/* $Id: drv_generic_parport.h 840 2007-09-09 12:17:42Z michael $
 * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/drv_generic_parport.h $
 *
 * generic driver helper for parallel port displays
 *
 * Copyright (C) 1999, 2000 Michael Reinelt <michael@reinelt.co.at>
 * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
 *
 * This file is part of LCD4Linux.
 *
 * LCD4Linux is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * LCD4Linux is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

/* 
 *
 * exported fuctions:
 *
 * int drv_generic_parport_open (void)
 *   reads 'Port' entry from config and opens
 *   the parallel port
 *   returns 0 if ok, -1 on failure
 *
 * int drv_generic_parport_close (void)
 *   closes parallel port
 *   returns 0 if ok, -1 on failure
 *
 * unsigned char drv_generic_parport_wire_ctrl (char *name, char *deflt)
 *   reads wiring for one control signal from config
 *   returns DRV_GENERIC_PARPORT_CONTROL_* or 255 on error
 *
 * unsigned char drv_generic_parport_hardwire_ctrl (char *name)
 *   returns hardwiring for one control signal
 *   same as above, but does not read from config,
 *   but checks the config and emits a warning that the config
 *   entry will be ignored
 *   returns DRV_GENERIC_PARPORT_CONTROL_* or 255 on error
 *
 * unsigned char drv_generic_parport_wire_status (char *name, char *deflt)
 *   reads wiring for one status signal from config
 *   returns DRV_GENERIC_PARPORT_STATUS_* or 255 on error
 *
 * unsigned char drv_generic_parport_wire_data (char *name, char *deflt)
 *   reads wiring for one data signal from config
 *   returns 1<<bitpos or 255 on error
 *
 * void drv_generic_parport_direction (int direction)
 *   0 - write to parport
 *   1 - read from parport
 *
 * unsigned char drv_generic_parport_status (void)
 *   reads control lines
 *
 * void drv_generic_parport_control (unsigned char mask, unsigned char value)
 *   frobs control line and takes care of inverted signals
 *
 * void drv_generic_parport_toggle (unsigned char bit, int level, int delay)
 *   toggles the line <bit> to <level> for <delay> nanoseconds
 *
 * void drv_generic_parport_data (unsigned char value)
 *   put data bits on DB1..DB8
 *
 * unsigned char drv_generic_parport_read (void)
 *   reads a byte from the parallel port
 *
 * void drv_generic_parport_debug(void)
 *   prints status of control lines
 *
 */

#ifndef _DRV_GENERIC_PARPORT_H_
#define _DRV_GENERIC_PARPORT_H_

int drv_generic_parport_open(const char *section, const char *driver);
int drv_generic_parport_close(void);
unsigned char drv_generic_parport_wire_ctrl(const char *name, const char *deflt);
unsigned char drv_generic_parport_hardwire_ctrl(const char *name, const char *deflt);
unsigned char drv_generic_parport_wire_status(const char *name, const char *deflt);
unsigned char drv_generic_parport_wire_data(const char *name, const char *deflt);
void drv_generic_parport_direction(const int direction);
unsigned char drv_generic_parport_status(void);
void drv_generic_parport_control(const unsigned char mask, const unsigned char value);
void drv_generic_parport_toggle(const unsigned char bit, const int level, const unsigned long delay);
void drv_generic_parport_data(const unsigned char data);
unsigned char drv_generic_parport_read(void);
void drv_generic_parport_debug(void);

#endif
td><a href='/lcd4linux.git/commit/lcd4linux.conf.sample?id=424c378dd92c9ba92ba258689a0358c3cc3010b5&amp;follow=1'>[lcd4linux @ 2005-05-10 13:20:10 by reinelt]</a></td><td>reinelt</td><td>9</td><td><span class='deletions'>-22</span>/<span class='insertions'>+511</span></td></tr>
<tr><td><span title='2005-05-08 04:32:45 +0000'>2005-05-08</span></td><td><a href='/lcd4linux.git/commit/widget_text.h?id=dbf5d92605a9db10e3e3cb154d03a515c5d5c5af&amp;follow=1'>[lcd4linux @ 2005-05-08 04:32:43 by reinelt]</a></td><td>reinelt</td><td>94</td><td><span class='deletions'>-15305</span>/<span class='insertions'>+16121</span></td></tr>
<tr><td><span title='2005-05-06 06:41:53 +0000'>2005-05-06</span></td><td><a href='/lcd4linux.git/commit/python.m4?id=a1c471e9fb7cadb68bb182ab2e9715a0aa092386&amp;follow=1'>[lcd4linux @ 2005-05-06 06:41:53 by reinelt]</a></td><td>reinelt</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2005-05-06 06:37:34 +0000'>2005-05-06</span></td><td><a href='/lcd4linux.git/commit/widget_bar.h?id=4042833f1f9cf91aa6b174daf6bde964df13f776&amp;follow=1'>[lcd4linux @ 2005-05-06 06:37:34 by reinelt]</a></td><td>reinelt</td><td>3</td><td><span class='deletions'>-31</span>/<span class='insertions'>+112</span></td></tr>
<tr><td><span title='2005-05-06 05:40:03 +0000'>2005-05-06</span></td><td><a href='/lcd4linux.git/commit/documentation/xsl/xhtml.xsl?id=68f0bcc303b6ba1ac102ed24d589fe9d64a74f73&amp;follow=1'>[lcd4linux @ 2005-05-06 05:40:02 by reinelt]</a></td><td>reinelt</td><td>20</td><td><span class='deletions'>-2167</span>/<span class='insertions'>+0</span></td></tr>
<tr><td><span title='2005-05-06 05:36:59 +0000'>2005-05-06</span></td><td><a href='/lcd4linux.git/commit/documentation/data/references.xml?id=aba7aa89e9de7b0b4966ca241f7722786a3a6a56&amp;follow=1'>[lcd4linux @ 2005-05-06 05:36:58 by reinelt]</a></td><td>reinelt</td><td>6</td><td><span class='deletions'>-238</span>/<span class='insertions'>+0</span></td></tr>
<tr><td><span title='2005-05-05 08:36:12 +0000'>2005-05-05</span></td><td><a href='/lcd4linux.git/commit/lcd4linux.conf.sample?id=c5d0303bea3b1082b6e7766090dce347a1213bc5&amp;follow=1'>[lcd4linux @ 2005-05-05 08:36:12 by reinelt]</a></td><td>reinelt</td><td>6</td><td><span class='deletions'>-15</span>/<span class='insertions'>+34</span></td></tr>
<tr><td><span title='2005-05-04 07:18:44 +0000'>2005-05-04</span></td><td><a href='/lcd4linux.git/commit/drv_Noritake.c?id=f6453b924e3e06b9f660bdf1d1ae7eba8a1c7924&amp;follow=1'>[lcd4linux @ 2005-05-04 07:18:44 by obconseil]</a></td><td>obconseil</td><td>1</td><td><span class='deletions'>-36</span>/<span class='insertions'>+84</span></td></tr>
<tr><td><span title='2005-05-04 06:13:05 +0000'>2005-05-04</span></td><td><a href='/lcd4linux.git/commit/drv_generic_parport.h?id=af622e47c4595939c26bd8413c94bbe29106148e&amp;follow=1'>[lcd4linux @ 2005-05-04 06:13:05 by reinelt]</a></td><td>reinelt</td><td>2</td><td><span class='deletions'>-12</span>/<span class='insertions'>+77</span></td></tr>
<tr><td><span title='2005-05-04 05:42:38 +0000'>2005-05-04</span></td><td><a href='/lcd4linux.git/commit/drv_Noritake.c?id=0af867f6a5b60f1259792b1222a23b48039e3282&amp;follow=1'>[lcd4linux @ 2005-05-04 05:42:37 by reinelt]</a></td><td>reinelt</td><td>7</td><td><span class='deletions'>-23</span>/<span class='insertions'>+398</span></td></tr>
<tr><td><span title='2005-05-04 05:22:12 +0000'>2005-05-04</span></td><td><a href='/lcd4linux.git/commit/plugin_python.c?id=13238c06a2e3ea8feac96d02690a856b7a2a1d37&amp;follow=1'>[lcd4linux @ 2005-05-04 05:22:12 by reinelt]</a></td><td>reinelt</td><td>1</td><td><span class='deletions'>-28</span>/<span class='insertions'>+31</span></td></tr>
<tr><td><span title='2005-05-03 11:13:24 +0000'>2005-05-03</span></td><td><a href='/lcd4linux.git/commit/plugins.m4?id=854e71168960439ed10d6ac057725dbe42f95929&amp;follow=1'>[lcd4linux @ 2005-05-03 11:13:23 by reinelt]</a></td><td>reinelt</td><td>6</td><td><span class='deletions'>-30</span>/<span class='insertions'>+122</span></td></tr>
<tr><td><span title='2005-05-02 10:29:20 +0000'>2005-05-02</span></td><td><a href='/lcd4linux.git/commit/python.m4?id=0849d874e73b9c456d633bf43f8c219a6be4ec0e&amp;follow=1'>[lcd4linux @ 2005-05-02 10:29:20 by reinelt]</a></td><td>reinelt</td><td>9</td><td><span class='deletions'>-30</span>/<span class='insertions'>+636</span></td></tr>
<tr><td><span title='2005-05-02 05:15:46 +0000'>2005-05-02</span></td><td><a href='/lcd4linux.git/commit/lcd4linux.conf.sample?id=dfcd00a79bf78f14f8699b303b1e8bb4d77d53f0&amp;follow=1'>[lcd4linux @ 2005-05-02 05:15:46 by reinelt]</a></td><td>reinelt</td><td>4</td><td><span class='deletions'>-9</span>/<span class='insertions'>+51</span></td></tr>
<tr><td><span title='2005-04-30 06:02:09 +0000'>2005-04-30</span></td><td><a href='/lcd4linux.git/commit/lcd4linux.conf.sample?id=733a1141da1f25e986ee423d67f5342673102b30&amp;follow=1'>[lcd4linux @ 2005-04-30 06:02:09 by reinelt]</a></td><td>reinelt</td><td>3</td><td><span class='deletions'>-15</span>/<span class='insertions'>+44</span></td></tr>
<tr><td><span title='2005-04-24 05:27:09 +0000'>2005-04-24</span></td><td><a href='/lcd4linux.git/commit/lcd4linux.conf.sample?id=cc9c2bd2432848924d60846a552dac1d0daf3fa6&amp;follow=1'>[lcd4linux @ 2005-04-24 05:27:09 by reinelt]</a></td><td>reinelt</td><td>2</td><td><span class='deletions'>-7</span>/<span class='insertions'>+38</span></td></tr>
<tr><td><span title='2005-04-24 04:41:28 +0000'>2005-04-24</span></td><td><a href='/lcd4linux.git/commit/ChangeLog?id=d0c29c65a8eecfd49ab97af1b85258bdff9185b7&amp;follow=1'>[lcd4linux @ 2005-04-24 04:41:28 by reinelt]</a></td><td>reinelt</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+68</span></td></tr>
<tr><td><span title='2005-04-24 04:33:46 +0000'>2005-04-24</span></td><td><a href='/lcd4linux.git/commit/lcd4linux.conf.sample?id=62c2b871ae20d093190f7a64b1f13661c7a42222&amp;follow=1'>[lcd4linux @ 2005-04-24 04:33:46 by reinelt]</a></td><td>reinelt</td><td>9</td><td><span class='deletions'>-10</span>/<span class='insertions'>+444</span></td></tr>
<tr><td><span title='2005-04-20 05:49:21 +0000'>2005-04-20</span></td><td><a href='/lcd4linux.git/commit/drv_SimpleLCD.c?id=024363f46c5257d74e90b4bd737772b70049f4da&amp;follow=1'>[lcd4linux @ 2005-04-20 05:49:21 by reinelt]</a></td><td>reinelt</td><td>1</td><td><span class='deletions'>-44</span>/<span class='insertions'>+125</span></td></tr>
<tr><td><span title='2005-04-09 07:36:42 +0000'>2005-04-09</span></td><td><a href='/lcd4linux.git/commit/drv_LCDLinux.h?id=1f139b5afd67194f363bb4f92b2300c2deed629e&amp;follow=1'>[lcd4linux @ 2005-04-09 07:36:42 by reinelt]</a></td><td>reinelt</td><td>2</td><td><span class='deletions'>-17</span>/<span class='insertions'>+99</span></td></tr>
<tr><td><span title='2005-04-05 06:57:41 +0000'>2005-04-05</span></td><td><a href='/lcd4linux.git/commit/plugins.m4?id=3b55000a09e59b2ee620e01b8dd4e383fe4b43dc&amp;follow=1'>[lcd4linux @ 2005-04-05 06:57:39 by reinelt]</a></td><td>reinelt</td><td>3</td><td><span class='deletions'>-34</span>/<span class='insertions'>+34</span></td></tr>
<tr><td><span title='2005-04-05 05:12:57 +0000'>2005-04-05</span></td><td><a href='/lcd4linux.git/commit/lcd4linux.conf.sample?id=8621c074afa688d5019818bdf44c14cdf53f1aa6&amp;follow=1'>[lcd4linux @ 2005-04-05 05:12:48 by reinelt]</a></td><td>reinelt</td><td>4</td><td><span class='deletions'>-407</span>/<span class='insertions'>+33</span></td></tr>
<tr><td><span title='2005-04-05 04:46:06 +0000'>2005-04-05</span></td><td><a href='/lcd4linux.git/commit/plugin_math.c?id=add33a2a7f689611d2b76029a0d5597281f684bc&amp;follow=1'>[lcd4linux @ 2005-04-05 04:46:06 by reinelt]</a></td><td>reinelt</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+20</span></td></tr>
<tr><td><span title='2005-04-04 20:11:14 +0000'>2005-04-04</span></td><td><a href='/lcd4linux.git/commit/plugin_imon.c?id=c49672b6b89a02dd5ed9c5203b534f8bd6e07509&amp;follow=1'>[lcd4linux @ 2005-04-04 20:11:14 by nicowallmeier]</a></td><td>nicowallmeier</td><td>1</td><td><span class='deletions'>-2</span>/<span class='insertions'>+6</span></td></tr>
<tr><td><span title='2005-04-03 07:07:51 +0000'>2005-04-03</span></td><td><a href='/lcd4linux.git/commit/plugins.m4?id=118d85d597ffa77ca2d53b01c1dc5295f11c5f2c&amp;follow=1'>[lcd4linux @ 2005-04-03 07:07:43 by reinelt]</a></td><td>reinelt</td><td>8</td><td><span class='deletions'>-9</span>/<span class='insertions'>+152</span></td></tr>
<tr><td><span title='2005-04-02 05:28:58 +0000'>2005-04-02</span></td><td><a href='/lcd4linux.git/commit/drv_USBLCD.c?id=a6a03faa860233ec2b2d13abbb14bd9661a61222&amp;follow=1'>[lcd4linux @ 2005-04-02 05:28:58 by reinelt]</a></td><td>reinelt</td><td>3</td><td><span class='deletions'>-19</span>/<span class='insertions'>+27</span></td></tr>
<tr><td><span title='2005-04-01 05:16:04 +0000'>2005-04-01</span></td><td><a href='/lcd4linux.git/commit/plugin_pop3.c?id=db07da0b72602a70c23ed10e4bface19ed029bc8&amp;follow=1'>[lcd4linux @ 2005-04-01 05:16:04 by reinelt]</a></td><td>reinelt</td><td>5</td><td><span class='deletions'>-584</span>/<span class='insertions'>+694</span></td></tr>
<tr><td><span title='2005-03-30 04:57:50 +0000'>2005-03-30</span></td><td><a href='/lcd4linux.git/commit/plugin_cfg.c?id=f650bc134e5e1db71498bd4504a98331a99993d2&amp;follow=1'>[lcd4linux @ 2005-03-30 04:57:50 by reinelt]</a></td><td>reinelt</td><td>3</td><td><span class='deletions'>-23</span>/<span class='insertions'>+67</span></td></tr>
<tr><td><span title='2005-03-28 22:29:23 +0000'>2005-03-28</span></td><td><a href='/lcd4linux.git/commit/drv_HD44780.c?id=5985c204a32bd6b9f69646dbe6110ffa0c55651b&amp;follow=1'>[lcd4linux @ 2005-03-28 22:29:23 by reinelt]</a></td><td>reinelt</td><td>1</td><td><span class='deletions'>-250</span>/<span class='insertions'>+346</span></td></tr>
<tr><td><span title='2005-03-28 19:39:23 +0000'>2005-03-28</span></td><td><a href='/lcd4linux.git/commit/drv_generic_i2c.h?id=36b9cd6acd0607f0b9ae8b58ef74a12786faf938&amp;follow=1'>[lcd4linux @ 2005-03-28 19:39:14 by reinelt]</a></td><td>reinelt</td><td>9</td><td><span class='deletions'>-256</span>/<span class='insertions'>+1147</span></td></tr>
<tr><td><span title='2005-03-25 15:44:43 +0000'>2005-03-25</span></td><td><a href='/lcd4linux.git/commit/drv_HD44780.c?id=b6dd247d8ae45694367c16be7fae65f084a18961&amp;follow=1'>[lcd4linux @ 2005-03-25 15:44:43 by reinelt]</a></td><td>reinelt</td><td>1</td><td><span class='deletions'>-2</span>/<span class='insertions'>+5</span></td></tr>
<tr><td><span title='2005-03-23 12:23:35 +0000'>2005-03-23</span></td><td><a href='/lcd4linux.git/commit/drv_Crystalfontz.c?id=93f4190b076c528589fe1f32a10b4ce346e999fe&amp;follow=1'>[lcd4linux @ 2005-03-23 12:23:35 by reinelt]</a></td><td>reinelt</td><td>1</td><td><span class='deletions'>-27</span>/<span class='insertions'>+32</span></td></tr>
<tr><td><span title='2005-02-24 07:07:55 +0000'>2005-02-24</span></td><td><a href='/lcd4linux.git/commit/ChangeLog?id=ff0c5aa7ccb600afb68af5f4c865ab2a3c91630a&amp;follow=1'>[lcd4linux @ 2005-02-24 07:07:55 by reinelt]</a></td><td>reinelt</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+53</span></td></tr>
<tr><td><span title='2005-02-24 07:06:48 +0000'>2005-02-24</span></td><td><a href='/lcd4linux.git/commit/lcd4linux.conf.sample?id=b8d041d37641f40b4a093fb0e712f6dbd12f662b&amp;follow=1'>[lcd4linux @ 2005-02-24 07:06:45 by reinelt]</a></td><td>reinelt</td><td>11</td><td><span class='deletions'>-28</span>/<span class='insertions'>+347</span></td></tr>
<tr><td><span title='2005-02-24 06:51:40 +0000'>2005-02-24</span></td><td><a href='/lcd4linux.git/commit/drv_LCDLinux.c?id=865a7df05b49209d0551a4df87fceba434d3cb2c&amp;follow=1'>[lcd4linux @ 2005-02-24 06:51:40 by reinelt]</a></td><td>reinelt</td><td>1</td><td><span class='deletions'>-4</span>/<span class='insertions'>+5</span></td></tr>
<tr><td><span title='2005-01-30 06:43:22 +0000'>2005-01-30</span></td><td><a href='/lcd4linux.git/commit/lcd4linux.conf.sample?id=a086667aad27e4a615bf5f521a516ef533dd9618&amp;follow=1'>[lcd4linux @ 2005-01-30 06:43:22 by reinelt]</a></td><td>reinelt</td><td>4</td><td><span class='deletions'>-69</span>/<span class='insertions'>+95</span></td></tr>
<tr><td><span title='2005-01-29 09:30:56 +0000'>2005-01-29</span></td><td><a href='/lcd4linux.git/commit/drv_HD44780.c?id=575f363d88d793449679641941bd42f5b50d3503&amp;follow=1'>[lcd4linux @ 2005-01-29 09:30:56 by reinelt]</a></td><td>reinelt</td><td>1</td><td><span class='deletions'>-8</span>/<span class='insertions'>+11</span></td></tr>
<tr><td><span title='2005-01-22 22:57:57 +0000'>2005-01-22</span></td><td><a href='/lcd4linux.git/commit/lcd4linux.conf.sample?id=620568e08f7e1e7be5d3be85643f821cdcca897b&amp;follow=1'>[lcd4linux @ 2005-01-22 22:57:57 by reinelt]</a></td><td>reinelt</td><td>9</td><td><span class='deletions'>-47</span>/<span class='insertions'>+382</span></td></tr>
<tr><td><span title='2005-01-22 12:44:41 +0000'>2005-01-22</span></td><td><a href='/lcd4linux.git/commit/drv_MatrixOrbital.c?id=4b6f7fb1f11af97b369feb39aa4c4ac16252045a&amp;follow=1'>[lcd4linux @ 2005-01-22 12:44:41 by reinelt]</a></td><td>reinelt</td><td>1</td><td><span class='deletions'>-3</span>/<span class='insertions'>+6</span></td></tr>
<tr><td><span title='2005-01-18 06:30:24 +0000'>2005-01-18</span></td><td><a href='/lcd4linux.git/commit/widget_text.h?id=ae6d2a0a265f41e9c9773d61dcf16da3653b674e&amp;follow=1'>[lcd4linux @ 2005-01-18 06:30:21 by reinelt]</a></td><td>reinelt</td><td>89</td><td><span class='deletions'>-261</span>/<span class='insertions'>+603</span></td></tr>
<tr><td><span title='2005-01-17 06:38:48 +0000'>2005-01-17</span></td><td><a href='/lcd4linux.git/commit/drv_HD44780.c?id=1f29316bdf4df65aed92770d0c440e0984ef1086&amp;follow=1'>[lcd4linux @ 2005-01-17 06:38:48 by reinelt]</a></td><td>reinelt</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+6</span></td></tr>
<tr><td><span title='2005-01-17 06:29:25 +0000'>2005-01-17</span></td><td><a href='/lcd4linux.git/commit/lcd4linux.conf.sample?id=f25e145be4d7ebe0c3b6803acf8521d5b2d8b1a1&amp;follow=1'>[lcd4linux @ 2005-01-17 06:29:24 by reinelt]</a></td><td>reinelt</td><td>3</td><td><span class='deletions'>-33</span>/<span class='insertions'>+85</span></td></tr>