[sane-devel] Backend for plustek Opticbook 3600

[stef]

Le lundi 22 février 2010 02:09:14 Chris Berry, vous avez écrit :
> Hey Stef,
> 
> I think I have isolated the gamma tables from the logs but there is a
> significant difference; the gamma tables all seem to be sent at once to
> the scanner. Regs 0x5b and 0x5c are both set to 0x00 and 1536 bytes are
> sent to the scanner. I have attached the log file appearances of the
> gamma tables to this email, there are five occurrences in my log file so
> all sets are here. I have split them up myself into three blocks but in
> the original snoop they all appear together.
> 
> Will I need to modify the code base to account for all the gamma tables
> being sent at once?
> 
> Thanks
> 
> Chris
> 
	Hello,

	no need to modify the backend. Both way of writing data give the same result. 
Since all 3 curves are the same, you can pick one (from the '1' write, others 
are simple ramps) and turn it into a list of 256 16 bits words. You can then 
import it in a spreadsheet. 
	You may use this kind of awk script on a 1 line file with all the hex values:
{
	for(i=1;i<NF;i+=2)
	{
		print strtonum($i)+256*strtonum($(i+1))
	}
}

Regards,
	Stef