[sane-devel] Canon LiDE 90

[Pierre Willenbrock]

Guillaume Gastebois schrieb:
> Hello,
> 
> It's a little bit better with these values.
> In Genesys_Sensor I have :
> regs_0x08_0x0b : {0x00, 0x21, 0x00, 0x00}
> regs_0x10_0x1d : {0x02, 0x8b, 0x02, 0x8b, 0x02, 0x8b, 0x20, 0x06, 0x00,
> 0xff, 0x24, 0x00, 0x00, 0x04}
> regs_0x52_0x5e : {0x02, 0x04, 0x02, 0x04, 0x02, 0x04, 0x0a, 0x71, 0x55,
> 0x00, 0x00, 0x20, 0x41}

looks good so far(very few of these can be found in the log after my
scripts processed them(bug in my scripts), but then they must be okay
when you are able to scan)

> In Genesys_Gpo I have :
> {0x02, 0x80}{0x7f, 0xe0}

i found these differing settings in your log for register 0x6c:
0x00
0x02
0x0a
0x0e
0x10
0x12
0x18
0x1a
0x38
0x3a
0x3e
0x3c

it may be interesting to find out what the effects of these are.

> and now in Genesys_Frontend :
> {{0x00, 0x2f, 0x07, 0x26}
>    , {0x00, 0x00, 0x00}
>    , {0x50, 0x50, 0x50}
>    , {0x28, 0x28, 0x28}
>    , {0x0d, 0x00, 0x00}
>    }

Looks good.

> 
> Are these value acceptable regarding my log
> (http://ggastebois.free.fr/lide90_snoop/UsbSnoop_a4_200dpi.log) ?
> 
> I very appreciate your help.
> 
> Regards
> Guillaume
> 
> P.S : attached a sample image with my values.

Regarding the image: is this with x|y_offset == 0? and are the
horizontal bright lines original?

Regards,
  Pierre

> 
> Pierre Willenbrock a écrit :
>> Guillaume Gastebois schrieb:
>>> OK, but via which register is it programmed. I find nothing in GL842
>>> datasheet
>>> for frontend.
>>>
>>> regards
>>> Guillaume
>>>
>>
>> the analog frontend is programmed through the serial interface accessed
>> by address registers 0x50(FERDA)/0x51(FEWRA) and data registers
>> 0x46/0x47(FERDDATA)/0x3a/0x3b(FEWRDATA).
>>
>> I find this sequence in your log:
>>
>> R/W ! addr ! data  ! WM8199 register
>> ----+------+-------+-----------------
>>  W  ! 0x04 ! 0x000 ! reset
>>  R  ! 0x07 ! 0x041 ! revision number, ==0x41
>>  W  ! 0x04 ! 0x000 ! reset
>>  W  ! 0x01 ! 0x02f ! Setup reg 1: mode4==0, pgafs=2, selpd=1, mono=1,
>> cds=1, en=1
>>  W  ! 0x02 ! 0x007 ! Setup reg 2: del=0, rlcdacrng=0, 0=0, vrlcext=0,
>> invop=1, muxop=3
>>  W  ! 0x03 ! 0x026 ! Setup reg 3: chan=0, cdsref=2, rlcv=6
>>  W  ! 0x06 ! 0x00d ! Setup reg 4: fm=0, intm=0, rlcint=1, fme=1,
>> acycnrlc=0, linebyline=1
>>  W  ! 0x08 ! 0x000 ! Setup reg 5: 0=0, posnneg=0, vdel=0, vsmpdet=0
>>  W  ! 0x20 ! 0x050 ! dac value red(offset value)
>>  W  ! 0x21 ! 0x050 ! dac value green(offset value)
>>  W  ! 0x22 ! 0x050 ! dac value blue(offset value)
>>  W  ! 0x23 ! 0x050 ! dac value rgb(offset value)
>>  W  ! 0x28 ! 0x028 ! pga gain red(0x28 is a factor of 0.85)
>>  W  ! 0x29 ! 0x028 ! pga gain green
>>  W  ! 0x2a ! 0x028 ! pga gain blue
>>  W  ! 0x2b ! 0x028 ! pga gain rgb
>>
>>
>> all WM81xx(at least where datasheets are available) share a similar
>> register layout, with revision 0x41 at address 7. writing to the rgb
>> variant of pga gain/dac value results in writes to all the color
>> specific registers, so it is not needed.
>>
>> So, you have in Genesys_Frontend: reg[1]=0x2f, reg[2]=0x07, reg[3]=0x26,
>> reg2[0]=0x0d, reg2[1]=0x00, the rest of reg/reg2 =0, all sign[x]=0,
>> offset[x]=0x50, gain[x]=0x28.
>>
>> this does not match anything currently in genesys_devices.c. Just add
>> one entry to the Wolfson array, #define a DAC_xxxx to 7 in genesys_low.h
>> and put that in your Genesys_Model.
>>
>> The gain/offset setting should be good for led calibration and will be
>> replaced by gain/offset calibration.
>>
>> After that, get a scan of the calibration area(the area under the
>> housing at the parking position). For this, put 0 into the x_offset and
>> y_offset in your Genesys_Model. If this turns out to be similar to the
>> calibration area of the lide 50, led/offset/gain-calibration should work
>> with only minor changes.
>>
>> Regards,
>>   Pierre
>>
>>
> 
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