On Wed, 20 Nov 2002 09:29:22 +0800 "Dan" <dan_fa...@hotmail.com> wrote:
> Now I am trying to develop driver for Gt6801 chip scanner. But I have > not Gt6801 chip specification, So i don't know how backend communicate > with scanner. Who has documents about this? One such driver already exists - the gt68xx backend (already in the SANE CVS); its home page is at http://www.meier-geinitz.de/sane/gt68xx/ . The home page has a reference to some chip documentation, but the GT6801 "document" is useless. The GT6816 file has a register-level description of the chip, but there is no protocol description - the protocol is handled by the firmware, which is dowloaded from the computer (there should be a firmware file with the Windows driver). Looks like most GT6801-based and GT6816-based scanners use similar command sets (probably because the firmware is based on the same code from Grandtech) - because of this, many different scanners are supported by the same backend. However, it is possible that some scanners may have a completely different command set - it all depends on the firmware. What scanner do you want to control (give the exact manufacturer and model name)? Did you try the existing drivers?
