you talk to the scanner in Linux you need to understand about the USB subsystem, probably deal with libusb, udev and/or hal (a.k.a. hell ;-) ) and many other layers of software and options that Sane handles. Remember that Sane runs on many types us *nix set-ups so there are *many* options and paths to talk to the hw. I wanted to build a driver myself a few years ago, but even with 23 years of work experience in the field, I decided to hire someone from this list and then just helped to snoop, test, debug and even hack the driver a little bit. ?This experience taught me the basics of sane driver building and hacking and I can now appreciate some of the complexities of this. Of course, given enough time, you will eventually become an expert, but at least in my case I usually don't have much free time to head-bang at something that requires a very wide of skills and I'd rather focus my time on the expertise I already have. YMMV of course. Your best option IMHO is to download the Sane and Sane Backends source code and look at the existing Canon drivers. Who knows, the current drivers may even work with the 8400f, and you could contact the author of some of these drivers directly and perhaps they could dedicate some one-to-one time which you'll probably have to pay for but in my case it was completely worth it. Hope this helps, -- Alejandro Imass -- sane-devel mailing list: sane-devel at lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject unsubscribe your_password ? ? ? ? ? ? to sane-devel-request at lists.alioth.debian.org
