From adeb0346086c03c48c716d3551a8edafa366b299 Mon Sep 17 00:00:00 2001
From: reinelt <>
Date: Fri, 10 Mar 2000 10:49:53 +0000
Subject: [lcd4linux @ 2000-03-10 10:49:53 by reinelt] MatrixOrbital driver
 finished

---
 MatrixOrbital.c | 337 +++++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 307 insertions(+), 30 deletions(-)

(limited to 'MatrixOrbital.c')

diff --git a/MatrixOrbital.c b/MatrixOrbital.c
index c5dc6a7..56e2091 100644
--- a/MatrixOrbital.c
+++ b/MatrixOrbital.c
@@ -9,58 +9,336 @@
 #include "config.h"
 #include "display.h"
 
+#define XRES 5
+#define YRES 8
+#define CHARS 8
+
 static DISPLAY Display;
-static char *Device=NULL;
+static char *Port=NULL;
+static int Device=-1;
 
-int MO_init (DISPLAY *Self)
+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 char Txt[4][40];
+static BAR  Bar[4][40];
+
+static int nSegment=2;
+static SEGMENT Segment[256] = {{ len1:   0, len2:   0, type:255, used:0, ascii:32 },
+			       { len1:XRES, len2:XRES, type:255, used:0, ascii:255 }};
+
+#define CL 0x0b
+
+
+static int MO_open (void)
 {
-  char *port;
+  int fd;
+  struct termios portset;
   
-  printf ("initializing MatrixOrbital...\n");
+  fd = open(Port, O_RDWR | O_NOCTTY | O_NDELAY); 
+  if (fd==-1) {
+    fprintf (stderr, "MatrixOrbital: open(%s) failed: %s\n", Port, strerror(errno));
+    return -1;
+  }
+  if (tcgetattr(fd, &portset)==-1) {
+    fprintf (stderr, "MatrixOrbital: tcgetattr(%s) failed: %s\n", Port, strerror(errno));
+    return -1;
+  }
+  cfmakeraw(&portset);
+  cfsetospeed(&portset, B19200);
+  if (tcsetattr(fd, TCSANOW, &portset)==-1) {
+    fprintf (stderr, "MatrixOrbital: tcsetattr(%s) failed: %s\n", Port, strerror(errno));
+    return -1;
+  }
+  return fd;
+}
 
-  if (Device) {
-    free (Device);
-    Device=NULL;
+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;
+    }
+    fprintf (stderr, "MatrixOrbital: write(%s) failed: %s\n", Port, strerror(errno));
   }
+}
 
-  port=cfg_get ("port");
-  if (port==NULL || *port=='\0') {
-    fprintf (stderr, "MatrixOrbital: no 'port' entry in %s\n", cfg_file());
-    return -1;
+static int MO_contrast (void)
+{
+  char buffer[4];
+  int  contrast;
+
+  contrast=atoi(cfg_get("contrast"));
+  if (contrast==0) 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];
   }
-  Device=strdup(port);
+  nSegment=i;
   
-  lcd=lcd_open();
-  if (lcd==-1) return -1;
+  for (row=0; row<Display.rows; row++) {
+    for (col=0; col<Display.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;
+    }
+  }
+}
+
+#define sqr(x) ((x)*(x))
+
+static void MO_compact_bars (void)
+{
+  int i, j, r, c, min;
+  int pack_i, pack_j;
+  int error[nSegment][nSegment];
   
-  lcd_clear();
-  lcd_write ("\376B", 3);  // backlight on
-  lcd_write ("\376K", 2);  // cursor off
-  lcd_write ("\376T", 2);  // blink off
-  lcd_write ("\376D", 2);  // line wrapping off
-  lcd_write ("\376R", 2);  // auto scroll off
-  lcd_write ("\376V", 2);  // GPO off
+  if (nSegment>CHARS+2) {
+    for (i=2; i<nSegment; i++) {
+      for (j=0; j<nSegment; j++) {
+	error[i][j]=65535;
+	if (i==j) continue;
+	if (Segment[i].used) continue;
+	if (!(Segment[i].type & Segment[j].type)) continue;
+	if (Segment[i].len1==0 && Segment[j].len1!=0) continue;
+	if (Segment[i].len2==0 && Segment[j].len2!=0) continue;
+	if (Segment[i].len1==XRES && Segment[j].len1!=XRES) continue;
+	if (Segment[i].len2==XRES && Segment[j].len2!=XRES) continue;
+	if (Segment[i].len1==Segment[i].len2 && Segment[j].len1!=Segment[j].len2) continue;
+	error[i][j]=sqr(Segment[i].len1-Segment[j].len1)+sqr(Segment[i].len2-Segment[j].len2);
+      }
+    }
 
-  return 0;
+    while (nSegment>CHARS+2) {
+      min=65535;
+      pack_i=-1;
+      for (i=2; i<nSegment; i++) {
+	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) {
+	fprintf (stderr, "MatrixOrbital: 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<Display.rows; r++) {
+	for (c=0; c<Display.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 i, j, c;
+  char buffer[12]="\376N";
+  char Pixel[] = {0, 16, 24, 28, 30, 31};
+  
+  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;
+    buffer[3]=Pixel[Segment[i].len1];
+    buffer[4]=Pixel[Segment[i].len1];
+    buffer[5]=Pixel[Segment[i].len1];
+    buffer[6]=Pixel[Segment[i].len1];
+    buffer[7]=Pixel[Segment[i].len2];
+    buffer[8]=Pixel[Segment[i].len2];
+    buffer[9]=Pixel[Segment[i].len2];
+    buffer[10]=Pixel[Segment[i].len2];
+    MO_write (buffer, 11);
+  }
 }
 
 int MO_clear (void)
 {
+  int row, col;
+
+  for (row=0; row<Display.rows; row++) {
+    for (col=0; col<Display.cols; col++) {
+      Txt[row][col]=CL;
+      Bar[row][col].len1=-1;
+      Bar[row][col].len2=-1;
+      Bar[row][col].type=0;
+      Bar[row][col].segment=-1;
+    }
+  }
+  MO_write ("\014", 1);
   return 0;
 }
 
-int MO_put (int x, int y, char *text)
+int MO_init (DISPLAY *Self)
 {
+  char *port;
+
+  Display=*Self;
+
+  if (Port) {
+    free (Port);
+    Port=NULL;
+  }
+
+  port=cfg_get ("port");
+  if (port==NULL || *port=='\0') {
+    fprintf (stderr, "MatrixOrbital: no 'port' entry in %s\n", cfg_file());
+    return -1;
+  }
+  Port=strdup(port);
+
+  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
+  MO_write ("\376V", 2);  // GPO off
+
+  return 0;
+}
+
+int MO_put (int row, int col, char *text)
+{
+  char *p=&Txt[row][col];
+  char *t=text;
+  
+  while (*t && col++<=Display.cols) {
+    *p++=*t++;
+  }
   return 0;
 }
 
-int MO_bar (int type, int x, int y, int max, int len1, int len2)
+int MO_bar (int type, int row, int col, int max, int len1, int len2)
 {
+  if (len1<1) len1=1;
+  else if (len1>max) len1=max;
+  
+  if (len2<1) len2=1;
+  else if (len2>max) len2=max;
+  
+  while (max>0 && col<=Display.cols) {
+    Bar[row][col].type=type;
+    Bar[row][col].segment=-1;
+    if (len1>=XRES) {
+      Bar[row][col].len1=XRES;
+      len1-=XRES;
+    } else {
+      Bar[row][col].len1=len1;
+      len1=0;
+    }
+    if (len2>=XRES) {
+      Bar[row][col].len2=XRES;
+      len2-=XRES;
+    } else {
+      Bar[row][col].len2=len2;
+      len2=0;
+    }
+    max-=XRES;
+    col++;
+  }
   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<Display.rows; row++) {
+    buffer[3]=row+1;
+    for (col=0; col<Display.cols; col++) {
+      s=Bar[row][col].segment;
+      if (s!=-1) {
+	Segment[s].used=1;
+	Txt[row][col]=Segment[s].ascii;
+      }
+    }
+    for (col=0; col<Display.cols; col++) {
+      if (Txt[row][col]==CL) continue;
+      buffer[2]=col+1;
+      for (p=buffer+4; col<Display.cols; col++, p++) {
+	if (Txt[row][col]==CL) break;
+	*p=Txt[row][col];
+      }
+      MO_write (buffer, p-buffer);
+    }
+  }
   return 0;
 }
 
@@ -68,11 +346,10 @@ int MO_flush (void)
 #define BARS ( BAR_L | BAR_R | BAR_U | BAR_D | BAR_S )
 
 DISPLAY MatrixOrbital[] = {
-  { "LCD0821",  8, 2, 5, 8, BARS, MO_init, MO_clear, MO_put, MO_bar, MO_flush },
-  { "LCD1621", 16, 2, 5, 8, BARS, MO_init, MO_clear, MO_put, MO_bar, MO_flush },
-  { "LCD2021", 20, 2, 5, 8, BARS, MO_init, MO_clear, MO_put, MO_bar, MO_flush },
-  { "LCD2041", 20, 4, 5, 8, BARS, MO_init, MO_clear, MO_put, MO_bar, MO_flush },
-  { "LCD4021", 40, 2, 5, 8, BARS, MO_init, MO_clear, MO_put, MO_bar, MO_flush }, 
+  { "LCD0821", 2,  8, XRES, YRES, BARS, MO_init, MO_clear, MO_put, MO_bar, MO_flush },
+  { "LCD1621", 2, 16, XRES, YRES, BARS, MO_init, MO_clear, MO_put, MO_bar, MO_flush },
+  { "LCD2021", 2, 20, XRES, YRES, BARS, MO_init, MO_clear, MO_put, MO_bar, MO_flush },
+  { "LCD2041", 4, 20, XRES, YRES, BARS, MO_init, MO_clear, MO_put, MO_bar, MO_flush },
+  { "LCD4021", 2, 40, XRES, YRES, BARS, MO_init, MO_clear, MO_put, MO_bar, MO_flush }, 
   { "" }
 };
-
-- 
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