diff options
Diffstat (limited to 'drv_HD44780.c')
| -rw-r--r-- | drv_HD44780.c | 309 |
1 files changed, 55 insertions, 254 deletions
diff --git a/drv_HD44780.c b/drv_HD44780.c index a838044..a8c5424 100644 --- a/drv_HD44780.c +++ b/drv_HD44780.c @@ -1,4 +1,5 @@ -/* $Id: drv_HD44780.c,v 1.64 2006/08/10 20:40:46 reinelt Exp $ +/* $Id: drv_HD44780.c 741 2007-01-17 05:56:27Z michael $ + * $URL: https://ssl.bulix.org/svn/lcd4linux/branches/0.10.1/drv_HD44780.c $ * * new style driver for HD44780-based displays * @@ -30,251 +31,6 @@ * 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 1.64 2006/08/10 20:40:46 reinelt - * M50530 enhancements: Timings, busy-flag checking - * - * Revision 1.63 2006/07/29 20:59:12 lfcorreia - * Fix wrong timing at I2C initialization - * - * Revision 1.62 2006/01/30 06:25:49 reinelt - * added CVS Revision - * - * Revision 1.61 2006/01/05 19:27:26 reinelt - * HD44780 power supply from parport - * - * Revision 1.60 2006/01/05 18:56:57 reinelt - * more GPO stuff - * - * Revision 1.59 2006/01/03 06:13:44 reinelt - * GPIO's for MatrixOrbital - * - * Revision 1.58 2005/12/20 07:07:44 reinelt - * further work on GPO's, HD44780 GPO support - * - * Revision 1.57 2005/12/12 09:08:08 reinelt - * finally removed old udelay code path; read timing values from config - * - * Revision 1.56 2005/12/12 05:52:03 reinelt - * type of delays is 'unsigned long' - * - * Revision 1.55 2005/10/02 07:58:48 reinelt - * HD44780 address setup time increased - * - * Revision 1.54 2005/06/09 17:41:47 reinelt - * M50530 fixes (many thanks to Szymon Bieganski) - * - * 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 - * */ /* @@ -310,7 +66,10 @@ #include "drv.h" #include "drv_generic_text.h" #include "drv_generic_gpio.h" + +#ifdef WITH_PARPORT #include "drv_generic_parport.h" +#endif #ifdef WITH_I2C #include "drv_generic_i2c.h" @@ -324,10 +83,13 @@ static int Capabilities; /* Timings */ +#ifdef WITH_PARPORT static int T_CY, T_PW, T_AS, T_AH; -static int T_POWER, T_INIT1, T_INIT2, T_EXEC, T_WRCG, T_CLEAR, T_HOME, T_ONOFF; -static int T_GPO_ST, T_GPO_PW; -static int T_POWER; +#endif +static int T_INIT1, T_INIT2, T_EXEC, T_WRCG, T_CLEAR, T_HOME, T_ONOFF; +#ifdef WITH_PARPORT +static int T_POWER, T_GPO_ST, T_GPO_PW; +#endif static int Bits = 0; static int numControllers = 0; @@ -344,9 +106,12 @@ 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; +#ifdef WITH_PARPORT +static unsigned char SIGNAL_BACKLIGHT; static unsigned char SIGNAL_POWER; +#endif /* maximum time to wait for the busy-flag (in usec) */ #define MAX_BUSYFLAG_WAIT 10000 @@ -355,11 +120,14 @@ static unsigned char SIGNAL_POWER; #define MAX_BUSYFLAG_ERRORS 20 /* flag for busy-waiting vs. busy flag checking */ +#ifdef WITH_PARPORT static int UseBusy = 0; +#endif /* buffer holding the GPO state */ +#ifdef WITH_PARPORT static unsigned char GPO = 0; - +#endif typedef struct { int type; @@ -406,6 +174,8 @@ static void (*drv_HD_stop) (void); /*** parport dependant functions ***/ /****************************************/ +#ifdef WITH_PARPORT + static void drv_HD_PP_busy(const int controller) { static unsigned int errors = 0; @@ -902,6 +672,8 @@ static void drv_HD_PP_stop(void) } +#endif + #ifdef WITH_I2C @@ -1132,6 +904,8 @@ static void drv_HD_defchar(const int ascii, const unsigned char *matrix) } +#ifdef WITH_PARPORT + static int drv_HD_backlight(int backlight) { if (!(Capabilities & CAP_BACKLIGHT)) @@ -1147,6 +921,8 @@ static int drv_HD_backlight(int backlight) return backlight; } +#endif + static int drv_HD_brightness(int brightness) { @@ -1169,6 +945,8 @@ static int drv_HD_brightness(int brightness) } +#ifdef WITH_PARPORT + static int drv_HD_GPO(const int num, const int val) { int v; @@ -1196,6 +974,10 @@ static int drv_HD_GPO(const int num, const int val) return v; } +#endif + + +#ifdef WITH_PARPORT static void drv_HD_LCM162_timer(void __attribute__ ((unused)) * notused) { @@ -1225,6 +1007,8 @@ static void drv_HD_LCM162_timer(void __attribute__ ((unused)) * notused) } } +#endif + static int drv_HD_start(const char *section, const int quiet) { @@ -1262,14 +1046,23 @@ static int drv_HD_start(const char *section, const int quiet) } if (strcasecmp(bus, "parport") == 0) { + +#ifdef WITH_PARPORT 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 + error("%s: %s.Bus '%s' from %s not available:", Name, section, bus, cfg_source()); + error("%s: lcd4linux was compiled without parport support!", Name); + free(bus); + return -1; +#endif } else if (strcasecmp(bus, "i2c") == 0) { + #ifdef WITH_I2C info("%s: using I2C bus", Name); Bus = BUS_I2C; @@ -1396,6 +1189,7 @@ static int drv_HD_start(const char *section, const int quiet) drv_HD_command(allControllers, 0x03, T_HOME); /* return home */ /* maybe set backlight */ +#ifdef WITH_PARPORT if (Capabilities & CAP_BACKLIGHT) { int backlight; if (cfg_number(section, "Backlight", 0, 0, 1, &backlight) > 0) { @@ -1403,6 +1197,7 @@ static int drv_HD_start(const char *section, const int quiet) drv_HD_backlight(backlight); } } +#endif /* maybe set brightness */ if (Capabilities & CAP_BRIGHTNESS) { @@ -1414,9 +1209,11 @@ static int drv_HD_start(const char *section, const int quiet) } /* install keypad polling timer for LCM-162 */ +#ifdef WITH_PARPORT if (Capabilities & CAP_LCM162) { timer_add(drv_HD_LCM162_timer, NULL, 10, 0); } +#endif if (!quiet) { char buffer[40]; @@ -1436,6 +1233,7 @@ static int drv_HD_start(const char *section, const int quiet) /****************************************/ +#ifdef WITH_PARPORT static void plugin_backlight(RESULT * result, RESULT * arg1) { double backlight; @@ -1443,7 +1241,7 @@ static void plugin_backlight(RESULT * result, RESULT * arg1) backlight = drv_HD_backlight(R2N(arg1)); SetResult(&result, R_NUMBER, &backlight); } - +#endif static void plugin_brightness(RESULT * result, RESULT * arg1) { @@ -1489,7 +1287,7 @@ int drv_HD_init(const char *section, const int quiet) int asc255bug; int ret; - info("%s: %s", Name, "$Revision: 1.64 $"); + info("%s: %s", Name, "$Rev: 741 $"); /* display preferences */ XRES = 5; /* pixel width of one char */ @@ -1501,8 +1299,9 @@ int drv_HD_init(const char *section, const int quiet) /* real worker functions */ drv_generic_text_real_write = drv_HD_write; drv_generic_text_real_defchar = drv_HD_defchar; +#ifdef WITH_PARPORT drv_generic_gpio_real_set = drv_HD_GPO; - +#endif /* start display */ if ((ret = drv_HD_start(section, quiet)) != 0) @@ -1549,9 +1348,11 @@ int drv_HD_init(const char *section, const int quiet) widget_register(&wc); /* register plugins */ +#ifdef WITH_PARPORT if (Capabilities & CAP_BACKLIGHT) { AddFunction("LCD::backlight", 1, plugin_backlight); } +#endif if (Capabilities & CAP_BRIGHTNESS) { AddFunction("LCD::brightness", 1, plugin_brightness); } |