[sane-devel] Canon LiDE 90

Thu Mar 27 19:40:04 UTC 2008

Hello,

Selon Pierre Willenbrock :
> Guillaume Gastebois schrieb:
>> > Hello,
>> > 
>> > Yesterday I added CCD_CANONLIDE90 in genesys.c. I did two successive scans
>> > (result on http://ggastebois.free.fr/lide90_snoop/25_test1.zip).
>> > The first one gives a bright image (1_test1.txt), the second a dark image
>> > (3_test1.txt). Which log seeems to be the best for calibration ? (in
>> > 3_test1.txt, I see device I/O errors !!!)
>> > What are good values for offset_calibration: black/white pixels ?
>> > 
>> > Another thing : Pierre, you send me few weeks ago a code named entropy2D.c. I
>> > compile it with : gcc -c entropy2D.c, gcc -lm -o entropy2D entropy2D.o. No
>> > errors. I call it with entropy2D ./offset1_1.pnm and it makes nothing and newer
>> > gives hand back !!! What did I wrong ??? (I want to test common nibbles).
> 
> it accepts data on stdin, and outputs a pgm on stdout:
> ./entropy2D < ./offset1_1.pnm > histogram.pgm

OK, works. Can you tell me what you think about attached image 
(entropy2D of offset1_1.pnm) ?
> 
>> > For scanner locks up writing 0x41=0xf4, It signify that scanner things he's not
>> > hat home position. (home position : 0x41=0xfc). I thing it will be interessting
>> > to move a little bit head. How to do that ? My explanation is that on previous
>> > scan, the head has pressed home switch, but if head after that moves (less than
>> > a millimeter is enought) switch can no more be pressed. So moving back head may
>> > be usefull (but Isn't still made ?)
> 
> To my knowledge, if the backend tests register 0x41, it thinks the 
> scanning head should be moving, but it apparently is not.
> 

I didn't see something important : it only apears on scanner powerup. 
Locks up is away after pressing button 3 or 4 (not 1 ou 2 !). It's a 
power up issue.

>> > 
>> > I did another ant work : comparing all regs from windows snoop to sane and I
>> > find these differences :
>> > 
>> > addr |sane   |windows|comments
>> > _____|_______|_______|______________________________________________________
>> > 09   |10     |21     |MCNTSET[1:0] CLKSET[1:0] BACKSCAN ENHANCE SHORTTG NWAIT
>> > 16   |20     |02     |CTRLHI TOSHIBA TGINV CK1INV CK2INV CTRLINV CKDIS CTRLDIS
>> > 19   |50     |ff     |EXPDMY[7:0]
>> > 1a   |00     |24     |X X MANUAL3 MANUAL1 CK4INV CK3INV LINECLP X
>> > 1d   |02     |04     |CK4LOW CK3LOW CK1LOW TGSHLD[4:0]
>> > 52   |02     |02     |RHI[4:0]
>> > 53   |07     |04     |RLOW[4:0]
>> > 54   |00     |02     |GHI[4:0]
>> > 55   |00     |04     |GLOW[4:0]
>> > 56   |00     |02     |BHI[4:0]
>> > 57   |00     |04     |BLOW[4:0]
>> > 5d   |00     |20     |HISPD[7:0]
>> > 5e   |02     |41     |DECSEL[2:0] STOPTIM[4:0]
>> > 5f   |00     |40     |FMOVDEC[7:0]
>> > 67   |00     |40     |STEPSEL[1:0] MTRPWM[5:0]
>> > 68   |00     |40     |FSTPSEL[1:0] FASTPWM[5:0]
>> > 69   |00     |08     |FSHDEC[7:0]
>> > 6a   |00     |04     |FMOVNO[7:0]
>> > 70   |21     |05     |X X X RSH[4:0]
>> > 72   |00     |07     |X X X CPH[4:0]
>> > 73   |00     |09     |X X X CPL[4:0]
>> > 75   |00     |01     |CK1MAP[15:8]
>> > 76   |00     |ff     |CK1MAP[7:0]
>> > 79   |00     |3f     |CK3MAP[7:0]
>> > 7c   |00     |1e     |CK4MAP[7:0]
>> > 7d   |00     |11     |CK1NEG CK3NEG CK4NEG RSNEG CPNEG BSMPNEG VSMPNEG DLYSET
>> > 7f   |00     |50     |BSMPDLY[1:0] VSMPDLY[1:0] LEDCNT[3:0]
>> > 82   |00     |0f     |ROFFSET[7:0]
>> > 84   |00     |0e     |GOFFSET[7:0]
>> > 86   |00     |0d     |BOFFSET[7:0]
>> > 
>> > I think regs 09, 16, 19, 1a, 1d, 52, 53, 54, 55, 56, 57, 70, 72, 73, 75, 76, 79,
>> > 7c, 7d, 7f may be interessting, but I'll try to modify all.

If i write 0x16=02, 0x1a=24 and 0x1d=04 : I get some bad image (gray 
with horizontal black lines).

With others regs, no change.

>> > 
>> > My next work will be analysing windows snoop for gpio transaction.

gpio18 and gpio17 are always 1. 0x6d 0x6e and 0x6f have alwase same 
values (80 7f e0). Only 0x6c moves but I don't now how to know in 
windows snoop when (before/after calibration/scanning...)

>> > 
>> > Regards
>> > Guillaume
>> > 
> 

Regards
Guillaume
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