126 lines
3.8 KiB
C
126 lines
3.8 KiB
C
/*
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From: faith@cs.unc.edu (Rik Faith)
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Subject: User mode keyboard rate changer
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Date: 27 Apr 92 13:44:26 GMT
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I put together this program, called kbdrate.c, which will reset the keyboard
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repeat rate and delay in user mode. The program must have read/write
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access to /dev/port, so if /dev/port is only read/writeable by group port,
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then kbdrate must run setgid to group port (for example).
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The "rate" is the rate in characters per second
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The "delay" is the amount of time the key must remain depressed before it
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will start to repeat.
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Usage examples:
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kbdrate set rate to IBM default (10.9 cps, 250mS delay)
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kbdrate -r 30.0 set rate to 30 cps and delay to 250mS
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kbdrate -r 20.0 -s set rate to 20 cps (delay 250mS) -- don't print message
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kbdrate -r 0 -d 0 set rate to 2.0 cps and delay to 250 mS
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I find it useful to put kbdrate in my /etc/rc file so that the keyboard
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rate is set to something that I find comfortable at boot time. This sure
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beats rebuilding the kernel!
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*/
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/********************** CUT HERE *****************************/
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/* kbdrate.c -- Set keyboard typematic rate (and delay)
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* Created: Thu Apr 23 12:24:30 1992
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* Revised: Mon Apr 27 09:38:45 1992 by faith
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* Author: Rickard E. Faith, faith@cs.unc.edu
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* Copyright 1992 Rickard E. Faith. Distributed under the GPL.
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* This program comes with ABSOLUTELY NO WARRANTY.
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* Usage: kbdrate [-r rate] [-d delay] [-s]
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* Rate can range from 2.0 to 30.0 (units are characters per second)
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* Delay can range from 250 to 1000 (units are milliseconds)
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* -s suppressed message
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* Compiles under gcc 2.1 for Linux (tested with the pre-0.96 kernel)
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/file.h>
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static int valid_rates[] = { 300, 267, 240, 218, 200, 185, 171, 160, 150,
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133, 120, 109, 100, 92, 80, 80, 75, 67,
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60, 55, 50, 46, 43, 40, 37, 33, 30, 27,
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25, 23, 21, 20 };
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#define RATE_COUNT (sizeof( valid_rates ) / sizeof( int ))
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static int valid_delays[] = { 250, 500, 750, 1000 };
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#define DELAY_COUNT (sizeof( valid_delays ) / sizeof( int ))
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void main( int argc, char **argv )
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{
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double rate = 10.9; /* Default rate */
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int delay = 250; /* Default delay */
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int value = 0x7f; /* Maximum delay with slowest rate */
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/* DO NOT CHANGE this value */
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int silent = 0;
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int fd;
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char data;
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int c;
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int i;
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extern char *optarg;
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extern int optind;
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while ( (c = getopt( argc, argv, "r:d:s" )) != EOF )
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switch (c) {
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case 'r':
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rate = atof( optarg );
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break;
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case 'd':
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delay = atoi( optarg );
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break;
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case 's':
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silent = 1;
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break;
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}
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for (i = 0; i < RATE_COUNT; i++)
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if (rate * 10 >= valid_rates[i]) {
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value &= 0x60;
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value |= i;
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break;
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}
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for (i = 0; i < DELAY_COUNT; i++)
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if (delay <= valid_delays[i]) {
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value &= 0x1f;
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value |= i << 5;
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break;
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}
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if ( (fd = open( "/dev/port", O_RDWR )) < 0) {
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perror( "Cannot open /dev/port" );
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exit( 1 );
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}
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do {
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lseek( fd, 0x64, 0 );
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read( fd, &data, 1 );
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} while ((data & 2) == 2 ); /* wait */
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lseek( fd, 0x60, 0 );
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data = 0xf3; /* set typematic rate */
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write( fd, &data, 1 );
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do {
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lseek( fd, 0x64, 0 );
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read( fd, &data, 1 );
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} while ((data & 2) == 2 ); /* wait */
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lseek( fd, 0x60, 0 );
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write( fd, &value, 1 );
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close( fd );
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if (!silent) printf( "Typematic Rate set to %.1f cps (delay = %d mS)\n",
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valid_rates[value & 0x1f] / 10.0,
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valid_delays[ (value & 0x60) >> 5 ] );
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}
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