diff options
| -rw-r--r-- | HD44780.c | 496 | ||||
| -rw-r--r-- | Makefile.am | 1 | ||||
| -rw-r--r-- | Makefile.in | 13 | ||||
| -rw-r--r-- | MatrixOrbital.c | 17 | ||||
| -rw-r--r-- | display.c | 8 | ||||
| -rw-r--r-- | lcd4linux.conf.sample | 24 |
6 files changed, 535 insertions, 24 deletions
diff --git a/HD44780.c b/HD44780.c new file mode 100644 index 0000000..cdea5bf --- /dev/null +++ b/HD44780.c @@ -0,0 +1,496 @@ +/* $Id: HD44780.c,v 1.1 2000/04/12 08:05:45 reinelt Exp $ + * + * driver for display modules based on the HD44780 chip + * + * Copyright 1999, 2000 by Michael Reinelt (reinelt@eunet.at) + * + * This program 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. + * + * This program 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: HD44780.c,v $ + * Revision 1.1 2000/04/12 08:05:45 reinelt + * + * first version of the HD44780 driver + * + */ + +/* + * + * exported fuctions: + * + * struct LCD HD44780[] + * + */ + +#include <stdlib.h> +#include <stdio.h> +#include <unistd.h> +#include <signal.h> +#include <errno.h> +#include <asm/io.h> + +#include "cfg.h" +#include "display.h" + +#define XRES 5 +#define YRES 8 +#define CHARS 8 +#define BARS ( BAR_L | BAR_R | BAR_U | BAR_D | BAR_H2 ) + +static LCD Lcd; + +typedef struct { + int len1; + int len2; + int type; + int segment; +} BAR; + +typedef struct { + int len1; + int len2; + int type; + int used; + int ascii; +} SEGMENT; + +static unsigned short Port=0; + +static char Txt[4][40]; +static BAR Bar[4][40]; + +static int nSegment=2; +static SEGMENT Segment[128] = {{ len1:0, len2:0, type:255, used:0, ascii:32 }, + { len1:255, len2:255, type:255, used:0, ascii:255 }}; + + +static void HD_delay (unsigned long usec) +{ + usleep(usec); +} + +static void HD_command (unsigned char cmd) +{ + outb (cmd, Port); // put data on DB1..DB8 + outb (0x02, Port+2); // set Enable = bit 0 invertet + HD_delay(1); + outb (0x03, Port+2); // clear Enable +} + +static void HD_write (char *string, int len) +{ + while (len--) { + outb (*string++, Port); // put data on DB1..DB8 + outb (0x00, Port+2); // set Enable = bit 0 invertet + HD_delay(1); + outb (0x01, Port+2); // clear Enable + HD_delay(40); + } +} + +static int HD_open (void) +{ + if (ioperm(Port, 3, 1)!=0) { + fprintf (stderr, "HD44780: ioperm() failed: %s\n", strerror(errno)); + return -1; + } + + HD_command (0x30); // 8 Bit mode + HD_delay (4100); // wait 4.1 ms + HD_command (0x30); // 8 Bit mode + HD_delay (100); // wait 100 us + HD_command (0x30); // 8 Bit mode + HD_delay (4100); // wait 4.1 ms + HD_command (0x38); // 8 Bit mode, 1/16 duty cycle, 5x8 font + HD_delay (40); // wait 40 us + HD_command (0x08); // Display off, cursor off, blink off + HD_delay (40); // wait 40 us + HD_command (0x0c); // Display on, cursor off, blink off + HD_delay (1640); // wait 1.64 ms + HD_command (0x06); // curser moves to right, no shift + HD_delay (40); // wait 40 us + + return 0; +} + +static void HD_process_bars (void) +{ + int row, col; + int i, j; + + for (i=2; i<nSegment && Segment[i].used; i++); + for (j=i+1; j<nSegment; j++) { + if (Segment[j].used) + Segment[i++]=Segment[j]; + } + nSegment=i; + + for (row=0; row<Lcd.rows; row++) { + for (col=0; col<Lcd.cols; col++) { + if (Bar[row][col].type==0) continue; + for (i=0; i<nSegment; i++) { + if (Segment[i].type & Bar[row][col].type && + Segment[i].len1== Bar[row][col].len1 && + Segment[i].len2== Bar[row][col].len2) break; + } + if (i==nSegment) { + nSegment++; + Segment[i].len1=Bar[row][col].len1; + Segment[i].len2=Bar[row][col].len2; + Segment[i].type=Bar[row][col].type; + Segment[i].used=0; + Segment[i].ascii=-1; + } + Bar[row][col].segment=i; + } + } +} + +static int HD_segment_diff (int i, int j) +{ + int RES; + int i1, i2, j1, j2; + + if (i==j) return 65535; + if (!(Segment[i].type & Segment[j].type)) return 65535; + if (Segment[i].len1==0 && Segment[j].len1!=0) return 65535; + if (Segment[i].len2==0 && Segment[j].len2!=0) return 65535; + RES=Segment[i].type & BAR_H ? XRES:YRES; + if (Segment[i].len1>=RES && Segment[j].len1<RES) return 65535; + if (Segment[i].len2>=RES && Segment[j].len2<RES) return 65535; + if (Segment[i].len1==Segment[i].len2 && Segment[j].len1!=Segment[j].len2) return 65535; + + i1=Segment[i].len1; if (i1>RES) i1=RES; + i2=Segment[i].len2; if (i2>RES) i2=RES; + j1=Segment[j].len1; if (j1>RES) i1=RES; + j2=Segment[j].len2; if (j2>RES) i2=RES; + + return (i1-i2)*(i1-i2)+(j1-j2)*(j1-j2); +} + +static void HD_compact_bars (void) +{ + int i, j, r, c, min; + int pack_i, pack_j; + int pass1=1; + int error[nSegment][nSegment]; + + if (nSegment>CHARS+2) { + + for (i=2; i<nSegment; i++) { + for (j=0; j<nSegment; j++) { + error[i][j]=HD_segment_diff(i,j); + } + } + + while (nSegment>CHARS+2) { + min=65535; + pack_i=-1; + pack_j=-1; + for (i=2; i<nSegment; i++) { + if (pass1 && Segment[i].used) continue; + for (j=0; j<nSegment; j++) { + if (error[i][j]<min) { + min=error[i][j]; + pack_i=i; + pack_j=j; + } + } + } + if (pack_i==-1) { + if (pass1) { + pass1=0; + continue; + } else { + fprintf (stderr, "HD44780: unable to compact bar characters\n"); + nSegment=CHARS; + break; + } + } + + nSegment--; + Segment[pack_i]=Segment[nSegment]; + + for (i=0; i<nSegment; i++) { + error[pack_i][i]=error[nSegment][i]; + error[i][pack_i]=error[i][nSegment]; + } + + for (r=0; r<Lcd.rows; r++) { + for (c=0; c<Lcd.cols; c++) { + if (Bar[r][c].segment==pack_i) + Bar[r][c].segment=pack_j; + if (Bar[r][c].segment==nSegment) + Bar[r][c].segment=pack_i; + } + } + } + } +} + +static void HD_define_chars (void) +{ + int c, i, j; + char buffer[8]; + + for (i=2; i<nSegment; i++) { + if (Segment[i].used) continue; + if (Segment[i].ascii!=-1) continue; + for (c=0; c<CHARS; c++) { + for (j=2; j<nSegment; j++) { + if (Segment[j].ascii==c) break; + } + if (j==nSegment) break; + } + Segment[i].ascii=c; + switch (Segment[i].type) { + case BAR_L: + for (j=0; j<4; j++) { + char Pixel[] = { 0, 1, 3, 7, 15, 31 }; + buffer[j]=Pixel[Segment[i].len1]; + buffer[j+4]=Pixel[Segment[i].len2]; + } + break; + case BAR_R: + for (j=0; j<4; j++) { + char Pixel[] = { 0, 16, 24, 28, 30, 31 }; + buffer[j]=Pixel[Segment[i].len1]; + buffer[j+4]=Pixel[Segment[i].len2]; + } + break; + case BAR_U: + for (j=0; j<Segment[i].len1; j++) { + buffer[7-j]=31; + } + for (; j<YRES; j++) { + buffer[7-j]=0; + } + break; + case BAR_D: + for (j=0; j<Segment[i].len1; j++) { + buffer[j]=31; + } + for (; j<YRES; j++) { + buffer[j]=0; + } + break; + } + HD_command (0x40|8*c); + HD_write (buffer, 8); + } +} + +int HD_clear (void) +{ + int row, col; + + for (row=0; row<Lcd.rows; row++) { + for (col=0; col<Lcd.cols; col++) { + Txt[row][col]='\t'; + Bar[row][col].len1=-1; + Bar[row][col].len2=-1; + Bar[row][col].type=0; + Bar[row][col].segment=-1; + } + } + HD_command (0x01); // clear display + HD_delay (1640); + return 0; +} + +static void HD_quit (int signal); //forward declaration + +int HD_init (LCD *Self) +{ + int rows=-1, cols=-1; + char *s, *e; + + s=cfg_get ("Port"); + if (s==NULL || *s=='\0') { + fprintf (stderr, "HD44780: no 'Port' entry in %s\n", cfg_file()); + return -1; + } + if ((Port=strtol(s, &e, 0))==0 || *e!='\0') { + fprintf (stderr, "HD44780: bad port '%s' in %s\n", s, cfg_file()); + return -1; + } + + s=cfg_get("Size"); + if (s==NULL || *s=='\0') { + fprintf (stderr, "HD44780: no 'Size' entry in %s\n", cfg_file()); + return -1; + } + + if (sscanf(s,"%dx%d",&cols,&rows)!=2 || rows<1 || cols<1) { + fprintf(stderr,"HD44780: bad size '%s'\n",s); + return -1; + } + + Self->rows=rows; + Self->cols=cols; + Lcd=*Self; + + if (HD_open()!=0) + return -1; + + HD_clear(); + + signal(SIGINT, HD_quit); + signal(SIGQUIT, HD_quit); + signal(SIGTERM, HD_quit); + + return 0; +} + +void HD_goto (int row, int col) +{ + int pos; + pos=(row%2)*64+col; + if (row>2) pos+=20; + HD_command (0x80|pos); + HD_delay(40); +} + +int HD_put (int row, int col, char *text) +{ + char *p=&Txt[row][col]; + char *t=text; + + while (*t && col++<=Lcd.cols) { + *p++=*t++; + } + return 0; +} + +int HD_bar (int type, int row, int col, int max, int len1, int len2) +{ + int rev=0; + + if (len1<1) len1=1; + else if (len1>max) len1=max; + + if (len2<1) len2=1; + else if (len2>max) len2=max; + + switch (type) { + case BAR_L: + len1=max-len1; + len2=max-len2; + rev=1; + + case BAR_R: + while (max>0 && col<=Lcd.cols) { + Bar[row][col].type=type; + Bar[row][col].segment=-1; + if (len1>=XRES) { + Bar[row][col].len1=rev?0:XRES; + len1-=XRES; + } else { + Bar[row][col].len1=rev?XRES-len1:len1; + len1=0; + } + if (len2>=XRES) { + Bar[row][col].len2=rev?0:XRES; + len2-=XRES; + } else { + Bar[row][col].len2=rev?XRES-len2:len2; + len2=0; + } + max-=XRES; + col++; + } + break; + + case BAR_U: + len1=max-len1; + len2=max-len2; + rev=1; + + case BAR_D: + while (max>0 && row<=Lcd.rows) { + Bar[row][col].type=type; + Bar[row][col].segment=-1; + if (len1>=YRES) { + Bar[row][col].len1=rev?0:YRES; + len1-=YRES; + } else { + Bar[row][col].len1=rev?YRES-len1:len1; + len1=0; + } + if (len2>=YRES) { + Bar[row][col].len2=rev?0:YRES; + len2-=YRES; + } else { + Bar[row][col].len2=rev?YRES-len2:len2; + len2=0; + } + max-=YRES; + row++; + } + break; + + } + return 0; +} + +int HD_flush (void) +{ + char buffer[256]; + char *p; + int s, row, col; + + HD_process_bars(); + HD_compact_bars(); + HD_define_chars(); + + for (s=0; s<nSegment; s++) { + Segment[s].used=0; + } + + for (row=0; row<Lcd.rows; row++) { + for (col=0; col<Lcd.cols; col++) { + s=Bar[row][col].segment; + if (s!=-1) { + Segment[s].used=1; + Txt[row][col]=Segment[s].ascii; + } + } + for (col=0; col<Lcd.cols; col++) { + if (Txt[row][col]=='\t') continue; + HD_goto (row, col); + for (p=buffer; col<Lcd.cols; col++, p++) { + if (Txt[row][col]=='\t') break; + *p=Txt[row][col]; + } + HD_write (buffer, p-buffer); + } + } + return 0; +} + +int lcd_hello (void); // prototype from lcd4linux.c + +static void HD_quit (int signal) +{ + HD_clear(); + lcd_hello(); + // Fixme: ioperm rückgängig machen? + exit (0); +} + +LCD HD44780[] = { + { "HD44780", 0, 0, XRES, YRES, BARS, HD_init, HD_clear, HD_put, HD_bar, HD_flush }, + { NULL } +}; diff --git a/Makefile.am b/Makefile.am index 62d720e..d753ee0 100644 --- a/Makefile.am +++ b/Makefile.am @@ -25,5 +25,6 @@ pixmap.c pixmap.h \ fontmap.c fontmap.h \ Skeleton.c \ MatrixOrbital.c \ +HD44780.c \ Raster.c \ XWindow.c diff --git a/Makefile.in b/Makefile.in index 722390e..de72cb1 100644 --- a/Makefile.in +++ b/Makefile.in @@ -73,7 +73,7 @@ AM_CFLAGS = $(X_CFLAGS) -Wall lcd4linux_LDFLAGS = $(X_LIBS) @WITH_X_TRUE@lcd4linux_LDADD = -lX11 -lcd4linux_SOURCES = lcd4linux.c cfg.c cfg.h lock.c lock.h parser.c parser.h processor.c processor.h system.c system.h isdn.c isdn.h filter.c filter.h display.c display.h pixmap.c pixmap.h fontmap.c fontmap.h Skeleton.c MatrixOrbital.c Raster.c XWindow.c +lcd4linux_SOURCES = lcd4linux.c cfg.c cfg.h lock.c lock.h parser.c parser.h processor.c processor.h system.c system.h isdn.c isdn.h filter.c filter.h display.c display.h pixmap.c pixmap.h fontmap.c fontmap.h Skeleton.c MatrixOrbital.c HD44780.c Raster.c XWindow.c ACLOCAL_M4 = $(top_srcdir)/aclocal.m4 mkinstalldirs = $(SHELL) $(top_srcdir)/mkinstalldirs @@ -91,7 +91,7 @@ X_EXTRA_LIBS = @X_EXTRA_LIBS@ X_PRE_LIBS = @X_PRE_LIBS@ lcd4linux_OBJECTS = lcd4linux.o cfg.o lock.o parser.o processor.o \ system.o isdn.o filter.o display.o pixmap.o fontmap.o Skeleton.o \ -MatrixOrbital.o Raster.o XWindow.o +MatrixOrbital.o HD44780.o Raster.o XWindow.o @WITH_X_TRUE@lcd4linux_DEPENDENCIES = CFLAGS = @CFLAGS@ COMPILE = $(CC) $(DEFS) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) @@ -105,10 +105,11 @@ DISTFILES = $(DIST_COMMON) $(SOURCES) $(HEADERS) $(TEXINFOS) $(EXTRA_DIST) TAR = tar GZIP_ENV = --best -DEP_FILES = .deps/MatrixOrbital.P .deps/Raster.P .deps/Skeleton.P \ -.deps/XWindow.P .deps/cfg.P .deps/display.P .deps/filter.P \ -.deps/fontmap.P .deps/isdn.P .deps/lcd4linux.P .deps/lock.P \ -.deps/parser.P .deps/pixmap.P .deps/processor.P .deps/system.P +DEP_FILES = .deps/HD44780.P .deps/MatrixOrbital.P .deps/Raster.P \ +.deps/Skeleton.P .deps/XWindow.P .deps/cfg.P .deps/display.P \ +.deps/filter.P .deps/fontmap.P .deps/isdn.P .deps/lcd4linux.P \ +.deps/lock.P .deps/parser.P .deps/pixmap.P .deps/processor.P \ +.deps/system.P SOURCES = $(lcd4linux_SOURCES) OBJECTS = $(lcd4linux_OBJECTS) diff --git a/MatrixOrbital.c b/MatrixOrbital.c index ebd224d..e178f79 100644 --- a/MatrixOrbital.c +++ b/MatrixOrbital.c @@ -1,4 +1,4 @@ -/* $Id: MatrixOrbital.c,v 1.14 2000/04/10 04:40:53 reinelt Exp $ +/* $Id: MatrixOrbital.c,v 1.15 2000/04/12 08:05:45 reinelt Exp $ * * driver for Matrix Orbital serial display modules * @@ -20,6 +20,10 @@ * * * $Log: MatrixOrbital.c,v $ + * Revision 1.15 2000/04/12 08:05:45 reinelt + * + * first version of the HD44780 driver + * * Revision 1.14 2000/04/10 04:40:53 reinelt * * minor changes and cleanups @@ -95,7 +99,6 @@ #include "lock.h" #include "display.h" -#define SPEED 19200 #define XRES 5 #define YRES 8 #define CHARS 8 @@ -367,7 +370,7 @@ int MO_clear (void) return 0; } -static void MO_quit (int signal); //forward decvlaration +static void MO_quit (int signal); //forward declaration int MO_init (LCD *Self) { @@ -411,10 +414,6 @@ int MO_init (LCD *Self) Device=MO_open(); if (Device==-1) return -1; - signal(SIGINT, MO_quit); - signal(SIGQUIT, MO_quit); - signal(SIGTERM, MO_quit); - MO_clear(); MO_contrast(); @@ -425,6 +424,10 @@ int MO_init (LCD *Self) MO_write ("\376R", 2); // auto scroll off MO_write ("\376V", 2); // GPO off + signal(SIGINT, MO_quit); + signal(SIGQUIT, MO_quit); + signal(SIGTERM, MO_quit); + return 0; } @@ -1,4 +1,4 @@ -/* $Id: display.c,v 1.14 2000/04/03 17:31:52 reinelt Exp $ +/* $Id: display.c,v 1.15 2000/04/12 08:05:45 reinelt Exp $ * * framework for device drivers * @@ -20,6 +20,10 @@ * * * $Log: display.c,v $ + * Revision 1.15 2000/04/12 08:05:45 reinelt + * + * first version of the HD44780 driver + * * Revision 1.14 2000/04/03 17:31:52 reinelt * * suppress welcome message if display is smaller than 20x2 @@ -119,12 +123,14 @@ extern LCD Skeleton[]; extern LCD MatrixOrbital[]; +extern LCD HD44780[]; extern LCD Raster[]; extern LCD XWindow[]; FAMILY Driver[] = { { "Skeleton", Skeleton }, { "Matrix Orbital", MatrixOrbital }, + { "Parallel port", HD44780 }, { "Raster", Raster }, #ifndef X_DISPLAY_MISSING { "X Window System", XWindow }, diff --git a/lcd4linux.conf.sample b/lcd4linux.conf.sample index 2f37c77..f3ed752 100644 --- a/lcd4linux.conf.sample +++ b/lcd4linux.conf.sample @@ -3,6 +3,11 @@ #Speed 19200 #Contrast 160 +Display HD44780 +Port 0x378 +Size 16x2 + + #Display PPM #size 20x4 #font 5x8 @@ -13,16 +18,15 @@ #halfground \#70c000 #background \#80d000 -Display X11 -size 20x5 -font 5x8 -pixel 1+0 -gap -1x-1 -border 1 -foreground \#102000 -halfground \#90c000 -background \#a0d000 - +#Display X11 +#size 20x5 +#font 5x8 +#pixel 1+0 +#gap -1x-1 +#border 1 +#foreground \#102000 +#halfground \#90c000 +#background \#a0d000 #Row1 "*** %o %v ***" #Row2 "%p CPU %r MB RAM" |