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authorpk_richman <pk_richman@3ae390bd-cb1e-0410-b409-cd5a39f66f1f>2005-06-01 11:17:54 +0000
committerpk_richman <pk_richman@3ae390bd-cb1e-0410-b409-cd5a39f66f1f>2005-06-01 11:17:54 +0000
commit1cf84b50b6e91e4deb6f0b8e2e8959d48975ca20 (patch)
tree4b814e5f10ccf92f4beb617dd3dbef9d50763357
parent263c01b05b105a8dec11de036658c11532582611 (diff)
downloadlcd4linux-1cf84b50b6e91e4deb6f0b8e2e8959d48975ca20.tar.gz
[lcd4linux @ 2005-06-01 11:17:54 by pk_richman]
marked unused parameters git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@561 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
Diffstat (limited to '')
-rw-r--r--drv_HD44780.c2997
1 files changed, 1500 insertions, 1497 deletions
diff --git a/drv_HD44780.c b/drv_HD44780.c
index 7f9990a..7377c9e 100644
--- a/drv_HD44780.c
+++ b/drv_HD44780.c
@@ -1,1500 +1,1503 @@
-/* $Id: drv_HD44780.c,v 1.52 2005/05/31 21:28:42 lfcorreia Exp $
- *
- * new style driver for HD44780-based displays
- *
- * Copyright (C) 2003 Michael Reinelt <reinelt@eunet.at>
- * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
- *
- * Support for I2C bus
- * Copyright (C) 2005 Luis Correia <lfcorreia@users.sf.net>
- *
- * Modification for 4-Bit mode
- * Copyright (C) 2003 Martin Hejl (martin@hejl.de)
- *
- * Modification for 2nd controller support
- * Copyright (C) 2003 Jesse Brook Kovach <jkovach@wam.umd.edu>
- *
- * 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.
- *
- *
+/* $Id: drv_HD44780.c,v 1.53 2005/06/01 11:17:54 pk_richman Exp $
+ *
+ * new style driver for HD44780-based displays
+ *
+ * Copyright (C) 2003 Michael Reinelt <reinelt@eunet.at>
+ * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
+ *
+ * Support for I2C bus
+ * Copyright (C) 2005 Luis Correia <lfcorreia@users.sf.net>
+ *
+ * Modification for 4-Bit mode
+ * Copyright (C) 2003 Martin Hejl (martin@hejl.de)
+ *
+ * Modification for 2nd controller support
+ * Copyright (C) 2003 Jesse Brook Kovach <jkovach@wam.umd.edu>
+ *
+ * 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.
+ *
+ *
* $Log: drv_HD44780.c,v $
+ * Revision 1.53 2005/06/01 11:17:54 pk_richman
+ * marked unused parameters
+ *
* Revision 1.52 2005/05/31 21:28:42 lfcorreia
* fix typo
- *
- * Revision 1.50 2005/05/31 20:42:55 lfcorreia
- * new file: lcd4linux_i2c.h
- * avoid the problems detecting the proper I2C kernel include files
- *
- * rearrange all the other autoconf stuff to remove I2C detection
- *
- * new method by Paul Kamphuis to write to the I2C device
- *
- * Revision 1.49 2005/05/08 04:32:44 reinelt
- * CodingStyle added and applied
- *
- * Revision 1.48 2005/05/05 08:36:12 reinelt
- * changed SELECT to SLCTIN
- *
- * Revision 1.47 2005/03/28 22:29:23 reinelt
- * HD44780 multiple displays patch from geronet
- *
- * Revision 1.46 2005/03/28 19:39:23 reinelt
- * HD44780/I2C patch from Luis merged (still does not work for me)
- *
- * Revision 1.45 2005/03/25 15:44:43 reinelt
- * HD44780 Backlight fixed (thanks to geronet)
- *
- * Revision 1.44 2005/01/29 09:30:56 reinelt
- * minor HD44780 cleanups
- *
- * Revision 1.43 2005/01/18 06:30:23 reinelt
- * added (C) to all copyright statements
- *
- * Revision 1.42 2005/01/17 06:38:48 reinelt
- * info about backlight and brightness
- *
- * Revision 1.41 2005/01/17 06:29:24 reinelt
- * added software-controlled backlight support to HD44780
- *
- * Revision 1.40 2004/11/30 05:01:25 reinelt
- * removed compiler warnings for deactivated i2c bus
- *
- * Revision 1.39 2004/10/17 09:24:31 reinelt
- * I2C support for HD44780 displays by Luis (does not work by now)
- *
- * Revision 1.38 2004/09/19 09:31:19 reinelt
- * HD44780 busy flag checking improved: fall back to busy-waiting if too many errors occur
- *
- * Revision 1.37 2004/09/18 15:58:57 reinelt
- * even more HD44780 cleanups, hardwiring for LCM-162
- *
- * Revision 1.36 2004/09/18 10:57:29 reinelt
- * more parport/i2c cleanups
- *
- * Revision 1.35 2004/09/18 09:48:29 reinelt
- * HD44780 cleanup and prepararation for I2C backend
- * LCM-162 submodel framework
- *
- * Revision 1.34 2004/09/18 08:22:59 reinelt
- * drv_generic_parport_status() to read status lines
- *
- * Revision 1.33 2004/08/29 13:03:41 reinelt
- *
- * added RouterBoard driver
- *
- * Revision 1.32 2004/06/26 12:04:59 reinelt
- *
- * uh-oh... the last CVS log message messed up things a lot...
- *
- * Revision 1.31 2004/06/26 09:27:20 reinelt
- *
- * added '-W' to CFLAGS
- * changed all C++ comments to C ones
- * cleaned up a lot of signed/unsigned mistakes
- *
- * Revision 1.30 2004/06/20 10:09:54 reinelt
- *
- * 'const'ified the whole source
- *
- * Revision 1.29 2004/06/06 06:51:59 reinelt
- *
- * do not display end splash screen if quiet=1
- *
- * Revision 1.28 2004/06/05 06:41:39 reinelt
- *
- * chancged splash screen again
- *
- * Revision 1.27 2004/06/05 06:13:11 reinelt
- *
- * splash screen for all text-based display drivers
- *
- * Revision 1.26 2004/06/02 10:09:22 reinelt
- *
- * splash screen for HD44780
- *
- * Revision 1.25 2004/06/02 09:41:19 reinelt
- *
- * prepared support for startup splash screen
- *
- * Revision 1.24 2004/06/01 06:45:29 reinelt
- *
- * some Fixme's processed
- * documented some code
- *
- * Revision 1.23 2004/05/31 05:38:02 reinelt
- *
- * fixed possible bugs with user-defined chars (clear high bits)
- * thanks to Andy Baxter for debugging the MilfordInstruments driver!
- *
- * Revision 1.22 2004/05/27 03:39:47 reinelt
- *
- * changed function naming scheme to plugin::function
- *
- * Revision 1.21 2004/05/26 11:37:36 reinelt
- *
- * Curses driver ported.
- *
- * Revision 1.20 2004/05/22 04:23:49 reinelt
- *
- * removed 16*x fix again (next time think before commit :-)
- *
- * Revision 1.19 2004/05/22 04:21:02 reinelt
- *
- * fix for display RAM layout on 16x4 displays (thanks to toxicated101)
- *
- * Revision 1.18 2004/03/20 07:31:32 reinelt
- * support for HD66712 (which has a different RAM layout)
- * further threading development
- *
- * Revision 1.17 2004/03/19 09:17:46 reinelt
- *
- * removed the extra 'goto' function, row and col are additional parameters
- * of the write() function now.
- *
- * Revision 1.16 2004/03/11 06:39:58 reinelt
- * big patch from Martin:
- * - reuse filehandles
- * - memory leaks fixed
- * - earlier busy-flag checking with HD44780
- * - reuse memory for strings in RESULT and hash
- * - netdev_fast to wavid time-consuming regex
- *
- * Revision 1.15 2004/03/03 03:47:04 reinelt
- * big patch from Martin Hejl:
- * - use qprintf() where appropriate
- * - save CPU cycles on gettimeofday()
- * - add quit() functions to free allocated memory
- * - fixed lots of memory leaks
- *
- * Revision 1.14 2004/03/01 04:29:51 reinelt
- * cfg_number() returns -1 on error, 0 if value not found (but default val used),
- * and 1 if value was used from the configuration.
- * HD44780 driver adopted to new cfg_number()
- * Crystalfontz 631 driver nearly finished
- *
- * Revision 1.13 2004/02/15 21:43:43 reinelt
- * T6963 driver nearly finished
- * framework for graphic displays done
- * i2c_sensors patch from Xavier
- * some more old generation files removed
- *
- * Revision 1.12 2004/02/14 11:56:17 reinelt
- * M50530 driver ported
- * changed lots of 'char' to 'unsigned char'
- *
- * Revision 1.11 2004/02/04 19:10:51 reinelt
- * Crystalfontz driver nearly finished
- *
- * Revision 1.10 2004/02/02 05:22:16 reinelt
- * Brightness fpr Noritake Displays avaliable as a plugin
- *
- * Revision 1.9 2004/02/01 11:51:22 hejl
- * Fixes for busy flag
- *
- * Revision 1.8 2004/02/01 08:05:12 reinelt
- * Crystalfontz 633 extensions (CRC checking and stuff)
- * Models table for HD44780
- * Noritake VFD BVrightness patch from Bill Paxton
- *
- * Revision 1.7 2004/01/30 07:12:35 reinelt
- * HD44780 busy-flag support from Martin Hejl
- * loadavg() uClibc replacement from Martin Heyl
- * round() uClibc replacement from Martin Hejl
- * warning in i2c_sensors fixed
- * [
- *
- * Revision 1.6 2004/01/29 04:40:02 reinelt
- * every .c file includes "config.h" now
- *
- * Revision 1.5 2004/01/23 07:04:17 reinelt
- * icons finished!
- *
- * Revision 1.4 2004/01/23 04:53:48 reinelt
- * icon widget added (not finished yet!)
- *
- * Revision 1.3 2004/01/22 07:57:45 reinelt
- * several bugs fixed where segfaulting on layout>display
- * Crystalfontz driver optimized, 632 display already works
- *
- * Revision 1.2 2004/01/21 06:39:27 reinelt
- * HD44780 missed the "clear display' sequence
- * asc255bug handling added
- * HD44780 tested, works here!
- *
- * Revision 1.1 2004/01/20 15:32:49 reinelt
- * first version of Next Generation HD44780 (untested! but it compiles...)
- * some cleanup in the other drivers
- *
- */
-
-/*
- *
- * exported fuctions:
- *
- * struct DRIVER drv_HD44780
- *
- */
-
-#include "config.h"
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
-#include <unistd.h>
-#include <termios.h>
-#include <fcntl.h>
-#include <sys/time.h>
-#include <sys/ioctl.h>
-
-#include "debug.h"
-#include "cfg.h"
-#include "udelay.h"
-#include "qprintf.h"
-#include "timer.h"
-#include "plugin.h"
-#include "widget.h"
-#include "widget_text.h"
-#include "widget_icon.h"
-#include "widget_bar.h"
-#include "drv.h"
-#include "drv_generic_text.h"
-#include "drv_generic_parport.h"
-
-#ifdef WITH_I2C
-#include "drv_generic_i2c.h"
-#endif
-
-static char Name[] = "HD44780";
-
-static int Bus;
-static int Model;
-static int Capabilities;
-
-
-/* low level communication timings [nanoseconds]
- * as these values differ from spec to spec,
- * we use the worst-case values.
- */
-
-#define T_CYCLE 1000 /* Enable cycle time */
-#define T_PW 450 /* Enable pulse width */
-#define T_AS 60 /* Address setup time */
-#define T_H 40 /* Data hold time */
-#define T_AH 20 /* Address hold time */
-
-
-/* HD44780 execution timings [microseconds]
- * as these values differ from spec to spec,
- * we use the worst-case values.
- */
-
-#define T_INIT1 4100 /* first init sequence: 4.1 msec */
-#define T_INIT2 100 /* second init sequence: 100 usec */
-#define T_EXEC 80 /* normal execution time */
-#define T_WRCG 120 /* CG RAM Write */
-#define T_CLEAR 2250 /* Clear Display */
-
-
-static int Bits = 0;
-static int numControllers = 0;
-static int allControllers = 0;
-static int currController = 0;
-
-/* size of every single controller */
-static int CROWS[4];
-static int CCOLS[4];
-
-static unsigned char SIGNAL_RW;
-static unsigned char SIGNAL_RS;
-static unsigned char SIGNAL_ENABLE;
-static unsigned char SIGNAL_ENABLE2;
-static unsigned char SIGNAL_ENABLE3;
-static unsigned char SIGNAL_ENABLE4;
-static unsigned char SIGNAL_BACKLIGHT;
-static unsigned char SIGNAL_GPO;
-
-/* maximum time to wait for the busy-flag (in usec) */
-#define MAX_BUSYFLAG_WAIT 10000
-
-/* maximum busy flag errors before falling back to busy-waiting */
-#define MAX_BUSYFLAG_ERRORS 20
-
-/* flag for busy-waiting vs. busy flag checking */
-static int UseBusy = 0;
-
-
-/* Fixme: GPO's not yet implemented */
-static int GPOS;
-/* static int GPO=0; */
-
-
-typedef struct {
- int type;
- char *name;
- int capabilities;
-} MODEL;
-
-#define CAP_PARPORT (1<<0)
-#define CAP_I2C (1<<1)
-#define CAP_GPO (1<<2)
-#define CAP_BACKLIGHT (1<<3)
-#define CAP_BRIGHTNESS (1<<4)
-#define CAP_BUSY4BIT (1<<5)
-#define CAP_HD66712 (1<<6)
-#define CAP_LCM162 (1<<7)
-
-#define BUS_PP CAP_PARPORT
-#define BUS_I2C CAP_I2C
-
-
-static MODEL Models[] = {
- {0x01, "generic", CAP_PARPORT | CAP_I2C | CAP_GPO | CAP_BACKLIGHT},
- {0x02, "Noritake", CAP_PARPORT | CAP_I2C | CAP_GPO | CAP_BRIGHTNESS},
- {0x03, "Soekris", CAP_PARPORT | CAP_BUSY4BIT},
- {0x04, "HD66712", CAP_PARPORT | CAP_I2C | CAP_GPO | CAP_BACKLIGHT | CAP_HD66712},
- {0x05, "LCM-162", CAP_PARPORT | CAP_LCM162},
- {0xff, "Unknown", 0}
-};
-
-
-/****************************************/
-/*** generic functions ***/
-/****************************************/
-
-static int (*drv_HD_load) (const char *section);
-static void (*drv_HD_command) (const unsigned char controller, const unsigned char cmd, const int delay);
-static void (*drv_HD_data) (const unsigned char controller, const char *string, const int len, const int delay);
-static void (*drv_HD_stop) (void);
-
-
-
-/****************************************/
-/*** parport dependant functions ***/
-/****************************************/
-
-static void drv_HD_PP_busy(const int controller)
-{
- static unsigned int errors = 0;
-
- unsigned char enable;
- unsigned char data = 0xFF;
- unsigned char busymask;
- unsigned char ctrlmask;
- unsigned int counter;
-
- if (Bits == 8) {
- busymask = 0x80;
- } else {
- /* Since in 4-Bit mode DB0 on the parport is mapped to DB4 on the LCD
- * (and consequently, DB3 on the partport is mapped to DB7 on the LCD)
- * we need to listen for DB3 on the parport to go low
- */
- busymask = 0x08;
- }
-
- ctrlmask = 0x08;
- while (ctrlmask > 0) {
-
- if (controller & ctrlmask) {
-
- enable = 0;
- if (ctrlmask & 0x01)
- enable = SIGNAL_ENABLE;
- else if (ctrlmask & 0x02)
- enable = SIGNAL_ENABLE2;
- else if (ctrlmask & 0x04)
- enable = SIGNAL_ENABLE3;
- else if (ctrlmask & 0x08)
- enable = SIGNAL_ENABLE4;
-
- /* set data-lines to input */
- drv_generic_parport_direction(1);
-
- if (Bits == 8) {
- /* Set RW, clear RS */
- drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, SIGNAL_RW);
- } else {
- drv_generic_parport_data(SIGNAL_RW);
- }
-
- /* Address set-up time */
- ndelay(T_AS);
-
- /* rise ENABLE */
- if (Bits == 8) {
- drv_generic_parport_control(enable, enable);
- } else {
- drv_generic_parport_data(SIGNAL_RW | enable);
- }
-
- counter = 0;
- while (1) {
- /* read the busy flag */
- data = drv_generic_parport_read();
- if ((data & busymask) == 0) {
- errors = 0;
- break;
- }
-
- /* make sure we don't wait forever
- * - but only check after 5 iterations
- * that way, we won't slow down normal mode
- * (where we don't need the timeout anyway)
- */
- counter++;
-
- if (counter >= 5) {
- struct timeval now, end;
-
- if (counter == 5) {
- /* determine the time when the timeout has expired */
- gettimeofday(&end, NULL);
- end.tv_usec += MAX_BUSYFLAG_WAIT;
- while (end.tv_usec > 1000000) {
- end.tv_usec -= 1000000;
- end.tv_sec++;
- }
- }
-
- /* get the current time */
- gettimeofday(&now, NULL);
- if (now.tv_sec == end.tv_sec ? now.tv_usec >= end.tv_usec : now.tv_sec >= end.tv_sec) {
- error("%s: timeout waiting for busy flag on controller %x (%x)", Name, ctrlmask, data);
- if (++errors >= MAX_BUSYFLAG_ERRORS) {
- error("%s: too many busy flag failures, turning off busy flag checking.", Name);
- UseBusy = 0;
- }
- break;
- }
- }
- }
-
- /* RS=low, RW=low, EN=low */
- if (Bits == 8) {
- /* Lower EN */
- drv_generic_parport_control(enable, 0);
-
- /* Address hold time */
- ndelay(T_AH);
-
- drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, 0);
- } else {
- /* Lower EN */
- drv_generic_parport_data(SIGNAL_RW);
- ndelay(T_AH);
- drv_generic_parport_data(0);
- }
-
- /* set data-lines to output */
- drv_generic_parport_direction(0);
- }
- ctrlmask >>= 1;
- }
-}
-
-
-static void drv_HD_PP_nibble(const unsigned char controller, const unsigned char nibble)
-{
- unsigned char enable;
-
- /* enable signal: 'controller' is a bitmask */
- /* bit n .. send to controller #n */
- /* so we can send a byte to more controllers at the same time! */
- enable = 0;
- if (controller & 0x01)
- enable |= SIGNAL_ENABLE;
- if (controller & 0x02)
- enable |= SIGNAL_ENABLE2;
- if (controller & 0x04)
- enable |= SIGNAL_ENABLE3;
- if (controller & 0x08)
- enable |= SIGNAL_ENABLE4;
-
- /* clear ENABLE */
- /* put data on DB1..DB4 */
- /* nibble already contains RS bit! */
- drv_generic_parport_data(nibble);
-
- /* Address set-up time */
- ndelay(T_AS);
-
- /* rise ENABLE */
- drv_generic_parport_data(nibble | enable);
-
- /* Enable pulse width */
- ndelay(T_PW);
-
- /* lower ENABLE */
- drv_generic_parport_data(nibble);
-}
-
-
-static void drv_HD_PP_byte(const unsigned char controller, const unsigned char data, const unsigned char RS)
-{
- /* send high nibble of the data */
- drv_HD_PP_nibble(controller, ((data >> 4) & 0x0f) | RS);
-
- /* Make sure we honour T_CYCLE */
- ndelay(T_CYCLE - T_AS - T_PW);
-
- /* send low nibble of the data */
- drv_HD_PP_nibble(controller, (data & 0x0f) | RS);
-}
-
-
-static void drv_HD_PP_command(const unsigned char controller, const unsigned char cmd, const int delay)
-{
- unsigned char enable;
-
- if (UseBusy)
- drv_HD_PP_busy(controller);
-
- if (Bits == 8) {
-
- /* enable signal: 'controller' is a bitmask */
- /* bit n .. send to controller #n */
- /* so we can send a byte to more controllers at the same time! */
- enable = 0;
- if (controller & 0x01)
- enable |= SIGNAL_ENABLE;
- if (controller & 0x02)
- enable |= SIGNAL_ENABLE2;
- if (controller & 0x04)
- enable |= SIGNAL_ENABLE3;
- if (controller & 0x08)
- enable |= SIGNAL_ENABLE4;
-
- /* put data on DB1..DB8 */
- drv_generic_parport_data(cmd);
-
- /* clear RW and RS */
- drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, 0);
-
- /* Address set-up time */
- ndelay(T_AS);
-
- /* send command */
- drv_generic_parport_toggle(enable, 1, T_PW);
-
- } else {
-
- drv_HD_PP_byte(controller, cmd, 0);
-
- }
-
- /* wait for command completion */
- if (!UseBusy)
- udelay(delay);
-
-}
-
-
-static void drv_HD_PP_data(const unsigned char controller, const char *string, const int len, const int delay)
-{
- int l = len;
- unsigned char enable;
-
- /* sanity check */
- if (len <= 0)
- return;
-
- if (Bits == 8) {
-
- /* enable signal: 'controller' is a bitmask */
- /* bit n .. send to controller #n */
- /* so we can send a byte to more controllers at the same time! */
- enable = 0;
- if (controller & 0x01)
- enable |= SIGNAL_ENABLE;
- if (controller & 0x02)
- enable |= SIGNAL_ENABLE2;
- if (controller & 0x04)
- enable |= SIGNAL_ENABLE3;
- if (controller & 0x08)
- enable |= SIGNAL_ENABLE4;
-
- if (!UseBusy) {
- /* clear RW, set RS */
- drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, SIGNAL_RS);
- /* Address set-up time */
- ndelay(T_AS);
- }
-
- while (l--) {
-
- if (UseBusy) {
- drv_HD_PP_busy(controller);
- /* clear RW, set RS */
- drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, SIGNAL_RS);
- /* Address set-up time */
- ndelay(T_AS);
- }
-
- /* put data on DB1..DB8 */
- drv_generic_parport_data(*(string++));
-
- /* send command */
- drv_generic_parport_toggle(enable, 1, T_PW);
-
- /* wait for command completion */
- if (!UseBusy)
- udelay(delay);
- }
-
- } else { /* 4 bit mode */
-
- while (l--) {
- if (UseBusy)
- drv_HD_PP_busy(controller);
-
- /* send data with RS enabled */
- drv_HD_PP_byte(controller, *(string++), SIGNAL_RS);
-
- /* wait for command completion */
- if (!UseBusy)
- udelay(delay);
- }
- }
-}
-
-
-static int drv_HD_PP_load(const char *section)
-{
- if (cfg_number(section, "Bits", 8, 4, 8, &Bits) < 0)
- return -1;
-
- if (Bits != 4 && Bits != 8) {
- error("%s: bad %s.Bits '%d' from %s, should be '4' or '8'", Name, section, Bits, cfg_source());
- return -1;
- }
-
- /* LCM-162 only supports 8-bit-mode */
- if (Capabilities & CAP_LCM162 && Bits != 8) {
- error("%s: Model '%s' does not support %d bit mode!", Name, Models[Model].name, Bits);
- Bits = 8;
- }
- info("%s: using %d bit mode", Name, Bits);
-
- if (drv_generic_parport_open(section, Name) != 0) {
- error("%s: could not initialize parallel port!", Name);
- return -1;
- }
-
- /* Soft-Wiring */
- if (Capabilities & CAP_LCM162) {
- /* the LCM-162 is hardwired */
- if ((SIGNAL_RS = drv_generic_parport_hardwire_ctrl("RS", "SLCTIN")) == 0xff)
- return -1;
- if ((SIGNAL_RW = drv_generic_parport_hardwire_ctrl("RW", "INIT")) == 0xff)
- return -1;
- if ((SIGNAL_ENABLE = drv_generic_parport_hardwire_ctrl("ENABLE", "AUTOFD")) == 0xff)
- return -1;
- if ((SIGNAL_ENABLE2 = drv_generic_parport_hardwire_ctrl("ENABLE2", "GND")) == 0xff)
- return -1;
- if ((SIGNAL_ENABLE3 = drv_generic_parport_hardwire_ctrl("ENABLE3", "GND")) == 0xff)
- return -1;
- if ((SIGNAL_ENABLE4 = drv_generic_parport_hardwire_ctrl("ENABLE4", "GND")) == 0xff)
- return -1;
- if ((SIGNAL_BACKLIGHT = drv_generic_parport_hardwire_ctrl("BACKLIGHT", "GND")) == 0xff)
- return -1;
- if ((SIGNAL_GPO = drv_generic_parport_hardwire_ctrl("GPO", "GND")) == 0xff)
- return -1;
- } else {
- if (Bits == 8) {
- if ((SIGNAL_RS = drv_generic_parport_wire_ctrl("RS", "AUTOFD")) == 0xff)
- return -1;
- if ((SIGNAL_RW = drv_generic_parport_wire_ctrl("RW", "GND")) == 0xff)
- return -1;
- if ((SIGNAL_ENABLE = drv_generic_parport_wire_ctrl("ENABLE", "STROBE")) == 0xff)
- return -1;
- if ((SIGNAL_ENABLE2 = drv_generic_parport_wire_ctrl("ENABLE2", "GND")) == 0xff)
- return -1;
- if ((SIGNAL_ENABLE3 = drv_generic_parport_wire_ctrl("ENABLE3", "GND")) == 0xff)
- return -1;
- if ((SIGNAL_ENABLE4 = drv_generic_parport_wire_ctrl("ENABLE4", "GND")) == 0xff)
- return -1;
- } else {
- if ((SIGNAL_RS = drv_generic_parport_wire_data("RS", "DB4")) == 0xff)
- return -1;
- if ((SIGNAL_RW = drv_generic_parport_wire_data("RW", "DB5")) == 0xff)
- return -1;
- if ((SIGNAL_ENABLE = drv_generic_parport_wire_data("ENABLE", "DB6")) == 0xff)
- return -1;
- if ((SIGNAL_ENABLE2 = drv_generic_parport_wire_data("ENABLE2", "GND")) == 0xff)
- return -1;
- if ((SIGNAL_ENABLE3 = drv_generic_parport_wire_data("ENABLE3", "GND")) == 0xff)
- return -1;
- if ((SIGNAL_ENABLE4 = drv_generic_parport_wire_data("ENABLE4", "GND")) == 0xff)
- return -1;
- }
- /* backlight and GPO are always control signals */
- if ((SIGNAL_BACKLIGHT = drv_generic_parport_wire_ctrl("BACKLIGHT", "GND")) == 0xff)
- return -1;
- if ((SIGNAL_GPO = drv_generic_parport_wire_ctrl("GPO", "GND")) == 0xff)
- return -1;
- }
-
- /* clear capabilities if corresponding signal is GND */
- if (SIGNAL_BACKLIGHT == 0) {
- Capabilities &= ~CAP_BACKLIGHT;
- }
- if (SIGNAL_GPO == 0) {
- Capabilities &= ~CAP_GPO;
- }
-
-
- /* clear all signals */
- if (Bits == 8) {
- drv_generic_parport_control(SIGNAL_RS |
- SIGNAL_RW | SIGNAL_ENABLE | SIGNAL_ENABLE2 | SIGNAL_ENABLE3 | SIGNAL_ENABLE4 | SIGNAL_BACKLIGHT | SIGNAL_GPO, 0);
- } else {
- drv_generic_parport_data(0);
- }
-
- /* set direction: write */
- drv_generic_parport_direction(0);
-
- /* initialize *all* controllers */
- if (Bits == 8) {
- drv_HD_PP_command(allControllers, 0x30, T_INIT1); /* 8 Bit mode, wait 4.1 ms */
- drv_HD_PP_command(allControllers, 0x30, T_INIT2); /* 8 Bit mode, wait 100 us */
- drv_HD_PP_command(allControllers, 0x38, T_EXEC); /* 8 Bit mode, 1/16 duty cycle, 5x8 font */
- } else {
- drv_HD_PP_nibble(allControllers, 0x03);
- udelay(T_INIT1); /* 4 Bit mode, wait 4.1 ms */
- drv_HD_PP_nibble(allControllers, 0x03);
- udelay(T_INIT2); /* 4 Bit mode, wait 100 us */
- drv_HD_PP_nibble(allControllers, 0x03);
- udelay(T_INIT1); /* 4 Bit mode, wait 4.1 ms */
- drv_HD_PP_nibble(allControllers, 0x02);
- udelay(T_INIT2); /* 4 Bit mode, wait 100 us */
- drv_HD_PP_command(allControllers, 0x28, T_EXEC); /* 4 Bit mode, 1/16 duty cycle, 5x8 font */
- }
-
- /* maybe use busy-flag from now on */
- /* (we can't use the busy flag during the init sequence) */
- cfg_number(section, "UseBusy", 0, 0, 1, &UseBusy);
-
- /* make sure we don't use the busy flag with RW wired to GND */
- if (UseBusy && !SIGNAL_RW) {
- error("%s: busy-flag checking is impossible with RW wired to GND!", Name);
- UseBusy = 0;
- }
-
- /* make sure the display supports busy-flag checking in 4-Bit-Mode */
- /* at the moment this is inly possible with Martin Hejl's gpio driver, */
- /* which allows to use 4 bits as input and 4 bits as output */
- if (UseBusy && Bits == 4 && !(Capabilities & CAP_BUSY4BIT)) {
- error("%s: Model '%s' does not support busy-flag checking in 4 bit mode", Name, Models[Model].name);
- UseBusy = 0;
- }
-
- info("%s: %susing busy-flag checking", Name, UseBusy ? "" : "not ");
-
- /* The LCM-162 should really use BusyFlag checking */
- if (!UseBusy && (Capabilities & CAP_LCM162)) {
- error("%s: Model '%s' should definitely use busy-flag checking!", Name, Models[Model].name);
- }
-
- return 0;
-}
-
-
-static void drv_HD_PP_stop(void)
-{
- /* clear all signals */
- if (Bits == 8) {
- drv_generic_parport_control(SIGNAL_RS |
- SIGNAL_RW | SIGNAL_ENABLE | SIGNAL_ENABLE2 | SIGNAL_ENABLE3 | SIGNAL_ENABLE4 | SIGNAL_BACKLIGHT | SIGNAL_GPO, 0);
- } else {
- drv_generic_parport_data(0);
- }
-
- drv_generic_parport_close();
-
-}
-
-
-#ifdef WITH_I2C
-
-/****************************************/
-/*** i2c dependant functions ***/
-/****************************************/
-
- /*
- DISCLAIMER!!!!
-
- The following code is WORK IN PROGRESS, since it basicly 'works for us...'
-
- (C) 2005 Paul Kamphuis & Luis Correia
-
- We have removed all of the delays from this code, as the I2C bus is slow enough...
- (maximum possible speed is 100KHz only)
-
- */
-
-static void drv_HD_I2C_nibble(unsigned char controller, unsigned char nibble)
-{
- unsigned char enable;
- unsigned char command; /* this is actually the first data byte on the PCF8574 */
- unsigned char data_block[2];
- /* enable signal: 'controller' is a bitmask */
- /* bit n .. send to controller #n */
- /* so we can send a byte to more controllers at the same time! */
- enable = 0;
- if (controller & 0x01)
- enable |= SIGNAL_ENABLE;
- if (controller & 0x02)
- enable |= SIGNAL_ENABLE2;
- if (controller & 0x04)
- enable |= SIGNAL_ENABLE3;
- if (controller & 0x08)
- enable |= SIGNAL_ENABLE4;
-
- /*
- The new method Paul Kamphuis has concocted places the 3 needed writes to the I2C device
- as a single operation, using the 'i2c_smbus_write_block_data' function.
- These actual writes are performed by putting the nibble along with the 'EN' signal.
-
- command = first byte to be written, which contains the nibble (DB0..DB3)
- data [0] = second byte to be written, which contains the nibble plus the EN signal
- data [1] = third byte to be written, which contains the nibble (DB0..DB3)
-
- Then we write the block as a whole.
-
- The main advantage we see is that we do 2 less IOCTL's from our driver.
- */
-
- command = nibble;
- data_block[0] = nibble | enable;
- data_block[1] = nibble;
-
- drv_generic_i2c_command(command,data_block,2);
-}
-
-
-static void drv_HD_I2C_byte(const unsigned char controller, const unsigned char data)
-{
- /* send data with RS enabled */
- drv_HD_I2C_nibble(controller, ((data >> 4) & 0x0f) | SIGNAL_RS);
- drv_HD_I2C_nibble(controller, (data & 0x0f) | SIGNAL_RS);
-}
-
-
-static void drv_HD_I2C_command(const unsigned char controller, const unsigned char cmd, const int delay)
-{
- /* send data with RS disabled */
- drv_HD_I2C_nibble(controller, ((cmd >> 4) & 0x0f));
- drv_HD_I2C_nibble(controller, ((cmd) & 0x0f));
-}
-
-static void drv_HD_I2C_data(const unsigned char controller, const char *string, const int len, const int delay)
-{
- int l = len;
-
- /* sanity check */
- if (len <= 0)
- return;
-
- while (l--) {
- drv_HD_I2C_byte(controller, *(string++));
- }
-}
-
-
-static int drv_HD_I2C_load(const char *section)
-{
- if (cfg_number(section, "Bits", 8, 4, 8, &Bits) < 0)
- return -1;
- if (Bits != 4) {
- error("%s: bad %s.Bits '%d' from %s, should be '4'", Name, section, Bits, cfg_source());
- return -1;
- }
-
- info("%s: using %d bit mode", Name, Bits);
-
- if (drv_generic_i2c_open(section, Name) != 0) {
- error("%s: could not initialize i2c attached device!", Name);
- return -1;
- }
-
- if ((SIGNAL_RS = drv_generic_i2c_wire("RS", "DB4")) == 0xff)
- return -1;
- if ((SIGNAL_RW = drv_generic_i2c_wire("RW", "DB5")) == 0xff)
- return -1;
- if ((SIGNAL_ENABLE = drv_generic_i2c_wire("ENABLE", "DB6")) == 0xff)
- return -1;
- if ((SIGNAL_ENABLE2 = drv_generic_i2c_wire("ENABLE2", "GND")) == 0xff)
- return -1;
- if ((SIGNAL_GPO = drv_generic_i2c_wire("GPO", "GND")) == 0xff)
- return -1;
-
- /* initialize display */
- drv_HD_I2C_nibble(allControllers, 0x03);
- udelay(T_INIT1); /* 4 Bit mode, wait 4.1 ms */
- drv_HD_I2C_nibble(allControllers, 0x03);
- udelay(T_INIT2); /* 4 Bit mode, wait 100 us */
- drv_HD_I2C_nibble(allControllers, 0x03);
- udelay(T_INIT2); /* 4 Bit mode, wait 4.1 ms */
- drv_HD_I2C_nibble(allControllers, 0x02);
- udelay(T_INIT2); /* 4 Bit mode, wait 100 us */
- drv_HD_I2C_command(allControllers, 0x28, T_EXEC); /* 4 Bit mode, 1/16 duty cycle, 5x8 font */
-
- info("%s: I2C initialization done", Name);
-
- return 0;
-}
-
-
-static void drv_HD_I2C_stop(void)
-{
- /* clear all signals */
- drv_generic_i2c_data(0);
-
- /* close port */
- drv_generic_i2c_close();
-}
-
-/* END OF DISCLAIMER */
-
-#endif /* WITH_I2C */
-
-
-/****************************************/
-/*** display dependant functions ***/
-/****************************************/
-
-static void drv_HD_clear(void)
-{
- drv_HD_command(allControllers, 0x01, T_CLEAR); /* clear *all* displays */
-}
-
-
-static int drv_HD_goto(int row, int col)
-{
- int pos, controller;
-
- /* handle multiple controllers */
- for (pos = 0, controller = 0; controller < numControllers; controller++) {
- pos += CROWS[controller];
- if (row < pos) {
- currController = (1 << controller);
- break;
- }
- row -= CROWS[controller];
- }
-
- /* column outside of current display's width */
- if (col >= CCOLS[controller])
- return -1;
-
- if (0) {
- debug("goto: [%d,%d] mask=%d, controller=%d, size:%dx%d", row, col, currController, controller, CROWS[controller], CCOLS[controller]);
- }
-
- /* 16x1 Displays are organized as 8x2 :-( */
- if (CCOLS[controller] == 16 && CROWS[controller] == 1 && col > 7) {
- row++;
- col -= 8;
- }
-
- if (Capabilities & CAP_HD66712) {
- /* the HD66712 doesn't have a braindamadged RAM layout */
- pos = row * 32 + col;
- } else {
- /* 16x4 Controllers use a slightly different layout */
- if (CCOLS[controller] == 16 && CROWS[controller] == 4) {
- pos = (row % 2) * 64 + (row / 2) * 16 + col;
- } else {
- pos = (row % 2) * 64 + (row / 2) * 20 + col;
- }
- }
- drv_HD_command(currController, (0x80 | pos), T_EXEC);
-
- /* return columns left on current display */
- return CCOLS[controller] - col;
-
-}
-
-
-static void drv_HD_write(const int row, const int col, const char *data, const int len)
-{
- int space = drv_HD_goto(row, col);
- if (space > 0) {
- drv_HD_data(currController, data, len > space ? space : len, T_EXEC);
- }
-}
-
-
-static void drv_HD_defchar(const int ascii, const unsigned char *matrix)
-{
- int i;
- char buffer[8];
-
- for (i = 0; i < 8; i++) {
- buffer[i] = matrix[i] & 0x1f;
- }
-
- /* define chars on *all* controllers! */
- drv_HD_command(allControllers, 0x40 | 8 * ascii, T_EXEC);
- drv_HD_data(allControllers, buffer, 8, T_WRCG);
-}
-
-
-static int drv_HD_backlight(int backlight)
-{
- if (!(Capabilities & CAP_BACKLIGHT))
- return -1;
-
- if (backlight < 0)
- backlight = 0;
- if (backlight > 1)
- backlight = 1;
-
- drv_generic_parport_control(SIGNAL_BACKLIGHT, backlight ? SIGNAL_BACKLIGHT : 0);
-
- return backlight;
-}
-
-
-static int drv_HD_brightness(int brightness)
-{
- char cmd;
-
- if (!(Capabilities & CAP_BRIGHTNESS))
- return -1;
-
- if (brightness < 0)
- brightness = 0;
- if (brightness > 3)
- brightness = 3;
-
- cmd = '0' + brightness;
-
- drv_HD_command(allControllers, 0x38, T_EXEC); /* enable function */
- drv_HD_data(allControllers, &cmd, 1, T_WRCG); /* set brightness */
-
- return brightness;
-}
-
-
-/* Fixme: GPO's */
-#if 0
-static void drv_HD_setGPO(const int bits)
-{
- if (Lcd.gpos > 0) {
-
- /* put data on DB1..DB8 */
- drv_generic_parport_data(bits);
-
- /* 74HCT573 set-up time */
- ndelay(20);
-
- /* send data */
- /* 74HCT573 enable pulse width = 24ns */
- drv_generic_parport_toggle(SIGNAL_GPO, 1, 230);
- }
-}
-#endif
-
-
-static void drv_HD_LCM162_timer(void __attribute__ ((unused)) * notused)
-{
- static unsigned char data = 0x00;
-
- /* Bit 3+5 : key number */
- /* Bit 6 : key press/release */
- unsigned char mask3 = 1 << 3;
- unsigned char mask5 = 1 << 5;
- unsigned char mask6 = 1 << 6;
- unsigned char mask = mask3 | mask5 | mask6;
-
- int keynum;
- int updown;
-
- unsigned char temp;
-
- temp = drv_generic_parport_status() & mask;
-
- if (data != temp) {
- data = temp;
-
- keynum = (data & mask3 ? 1 : 0) + (data & mask5 ? 2 : 0);
- updown = (data & mask6 ? 1 : 0);
-
- debug("key %d press %d", keynum, updown);
- }
-}
-
-
-static int drv_HD_start(const char *section, const int quiet)
-{
- char *model, *size, *bus;
- int rows = -1, cols = -1, gpos = -1, i;
- int size_defined = 0;
- int size_missing = 0;
-
- model = cfg_get(section, "Model", "generic");
- if (model != NULL && *model != '\0') {
- int i;
- for (i = 0; Models[i].type != 0xff; i++) {
- if (strcasecmp(Models[i].name, model) == 0)
- break;
- }
- if (Models[i].type == 0xff) {
- error("%s: %s.Model '%s' is unknown from %s", Name, section, model, cfg_source());
- return -1;
- }
- Model = i;
- Capabilities = Models[Model].capabilities;
- info("%s: using model '%s'", Name, Models[Model].name);
- } else {
- error("%s: empty '%s.Model' entry from %s", Name, section, cfg_source());
- if (model)
- free(model);
- return -1;
- }
- free(model);
-
- bus = cfg_get(section, "Bus", "parport");
- if (bus == NULL && *bus == '\0') {
- error("%s: empty '%s.Bus' entry from %s", Name, section, cfg_source());
- if (bus)
- free(bus);
- return -1;
- }
-
- if (strcasecmp(bus, "parport") == 0) {
- info("%s: using parallel port", Name);
- Bus = BUS_PP;
- drv_HD_load = drv_HD_PP_load;
- drv_HD_command = drv_HD_PP_command;
- drv_HD_data = drv_HD_PP_data;
- drv_HD_stop = drv_HD_PP_stop;
-
- } else if (strcasecmp(bus, "i2c") == 0) {
-#ifdef WITH_I2C
- info("%s: using I2C bus", Name);
- Bus = BUS_I2C;
- drv_HD_load = drv_HD_I2C_load;
- drv_HD_command = drv_HD_I2C_command;
- drv_HD_data = drv_HD_I2C_data;
- drv_HD_stop = drv_HD_I2C_stop;
-#else
- error("%s: %s.Bus '%s' from %s not available:", Name, section, bus, cfg_source());
- error("%s: lcd4linux was compiled without i2c support!", Name);
- free(bus);
- return -1;
-#endif
-
- } else {
- error("%s: bad %s.Bus '%s' from %s, should be 'parport' or 'i2c'", Name, section, bus, cfg_source());
- free(bus);
- return -1;
- }
-
- /* sanity check: Model can use bus */
- if (!(Capabilities & Bus)) {
- error("%s: Model '%s' cannot be used on the %s bus!", Name, Models[Model].name, bus);
- free(bus);
- return -1;
- }
- free(bus);
-
- if (cfg_number(section, "Controllers", 1, 1, 4, (int *) &numControllers) < 0)
- return -1;
- info("%s: using %d Controller(s)", Name, numControllers);
-
- /* current Controller */
- currController = 1;
-
- /* Bitmask for *all* Controllers */
- allControllers = (1 << numControllers) - 1;
-
-
- DCOLS = 0;
- DROWS = 0;
-
- for (i = 0; i < numControllers; i++) {
- char key[6];
- qprintf(key, sizeof(key), "Size%d", i + 1);
- size = cfg_get(section, key, NULL);
- if (size == NULL || *size == '\0') {
- size_missing++;
- free(size);
- continue;
- }
- if (sscanf(size, "%dx%d", &cols, &rows) != 2 || rows < 1 || cols < 1) {
- error("%s: bad %s.%s '%s' from %s", Name, section, key, size, cfg_source());
- free(size);
- return -1;
- }
- free(size);
- CCOLS[i] = cols;
- CROWS[i] = rows;
- size_defined++;
- info("%s: Controller %d: %dx%d", Name, i + 1, cols, rows);
- /* grow the size */
- if (cols > DCOLS)
- DCOLS = cols;
- DROWS += rows;
- }
- if (size_defined && size_missing) {
- error("%s: bad %s.Size* definition in %s:", Name, section, cfg_source());
- error("%s: either you specify the size for *all* controllers or for none.", Name);
- return -1;
- }
-
- size = cfg_get(section, "Size", NULL);
- if (size != NULL && *size != '\0') {
- if (sscanf(size, "%dx%d", &cols, &rows) != 2 || rows < 1 || cols < 1) {
- error("%s: bad %s.Size '%s' from %s", Name, section, size, cfg_source());
- free(size);
- return -1;
- }
- if (DCOLS == 0 && DROWS == 0) {
- for (i = 0; i < numControllers; i++) {
- CCOLS[i] = cols;
- CROWS[i] = rows / numControllers;
- DCOLS = CCOLS[i];
- DROWS += CROWS[i];
- }
- }
- if (rows != DROWS || cols != DCOLS) {
- error("%s: bad %s.Size definition in %s:", Name, section, cfg_source());
- error("%s: Size %dx%d should be %dx%d", Name, cols, rows, DCOLS, DROWS);
- return -1;
- }
- }
- free(size);
-
-
- if (cfg_number(section, "GPOs", 0, 0, 8, &gpos) < 0)
- return -1;
- if (gpos > 0 && !(Capabilities & CAP_GPO)) {
- error("%s: Model '%s' does not support GPO's!", Name, Models[Model].name);
- gpos = 0;
- }
- GPOS = gpos;
- if (gpos > 0) {
- info("%s: using %d GPO's", Name, GPOS);
- }
-
- if (drv_HD_load(section) < 0) {
- error("%s: start display failed!", Name);
- return -1;
- }
-
- drv_HD_command(allControllers, 0x08, T_EXEC); /* Controller off, cursor off, blink off */
- drv_HD_command(allControllers, 0x0c, T_CLEAR); /* Display on, cursor off, blink off, wait 1.64 ms */
- drv_HD_command(allControllers, 0x06, T_EXEC); /* curser moves to right, no shift */
-
- if ((Capabilities & CAP_HD66712) && DROWS > 2) {
- drv_HD_command(allControllers, Bits == 8 ? 0x3c : 0x2c, T_EXEC); /* set extended register enable bit */
- drv_HD_command(allControllers, 0x09, T_EXEC); /* set 4-line mode */
- drv_HD_command(allControllers, Bits == 8 ? 0x38 : 0x28, T_EXEC); /* clear extended register enable bit */
- }
-
- drv_HD_clear(); /* clear *all* displays */
- drv_HD_command(allControllers, 0x03, T_CLEAR); /* return home */
-
- /* maybe set backlight */
- if (Capabilities & CAP_BACKLIGHT) {
- int backlight;
- if (cfg_number(section, "Backlight", 0, 0, 1, &backlight) > 0) {
- info("%s: backlight %s", Name, backlight ? "enabled" : "disabled");
- drv_HD_backlight(backlight);
- }
- }
-
- /* maybe set brightness */
- if (Capabilities & CAP_BRIGHTNESS) {
- int brightness;
- if (cfg_number(section, "Brightness", 0, 0, 3, &brightness) > 0) {
- info("%s: brightness level %d", Name, brightness);
- drv_HD_brightness(brightness);
- }
- }
-
- /* install keypad polling timer for LCM-162 */
- if (Capabilities & CAP_LCM162) {
- timer_add(drv_HD_LCM162_timer, NULL, 10, 0);
- }
-
- if (!quiet) {
- char buffer[40];
- qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS);
- if (drv_generic_text_greet(buffer, NULL)) {
- sleep(3);
- drv_HD_clear();
- }
- }
-
- return 0;
-}
-
-
-/****************************************/
-/*** plugins ***/
-/****************************************/
-
-
-static void plugin_backlight(RESULT * result, RESULT * arg1)
-{
- double backlight;
-
- backlight = drv_HD_backlight(R2N(arg1));
- SetResult(&result, R_NUMBER, &backlight);
-}
-
-
-static void plugin_brightness(RESULT * result, RESULT * arg1)
-{
- double brightness;
-
- brightness = drv_HD_brightness(R2N(arg1));
- SetResult(&result, R_NUMBER, &brightness);
-}
-
-
-/****************************************/
-/*** widget callbacks ***/
-/****************************************/
-
-
-/* using drv_generic_text_draw(W) */
-/* using drv_generic_text_icon_draw(W) */
-/* using drv_generic_text_bar_draw(W) */
-
-
-/****************************************/
-/*** exported functions ***/
-/****************************************/
-
-
-/* list models */
-int drv_HD_list(void)
-{
- int i;
-
- for (i = 0; Models[i].type != 0xff; i++) {
- printf("%s ", Models[i].name);
- }
- return 0;
-}
-
-
-/* initialize driver & display */
-int drv_HD_init(const char *section, const int quiet)
-{
- WIDGET_CLASS wc;
- int asc255bug;
- int ret;
-
- /* display preferences */
- XRES = 5; /* pixel width of one char */
- YRES = 8; /* pixel height of one char */
- CHARS = 8; /* number of user-defineable characters */
- CHAR0 = 0; /* ASCII of first user-defineable char */
- GOTO_COST = 1; /* number of bytes a goto command requires */
-
- /* real worker functions */
- drv_generic_text_real_write = drv_HD_write;
- drv_generic_text_real_defchar = drv_HD_defchar;
-
-
- /* start display */
- if ((ret = drv_HD_start(section, quiet)) != 0)
- return ret;
-
- /* initialize generic text driver */
- if ((ret = drv_generic_text_init(section, Name)) != 0)
- return ret;
-
- /* initialize generic icon driver */
- if ((ret = drv_generic_text_icon_init()) != 0)
- return ret;
-
- /* initialize generic bar driver */
- if ((ret = drv_generic_text_bar_init(0)) != 0)
- return ret;
-
- /* add fixed chars to the bar driver */
- /* most displays have a full block on ascii 255, but some have kind of */
- /* an 'inverted P'. If you specify 'asc255bug 1 in the config, this */
- /* char will not be used, but rendered by the bar driver */
- cfg_number(section, "asc255bug", 0, 0, 1, &asc255bug);
- drv_generic_text_bar_add_segment(0, 0, 255, 32); /* ASCII 32 = blank */
- if (!asc255bug)
- drv_generic_text_bar_add_segment(255, 255, 255, 255); /* ASCII 255 = block */
-
- /* register text widget */
- wc = Widget_Text;
- wc.draw = drv_generic_text_draw;
- widget_register(&wc);
-
- /* register icon widget */
- wc = Widget_Icon;
- wc.draw = drv_generic_text_icon_draw;
- widget_register(&wc);
-
- /* register bar widget */
- wc = Widget_Bar;
- wc.draw = drv_generic_text_bar_draw;
- widget_register(&wc);
-
- /* register plugins */
- if (Capabilities & CAP_BACKLIGHT) {
- AddFunction("LCD::backlight", 1, plugin_backlight);
- }
- if (Capabilities & CAP_BRIGHTNESS) {
- AddFunction("LCD::brightness", 1, plugin_brightness);
- }
-
- return 0;
-}
-
-
-/* close driver & display */
-int drv_HD_quit(const int quiet)
-{
-
- info("%s: shutting down.", Name);
-
- drv_generic_text_quit();
-
- /* clear display */
- drv_HD_clear();
-
- /* say goodbye... */
- if (!quiet) {
- drv_generic_text_greet("goodbye!", NULL);
- }
-
- drv_HD_stop();
-
- return (0);
-}
-
-
-DRIVER drv_HD44780 = {
- name:Name,
- list:drv_HD_list,
- init:drv_HD_init,
- quit:drv_HD_quit,
-};
+ *
+ * Revision 1.50 2005/05/31 20:42:55 lfcorreia
+ * new file: lcd4linux_i2c.h
+ * avoid the problems detecting the proper I2C kernel include files
+ *
+ * rearrange all the other autoconf stuff to remove I2C detection
+ *
+ * new method by Paul Kamphuis to write to the I2C device
+ *
+ * Revision 1.49 2005/05/08 04:32:44 reinelt
+ * CodingStyle added and applied
+ *
+ * Revision 1.48 2005/05/05 08:36:12 reinelt
+ * changed SELECT to SLCTIN
+ *
+ * Revision 1.47 2005/03/28 22:29:23 reinelt
+ * HD44780 multiple displays patch from geronet
+ *
+ * Revision 1.46 2005/03/28 19:39:23 reinelt
+ * HD44780/I2C patch from Luis merged (still does not work for me)
+ *
+ * Revision 1.45 2005/03/25 15:44:43 reinelt
+ * HD44780 Backlight fixed (thanks to geronet)
+ *
+ * Revision 1.44 2005/01/29 09:30:56 reinelt
+ * minor HD44780 cleanups
+ *
+ * Revision 1.43 2005/01/18 06:30:23 reinelt
+ * added (C) to all copyright statements
+ *
+ * Revision 1.42 2005/01/17 06:38:48 reinelt
+ * info about backlight and brightness
+ *
+ * Revision 1.41 2005/01/17 06:29:24 reinelt
+ * added software-controlled backlight support to HD44780
+ *
+ * Revision 1.40 2004/11/30 05:01:25 reinelt
+ * removed compiler warnings for deactivated i2c bus
+ *
+ * Revision 1.39 2004/10/17 09:24:31 reinelt
+ * I2C support for HD44780 displays by Luis (does not work by now)
+ *
+ * Revision 1.38 2004/09/19 09:31:19 reinelt
+ * HD44780 busy flag checking improved: fall back to busy-waiting if too many errors occur
+ *
+ * Revision 1.37 2004/09/18 15:58:57 reinelt
+ * even more HD44780 cleanups, hardwiring for LCM-162
+ *
+ * Revision 1.36 2004/09/18 10:57:29 reinelt
+ * more parport/i2c cleanups
+ *
+ * Revision 1.35 2004/09/18 09:48:29 reinelt
+ * HD44780 cleanup and prepararation for I2C backend
+ * LCM-162 submodel framework
+ *
+ * Revision 1.34 2004/09/18 08:22:59 reinelt
+ * drv_generic_parport_status() to read status lines
+ *
+ * Revision 1.33 2004/08/29 13:03:41 reinelt
+ *
+ * added RouterBoard driver
+ *
+ * Revision 1.32 2004/06/26 12:04:59 reinelt
+ *
+ * uh-oh... the last CVS log message messed up things a lot...
+ *
+ * Revision 1.31 2004/06/26 09:27:20 reinelt
+ *
+ * added '-W' to CFLAGS
+ * changed all C++ comments to C ones
+ * cleaned up a lot of signed/unsigned mistakes
+ *
+ * Revision 1.30 2004/06/20 10:09:54 reinelt
+ *
+ * 'const'ified the whole source
+ *
+ * Revision 1.29 2004/06/06 06:51:59 reinelt
+ *
+ * do not display end splash screen if quiet=1
+ *
+ * Revision 1.28 2004/06/05 06:41:39 reinelt
+ *
+ * chancged splash screen again
+ *
+ * Revision 1.27 2004/06/05 06:13:11 reinelt
+ *
+ * splash screen for all text-based display drivers
+ *
+ * Revision 1.26 2004/06/02 10:09:22 reinelt
+ *
+ * splash screen for HD44780
+ *
+ * Revision 1.25 2004/06/02 09:41:19 reinelt
+ *
+ * prepared support for startup splash screen
+ *
+ * Revision 1.24 2004/06/01 06:45:29 reinelt
+ *
+ * some Fixme's processed
+ * documented some code
+ *
+ * Revision 1.23 2004/05/31 05:38:02 reinelt
+ *
+ * fixed possible bugs with user-defined chars (clear high bits)
+ * thanks to Andy Baxter for debugging the MilfordInstruments driver!
+ *
+ * Revision 1.22 2004/05/27 03:39:47 reinelt
+ *
+ * changed function naming scheme to plugin::function
+ *
+ * Revision 1.21 2004/05/26 11:37:36 reinelt
+ *
+ * Curses driver ported.
+ *
+ * Revision 1.20 2004/05/22 04:23:49 reinelt
+ *
+ * removed 16*x fix again (next time think before commit :-)
+ *
+ * Revision 1.19 2004/05/22 04:21:02 reinelt
+ *
+ * fix for display RAM layout on 16x4 displays (thanks to toxicated101)
+ *
+ * Revision 1.18 2004/03/20 07:31:32 reinelt
+ * support for HD66712 (which has a different RAM layout)
+ * further threading development
+ *
+ * Revision 1.17 2004/03/19 09:17:46 reinelt
+ *
+ * removed the extra 'goto' function, row and col are additional parameters
+ * of the write() function now.
+ *
+ * Revision 1.16 2004/03/11 06:39:58 reinelt
+ * big patch from Martin:
+ * - reuse filehandles
+ * - memory leaks fixed
+ * - earlier busy-flag checking with HD44780
+ * - reuse memory for strings in RESULT and hash
+ * - netdev_fast to wavid time-consuming regex
+ *
+ * Revision 1.15 2004/03/03 03:47:04 reinelt
+ * big patch from Martin Hejl:
+ * - use qprintf() where appropriate
+ * - save CPU cycles on gettimeofday()
+ * - add quit() functions to free allocated memory
+ * - fixed lots of memory leaks
+ *
+ * Revision 1.14 2004/03/01 04:29:51 reinelt
+ * cfg_number() returns -1 on error, 0 if value not found (but default val used),
+ * and 1 if value was used from the configuration.
+ * HD44780 driver adopted to new cfg_number()
+ * Crystalfontz 631 driver nearly finished
+ *
+ * Revision 1.13 2004/02/15 21:43:43 reinelt
+ * T6963 driver nearly finished
+ * framework for graphic displays done
+ * i2c_sensors patch from Xavier
+ * some more old generation files removed
+ *
+ * Revision 1.12 2004/02/14 11:56:17 reinelt
+ * M50530 driver ported
+ * changed lots of 'char' to 'unsigned char'
+ *
+ * Revision 1.11 2004/02/04 19:10:51 reinelt
+ * Crystalfontz driver nearly finished
+ *
+ * Revision 1.10 2004/02/02 05:22:16 reinelt
+ * Brightness fpr Noritake Displays avaliable as a plugin
+ *
+ * Revision 1.9 2004/02/01 11:51:22 hejl
+ * Fixes for busy flag
+ *
+ * Revision 1.8 2004/02/01 08:05:12 reinelt
+ * Crystalfontz 633 extensions (CRC checking and stuff)
+ * Models table for HD44780
+ * Noritake VFD BVrightness patch from Bill Paxton
+ *
+ * Revision 1.7 2004/01/30 07:12:35 reinelt
+ * HD44780 busy-flag support from Martin Hejl
+ * loadavg() uClibc replacement from Martin Heyl
+ * round() uClibc replacement from Martin Hejl
+ * warning in i2c_sensors fixed
+ * [
+ *
+ * Revision 1.6 2004/01/29 04:40:02 reinelt
+ * every .c file includes "config.h" now
+ *
+ * Revision 1.5 2004/01/23 07:04:17 reinelt
+ * icons finished!
+ *
+ * Revision 1.4 2004/01/23 04:53:48 reinelt
+ * icon widget added (not finished yet!)
+ *
+ * Revision 1.3 2004/01/22 07:57:45 reinelt
+ * several bugs fixed where segfaulting on layout>display
+ * Crystalfontz driver optimized, 632 display already works
+ *
+ * Revision 1.2 2004/01/21 06:39:27 reinelt
+ * HD44780 missed the "clear display' sequence
+ * asc255bug handling added
+ * HD44780 tested, works here!
+ *
+ * Revision 1.1 2004/01/20 15:32:49 reinelt
+ * first version of Next Generation HD44780 (untested! but it compiles...)
+ * some cleanup in the other drivers
+ *
+ */
+
+/*
+ *
+ * exported fuctions:
+ *
+ * struct DRIVER drv_HD44780
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <termios.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <sys/ioctl.h>
+
+#include "debug.h"
+#include "cfg.h"
+#include "udelay.h"
+#include "qprintf.h"
+#include "timer.h"
+#include "plugin.h"
+#include "widget.h"
+#include "widget_text.h"
+#include "widget_icon.h"
+#include "widget_bar.h"
+#include "drv.h"
+#include "drv_generic_text.h"
+#include "drv_generic_parport.h"
+
+#ifdef WITH_I2C
+#include "drv_generic_i2c.h"
+#endif
+
+static char Name[] = "HD44780";
+
+static int Bus;
+static int Model;
+static int Capabilities;
+
+
+/* low level communication timings [nanoseconds]
+ * as these values differ from spec to spec,
+ * we use the worst-case values.
+ */
+
+#define T_CYCLE 1000 /* Enable cycle time */
+#define T_PW 450 /* Enable pulse width */
+#define T_AS 60 /* Address setup time */
+#define T_H 40 /* Data hold time */
+#define T_AH 20 /* Address hold time */
+
+
+/* HD44780 execution timings [microseconds]
+ * as these values differ from spec to spec,
+ * we use the worst-case values.
+ */
+
+#define T_INIT1 4100 /* first init sequence: 4.1 msec */
+#define T_INIT2 100 /* second init sequence: 100 usec */
+#define T_EXEC 80 /* normal execution time */
+#define T_WRCG 120 /* CG RAM Write */
+#define T_CLEAR 2250 /* Clear Display */
+
+
+static int Bits = 0;
+static int numControllers = 0;
+static int allControllers = 0;
+static int currController = 0;
+
+/* size of every single controller */
+static int CROWS[4];
+static int CCOLS[4];
+
+static unsigned char SIGNAL_RW;
+static unsigned char SIGNAL_RS;
+static unsigned char SIGNAL_ENABLE;
+static unsigned char SIGNAL_ENABLE2;
+static unsigned char SIGNAL_ENABLE3;
+static unsigned char SIGNAL_ENABLE4;
+static unsigned char SIGNAL_BACKLIGHT;
+static unsigned char SIGNAL_GPO;
+
+/* maximum time to wait for the busy-flag (in usec) */
+#define MAX_BUSYFLAG_WAIT 10000
+
+/* maximum busy flag errors before falling back to busy-waiting */
+#define MAX_BUSYFLAG_ERRORS 20
+
+/* flag for busy-waiting vs. busy flag checking */
+static int UseBusy = 0;
+
+
+/* Fixme: GPO's not yet implemented */
+static int GPOS;
+/* static int GPO=0; */
+
+
+typedef struct {
+ int type;
+ char *name;
+ int capabilities;
+} MODEL;
+
+#define CAP_PARPORT (1<<0)
+#define CAP_I2C (1<<1)
+#define CAP_GPO (1<<2)
+#define CAP_BACKLIGHT (1<<3)
+#define CAP_BRIGHTNESS (1<<4)
+#define CAP_BUSY4BIT (1<<5)
+#define CAP_HD66712 (1<<6)
+#define CAP_LCM162 (1<<7)
+
+#define BUS_PP CAP_PARPORT
+#define BUS_I2C CAP_I2C
+
+
+static MODEL Models[] = {
+ {0x01, "generic", CAP_PARPORT | CAP_I2C | CAP_GPO | CAP_BACKLIGHT},
+ {0x02, "Noritake", CAP_PARPORT | CAP_I2C | CAP_GPO | CAP_BRIGHTNESS},
+ {0x03, "Soekris", CAP_PARPORT | CAP_BUSY4BIT},
+ {0x04, "HD66712", CAP_PARPORT | CAP_I2C | CAP_GPO | CAP_BACKLIGHT | CAP_HD66712},
+ {0x05, "LCM-162", CAP_PARPORT | CAP_LCM162},
+ {0xff, "Unknown", 0}
+};
+
+
+/****************************************/
+/*** generic functions ***/
+/****************************************/
+
+static int (*drv_HD_load) (const char *section);
+static void (*drv_HD_command) (const unsigned char controller, const unsigned char cmd, const int delay);
+static void (*drv_HD_data) (const unsigned char controller, const char *string, const int len, const int delay);
+static void (*drv_HD_stop) (void);
+
+
+
+/****************************************/
+/*** parport dependant functions ***/
+/****************************************/
+
+static void drv_HD_PP_busy(const int controller)
+{
+ static unsigned int errors = 0;
+
+ unsigned char enable;
+ unsigned char data = 0xFF;
+ unsigned char busymask;
+ unsigned char ctrlmask;
+ unsigned int counter;
+
+ if (Bits == 8) {
+ busymask = 0x80;
+ } else {
+ /* Since in 4-Bit mode DB0 on the parport is mapped to DB4 on the LCD
+ * (and consequently, DB3 on the partport is mapped to DB7 on the LCD)
+ * we need to listen for DB3 on the parport to go low
+ */
+ busymask = 0x08;
+ }
+
+ ctrlmask = 0x08;
+ while (ctrlmask > 0) {
+
+ if (controller & ctrlmask) {
+
+ enable = 0;
+ if (ctrlmask & 0x01)
+ enable = SIGNAL_ENABLE;
+ else if (ctrlmask & 0x02)
+ enable = SIGNAL_ENABLE2;
+ else if (ctrlmask & 0x04)
+ enable = SIGNAL_ENABLE3;
+ else if (ctrlmask & 0x08)
+ enable = SIGNAL_ENABLE4;
+
+ /* set data-lines to input */
+ drv_generic_parport_direction(1);
+
+ if (Bits == 8) {
+ /* Set RW, clear RS */
+ drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, SIGNAL_RW);
+ } else {
+ drv_generic_parport_data(SIGNAL_RW);
+ }
+
+ /* Address set-up time */
+ ndelay(T_AS);
+
+ /* rise ENABLE */
+ if (Bits == 8) {
+ drv_generic_parport_control(enable, enable);
+ } else {
+ drv_generic_parport_data(SIGNAL_RW | enable);
+ }
+
+ counter = 0;
+ while (1) {
+ /* read the busy flag */
+ data = drv_generic_parport_read();
+ if ((data & busymask) == 0) {
+ errors = 0;
+ break;
+ }
+
+ /* make sure we don't wait forever
+ * - but only check after 5 iterations
+ * that way, we won't slow down normal mode
+ * (where we don't need the timeout anyway)
+ */
+ counter++;
+
+ if (counter >= 5) {
+ struct timeval now, end;
+
+ if (counter == 5) {
+ /* determine the time when the timeout has expired */
+ gettimeofday(&end, NULL);
+ end.tv_usec += MAX_BUSYFLAG_WAIT;
+ while (end.tv_usec > 1000000) {
+ end.tv_usec -= 1000000;
+ end.tv_sec++;
+ }
+ }
+
+ /* get the current time */
+ gettimeofday(&now, NULL);
+ if (now.tv_sec == end.tv_sec ? now.tv_usec >= end.tv_usec : now.tv_sec >= end.tv_sec) {
+ error("%s: timeout waiting for busy flag on controller %x (%x)", Name, ctrlmask, data);
+ if (++errors >= MAX_BUSYFLAG_ERRORS) {
+ error("%s: too many busy flag failures, turning off busy flag checking.", Name);
+ UseBusy = 0;
+ }
+ break;
+ }
+ }
+ }
+
+ /* RS=low, RW=low, EN=low */
+ if (Bits == 8) {
+ /* Lower EN */
+ drv_generic_parport_control(enable, 0);
+
+ /* Address hold time */
+ ndelay(T_AH);
+
+ drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, 0);
+ } else {
+ /* Lower EN */
+ drv_generic_parport_data(SIGNAL_RW);
+ ndelay(T_AH);
+ drv_generic_parport_data(0);
+ }
+
+ /* set data-lines to output */
+ drv_generic_parport_direction(0);
+ }
+ ctrlmask >>= 1;
+ }
+}
+
+
+static void drv_HD_PP_nibble(const unsigned char controller, const unsigned char nibble)
+{
+ unsigned char enable;
+
+ /* enable signal: 'controller' is a bitmask */
+ /* bit n .. send to controller #n */
+ /* so we can send a byte to more controllers at the same time! */
+ enable = 0;
+ if (controller & 0x01)
+ enable |= SIGNAL_ENABLE;
+ if (controller & 0x02)
+ enable |= SIGNAL_ENABLE2;
+ if (controller & 0x04)
+ enable |= SIGNAL_ENABLE3;
+ if (controller & 0x08)
+ enable |= SIGNAL_ENABLE4;
+
+ /* clear ENABLE */
+ /* put data on DB1..DB4 */
+ /* nibble already contains RS bit! */
+ drv_generic_parport_data(nibble);
+
+ /* Address set-up time */
+ ndelay(T_AS);
+
+ /* rise ENABLE */
+ drv_generic_parport_data(nibble | enable);
+
+ /* Enable pulse width */
+ ndelay(T_PW);
+
+ /* lower ENABLE */
+ drv_generic_parport_data(nibble);
+}
+
+
+static void drv_HD_PP_byte(const unsigned char controller, const unsigned char data, const unsigned char RS)
+{
+ /* send high nibble of the data */
+ drv_HD_PP_nibble(controller, ((data >> 4) & 0x0f) | RS);
+
+ /* Make sure we honour T_CYCLE */
+ ndelay(T_CYCLE - T_AS - T_PW);
+
+ /* send low nibble of the data */
+ drv_HD_PP_nibble(controller, (data & 0x0f) | RS);
+}
+
+
+static void drv_HD_PP_command(const unsigned char controller, const unsigned char cmd, const int delay)
+{
+ unsigned char enable;
+
+ if (UseBusy)
+ drv_HD_PP_busy(controller);
+
+ if (Bits == 8) {
+
+ /* enable signal: 'controller' is a bitmask */
+ /* bit n .. send to controller #n */
+ /* so we can send a byte to more controllers at the same time! */
+ enable = 0;
+ if (controller & 0x01)
+ enable |= SIGNAL_ENABLE;
+ if (controller & 0x02)
+ enable |= SIGNAL_ENABLE2;
+ if (controller & 0x04)
+ enable |= SIGNAL_ENABLE3;
+ if (controller & 0x08)
+ enable |= SIGNAL_ENABLE4;
+
+ /* put data on DB1..DB8 */
+ drv_generic_parport_data(cmd);
+
+ /* clear RW and RS */
+ drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, 0);
+
+ /* Address set-up time */
+ ndelay(T_AS);
+
+ /* send command */
+ drv_generic_parport_toggle(enable, 1, T_PW);
+
+ } else {
+
+ drv_HD_PP_byte(controller, cmd, 0);
+
+ }
+
+ /* wait for command completion */
+ if (!UseBusy)
+ udelay(delay);
+
+}
+
+
+static void drv_HD_PP_data(const unsigned char controller, const char *string, const int len, const int delay)
+{
+ int l = len;
+ unsigned char enable;
+
+ /* sanity check */
+ if (len <= 0)
+ return;
+
+ if (Bits == 8) {
+
+ /* enable signal: 'controller' is a bitmask */
+ /* bit n .. send to controller #n */
+ /* so we can send a byte to more controllers at the same time! */
+ enable = 0;
+ if (controller & 0x01)
+ enable |= SIGNAL_ENABLE;
+ if (controller & 0x02)
+ enable |= SIGNAL_ENABLE2;
+ if (controller & 0x04)
+ enable |= SIGNAL_ENABLE3;
+ if (controller & 0x08)
+ enable |= SIGNAL_ENABLE4;
+
+ if (!UseBusy) {
+ /* clear RW, set RS */
+ drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, SIGNAL_RS);
+ /* Address set-up time */
+ ndelay(T_AS);
+ }
+
+ while (l--) {
+
+ if (UseBusy) {
+ drv_HD_PP_busy(controller);
+ /* clear RW, set RS */
+ drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, SIGNAL_RS);
+ /* Address set-up time */
+ ndelay(T_AS);
+ }
+
+ /* put data on DB1..DB8 */
+ drv_generic_parport_data(*(string++));
+
+ /* send command */
+ drv_generic_parport_toggle(enable, 1, T_PW);
+
+ /* wait for command completion */
+ if (!UseBusy)
+ udelay(delay);
+ }
+
+ } else { /* 4 bit mode */
+
+ while (l--) {
+ if (UseBusy)
+ drv_HD_PP_busy(controller);
+
+ /* send data with RS enabled */
+ drv_HD_PP_byte(controller, *(string++), SIGNAL_RS);
+
+ /* wait for command completion */
+ if (!UseBusy)
+ udelay(delay);
+ }
+ }
+}
+
+
+static int drv_HD_PP_load(const char *section)
+{
+ if (cfg_number(section, "Bits", 8, 4, 8, &Bits) < 0)
+ return -1;
+
+ if (Bits != 4 && Bits != 8) {
+ error("%s: bad %s.Bits '%d' from %s, should be '4' or '8'", Name, section, Bits, cfg_source());
+ return -1;
+ }
+
+ /* LCM-162 only supports 8-bit-mode */
+ if (Capabilities & CAP_LCM162 && Bits != 8) {
+ error("%s: Model '%s' does not support %d bit mode!", Name, Models[Model].name, Bits);
+ Bits = 8;
+ }
+ info("%s: using %d bit mode", Name, Bits);
+
+ if (drv_generic_parport_open(section, Name) != 0) {
+ error("%s: could not initialize parallel port!", Name);
+ return -1;
+ }
+
+ /* Soft-Wiring */
+ if (Capabilities & CAP_LCM162) {
+ /* the LCM-162 is hardwired */
+ if ((SIGNAL_RS = drv_generic_parport_hardwire_ctrl("RS", "SLCTIN")) == 0xff)
+ return -1;
+ if ((SIGNAL_RW = drv_generic_parport_hardwire_ctrl("RW", "INIT")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE = drv_generic_parport_hardwire_ctrl("ENABLE", "AUTOFD")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE2 = drv_generic_parport_hardwire_ctrl("ENABLE2", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE3 = drv_generic_parport_hardwire_ctrl("ENABLE3", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE4 = drv_generic_parport_hardwire_ctrl("ENABLE4", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_BACKLIGHT = drv_generic_parport_hardwire_ctrl("BACKLIGHT", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_GPO = drv_generic_parport_hardwire_ctrl("GPO", "GND")) == 0xff)
+ return -1;
+ } else {
+ if (Bits == 8) {
+ if ((SIGNAL_RS = drv_generic_parport_wire_ctrl("RS", "AUTOFD")) == 0xff)
+ return -1;
+ if ((SIGNAL_RW = drv_generic_parport_wire_ctrl("RW", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE = drv_generic_parport_wire_ctrl("ENABLE", "STROBE")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE2 = drv_generic_parport_wire_ctrl("ENABLE2", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE3 = drv_generic_parport_wire_ctrl("ENABLE3", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE4 = drv_generic_parport_wire_ctrl("ENABLE4", "GND")) == 0xff)
+ return -1;
+ } else {
+ if ((SIGNAL_RS = drv_generic_parport_wire_data("RS", "DB4")) == 0xff)
+ return -1;
+ if ((SIGNAL_RW = drv_generic_parport_wire_data("RW", "DB5")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE = drv_generic_parport_wire_data("ENABLE", "DB6")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE2 = drv_generic_parport_wire_data("ENABLE2", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE3 = drv_generic_parport_wire_data("ENABLE3", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE4 = drv_generic_parport_wire_data("ENABLE4", "GND")) == 0xff)
+ return -1;
+ }
+ /* backlight and GPO are always control signals */
+ if ((SIGNAL_BACKLIGHT = drv_generic_parport_wire_ctrl("BACKLIGHT", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_GPO = drv_generic_parport_wire_ctrl("GPO", "GND")) == 0xff)
+ return -1;
+ }
+
+ /* clear capabilities if corresponding signal is GND */
+ if (SIGNAL_BACKLIGHT == 0) {
+ Capabilities &= ~CAP_BACKLIGHT;
+ }
+ if (SIGNAL_GPO == 0) {
+ Capabilities &= ~CAP_GPO;
+ }
+
+
+ /* clear all signals */
+ if (Bits == 8) {
+ drv_generic_parport_control(SIGNAL_RS |
+ SIGNAL_RW | SIGNAL_ENABLE | SIGNAL_ENABLE2 | SIGNAL_ENABLE3 | SIGNAL_ENABLE4 | SIGNAL_BACKLIGHT | SIGNAL_GPO, 0);
+ } else {
+ drv_generic_parport_data(0);
+ }
+
+ /* set direction: write */
+ drv_generic_parport_direction(0);
+
+ /* initialize *all* controllers */
+ if (Bits == 8) {
+ drv_HD_PP_command(allControllers, 0x30, T_INIT1); /* 8 Bit mode, wait 4.1 ms */
+ drv_HD_PP_command(allControllers, 0x30, T_INIT2); /* 8 Bit mode, wait 100 us */
+ drv_HD_PP_command(allControllers, 0x38, T_EXEC); /* 8 Bit mode, 1/16 duty cycle, 5x8 font */
+ } else {
+ drv_HD_PP_nibble(allControllers, 0x03);
+ udelay(T_INIT1); /* 4 Bit mode, wait 4.1 ms */
+ drv_HD_PP_nibble(allControllers, 0x03);
+ udelay(T_INIT2); /* 4 Bit mode, wait 100 us */
+ drv_HD_PP_nibble(allControllers, 0x03);
+ udelay(T_INIT1); /* 4 Bit mode, wait 4.1 ms */
+ drv_HD_PP_nibble(allControllers, 0x02);
+ udelay(T_INIT2); /* 4 Bit mode, wait 100 us */
+ drv_HD_PP_command(allControllers, 0x28, T_EXEC); /* 4 Bit mode, 1/16 duty cycle, 5x8 font */
+ }
+
+ /* maybe use busy-flag from now on */
+ /* (we can't use the busy flag during the init sequence) */
+ cfg_number(section, "UseBusy", 0, 0, 1, &UseBusy);
+
+ /* make sure we don't use the busy flag with RW wired to GND */
+ if (UseBusy && !SIGNAL_RW) {
+ error("%s: busy-flag checking is impossible with RW wired to GND!", Name);
+ UseBusy = 0;
+ }
+
+ /* make sure the display supports busy-flag checking in 4-Bit-Mode */
+ /* at the moment this is inly possible with Martin Hejl's gpio driver, */
+ /* which allows to use 4 bits as input and 4 bits as output */
+ if (UseBusy && Bits == 4 && !(Capabilities & CAP_BUSY4BIT)) {
+ error("%s: Model '%s' does not support busy-flag checking in 4 bit mode", Name, Models[Model].name);
+ UseBusy = 0;
+ }
+
+ info("%s: %susing busy-flag checking", Name, UseBusy ? "" : "not ");
+
+ /* The LCM-162 should really use BusyFlag checking */
+ if (!UseBusy && (Capabilities & CAP_LCM162)) {
+ error("%s: Model '%s' should definitely use busy-flag checking!", Name, Models[Model].name);
+ }
+
+ return 0;
+}
+
+
+static void drv_HD_PP_stop(void)
+{
+ /* clear all signals */
+ if (Bits == 8) {
+ drv_generic_parport_control(SIGNAL_RS |
+ SIGNAL_RW | SIGNAL_ENABLE | SIGNAL_ENABLE2 | SIGNAL_ENABLE3 | SIGNAL_ENABLE4 | SIGNAL_BACKLIGHT | SIGNAL_GPO, 0);
+ } else {
+ drv_generic_parport_data(0);
+ }
+
+ drv_generic_parport_close();
+
+}
+
+
+#ifdef WITH_I2C
+
+/****************************************/
+/*** i2c dependant functions ***/
+/****************************************/
+
+ /*
+ DISCLAIMER!!!!
+
+ The following code is WORK IN PROGRESS, since it basicly 'works for us...'
+
+ (C) 2005 Paul Kamphuis & Luis Correia
+
+ We have removed all of the delays from this code, as the I2C bus is slow enough...
+ (maximum possible speed is 100KHz only)
+
+ */
+
+static void drv_HD_I2C_nibble(unsigned char controller, unsigned char nibble)
+{
+ unsigned char enable;
+ unsigned char command; /* this is actually the first data byte on the PCF8574 */
+ unsigned char data_block[2];
+ /* enable signal: 'controller' is a bitmask */
+ /* bit n .. send to controller #n */
+ /* so we can send a byte to more controllers at the same time! */
+ enable = 0;
+ if (controller & 0x01)
+ enable |= SIGNAL_ENABLE;
+ if (controller & 0x02)
+ enable |= SIGNAL_ENABLE2;
+ if (controller & 0x04)
+ enable |= SIGNAL_ENABLE3;
+ if (controller & 0x08)
+ enable |= SIGNAL_ENABLE4;
+
+ /*
+ The new method Paul Kamphuis has concocted places the 3 needed writes to the I2C device
+ as a single operation, using the 'i2c_smbus_write_block_data' function.
+ These actual writes are performed by putting the nibble along with the 'EN' signal.
+
+ command = first byte to be written, which contains the nibble (DB0..DB3)
+ data [0] = second byte to be written, which contains the nibble plus the EN signal
+ data [1] = third byte to be written, which contains the nibble (DB0..DB3)
+
+ Then we write the block as a whole.
+
+ The main advantage we see is that we do 2 less IOCTL's from our driver.
+ */
+
+ command = nibble;
+ data_block[0] = nibble | enable;
+ data_block[1] = nibble;
+
+ drv_generic_i2c_command(command,data_block,2);
+}
+
+
+static void drv_HD_I2C_byte(const unsigned char controller, const unsigned char data)
+{
+ /* send data with RS enabled */
+ drv_HD_I2C_nibble(controller, ((data >> 4) & 0x0f) | SIGNAL_RS);
+ drv_HD_I2C_nibble(controller, (data & 0x0f) | SIGNAL_RS);
+}
+
+
+static void drv_HD_I2C_command(const unsigned char controller, const unsigned char cmd, __attribute__ ((unused))const int delay)
+{
+ /* send data with RS disabled */
+ drv_HD_I2C_nibble(controller, ((cmd >> 4) & 0x0f));
+ drv_HD_I2C_nibble(controller, ((cmd) & 0x0f));
+}
+
+static void drv_HD_I2C_data(const unsigned char controller, const char *string, const int len, __attribute__ ((unused)) const int delay)
+{
+ int l = len;
+
+ /* sanity check */
+ if (len <= 0)
+ return;
+
+ while (l--) {
+ drv_HD_I2C_byte(controller, *(string++));
+ }
+}
+
+
+static int drv_HD_I2C_load(const char *section)
+{
+ if (cfg_number(section, "Bits", 8, 4, 8, &Bits) < 0)
+ return -1;
+ if (Bits != 4) {
+ error("%s: bad %s.Bits '%d' from %s, should be '4'", Name, section, Bits, cfg_source());
+ return -1;
+ }
+
+ info("%s: using %d bit mode", Name, Bits);
+
+ if (drv_generic_i2c_open(section, Name) != 0) {
+ error("%s: could not initialize i2c attached device!", Name);
+ return -1;
+ }
+
+ if ((SIGNAL_RS = drv_generic_i2c_wire("RS", "DB4")) == 0xff)
+ return -1;
+ if ((SIGNAL_RW = drv_generic_i2c_wire("RW", "DB5")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE = drv_generic_i2c_wire("ENABLE", "DB6")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE2 = drv_generic_i2c_wire("ENABLE2", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_GPO = drv_generic_i2c_wire("GPO", "GND")) == 0xff)
+ return -1;
+
+ /* initialize display */
+ drv_HD_I2C_nibble(allControllers, 0x03);
+ udelay(T_INIT1); /* 4 Bit mode, wait 4.1 ms */
+ drv_HD_I2C_nibble(allControllers, 0x03);
+ udelay(T_INIT2); /* 4 Bit mode, wait 100 us */
+ drv_HD_I2C_nibble(allControllers, 0x03);
+ udelay(T_INIT2); /* 4 Bit mode, wait 4.1 ms */
+ drv_HD_I2C_nibble(allControllers, 0x02);
+ udelay(T_INIT2); /* 4 Bit mode, wait 100 us */
+ drv_HD_I2C_command(allControllers, 0x28, T_EXEC); /* 4 Bit mode, 1/16 duty cycle, 5x8 font */
+
+ info("%s: I2C initialization done", Name);
+
+ return 0;
+}
+
+
+static void drv_HD_I2C_stop(void)
+{
+ /* clear all signals */
+ drv_generic_i2c_data(0);
+
+ /* close port */
+ drv_generic_i2c_close();
+}
+
+/* END OF DISCLAIMER */
+
+#endif /* WITH_I2C */
+
+
+/****************************************/
+/*** display dependant functions ***/
+/****************************************/
+
+static void drv_HD_clear(void)
+{
+ drv_HD_command(allControllers, 0x01, T_CLEAR); /* clear *all* displays */
+}
+
+
+static int drv_HD_goto(int row, int col)
+{
+ int pos, controller;
+
+ /* handle multiple controllers */
+ for (pos = 0, controller = 0; controller < numControllers; controller++) {
+ pos += CROWS[controller];
+ if (row < pos) {
+ currController = (1 << controller);
+ break;
+ }
+ row -= CROWS[controller];
+ }
+
+ /* column outside of current display's width */
+ if (col >= CCOLS[controller])
+ return -1;
+
+ if (0) {
+ debug("goto: [%d,%d] mask=%d, controller=%d, size:%dx%d", row, col, currController, controller, CROWS[controller], CCOLS[controller]);
+ }
+
+ /* 16x1 Displays are organized as 8x2 :-( */
+ if (CCOLS[controller] == 16 && CROWS[controller] == 1 && col > 7) {
+ row++;
+ col -= 8;
+ }
+
+ if (Capabilities & CAP_HD66712) {
+ /* the HD66712 doesn't have a braindamadged RAM layout */
+ pos = row * 32 + col;
+ } else {
+ /* 16x4 Controllers use a slightly different layout */
+ if (CCOLS[controller] == 16 && CROWS[controller] == 4) {
+ pos = (row % 2) * 64 + (row / 2) * 16 + col;
+ } else {
+ pos = (row % 2) * 64 + (row / 2) * 20 + col;
+ }
+ }
+ drv_HD_command(currController, (0x80 | pos), T_EXEC);
+
+ /* return columns left on current display */
+ return CCOLS[controller] - col;
+
+}
+
+
+static void drv_HD_write(const int row, const int col, const char *data, const int len)
+{
+ int space = drv_HD_goto(row, col);
+ if (space > 0) {
+ drv_HD_data(currController, data, len > space ? space : len, T_EXEC);
+ }
+}
+
+
+static void drv_HD_defchar(const int ascii, const unsigned char *matrix)
+{
+ int i;
+ char buffer[8];
+
+ for (i = 0; i < 8; i++) {
+ buffer[i] = matrix[i] & 0x1f;
+ }
+
+ /* define chars on *all* controllers! */
+ drv_HD_command(allControllers, 0x40 | 8 * ascii, T_EXEC);
+ drv_HD_data(allControllers, buffer, 8, T_WRCG);
+}
+
+
+static int drv_HD_backlight(int backlight)
+{
+ if (!(Capabilities & CAP_BACKLIGHT))
+ return -1;
+
+ if (backlight < 0)
+ backlight = 0;
+ if (backlight > 1)
+ backlight = 1;
+
+ drv_generic_parport_control(SIGNAL_BACKLIGHT, backlight ? SIGNAL_BACKLIGHT : 0);
+
+ return backlight;
+}
+
+
+static int drv_HD_brightness(int brightness)
+{
+ char cmd;
+
+ if (!(Capabilities & CAP_BRIGHTNESS))
+ return -1;
+
+ if (brightness < 0)
+ brightness = 0;
+ if (brightness > 3)
+ brightness = 3;
+
+ cmd = '0' + brightness;
+
+ drv_HD_command(allControllers, 0x38, T_EXEC); /* enable function */
+ drv_HD_data(allControllers, &cmd, 1, T_WRCG); /* set brightness */
+
+ return brightness;
+}
+
+
+/* Fixme: GPO's */
+#if 0
+static void drv_HD_setGPO(const int bits)
+{
+ if (Lcd.gpos > 0) {
+
+ /* put data on DB1..DB8 */
+ drv_generic_parport_data(bits);
+
+ /* 74HCT573 set-up time */
+ ndelay(20);
+
+ /* send data */
+ /* 74HCT573 enable pulse width = 24ns */
+ drv_generic_parport_toggle(SIGNAL_GPO, 1, 230);
+ }
+}
+#endif
+
+
+static void drv_HD_LCM162_timer(void __attribute__ ((unused)) * notused)
+{
+ static unsigned char data = 0x00;
+
+ /* Bit 3+5 : key number */
+ /* Bit 6 : key press/release */
+ unsigned char mask3 = 1 << 3;
+ unsigned char mask5 = 1 << 5;
+ unsigned char mask6 = 1 << 6;
+ unsigned char mask = mask3 | mask5 | mask6;
+
+ int keynum;
+ int updown;
+
+ unsigned char temp;
+
+ temp = drv_generic_parport_status() & mask;
+
+ if (data != temp) {
+ data = temp;
+
+ keynum = (data & mask3 ? 1 : 0) + (data & mask5 ? 2 : 0);
+ updown = (data & mask6 ? 1 : 0);
+
+ debug("key %d press %d", keynum, updown);
+ }
+}
+
+
+static int drv_HD_start(const char *section, const int quiet)
+{
+ char *model, *size, *bus;
+ int rows = -1, cols = -1, gpos = -1, i;
+ int size_defined = 0;
+ int size_missing = 0;
+
+ model = cfg_get(section, "Model", "generic");
+ if (model != NULL && *model != '\0') {
+ int i;
+ for (i = 0; Models[i].type != 0xff; i++) {
+ if (strcasecmp(Models[i].name, model) == 0)
+ break;
+ }
+ if (Models[i].type == 0xff) {
+ error("%s: %s.Model '%s' is unknown from %s", Name, section, model, cfg_source());
+ return -1;
+ }
+ Model = i;
+ Capabilities = Models[Model].capabilities;
+ info("%s: using model '%s'", Name, Models[Model].name);
+ } else {
+ error("%s: empty '%s.Model' entry from %s", Name, section, cfg_source());
+ if (model)
+ free(model);
+ return -1;
+ }
+ free(model);
+
+ bus = cfg_get(section, "Bus", "parport");
+ if (bus == NULL && *bus == '\0') {
+ error("%s: empty '%s.Bus' entry from %s", Name, section, cfg_source());
+ if (bus)
+ free(bus);
+ return -1;
+ }
+
+ if (strcasecmp(bus, "parport") == 0) {
+ info("%s: using parallel port", Name);
+ Bus = BUS_PP;
+ drv_HD_load = drv_HD_PP_load;
+ drv_HD_command = drv_HD_PP_command;
+ drv_HD_data = drv_HD_PP_data;
+ drv_HD_stop = drv_HD_PP_stop;
+
+ } else if (strcasecmp(bus, "i2c") == 0) {
+#ifdef WITH_I2C
+ info("%s: using I2C bus", Name);
+ Bus = BUS_I2C;
+ drv_HD_load = drv_HD_I2C_load;
+ drv_HD_command = drv_HD_I2C_command;
+ drv_HD_data = drv_HD_I2C_data;
+ drv_HD_stop = drv_HD_I2C_stop;
+#else
+ error("%s: %s.Bus '%s' from %s not available:", Name, section, bus, cfg_source());
+ error("%s: lcd4linux was compiled without i2c support!", Name);
+ free(bus);
+ return -1;
+#endif
+
+ } else {
+ error("%s: bad %s.Bus '%s' from %s, should be 'parport' or 'i2c'", Name, section, bus, cfg_source());
+ free(bus);
+ return -1;
+ }
+
+ /* sanity check: Model can use bus */
+ if (!(Capabilities & Bus)) {
+ error("%s: Model '%s' cannot be used on the %s bus!", Name, Models[Model].name, bus);
+ free(bus);
+ return -1;
+ }
+ free(bus);
+
+ if (cfg_number(section, "Controllers", 1, 1, 4, (int *) &numControllers) < 0)
+ return -1;
+ info("%s: using %d Controller(s)", Name, numControllers);
+
+ /* current Controller */
+ currController = 1;
+
+ /* Bitmask for *all* Controllers */
+ allControllers = (1 << numControllers) - 1;
+
+
+ DCOLS = 0;
+ DROWS = 0;
+
+ for (i = 0; i < numControllers; i++) {
+ char key[6];
+ qprintf(key, sizeof(key), "Size%d", i + 1);
+ size = cfg_get(section, key, NULL);
+ if (size == NULL || *size == '\0') {
+ size_missing++;
+ free(size);
+ continue;
+ }
+ if (sscanf(size, "%dx%d", &cols, &rows) != 2 || rows < 1 || cols < 1) {
+ error("%s: bad %s.%s '%s' from %s", Name, section, key, size, cfg_source());
+ free(size);
+ return -1;
+ }
+ free(size);
+ CCOLS[i] = cols;
+ CROWS[i] = rows;
+ size_defined++;
+ info("%s: Controller %d: %dx%d", Name, i + 1, cols, rows);
+ /* grow the size */
+ if (cols > DCOLS)
+ DCOLS = cols;
+ DROWS += rows;
+ }
+ if (size_defined && size_missing) {
+ error("%s: bad %s.Size* definition in %s:", Name, section, cfg_source());
+ error("%s: either you specify the size for *all* controllers or for none.", Name);
+ return -1;
+ }
+
+ size = cfg_get(section, "Size", NULL);
+ if (size != NULL && *size != '\0') {
+ if (sscanf(size, "%dx%d", &cols, &rows) != 2 || rows < 1 || cols < 1) {
+ error("%s: bad %s.Size '%s' from %s", Name, section, size, cfg_source());
+ free(size);
+ return -1;
+ }
+ if (DCOLS == 0 && DROWS == 0) {
+ for (i = 0; i < numControllers; i++) {
+ CCOLS[i] = cols;
+ CROWS[i] = rows / numControllers;
+ DCOLS = CCOLS[i];
+ DROWS += CROWS[i];
+ }
+ }
+ if (rows != DROWS || cols != DCOLS) {
+ error("%s: bad %s.Size definition in %s:", Name, section, cfg_source());
+ error("%s: Size %dx%d should be %dx%d", Name, cols, rows, DCOLS, DROWS);
+ return -1;
+ }
+ }
+ free(size);
+
+
+ if (cfg_number(section, "GPOs", 0, 0, 8, &gpos) < 0)
+ return -1;
+ if (gpos > 0 && !(Capabilities & CAP_GPO)) {
+ error("%s: Model '%s' does not support GPO's!", Name, Models[Model].name);
+ gpos = 0;
+ }
+ GPOS = gpos;
+ if (gpos > 0) {
+ info("%s: using %d GPO's", Name, GPOS);
+ }
+
+ if (drv_HD_load(section) < 0) {
+ error("%s: start display failed!", Name);
+ return -1;
+ }
+
+ drv_HD_command(allControllers, 0x08, T_EXEC); /* Controller off, cursor off, blink off */
+ drv_HD_command(allControllers, 0x0c, T_CLEAR); /* Display on, cursor off, blink off, wait 1.64 ms */
+ drv_HD_command(allControllers, 0x06, T_EXEC); /* curser moves to right, no shift */
+
+ if ((Capabilities & CAP_HD66712) && DROWS > 2) {
+ drv_HD_command(allControllers, Bits == 8 ? 0x3c : 0x2c, T_EXEC); /* set extended register enable bit */
+ drv_HD_command(allControllers, 0x09, T_EXEC); /* set 4-line mode */
+ drv_HD_command(allControllers, Bits == 8 ? 0x38 : 0x28, T_EXEC); /* clear extended register enable bit */
+ }
+
+ drv_HD_clear(); /* clear *all* displays */
+ drv_HD_command(allControllers, 0x03, T_CLEAR); /* return home */
+
+ /* maybe set backlight */
+ if (Capabilities & CAP_BACKLIGHT) {
+ int backlight;
+ if (cfg_number(section, "Backlight", 0, 0, 1, &backlight) > 0) {
+ info("%s: backlight %s", Name, backlight ? "enabled" : "disabled");
+ drv_HD_backlight(backlight);
+ }
+ }
+
+ /* maybe set brightness */
+ if (Capabilities & CAP_BRIGHTNESS) {
+ int brightness;
+ if (cfg_number(section, "Brightness", 0, 0, 3, &brightness) > 0) {
+ info("%s: brightness level %d", Name, brightness);
+ drv_HD_brightness(brightness);
+ }
+ }
+
+ /* install keypad polling timer for LCM-162 */
+ if (Capabilities & CAP_LCM162) {
+ timer_add(drv_HD_LCM162_timer, NULL, 10, 0);
+ }
+
+ if (!quiet) {
+ char buffer[40];
+ qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS);
+ if (drv_generic_text_greet(buffer, NULL)) {
+ sleep(3);
+ drv_HD_clear();
+ }
+ }
+
+ return 0;
+}
+
+
+/****************************************/
+/*** plugins ***/
+/****************************************/
+
+
+static void plugin_backlight(RESULT * result, RESULT * arg1)
+{
+ double backlight;
+
+ backlight = drv_HD_backlight(R2N(arg1));
+ SetResult(&result, R_NUMBER, &backlight);
+}
+
+
+static void plugin_brightness(RESULT * result, RESULT * arg1)
+{
+ double brightness;
+
+ brightness = drv_HD_brightness(R2N(arg1));
+ SetResult(&result, R_NUMBER, &brightness);
+}
+
+
+/****************************************/
+/*** widget callbacks ***/
+/****************************************/
+
+
+/* using drv_generic_text_draw(W) */
+/* using drv_generic_text_icon_draw(W) */
+/* using drv_generic_text_bar_draw(W) */
+
+
+/****************************************/
+/*** exported functions ***/
+/****************************************/
+
+
+/* list models */
+int drv_HD_list(void)
+{
+ int i;
+
+ for (i = 0; Models[i].type != 0xff; i++) {
+ printf("%s ", Models[i].name);
+ }
+ return 0;
+}
+
+
+/* initialize driver & display */
+int drv_HD_init(const char *section, const int quiet)
+{
+ WIDGET_CLASS wc;
+ int asc255bug;
+ int ret;
+
+ /* display preferences */
+ XRES = 5; /* pixel width of one char */
+ YRES = 8; /* pixel height of one char */
+ CHARS = 8; /* number of user-defineable characters */
+ CHAR0 = 0; /* ASCII of first user-defineable char */
+ GOTO_COST = 1; /* number of bytes a goto command requires */
+
+ /* real worker functions */
+ drv_generic_text_real_write = drv_HD_write;
+ drv_generic_text_real_defchar = drv_HD_defchar;
+
+
+ /* start display */
+ if ((ret = drv_HD_start(section, quiet)) != 0)
+ return ret;
+
+ /* initialize generic text driver */
+ if ((ret = drv_generic_text_init(section, Name)) != 0)
+ return ret;
+
+ /* initialize generic icon driver */
+ if ((ret = drv_generic_text_icon_init()) != 0)
+ return ret;
+
+ /* initialize generic bar driver */
+ if ((ret = drv_generic_text_bar_init(0)) != 0)
+ return ret;
+
+ /* add fixed chars to the bar driver */
+ /* most displays have a full block on ascii 255, but some have kind of */
+ /* an 'inverted P'. If you specify 'asc255bug 1 in the config, this */
+ /* char will not be used, but rendered by the bar driver */
+ cfg_number(section, "asc255bug", 0, 0, 1, &asc255bug);
+ drv_generic_text_bar_add_segment(0, 0, 255, 32); /* ASCII 32 = blank */
+ if (!asc255bug)
+ drv_generic_text_bar_add_segment(255, 255, 255, 255); /* ASCII 255 = block */
+
+ /* register text widget */
+ wc = Widget_Text;
+ wc.draw = drv_generic_text_draw;
+ widget_register(&wc);
+
+ /* register icon widget */
+ wc = Widget_Icon;
+ wc.draw = drv_generic_text_icon_draw;
+ widget_register(&wc);
+
+ /* register bar widget */
+ wc = Widget_Bar;
+ wc.draw = drv_generic_text_bar_draw;
+ widget_register(&wc);
+
+ /* register plugins */
+ if (Capabilities & CAP_BACKLIGHT) {
+ AddFunction("LCD::backlight", 1, plugin_backlight);
+ }
+ if (Capabilities & CAP_BRIGHTNESS) {
+ AddFunction("LCD::brightness", 1, plugin_brightness);
+ }
+
+ return 0;
+}
+
+
+/* close driver & display */
+int drv_HD_quit(const int quiet)
+{
+
+ info("%s: shutting down.", Name);
+
+ drv_generic_text_quit();
+
+ /* clear display */
+ drv_HD_clear();
+
+ /* say goodbye... */
+ if (!quiet) {
+ drv_generic_text_greet("goodbye!", NULL);
+ }
+
+ drv_HD_stop();
+
+ return (0);
+}
+
+
+DRIVER drv_HD44780 = {
+ name:Name,
+ list:drv_HD_list,
+ init:drv_HD_init,
+ quit:drv_HD_quit,
+};
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-15 23:26:06 +0000