[sane-devel] Canon LiDE 90
Hello,
I'm back.
Today I made two tests : one with un commenting line 1159 and adding
regs 0x71, 0x72, 0x73, 0x75, 0x76, 0x79, 0x7c, 0x7d, 0x7f in
gl841_init_registers.
Result is a totally black image
(http://ggastebois.free.fr/lide90_snoop/04_test1.tar).
The other is with un commenting line 1159 and without adding regs 0x71,
0x72, 0x73, 0x75, 0x76, 0x79, 0x7c, 0x7d, 0x7f in gl841_init_registers.
Result is a totally black image too
(http://ggastebois.free.fr/lide90_snoop/04_test2.tar).
Regards
Guillaume
Pierre Willenbrock a ?crit :
> Guillaume Gastebois schrieb:
>> Hello,
>>
>> I modified these registers. But the scanner locks writting continiously :
>> "[genesys] sanei_genesys_read_register (0x41, 0xf4) completed".
>>
>> I modified 0x1a=0x24 and 0x1d=0x02 in Genesys_Sensor. In log I see
>> 0x1d=0x02 but 0x1a=0x00 ??
>
> For the missing change of 0x1a: The code block for setting this value
> (along with 0x1b..0x1d, which is then hardcoded to 0x02) is commented
> out, genesys_gl841.c:1159. This is probably the case, because they were
> not needed for my specific scanner.
>
> I cannot explain the lockup. I'd play around with different sets of
> registers and see if they work. But i guess, register 0x1a is a key to
> get the rest working.
>
>> I will be long for next answer as I take one week holidays !
>
> I hope you had a nice week holidays.
>
> Regards,
> Pierre
>
>> regards
>> Guillaume
>>
>> Pierre Willenbrock a ?crit :
>>> Hi,
>>>
>>> Guillaume Gastebois schrieb:
Hello,
> So, we need to check what parts of the clocking we need to setup
> differently.
>
> Candidates:
>
> reg sane windows
> 0x1a 0x00 0x24 enable clock 3,4 manual output, invert clock 4
> 0x1d 0x04 0x02 just a smaller toggle "shoulder".
> 0x71 0x00 0x05 RS signal seems to be not used.
> 0x72 0x00 0x07 CP signal seems to be not used.
> 0x73 0x00 0x09 CP signal seems to be not used.
> 0x75 0x00 0x01 clock 1 bitmap
> 0x76 0x00 0xff clock 1 bitmap
> 0x79 0x00 0x3f clock 3 bitmap
> 0x7c 0x00 0x1e clock 4 bitmap
> 0x7d 0x00 0x11 change RS on falling edge of system clock, use DLY
> 0x7f 0x00 0x50 delay each of BSMP and VSMP by 8.33ns (DLY)
>
> The clock 1 stuff seems to be not needed, as it is in automatic mode.
> But clock 3/4 look interesting. The delay of BSMP/VSMP may be useful, too.
>
0x1a was still 0x24. I modified 0x1d which was 0x04 to 0x02. Result is
on http://ggastebois.free.fr/lide90_snoop/22_test1.tar.
I doesn't find where to modify 0x71-0x7f !!!
>>> Add them to gl841_init_registers.
>>>
>> Another thing : I always have a brither vertical line where there is a
>> small black rectangle in the calibration area.
> The small black rectangle is included when acquiring the white level.
> Reduce shading_lines(second to last entry) in Genesys_Model to 250, that
> way it is not seen anymore.
>
Done, works.
> Oh, and please update from cvs again. A small mistake in
> gl841_bulk_write_registers made the debug register dumps useless.
>
Done.
Another thing : when I make several scan with sane backend and sane
command line, I have alternatively brite and dark images !!! Why ???
>>> The calibration is probably giving widely differing results with
>>> different starting conditions. It swings between two states. But you
>>> shouldn't see this after the gl842 did its shading correction. Then, the
>>> problem is probably overexposure of the ccd cells. Try reducing the
>>> upper threshold in genesys_gl841.c:4383
>>>
>>> if (avge > 2000) {
>>> expr = (expr * 2000) / avge;
>>> expg = (expg * 2000) / avge;
>>> expb = (expb * 2000) / avge;
>>>
>>> Reducing the lower threshold may be needed, too. The current values for
>>> your scanner are:
>>> expr: 1235
>>> expg: 1235
>>> expb: 675
>>>
>>> No guarantee that this helps at all.
>>>
Regards
Guillaume
>>> Further, we need to figure out a way to get the LEDs go completely dark.
>>> 0x101 is just about half of 675. I will experiment a bit with my
>>> scanner, to find out if the gl842 can do that.
>>>
>>> Regards,
>>> Pierre
>>>
>>>
>
>
>
[sane-devel] Wired behavior of hp scanjet 6200C
Hi there, i've some trouble with my HP ScanJet 6200C which is connected via USB to my PC. First time i run 'sane-find-scanner' it's output is found USB scanner (vendor=0x03f0 [Hewlett-Packard], product=0x0201 [HP ScanJet 6200C]) at libusb:002:003 So i tried to run scanimage without any options (since i've only one scanner connected)...: > scanimage P4 # SANE data follows 2550 3507 scanimage: sane_read: Error during device I/O Ok, I/O errors are common these days, so i tried again, but it just said 'scanimage: no SANE devices found'. Running sane-find-scanner again outputs the following now: found USB scanner (vendor=0x03f0, product=0x0201) at libusb:002:003 What's gone wrong? I'm running Debian etch with Debian kernel 2.6.18-6-k7 on AMD with an nVidia MCP51 USB host controller. dmesg says: ohci_hcd :00:0b.0: wakeup usb 2-1: new full speed USB device using ohci_hcd and address 3 usb 2-1: configuration #1 chosen from 1 choice usb 2-1: usbfs: USBDEVFS_CONTROL failed cmd sane-find-scann rqt 128 rq 6 len 2 ret -110 usb 2-1: usbfs: USBDEVFS_CONTROL failed cmd sane-find-scann rqt 128 rq 6 len 2 ret -110 I'm wondering if that error is sane or kernel-driven since sane-find-scanner seems to find the scanner but doesn't recognise the driver for it after trying to scan. Any thoughts? Tobias -- Remember, gravity is not just a good idea. It's the law. And it's not subject to repeal. -- next part -- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 189 bytes Desc: Digitale PGP-Unterschrift Url : http://lists.alioth.debian.org/pipermail/sane-devel/attachments/20080304/f7ff813f/attachment.pgp
[sane-devel] Wired behavior of hp scanjet 6200C
i have a similar 6300C scanner, and have found it to be quite flakey connected to any nForce usb controller, sometimes works, sometimes not, but never the same thing two times in a row. These machines seem to be not-quite usb 1.1 compatible, so i only use mine on scsi. allan 2008/3/4 Tobias Lohner : > Hi there, > > i've some trouble with my HP ScanJet 6200C which is connected via USB > to my PC. > > First time i run 'sane-find-scanner' it's output is > > found USB scanner (vendor=0x03f0 [Hewlett-Packard], product=0x0201 [HP > ScanJet 6200C]) at libusb:002:003 > > So i tried to run scanimage without any options (since i've only one > scanner connected)...: > > > scanimage > P4 > # SANE data follows > 2550 3507 > scanimage: sane_read: Error during device I/O > > Ok, I/O errors are common these days, so i tried again, but it just > said 'scanimage: no SANE devices found'. Running sane-find-scanner > again outputs the following now: > > found USB scanner (vendor=0x03f0, product=0x0201) at libusb:002:003 > > What's gone wrong? I'm running Debian etch with Debian kernel > 2.6.18-6-k7 on AMD with an nVidia MCP51 USB host controller. > > dmesg says: > > ohci_hcd :00:0b.0: wakeup > usb 2-1: new full speed USB device using ohci_hcd and address 3 > usb 2-1: configuration #1 chosen from 1 choice > usb 2-1: usbfs: USBDEVFS_CONTROL failed cmd sane-find-scann rqt 128 rq > 6 len 2 ret -110 > usb 2-1: usbfs: USBDEVFS_CONTROL failed cmd sane-find-scann rqt 128 rq > 6 len 2 ret -110 > > I'm wondering if that error is sane or kernel-driven since > sane-find-scanner seems to find the scanner but doesn't recognise the > driver for it after trying to scan. > > Any thoughts? > > Tobias > > -- > Remember, gravity is not just a good idea. > It's the law. > And it's not subject to repeal. > > > > -- > sane-devel mailing list: sane-devel at lists.alioth.debian.org > http://lists.alioth.debian.org/mailman/listinfo/sane-devel > Unsubscribe: Send mail with subject "unsubscribe your_password" > to sane-devel-request at lists.alioth.debian.org > -- "The truth is an offense, but not a sin"
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