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This is a HP SCSI scanner driver which uses the FreeBSD 'pt' (Processor
Type) driver. It has been tested on the HP ScanJet 3C and 4A, and was
written for the HP ScanJet IIcx, so I suspect it will work with all newer
HP scanners without modifications.
To install the driver you must add a line to your kernel config file
like the following:
# HP Scanner
device pt0 at scbus?
Re-configure, build, and install the new kernel. On bootup you should
seem something similar to this which shows your scanner is attached:
(ncr0:5:0): "HP C2520A 3503" type 3 fixed SCSI 2
pt0(ncr0:5:0): Processor
Next, you'll want to make a link from /dev/pt0 to /dev/scanner for the
driver software.
# cd /dev
# ln -s pto0 scanner
At this point, you should be able to run the scanner program and see
results.
- Nate
Original README follows:
---------------------------
This software is copyright Richard Tobin 1994. It may be freely
redistributed provided the copyright notices are not removed.
You can ftp this code from macbeth.cogsci.ed.ac.uk.
This is (a very early version of) a SCSI driver for the HP ScanJet range
of scanners and a corresponding graphical user interface.
The HP scanners (or at least some of them) are SCSI devices, but do
not implement the SCSI scanner interface. Instead they act as SCSI
processor devices. They use the SCSI send and receive commands to
transfer (hard as it is to believe) escape sequences.
The file scsi.c implements the SCSI send and receive commands in user
mode, using the *BSD "uk" (unknown device) driver. The uk driver is
somewhat flaky, rarely returning errors even if the device is switched
off. Error detection is therefore likely to be minimal.
The file scanner.c provides a thin layer on top of scsi.c, and might
decode error returns if there were any.
The file scl.c implements many of the HP SCL (Scanner Control
Language) commands. This involves generating and parsing lots of
escape sequences.
The file gui.c provides a simple X interface to the scanner. It
allows you to preview the whole scan area, zoom in on the bit you're
interested in, and scan it to a file. So far it can only scan 24-bit
colour, preview on a colour display, and produce ppm files.
All of this has been hacked up in a hurry, so it's pretty minimal. It
has been tried only under FreeBSD 1.1 with a ScanJet IIcx connected to
an Adaptec 1542CF. I don't have much time to spend on it, so don't
expect rapid improvements. Please send bug-reports and improvements
to R.Tobin@ed.ac.uk.
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