[sane-devel] Canon LiDE 90

[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

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