lcd4linux.git - lcd4linux Debian packaging

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/* $Id: Crystalfontz.c,v 1.14 2003/09/09 06:54:43 reinelt Exp $ * * driver for display modules from Crystalfontz * * Copyright 2000 by Herbert Rosmanith (herp@wildsau.idv.uni-linz.ac.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: Crystalfontz.c,v $ * Revision 1.14 2003/09/09 06:54:43 reinelt * new function 'cfg_number()' * * Revision 1.13 2003/08/24 05:17:58 reinelt * liblcd4linux patch from Patrick Schemitz * * Revision 1.12 2003/08/19 04:28:41 reinelt * more Icon stuff, minor glitches fixed * * Revision 1.11 2003/08/17 06:57:04 reinelt * complete rewrite of the Crystalfontz driver * * Revision 1.10 2003/07/24 04:48:09 reinelt * 'soft clear' needed for virtual rows * * Revision 1.9 2003/02/22 07:53:09 reinelt * cfg_get(key,defval) * * Revision 1.8 2002/08/19 04:41:20 reinelt * introduced bar.c, moved bar stuff from display.h to bar.h * * Revision 1.7 2001/04/27 05:04:57 reinelt * * replaced OPEN_MAX with sysconf() * replaced mktemp() with mkstemp() * unlock serial port if open() fails * * Revision 1.6 2001/02/13 09:00:13 reinelt * * prepared framework for GPO's (general purpose outputs) * * Revision 1.5 2000/08/10 09:44:09 reinelt * * new debugging scheme: error(), info(), debug() * uses syslog if in daemon mode * * Revision 1.4 2000/08/09 09:50:29 reinelt * * opened 0.98 development * removed driver-specific signal-handlers * added 'quit'-function to driver structure * added global signal-handler * * Revision 1.3 2000/06/04 21:43:50 herp * minor bugfix (zero length) * */ #include <stdlib.h> #include <stdio.h> #include <string.h> #include <errno.h> #include <unistd.h> #include <termios.h> #include <fcntl.h> #include "debug.h" #include "cfg.h" #include "lock.h" #include "display.h" #include "bar.h" #define XRES 5 #define YRES 8 #define CHARS 8 static LCD Lcd; static char *Port=NULL; static speed_t Speed; static int Device=-1; static int GPO; static char *FrameBuffer1=NULL; static char *FrameBuffer2=NULL; static int CF_open (void) { int fd; pid_t pid; struct termios portset; if ((pid=lock_port(Port))!=0) { if (pid==-1) error ("Crystalfontz: port %s could not be locked", Port); else error ("Crystalfontz: port %s is locked by process %d", Port, pid); return -1; } fd = open(Port, O_RDWR | O_NOCTTY | O_NDELAY); if (fd==-1) { error ("Crystalfontz: open(%s) failed: %s", Port, strerror(errno)); unlock_port(Port); return -1; } if (tcgetattr(fd, &portset)==-1) { error ("Crystalfontz: tcgetattr(%s) failed: %s", Port, strerror(errno)); unlock_port(Port); return -1; } cfmakeraw(&portset); cfsetospeed(&portset, Speed); if (tcsetattr(fd, TCSANOW, &portset)==-1) { error ("Crystalfontz: tcsetattr(%s) failed: %s", Port, strerror(errno)); unlock_port(Port); return -1; } return fd; } static void CF_write (char *string, int len) { if (Device==-1) return; if (write (Device, string, len)==-1) { if (errno==EAGAIN) { usleep(1000); if (write (Device, string, len)>=0) return; } error ("Crystalfontz: write(%s) failed: %s", Port, strerror(errno)); } } static int CF_backlight (void) { char buffer[3]; int backlight; if (cfg_number("Backlight", 0, 0, 100, &backlight)<0) return -1; snprintf (buffer, 3, "\016%c", backlight); CF_write (buffer, 2); return 0; } static int CF_contrast (void) { char buffer[3]; int contrast; if (cfg_number("Contrast", 50, 0, 100, &contrast)<0) return -1; snprintf (buffer, 3, "\017%c", contrast); CF_write (buffer, 2); return 0; } static void CF_define_char (int ascii, char *buffer) { char cmd[3]="031"; // set custom char bitmap cmd[1]=128+(char)ascii; CF_write (cmd, 2); CF_write (buffer, 8); } static int CF_clear (int full) { memset (FrameBuffer1, ' ', Lcd.rows*Lcd.cols*sizeof(char)); bar_clear(); GPO=0; if (full) { memset (FrameBuffer2, ' ', Lcd.rows*Lcd.cols*sizeof(char)); CF_write ("\014", 1); // Form Feed (Clear Display) } return 0; } static int CF_init (LCD *Self) { char *port; int speed; Lcd=*Self; // Init the framebuffers FrameBuffer1 = (char*)malloc(Lcd.cols*Lcd.rows*sizeof(char)); FrameBuffer2 = (char*)malloc(Lcd.cols*Lcd.rows*sizeof(char)); if (FrameBuffer1==NULL || FrameBuffer2==NULL) { error ("Crystalfontz: framebuffer could not be allocated: malloc() failed"); return -1; } if (Port) { free (Port); Port=NULL; } port=cfg_get ("Port",NULL); if (port==NULL || *port=='\0') { error ("Crystalfontz: no 'Port' entry in %s", cfg_source()); return -1; } Port=strdup(port); if (cfg_number("Speed", 19200, 1200,19200, &speed)<0) return -1; switch (speed) { case 1200: Speed=B1200; break; case 2400: Speed=B2400; break; case 9600: Speed=B9600; break; case 19200: Speed=B19200; break; default: error ("Crystalfontz: unsupported speed '%d' in %s", speed, cfg_source()); return -1; } debug ("using port %s at %d baud", Port, speed); Device=CF_open(); if (Device==-1) return -1; bar_init(Lcd.rows, Lcd.cols, XRES, YRES, CHARS); bar_add_segment( 0, 0,255, 32); // ASCII 32 = blank bar_add_segment(255,255,255,255); // ASCII 255 = block // MR: why such a large delay? usleep(350000); CF_clear(1); CF_write ("\004", 1); // hide cursor CF_write ("\024", 1); // scroll off CF_write ("\030", 1); // wrap off CF_backlight(); CF_contrast(); return 0; } void CF_goto (int row, int col) { char cmd[3]="\021"; // set cursor position if (row==0 && col==0) { CF_write ("\001", 1); // cursor home } else { cmd[1]=(char)col; cmd[2]=(char)row; CF_write(cmd,3); } } int CF_put (int row, int col, char *text) { char *p=FrameBuffer1+row*Lcd.cols+col; char *t=text; while (*t && col++<=Lcd.cols) { *p++=*t++; } return 0; } int CF_bar (int type, int row, int col, int max, int len1, int len2) { return bar_draw (type, row, col, max, len1, len2); } static int CF_flush (void) { int row, col, pos1, pos2; int c, equal; bar_process(CF_define_char); for (row=0; row<Lcd.rows; row++) { for (col=0; col<Lcd.cols; col++) { c=bar_peek(row, col); if (c!=-1) { if (c!=32) c+=128; //blank FrameBuffer1[row*Lcd.cols+col]=(char)c; } } for (col=0; col<Lcd.cols; col++) { if (FrameBuffer1[row*Lcd.cols+col]==FrameBuffer2[row*Lcd.cols+col]) continue; CF_goto (row, col); for (pos1=col++, pos2=pos1, equal=0; col<Lcd.cols; col++) { if (FrameBuffer1[row*Lcd.cols+col]==FrameBuffer2[row*Lcd.cols+col]) { // If we find just one equal byte, we don't break, because this // would require a goto, which takes one byte, too. if (++equal>4) break; } else { pos2=col; equal=0; } } CF_write (FrameBuffer1+row*Lcd.cols+pos1, pos2-pos1+1); } } memcpy (FrameBuffer2, FrameBuffer1, Lcd.rows*Lcd.cols*sizeof(char)); return 0; } int CF_quit (void) { info("Crystalfontz: shutting down."); debug ("closing port %s", Port); close (Device); unlock_port(Port); if (FrameBuffer1) { free(FrameBuffer1); FrameBuffer1=NULL; } if (FrameBuffer2) { free(FrameBuffer2); FrameBuffer2=NULL; } return (0); } LCD Crystalfontz[] = { { name: "626", rows: 2, cols: 16, xres: XRES, yres: YRES, bars: BAR_L | BAR_R | BAR_U | BAR_D | BAR_H2, gpos: 0, init: CF_init, clear: CF_clear, put: CF_put, bar: CF_bar, gpo: NULL, flush: CF_flush, quit: CF_quit }, { name: "636", rows: 2, cols: 16, xres: XRES, yres: YRES, bars: BAR_L | BAR_R | BAR_U | BAR_D | BAR_H2, gpos: 0, init: CF_init, clear: CF_clear, put: CF_put, bar: CF_bar, gpo: NULL, flush: CF_flush, quit: CF_quit }, { name: "632", rows: 2, cols: 16, xres: XRES, yres: YRES, bars: BAR_L | BAR_R | BAR_U | BAR_D | BAR_H2, gpos: 0, init: CF_init, clear: CF_clear, put: CF_put, bar: CF_bar, gpo: NULL, flush: CF_flush, quit: CF_quit }, { name: "634", rows: 4, cols: 20, xres: XRES, yres: YRES, bars: BAR_L | BAR_R | BAR_U | BAR_D | BAR_H2, gpos: 0, init: CF_init, clear: CF_clear, put: CF_put, bar: CF_bar, gpo: NULL, flush: CF_flush, quit: CF_quit }, { NULL } };


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