[sane-devel] Canon LiDE 90

[Guillaume Gastebois]

Hello,

I see that reg[2] was like 0x07. So INVOP was still set !!!
I comment out offset_calibration in genesys_flatbed_calibration, set 
reg[2] to 0x03, and I get a black image with a gray vertical line in the 
middle !!!
I try to reenable offset_calibration and I get : 
http://ggastebois.free.fr/lide90_snoop/toto_10_0_0_invop_0.jpg
In the central vertical line we can see a piece of my dinosause not 
reverted !!! I think this works. And good news : the frontend seems to 
be (or to be compatible) with a wolfson wm8199.

If you remember, this gray line is on the vertical of the small black 
piece (in calibration area). So calibration is better with black area !!

Regards
Guillaume

Pierre Willenbrock a écrit :
> Guillaume Gastebois schrieb:
>> Hello,
>>
>> I modified registers 10-1d with :
>>
>> {0x04, 0xd3, 0x04, 0xd3, 0x02, 0xa3, 0x20, 0x06, 0x00, 0xff, 0x24, 0x00, 
>> 0x00, 0x04},
>>
>> and now the led is really white (red green and blue by moving eyes).
>>
>> Led calibration seems to be good.
>>
>> But calibration is always 60s long.....
> 
> http://ggastebois.free.fr/lide90_snoop/scanimage.log
> says you have offset_calibration enabled. that cannot work currently.
> offset_calibration fiddles with the Frontend offset parameters and will
> make the following calibration steps fail. Comment that out in
> genesys_flatbed_calibration for now.
> 
> Apart from that, please try to toggle the INVOP bit, that is
> bit2(counting from 0) of Setup Register 2. This may fix the inverted
> image. Looking at the Block diagram of the WM8199, the calibration may
> still need to be changed if INVOP=1, but it is worth a try.
> 
> Regards,
>   Pierre
> 
> 
>