[sane-devel] Does anyone need help writing a backend?

[Stuart Hirons]

Henning,

I have a UMAX 4500 sitting on my desk lying unused since I moved to Red
Hat 4 months ago, can I be of any help here in obtaining any logs or
anything ?


Regards,

Stu Hirons

On Sun, 2003-07-20 at 13:54, Henning Meier-Geinitz wrote:
> Hi,
> 
> On Sat, Jul 19, 2003 at 02:38:36PM +0200, Jaeger, Gerhard wrote:
> > On Samstag, 19. Juli 2003 12:10, Henning Meier-Geinitz wrote:
> > > Hi,
> > >
> > > Usually people ask for help here. In this case it's the other way
> > > round: I may have some spare time during the next few weeks so if
> > > anyone needs help writing a backend I may able to spend some time on
> > > it. 
> > 
> > "Oh, what a lucky man he is...."
> 
> Ha, I just finished my PhD examination so I think it's fair to have
> some free time now :-)
> 
> > >The list of unsupported scanners gets longer and longer so I
> > > thought something should be done :-)
> > >
> > > I prefer working on fairly recent not too expensive USB scanners so I
> > > can get one of these devices for coding.
> > 
> > Well, I think that by supporting the GeneSys Logic stuff we can cover a lot of
> > currently available devices. I know that Oliver Rauch is working on that but I 
> > don't know the status. The only thing I know is, that he's short of time...
> > --> Just a proposal!
> 
> Ok, I'll get a UMAX 4500 and will see what I can do. From my quick
> scan of our lists it looks like these scanners use a GL646 chip:
> 
> Avision iVina FB1600 http://www.meier-geinitz.de/sane/misc/umax-astra-4500.txt
> Genius ColorPage HR7X http://www.meier-geinitz.de/sane/misc/genius-colorpage-hr7x.txt
> Lexmark X83 http://www.meier-geinitz.de/sane/misc/lexmark-x83.txt
> Medion/Tevion MD 5345 http://www.meier-geinitz.de/sane/misc/medion-MD5345.txt
> Medion MD6228
> Medion MD5345 http://www.meier-geinitz.de/sane/misc/medion-md6228.txt
> Plustek OpticPro S12
> Plustek OpticPro S24
> UMAX Astra 4500 http://www.meier-geinitz.de/sane/misc/umax-astra-4500.txt
> 
> And maybe the:
> Canon CanoScan D2400UF (maybe) http://www.meier-geinitz.de/sane/misc/canon-d2400uf.txt
> 
> But the interval for the interrupt endpoint is different here:
> Ivl=10ms. I'm not sure if that matters.
> 
> Any more scanners that use the GL646 chipset?
> 
> > Are there any other chipsets around that may have the same spreading?
> 
> There are some more Genesys chipsets (e.g. the gl841). I have no idea
> how common they are and how different they are from the gl646.
> 
> The Realtek RTS8801B and C chips are also fairly common. E.g. some HP
> and Visioneer scanners use these chips.
> 
> 
> Ok, so I'd like to know everything about the gl646. I know the data
> sheet from http://www.genesyslogic.com/GL646.htm but nothing more.
> Are there already any logs or code (Oliver?)?
> 
> Bye,
>   Henning
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-- 
Stuart Hirons <stuart@beandog.freeserve.co.uk>