[lcd4linux @ 2000-04-28 05:19:55 by reinelt]

first release of the Beckmann+Egle driver

1 files changed, 530 insertions, 0 deletions

diff --git a/BeckmannEgle.c b/BeckmannEgle.c
new file mode 100644
index 0000000..9f33166
--- /dev/null
+++ b/BeckmannEgle.c
@@ -0,0 +1,530 @@
+/* $Id: BeckmannEgle.c,v 1.1 2000/04/28 05:19:55 reinelt Exp $
+ *
+ * driver for Beckmann+Egle mini terminals
+ *
+ * Copyright 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: BeckmannEgle.c,v $
+ * Revision 1.1  2000/04/28 05:19:55  reinelt
+ *
+ * first release of the Beckmann+Egle driver
+ *
+ */
+
+/* 
+ *
+ * exported fuctions:
+ *
+ * struct LCD BeckmannEgle[]
+ *
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <signal.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 cols;
+  int rows;
+  int type;
+} MODEL;
+
+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 int Device=-1;
+static int Type=-1;
+
+static MODEL Model[]= {{ 16, 1,  0 },
+		       { 16, 2,  1 },
+		       { 16, 4,  2 },
+		       { 20, 1,  3 },
+		       { 20, 2,  4 },
+		       { 20, 4,  5 },
+		       { 24, 1,  6 },
+		       { 24, 2,  7 },
+		       { 32, 1,  8 },
+		       { 32, 2,  9 },
+		       { 40, 1, 10 },
+		       { 40, 2, 11 },
+		       { 40, 4, 12 },
+		       {  0, 0,  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 int BE_open (void)
+{
+  int fd;
+  pid_t pid;
+  struct termios portset;
+  
+  if ((pid=lock_port(Port))!=0) {
+    if (pid==-1)
+      fprintf (stderr, "BeckmannEgle: port %s could not be locked\n", Port);
+    else
+      fprintf (stderr, "BeckmannEgle: port %s is locked by process %d\n", Port, pid);
+    return -1;
+  }
+  fd = open(Port, O_RDWR | O_NOCTTY | O_NDELAY); 
+  if (fd==-1) {
+    fprintf (stderr, "BeckmannEgle: open(%s) failed: %s\n", Port, strerror(errno));
+    return -1;
+  }
+  if (tcgetattr(fd, &portset)==-1) {
+    fprintf (stderr, "BeckmannEgle: tcgetattr(%s) failed: %s\n", Port, strerror(errno));
+    return -1;
+  }
+  cfmakeraw(&portset);           // 8N1
+  portset.c_cflag |= CSTOPB;     // 2 stop bits
+  cfsetospeed(&portset, B9600);  // 9600 baud
+  if (tcsetattr(fd, TCSANOW, &portset)==-1) {
+    fprintf (stderr, "BeckmannEgle: tcsetattr(%s) failed: %s\n", Port, strerror(errno));
+    return -1;
+  }
+  return fd;
+}
+
+static void BE_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;
+    }
+    fprintf (stderr, "BeckmannEgle: write(%s) failed: %s\n", Port, strerror(errno));
+  }
+}
+
+static void BE_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 BE_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 BE_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]=BE_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, "BeckmannEgle: 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 BE_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;
+    }
+    BE_write (buffer, 11);
+  }
+}
+
+int BE_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;
+    }
+  }
+  BE_write ("\033&#", 3);
+  return 0;
+}
+
+static void BE_quit (int signal); //forward declaration
+
+int BE_init (LCD *Self)
+{
+  int i, rows=-1, cols=-1;
+  char *port, *s;
+  char buffer[5];
+
+  if (Port) {
+    free (Port);
+    Port=NULL;
+  }
+
+  port=cfg_get ("Port");
+  if (port==NULL || *port=='\0') {
+    fprintf (stderr, "BeckmannEgle: no 'Port' entry in %s\n", cfg_file());
+    return -1;
+  }
+  Port=strdup(port);
+
+  s=cfg_get("Type");
+  if (s==NULL || *s=='\0') {
+    fprintf (stderr, "BeckmannEgle: no 'Type' entry in %s\n", cfg_file());
+    return -1;
+  }
+  if (sscanf(s,"%dx%d",&cols,&rows)!=2 || rows<1 || cols<1) {
+    fprintf(stderr,"BeckmannEgle: bad type '%s'\n", s);
+    return -1;
+  }
+
+  Type=-1;
+  for (i=0; Model[i].cols; i++) {
+    if (Model[i].cols==cols && Model[i].rows==rows) {
+      Type=Model[i].type;
+      break;
+    }
+  }
+  if (Type==-1) {
+    fprintf(stderr,"BeckmannEgle: unsupported model '%dx%d'\n", cols, rows);
+    return -1;
+  }
+
+  debug ("using %dx%d display at port %s\n", cols, rows, Port);
+
+  Self->rows=rows;
+  Self->cols=cols;
+  Lcd=*Self;
+
+  Device=BE_open();
+  if (Device==-1) return -1;
+
+  snprintf (buffer, sizeof(buffer), "\033&s%c", Type);
+  BE_write (buffer, 4);    // select display type
+  BE_write ("\033&D", 3);  // cursor off
+
+  BE_clear();
+
+  signal(SIGINT,  BE_quit);
+  signal(SIGQUIT, BE_quit);
+  signal(SIGTERM, BE_quit);
+
+  return 0;
+}
+
+int BE_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 BE_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 BE_flush (void)
+{
+  char buffer[256]="\033[y;xH";
+  char *p;
+  int s, row, col;
+  
+  BE_process_bars();
+  BE_compact_bars();
+  BE_define_chars();
+  
+  for (s=0; s<nSegment; s++) {
+    Segment[s].used=0;
+  }
+
+  for (row=0; row<Lcd.rows; row++) {
+    buffer[2]=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;
+      buffer[4]=col;
+      for (p=buffer+6; col<Lcd.cols; col++, p++) {
+	if (Txt[row][col]=='\t') break;
+	*p=Txt[row][col];
+      }
+      BE_write (buffer, p-buffer);
+    }
+  }
+  return 0;
+}
+
+int lcd_hello (void); // prototype from lcd4linux.c
+
+static void BE_quit (int signal)
+{
+  debug ("got signal %d\n", signal);
+  BE_clear();
+  lcd_hello();
+  close (Device);
+  unlock_port(Port);
+  exit (0);
+}
+
+LCD BeckmannEgle[] = {
+  { "BLC100x", 0,  0, XRES, YRES, BARS, BE_init, BE_clear, BE_put, BE_bar, BE_flush },
+  { NULL }
+};