[sane-devel] Genesys HP scanjet 2400
carlos at superkaos.jazztel.es
Wed Apr 19 21:38:43 UTC 2006
On 06/12/05 22:30, Stéphane VOLTZ wrote:
> sorry to have taken so long to answer, but I have little time and many things
> to do ... However, I believe it isn't helpful to modify the warmup that way.
> You have to set up the right register values instead. Also, you have to make
> sure that the scanner is using an area suitable for it, if the head is on a
> black area, no warmup will succeed.
> If I had enough time, here's how I'd do:
> - get a windows usb log of a colour preview, just after powering-up scanner
> - extract from it the values to put in genesys_devices regarding constants in
> Genesys_Frontend, Genesys_Sensor, Genesys_Gpo, Genesys_Motor.
> Current values aren't considered exact, testing is needed.
> - by running scanimage with full debug and comparing it's output with decode
> usb log, modify the genesys_gl646.c file to take 2400 specifics
> into account. Every places where is a xxx_HP2300 constant is a
> The HP2300 and MD5345 use a method to build slope tables which is superseded
> by the method used for GL841 parts. This newer method should be preferred.
> That involves using the newer exposure time comptuing function.
> I again attach the scripts I use to turn an usb log into something more
> suitable for developpement. I tested it on HP2400 logs I have. I think have
> all the elements to finish support for 2400 but I'm missing an essential
> thing: the scanner itself.
I have tried to use your awk scripts on the windows usb logs. There seems to
be a missing file from your tarball, here's what I get when I run decode.sh:
reformatting data ...
compacting URBs ...
awk: fatal: can't open source file `parse1.awk' for reading (No such file or directory)
Needless to say I get an empty output file.
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