1996-01-12 20:58:39 +00:00
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This is a HP SCSI scanner driver which uses the FreeBSD 'pt' (Processor
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1996-01-13 19:01:10 +00:00
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Type) driver. It has been tested on the HP ScanJet 3C and 4A, and was
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written for the HP ScanJet IIcx, so I suspect it will work with all newer
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HP scanners without modifications.
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1996-01-12 20:58:39 +00:00
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To install the driver you must add a line to your kernel config file
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like the following:
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# HP Scanner
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device pt0 at scbus?
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Re-configure, build, and install the new kernel. On bootup you should
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seem something similar to this which shows your scanner is attached:
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(ncr0:5:0): "HP C2520A 3503" type 3 fixed SCSI 2
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pt0(ncr0:5:0): Processor
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Next, you'll want to make a link from /dev/pt0 to /dev/scanner for the
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driver software.
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# cd /dev
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# ln -s pto0 scanner
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At this point, you should be able to run the scanner program and see
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results.
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- Nate
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Original README follows:
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---------------------------
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This software is copyright Richard Tobin 1994. It may be freely
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redistributed provided the copyright notices are not removed.
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You can ftp this code from macbeth.cogsci.ed.ac.uk.
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This is (a very early version of) a SCSI driver for the HP ScanJet range
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of scanners and a corresponding graphical user interface.
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The HP scanners (or at least some of them) are SCSI devices, but do
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not implement the SCSI scanner interface. Instead they act as SCSI
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processor devices. They use the SCSI send and receive commands to
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transfer (hard as it is to believe) escape sequences.
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The file scsi.c implements the SCSI send and receive commands in user
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mode, using the *BSD "uk" (unknown device) driver. The uk driver is
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somewhat flaky, rarely returning errors even if the device is switched
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off. Error detection is therefore likely to be minimal.
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The file scanner.c provides a thin layer on top of scsi.c, and might
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decode error returns if there were any.
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The file scl.c implements many of the HP SCL (Scanner Control
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Language) commands. This involves generating and parsing lots of
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escape sequences.
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The file gui.c provides a simple X interface to the scanner. It
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allows you to preview the whole scan area, zoom in on the bit you're
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interested in, and scan it to a file. So far it can only scan 24-bit
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colour, preview on a colour display, and produce ppm files.
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All of this has been hacked up in a hurry, so it's pretty minimal. It
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has been tried only under FreeBSD 1.1 with a ScanJet IIcx connected to
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an Adaptec 1542CF. I don't have much time to spend on it, so don't
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expect rapid improvements. Please send bug-reports and improvements
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to R.Tobin@ed.ac.uk.
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