From 960aa7ec9ab275c7ebeb4bba96dbbd7b9211c000 Mon Sep 17 00:00:00 2001 From: reinelt <> Date: Wed, 12 Apr 2000 08:05:45 +0000 Subject: [lcd4linux @ 2000-04-12 08:05:45 by reinelt] first version of the HD44780 driver --- HD44780.c | 496 ++++++++++++++++++++++++++++++++++++++++++++++++++ Makefile.am | 1 + Makefile.in | 13 +- MatrixOrbital.c | 17 +- display.c | 8 +- lcd4linux.conf.sample | 24 ++- 6 files changed, 535 insertions(+), 24 deletions(-) create mode 100644 HD44780.c 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 +#include +#include +#include +#include +#include + +#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=RES && Segment[j].len1=RES && Segment[j].len2RES) 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; iCHARS+2) { + min=65535; + pack_i=-1; + pack_j=-1; + for (i=2; irows=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