/* $Id: USBLCD.c,v 1.20 2004/01/09 04:16:06 reinelt Exp $ * * Driver for USBLCD (see http://www.usblcd.de) * * Copyright 2002 Robin Adams, Adams IT Services * * This driver is based on HD44780.c, which is * Copyright 1999, 2000 Michael Reinelt * * 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: USBLCD.c,v $ * Revision 1.20 2004/01/09 04:16:06 reinelt * added 'section' argument to cfg_get(), but NULLed it on all calls by now. * * Revision 1.19 2004/01/06 22:33:14 reinelt * Copyright statements cleaned up * * Revision 1.18 2003/10/05 17:58:50 reinelt * libtool junk; copyright messages cleaned up * * Revision 1.17 2003/09/11 04:09:53 reinelt * minor cleanups * * Revision 1.16 2003/09/10 03:48:23 reinelt * Icons for M50530, new processing scheme (Ticks.Text...) * * Revision 1.15 2003/09/09 11:47:47 reinelt * basic icon support for HD44780 * * Revision 1.14 2003/09/09 06:54:43 reinelt * new function 'cfg_number()' * * Revision 1.13 2003/09/09 05:30:34 reinelt * even more icons stuff * * Revision 1.12 2003/08/24 05:17:58 reinelt * liblcd4linux patch from Patrick Schemitz * * Revision 1.11 2003/08/16 07:31:35 reinelt * double buffering in all drivers * * Revision 1.10 2003/07/24 04:48:09 reinelt * 'soft clear' needed for virtual rows * * Revision 1.9 2003/04/04 06:01:59 reinelt * new parallel port abstraction scheme * * Revision 1.8 2003/02/22 07:53:10 reinelt * cfg_get(key,defval) * * Revision 1.7 2002/08/19 09:11:34 reinelt * changed HD44780 to use generic bar functions * * Revision 1.6 2002/08/19 07:52:19 reinelt * corrected type declaration of (*defchar)() * * Revision 1.5 2002/08/19 07:36:29 reinelt * * finished bar.c, USBLCD is the first driver that uses the generic bar functions * * Revision 1.4 2002/08/19 04:41:20 reinelt * introduced bar.c, moved bar stuff from display.h to bar.h * * Revision 1.3 2002/08/18 08:11:11 reinelt * USBLCD buffered I/O * * Revision 1.2 2002/08/17 14:14:21 reinelt * * USBLCD fixes * * Revision 1.0 2002/07/08 12:16:10 radams * * first version of the USBLCD driver * */ /* * * exported fuctions: * * struct LCD UDBLCD[] * */ #include "config.h" #include #include #include #include #include #include #include #include #include #include #include #include #include "debug.h" #include "cfg.h" #include "display.h" #include "icon.h" #include "bar.h" #define GET_HARD_VERSION 1 #define GET_DRV_VERSION 2 #define XRES 5 #define YRES 8 #define CHARS 8 static LCD Lcd; static char *Port=NULL; static int usblcd_file; static int Icons; static char *FrameBuffer1=NULL; static char *FrameBuffer2=NULL; static unsigned char *Buffer; static unsigned char *BufPtr; static void USBLCD_send () { // struct timeval now, end; // gettimeofday (&now, NULL); write(usblcd_file,Buffer,BufPtr-Buffer); // gettimeofday (&end, NULL); // debug ("send %d: %d usec (%d usec/byte)", BufPtr-Buffer, 1000000*(end.tv_sec-now.tv_sec)+end.tv_usec-now.tv_usec, (1000000*(end.tv_sec-now.tv_sec)+end.tv_usec-now.tv_usec)/(BufPtr-Buffer)); BufPtr=Buffer; } static void USBLCD_command (unsigned char cmd) { *BufPtr++='\0'; *BufPtr++=cmd; } static void USBLCD_write (char *string, int len) { while (len--) { if(*string==0) *BufPtr++=*string; *BufPtr++=*string++; } } static int USBLCD_open (void) { char buf[128]; int major,minor; usblcd_file=open(Port,O_WRONLY); if (usblcd_file==-1) { error ("USBLCD: open(%s) failed: %s", Port, strerror(errno)); return -1; } memset(buf,0,sizeof(buf)); if (ioctl(usblcd_file,GET_DRV_VERSION, buf)!=0) { error ("USBLCD: ioctl() failed, could not get Driver Version!"); return -2; } debug("Driver Version: %s",buf); if (sscanf(buf,"USBLCD Driver Version %d.%d",&major,&minor)!=2) { error("USBLCD: could not read Driver Version!"); return -4; } if (major!=1) { error("USBLCD: Driver Version not supported!"); return -4; } memset(buf,0,sizeof(buf)); if (ioctl(usblcd_file,GET_HARD_VERSION, buf)!=0) { error ("USBLCD: ioctl() failed, could not get Hardware Version!"); return -3; } debug("Hardware Version: %s",buf); if (sscanf(buf,"%d.%d",&major,&minor)!=2) { error("USBLCD: could not read Hardware Version!"); return -4; }; if (major!=1) { error("USBLCD: Hardware Version not supported!"); return -4; } BufPtr=Buffer; USBLCD_command (0x29); // 8 Bit mode, 1/16 duty cycle, 5x8 font USBLCD_command (0x08); // Display off, cursor off, blink off USBLCD_command (0x0c); // Display on, cursor off, blink off USBLCD_command (0x06); // curser moves to right, no shift return 0; } static void USBLCD_define_char (int ascii, char *buffer) { USBLCD_command (0x40|8*ascii); USBLCD_write (buffer, 8); } int USBLCD_clear (int full) { memset (FrameBuffer1, ' ', Lcd.rows*Lcd.cols*sizeof(char)); icon_clear(); bar_clear(); if (full) { memset (FrameBuffer2, ' ', Lcd.rows*Lcd.cols*sizeof(char)); USBLCD_command (0x01); // clear display } return 0; } int USBLCD_init (LCD *Self) { int rows=-1, cols=-1 ; char *port, *s; if (Port) { free(Port); Port=NULL; } if ((port=cfg_get(NULL, "Port", NULL))==NULL || *port=='\0') { error ("USBLCD: no 'Port' entry in %s", cfg_source()); return -1; } if (port[0]=='/') { Port=strdup(port); } else { Port=(char *)malloc(5/*/dev/ */+strlen(port)+1); sprintf(Port,"/dev/%s",port); } debug ("using device %s ", Port); s=cfg_get(NULL, "Size", NULL); if (s==NULL || *s=='\0') { error ("USBLCD: no 'Size' entry in %s", cfg_source()); return -1; } if (sscanf(s,"%dx%d",&cols,&rows)!=2 || rows<1 || cols<1) { error ("USBLCD: bad size '%s'",s); return -1; } Self->rows=rows; Self->cols=cols; Lcd=*Self; // Init the command buffer Buffer = (char*)malloc(1024); if (Buffer==NULL) { error ("USBLCD: coommand buffer could not be allocated: malloc() failed"); return -1; } // 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 ("USBLCD: framebuffer could not be allocated: malloc() failed"); return -1; } if (USBLCD_open()!=0) return -1; if (cfg_number(NULL, "Icons", 0, 0, CHARS, &Icons)<0) return -1; if (Icons>0) { debug ("reserving %d of %d user-defined characters for icons", Icons, CHARS); icon_init(Lcd.rows, Lcd.cols, XRES, YRES, CHARS, Icons, USBLCD_define_char); Self->icons=Icons; Lcd.icons=Icons; } bar_init(rows, cols, XRES, YRES, CHARS-Icons); bar_add_segment( 0, 0,255, 32); // ASCII 32 = blank bar_add_segment(255,255,255,255); // ASCII 255 = block USBLCD_clear(1); USBLCD_send(); return 0; } void USBLCD_goto (int row, int col) { int pos=(row%2)*64+(row/2)*20+col; USBLCD_command (0x80|pos); } int USBLCD_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 USBLCD_bar (int type, int row, int col, int max, int len1, int len2) { return bar_draw (type, row, col, max, len1, len2); } int USBLCD_icon (int num, int seq, int row, int col) { return icon_draw (num, seq, row, col); } int USBLCD_flush (void) { int row, col, pos1, pos2; int c, equal; bar_process(USBLCD_define_char); for (row=0; row2) break; } else { pos2=col; equal=0; } } USBLCD_write (FrameBuffer1+row*Lcd.cols+pos1, pos2-pos1+1); } } USBLCD_send(); memcpy (FrameBuffer2, FrameBuffer1, Lcd.rows*Lcd.cols*sizeof(char)); return 0; } int USBLCD_quit (void) { info("USBLCD: shutting down."); USBLCD_send(); debug ("closing port %s", Port); close(usblcd_file); if (Buffer) { free(Buffer); Buffer=NULL; } if (FrameBuffer1) { free(FrameBuffer1); FrameBuffer1=NULL; } if (FrameBuffer2) { free(FrameBuffer2); FrameBuffer2=NULL; } return 0; } LCD USBLCD[] = { { name: "USBLCD", rows: 0, cols: 0, xres: XRES, yres: YRES, bars: BAR_L | BAR_R | BAR_U | BAR_D | BAR_H2, icons: 0, gpos: 0, init: USBLCD_init, clear: USBLCD_clear, put: USBLCD_put, bar: USBLCD_bar, icon: USBLCD_icon, gpo: NULL, flush: USBLCD_flush, quit: USBLCD_quit }, { NULL } }; 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/* $Id: MatrixOrbital.c,v 1.21 2001/02/14 07:40:16 reinelt Exp $
 *
 * driver for Matrix Orbital serial display modules
 *
 * 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: MatrixOrbital.c,v $
 * Revision 1.21  2001/02/14 07:40:16  reinelt
 *
 * first (incomplete) GPO implementation
 *
 * Revision 1.20  2001/02/13 09:00:13  reinelt
 *
 * prepared framework for GPO's (general purpose outputs)
 *
 * Revision 1.19  2000/08/10 09:44:09  reinelt
 *
 * new debugging scheme: error(), info(), debug()
 * uses syslog if in daemon mode
 *
 * Revision 1.18  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 1.17  2000/04/15 11:13:54  reinelt
 *
 * added '-d' (debugging) switch
 * added several debugging messages
 * removed config entry 'Delay' for HD44780 driver
 * delay loop for HD44780 will be calibrated automatically
 *
 * Revision 1.16  2000/04/13 06:09:52  reinelt
 *
 * added BogoMips() to system.c (not used by now, maybe sometimes we can
 * calibrate our delay loop with this value)
 *
 * added delay loop to HD44780 driver. It seems to be quite fast now. Hopefully
 * no compiler will optimize away the delay loop!
 *
 * 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
 *
 * Revision 1.13  2000/04/07 05:42:20  reinelt
 *
 * UUCP style lockfiles for the serial port
 *
 * Revision 1.12  2000/03/26 18:46:28  reinelt
 *
 * bug in pixmap.c that leaded to empty bars fixed
 * name conflicts with X11 resolved
 *
 * Revision 1.11  2000/03/25 05:50:43  reinelt
 *
 * memory leak in Raster_flush closed
 * driver family logic changed
 *
 * Revision 1.10  2000/03/23 07:24:48  reinelt
 *
 * PPM driver up and running (but slow!)
 *
 * Revision 1.9  2000/03/22 07:33:50  reinelt
 *
 * FAQ added
 * new modules 'processor.c' contains all data processing
 *
 * Revision 1.8  2000/03/19 08:41:28  reinelt
 *
 * documentation available! README, README.MatrixOrbital, README.Drivers
 * added Skeleton.c as a starting point for new drivers
 *
 * Revision 1.7  2000/03/18 08:07:04  reinelt
 *
 * vertical bars implemented
 * bar compaction improved
 * memory information implemented
 *
 * Revision 1.6  2000/03/17 09:21:42  reinelt
 *
 * various memory statistics added
 *
 * Revision 1.5  2000/03/13 15:58:24  reinelt
 *
 * release 0.9
 * moved row parsing to parser.c
 * all basic work finished
 *
 * Revision 1.4  2000/03/10 17:36:02  reinelt
 *
 * first unstable but running release
 *
 */

/* 
 *
 * exported fuctions:
 *
 * struct LCD MatrixOrbital[]
 *
 */

#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"

#define XRES 5
#define YRES 8
#define CHARS 8
#define BARS ( BAR_L | BAR_R | BAR_U | BAR_D | BAR_H2 )

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 LCD Lcd;
static char *Port=NULL;
static speed_t Speed;
static int Device=-1;

static char Txt[4][40];
static BAR  Bar[4][40];
static int  GPO;

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 int MO_open (void)
{
  int fd;
  pid_t pid;
  struct termios portset;
  
  if ((pid=lock_port(Port))!=0) {
    if (pid==-1)
      error ("MatrixOrbital: port %s could not be locked", Port);
    else
      error ("MatrixOrbital: port %s is locked by process %d", Port, pid);
    return -1;
  }
  fd = open(Port, O_RDWR | O_NOCTTY | O_NDELAY); 
  if (fd==-1) {
    error ("MatrixOrbital: open(%s) failed: %s", Port, strerror(errno));
    return -1;
  }
  if (tcgetattr(fd, &portset)==-1) {
    error ("MatrixOrbital: tcgetattr(%s) failed: %s", Port, strerror(errno));
    return -1;
  }
  cfmakeraw(&portset);
  cfsetospeed(&portset, Speed);
  if (tcsetattr(fd, TCSANOW, &portset)==-1) {
    error ("MatrixOrbital: tcsetattr(%s) failed: %s", Port, strerror(errno));
    return -1;
  }
  return fd;
}

static void MO_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 ("MatrixOrbital: write(%s) failed: %s", Port, strerror(errno));
  }
}

static int MO_contrast (void)
{
  char buffer[4];
  int  contrast;

  contrast=atoi(cfg_get("Contrast")?:"160");
  snprintf (buffer, 4, "\376P%c", contrast);
  MO_write (buffer, 3);
  return 0;
}

static void MO_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 MO_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 MO_compact_bars (void)
{
  int i, j, r, c, min;
  int pack_i, pack_j;
  int pass1=1;
  int deviation[nSegment][nSegment];
  
  if (nSegment>CHARS+2) {

    for (i=2; i<nSegment; i++) {
      for (j=0; j<nSegment; j++) {
	deviation[i][j]=MO_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 (deviation[i][j]<min) {
	    min=deviation[i][j];
	    pack_i=i;
	    pack_j=j;
	  }
	}
      }
      if (pack_i==-1) {
	if (pass1) {
	  pass1=0;
	  continue;
	} else {
	  error ("MatrixOrbital: unable to compact bar characters");
	  nSegment=CHARS;
	  break;
	}
      } 
      
      nSegment--;
      Segment[pack_i]=Segment[nSegment];
      
      for (i=0; i<nSegment; i++) {
	deviation[pack_i][i]=deviation[nSegment][i];
	deviation[i][pack_i]=deviation[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 MO_define_chars (void)
{
  int c, i, j;
  char buffer[12]="\376N";

  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;
    buffer[2]=c;
    switch (Segment[i].type) {
    case BAR_L:
      for (j=0; j<4; j++) {
	char Pixel[] = { 0, 1, 3, 7, 15, 31 };
	buffer[j+3]=Pixel[Segment[i].len1];
	buffer[j+7]=Pixel[Segment[i].len2];
      }
      break;
    case BAR_R:
      for (j=0; j<4; j++) {
	char Pixel[] = { 0, 16, 24, 28, 30, 31 };
	buffer[j+3]=Pixel[Segment[i].len1];
	buffer[j+7]=Pixel[Segment[i].len2];
      }
      break;
    case BAR_U:
      for (j=0; j<Segment[i].len1; j++) {
	buffer[10-j]=31;
      }
      for (; j<YRES; j++) {
	buffer[10-j]=0;
      }
      break;
    case BAR_D:
      for (j=0; j<Segment[i].len1; j++) {
	buffer[j+3]=31;
      }
      for (; j<YRES; j++) {
	buffer[j+3]=0;
      }
      break;
    }
    MO_write (buffer, 11);
  }
}

int MO_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;
    }
  }
  MO_write ("\014",  1);  // Clear Screen
  MO_write ("\376V", 2);  // GPO off
  GPO=0;
  return 0;
}

int MO_init (LCD *Self)
{
  char *port;
  char *speed;

  Lcd=*Self;

  if (Port) {
    free (Port);
    Port=NULL;
  }

  port=cfg_get ("Port");
  if (port==NULL || *port=='\0') {
    error ("MatrixOrbital: no 'Port' entry in %s", cfg_file());
    return -1;
  }
  Port=strdup(port);

  speed=cfg_get("Speed")?:"19200";
  
  switch (atoi(speed)) {
  case 1200:
    Speed=B1200;
    break;
  case 2400:
    Speed=B2400;
    break;
  case 9600:
    Speed=B9600;
    break;
  case 19200:
    Speed=B19200;
    break;
  default:
    error ("MatrixOrbital: unsupported speed '%s' in %s", speed, cfg_file());
    return -1;
  }    

  debug ("using port %s at %d baud", Port, atoi(speed));

  Device=MO_open();
  if (Device==-1) return -1;

  MO_clear();
  MO_contrast();

  MO_write ("\376B", 3);  // backlight on
  MO_write ("\376K", 2);  // cursor off
  MO_write ("\376T", 2);  // blink off
  MO_write ("\376D", 2);  // line wrapping off
  MO_write ("\376R", 2);  // auto scroll off

  return 0;
}

int MO_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 MO_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 MO_gpo (int num, int val)
{
  if (num>=Lcd.gpos) 
    return -1;

  if (val) {
    GPO |= 1<<num;     // set bit
  } else {
    GPO &= ~(1<<num);  // clear bit
  }
  return 0;
}

int MO_flush (void)
{
  char buffer[256]="\376G";
  char *p;
  int s, row, col;
  
  MO_process_bars();
  MO_compact_bars();
  MO_define_chars();
  
  for (s=0; s<nSegment; s++) {
    Segment[s].used=0;
  }

  for (row=0; row<Lcd.rows; row++) {
    buffer[3]=row+1;
    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;
      buffer[2]=col+1;
      for (p=buffer+4; col<Lcd.cols; col++, p++) {
	if (Txt[row][col]=='\t') break;
	*p=Txt[row][col];
      }
      MO_write (buffer, p-buffer);
    }
  }

  if (GPO & 1) {
    MO_write ("\376W", 2);  // GPO on
  } else {
    MO_write ("\376V", 2);  // GPO off
  }

  return 0;
}

int MO_quit (void)
{
  debug ("closing port %s", Port);
  close (Device);
  unlock_port(Port);
  return (0);
}

LCD MatrixOrbital[] = {
  { "LCD0821",2, 8,XRES,YRES,BARS,1,MO_init,MO_clear,MO_put,MO_bar,MO_gpo,MO_flush,MO_quit },
  { "LCD1621",2,16,XRES,YRES,BARS,1,MO_init,MO_clear,MO_put,MO_bar,MO_gpo,MO_flush,MO_quit },
  { "LCD2021",2,20,XRES,YRES,BARS,1,MO_init,MO_clear,MO_put,MO_bar,MO_gpo,MO_flush,MO_quit },
  { "LCD2041",4,20,XRES,YRES,BARS,1,MO_init,MO_clear,MO_put,MO_bar,MO_gpo,MO_flush,MO_quit },
  { "LCD4021",2,40,XRES,YRES,BARS,1,MO_init,MO_clear,MO_put,MO_bar,MO_gpo,MO_flush,MO_quit },
  { NULL }
};