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author | julian <julian@FreeBSD.org> | 1995-09-08 03:10:51 +0000 |
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committer | julian <julian@FreeBSD.org> | 1995-09-08 03:10:51 +0000 |
commit | 23a00f08e3fe32447d2415068dda46462ae16f0d (patch) | |
tree | 666c8a81b5a0c7caeae2f577b011a65d424f08aa /share/man | |
parent | 0704e6325a24ef62463139c9ae535757d055bc37 (diff) | |
download | FreeBSD-src-23a00f08e3fe32447d2415068dda46462ae16f0d.zip FreeBSD-src-23a00f08e3fe32447d2415068dda46462ae16f0d.tar.gz |
Submitted by: -Luigi Rizzo (luigi@iet.unipi.it)
Obtained from: Luigi Rizzo and Gunther Schadow
man page for the asc scanner driver
Diffstat (limited to 'share/man')
-rw-r--r-- | share/man/man4/man4.i386/Makefile | 7 | ||||
-rw-r--r-- | share/man/man4/man4.i386/asc.4 | 179 |
2 files changed, 183 insertions, 3 deletions
diff --git a/share/man/man4/man4.i386/Makefile b/share/man/man4/man4.i386/Makefile index 6a82292..861c537 100644 --- a/share/man/man4/man4.i386/Makefile +++ b/share/man/man4/man4.i386/Makefile @@ -1,13 +1,14 @@ # @(#)Makefile 0.1 (RWGrimes) 3/25/93 -MAN4= aha.4 ahb.4 ahc.4 apm.4 bt.4 cx.4 ed.4 fdc.4 fe.4 ie.4 is.4 joy.4 \ - keyboard.4 lpt.4 matcd.4 mcd.4 mem.4 meteor.4 mse.4 npx.4 pcvt.4 \ - screen.4 sio.4 spkr.4 tw.4 uha.4 wd.4 +MAN4= aha.4 ahb.4 ahc.4 apm.4 asc.4 bt.4 cx.4 ed.4 fdc.4 fe.4 ie.4 \ + is.4 joy.4 keyboard.4 lpt.4 matcd.4 mcd.4 mem.4 meteor.4 \ + mse.4 npx.4 pcvt.4 screen.4 sio.4 spkr.4 tw.4 uha.4 wd.4 MLINKS= aha.4 ../aha.4 MLINKS+= ahb.4 ../ahb.4 MLINKS+= ahc.4 ../ahc.4 MLINKS+= apm.4 ../apm.4 +MLINKS+= asc.4 ../asc.4 MLINKS+= bt.4 ../bt.4 MLINKS+= cx.4 ../cx.4 MLINKS+= ed.4 ../ed.4 diff --git a/share/man/man4/man4.i386/asc.4 b/share/man/man4/man4.i386/asc.4 new file mode 100644 index 0000000..fc187f3 --- /dev/null +++ b/share/man/man4/man4.i386/asc.4 @@ -0,0 +1,179 @@ +.\" asc(4) - manual page for the scanner device driver `asc' +.\" +.\" +.\" Copyright (c) 1995 Gunther Schadow, Luigi Rizzo. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgements: +.\" This product includes software developed by Gunther Schadow. +.\" This product includes software developed by Luigi Rizzo. +.\" 4. The name of the author may not be used to endorse or promote products +.\" derived from this software without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR +.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, +.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF +.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +.TH ASC 4 "January 6, 1995" FreeBSD "FreeBSD Programmer's Manual" +.SH NAME +\fBasc\fP - a device driver for a handy scanner +.SH SYNOPSIS +.TP +\fB#include <machine/asc_ioctl.h>\fP +.TP +\fBMinor number bits:\fP \fIuu d g p ...\fP +\fIuu\fP - unit asc0 .. asc3 +\fI d\fP - selects logging of \fIdebug\fP messages +\fI g\fP - selects \fIbitmap\fP vs. \fIgraymap\fP output +\fI p\fP - selects \fIraw\fP vs. portable \fIpnm\fP output +.TP +\fBdd if=/dev/asc0 of=rawfile bs=(width/8) count=(height) +.TP +\fBcat /dev/asc0p > pbmfile\fP +.PB +.SH DESCRIPTION +The \fBasc\fP character device driver currently handles the +GI1904-based hand scanner (e.g. Trust Amiscan Grey). +It uses DMA and interrupts. Input data from the scanner are +buffered, up to 50 scanlines are buffered in the driver. +.PP +The device can operate at four different \fIresolutions\fP: 100, 200, +300 and 400dpi. It produces a simple bitmap with the most significant bit +at the left side. The driver can optionally output the famous and +likely simple portable bitmap file format pbm(5) by Jef +Poskanzer. Thus the scans can easily processed by any graphic package +around (xpaint, xv, xli only to name some of them ...). +.PP +The \fIwidth\fP of the output bitmap is fixed as given by the +resolution value. However, the \fIheight\fP of the bitmap must be +supplied in \fIpnm\fP mode since the driver must know at what time the +'end-of-file' shall be reached. The default is to produce a +square image, i.e. \fIheight=width\fP. With this feature you are able to +directly copy the scanner output into a pbm file whith cat(1). Of +course you can obtain a similar effect by using dd(1) with the driver +in \fIraw\fP mode. +.PP +The \fIgraymap\fP output mode is not yet implemented into the driver. +It is even questionable if external programs would not do this job +better thereby not counting to the size of the kernel. Even though, I +do not know of tools which produce a graymap from a halftone bitmap. +.SH IOCTL REQUESTS +The ioctl requests that are served by \fBasc\fP are listed below. +There is a utility, called sasc(1), that provides access to these +requests from within shell. +.TP +ASC_GRES int +Get current resolution in dots per inch (dpi). +.TP +ASC_GWIDTH int +Get current width of the bitmap in pixels. +.TP +ASC_SHEIGHT int +Set the \fIheight\fP of the bitmap in \fIpnm\fP mode. This is actually +a limit on the amount of lines scannable after the first read +operation. When the limit is reached read will return 0. However, the +device is turned off only when a close is performed (either +explicitely or implicitely on exit of the calling process). +.TP +ASC_GHEIGHT int +Get the current height of the bitmap. +.TP +ASC_SBLEN int +Set the length of the buffer used internally to do the DMA transfer. +The buffer length is supplied in lines of the bitmap. Since the buffer +size limit is (currently) 0x3000 bytes the maximum number of lines +allowed will vary with the width of each line. This upper limit is +checked before it overwrites the current value and pases an ENOMEM in +the \fBerrno\fP variable. However, since the bitmap width can change +after a buffer length was selected a read request may fail with ENOMEM +if the buffer length turns out too high. It is generally wise to +choose long buffers rather than go save in order to obtain better +output. +.TP +ASC_GBLEN int +Get the current buffer length in lines. +.TP +ASC_SBTIME int +Set the timeout for the completion of reading one buffer. Since a +handy scanner is a human/computer interface timeout values are usually +higher than those of a flat scanner. Default is 15 seconds. After +timeout is reached the read operation will fail with EBUSY. Note that +the timeout timer starts anew for each buffer to be read and thus does +not cause you to scan faster for longer images. BLEN/BTIME is similar +as MIN/TIME in termios(4). +.TP +ASC_GBTIME int +Get the current buffer timeout. +.PP +All ioctl requests that modify a parameter except ASC_SBTIME do not +have an effect on an ongoing scan process, i.e. after the first read +request that follows open. You must close the device and open it again +for the new selections to take effect. Consequently, the selections +are not reset when you close or open the device. +.PP +Similarily, requests that read a value do not report the value that is +used for the ongoing scan process. The values needed during the scan +process are saved when it starts and thus are not accessed by ioctl +requests. +.PP +The BTIME value does, however, have an immediate effect on the ongoing +scan. Thus the timeout can for example be set to long until the user +starts scanning. It can then be set to a short amount to react +(nearly) immediately when the user stops. Note that the user should be +left time to at least fill one buffer without having to haste. +.PP +Note that the \fIpbm\fP versus \fIraw\fP mode selection is done by the +minor number not by ioctl requests. In \fIraw\fP mode the selected +height of the bitmap will have no effect. +.SH FILES +.TP 15 +.BI /dev/asc0 +device node for \fIraw\fP output, has minor number 0. +.TP +.BI /dev/asc0d +device node for \fIraw\fP output emiting \fIdebug\fP messages if the +ASCDEBUG option was given at compile time, has minor number 32. +.TP +.BI /dev/asc0p +device node for output in \fIpbm\fP file format, has minor number 8. +.TP +.BI /dev/asc0pd +device node for \fIpbm\fP and \fIdebug\fP mode, has minor number 40. +.PB +.SH DIAGNOSTICS +.TP +\fBASCDEBUG\fP +When you define this name as an `option' in the kernel configuration +you can get debug output if you access the driver with a minor number +whose debug bit (i.e. bit 5 out of 7) is set. +.SH SEE ALSO +.nh +open(2), +ioctl(2), +intro(2), +read(2), +close(2), +cat(1), +dd(1), +pbm(5), +pnm(1), +termios(4). +.hy +.SH BUGS +Ioctl support is not working yet. +.SH AUTHOR +Luigi Rizzo <luigi.rizzo@iet.unipi.it> |