[sane-devel] Backend for plustek Opticbook 3600

[Chris Berry]

Thanks for the quick reply stef, hope you had a good christmas/new year :).

I have made changes to the GPIO settings as appropriate (i.e. matched 
the settings to what I believe is correct from register writes) but I 
could only find values for 0x6b, 0x6d, 0x6e and 0x6f. I couldn't find a 
write to 0x6c so I assumed that to be 0x00 and also I am unsure in which 
file the 0x6b register is set. Is 0x6b set in genesys_devices.c? If so 
which section?

Another concern is that in the logs there are no URB's of the form:

control  0x40 0x0c 0x89 0x00 len  (Output enable)
control  0xc0 0x0c 0x8a 0x00 len (read)
control  0x40 0x0c 0x8b 0x00 len (write)

I checked these after running the initial perl scripts and before the 
awk scripts you forwarded to me. Is it maybe possible that the control 
URBs for this have happened at a time that hasn't been caught by the 
logs or is it more likely that there is a different value being used as 
opposed to 0x89, 0x8a and 0x8b?

Would incorrect GPO affect the light being on and off? I know for sure 
that the value for 0x6b from the logs is different to the one set by the 
genesys driver at the moment so I think maybe correcting this could be a 
big break through for this project :)

Chris

stef wrote:
> Le jeudi 7 janvier 2010 15:14:20 Chris Berry, vous avez écrit :
>   
>> Hi Stef,
>>
>> I have updates on this project at
>> http://sites.google.com/site/bez625/updates-1/update070110 with some
>> attachments. I am still struggling to work out why the scan lamp is off
>> during scanning.
>>
>> My thoughts are that maybe the genesys backend is saying the lamp sleep
>> mode if on before the scan as opposed to off. The log files seem to
>> support this with the register values being set but any advice you could
>> offer on where i should go from here would be appreciated.
>>
>> Thanks
>>
>> Chris
>>
>>     
>
> 	Hello,
>
> 	have you made changes related to GPIO ? They often change meaning from a 
> scanner to another. Sometimes you won't get any data until they are set up 
> correctly. 
> 	Locate writes to registers 6c/6d and 6b for values and 6e/6f for mask in the 
> USB logs you have. You'll see quite a few places where we test for the model-
>   
>> gpo_type and write to GPIO registers. Try to adapt these to match what you'll 
>>     
> see in logs.
>
> Regards,
> 	Stef
>
>