[lcd4linux @ 2005-01-15 13:13:57 by reinelt]

LCDTerm driver added, take 2

1 files changed, 301 insertions, 0 deletions

diff --git a/drv_LCDTerm.c b/drv_LCDTerm.c
new file mode 100644
index 0000000..a554be3
--- /dev/null
+++ b/drv_LCDTerm.c
@@ -0,0 +1,301 @@
+/* $Id: drv_LCDTerm.c,v 1.1 2005/01/15 13:13:57 reinelt Exp $
+ *
+ * driver for the LCDTerm serial-to-HD44780 adapter boards
+ * http://www.bobblick.com/techref/projects/lcdterm/lcdterm.html
+ *
+ * Copyright 2005 Michael Reinelt <reinelt@eunet.at>
+ * Copyright 2005 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
+ *
+ * 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: drv_LCDTerm.c,v $
+ * Revision 1.1  2005/01/15 13:13:57  reinelt
+ * LCDTerm driver added, take 2
+ *
+ */
+
+/* 
+ *
+ * exported fuctions:
+ *
+ * struct DRIVER drv_LCDTerm
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <termios.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+
+#include "debug.h"
+#include "cfg.h"
+#include "qprintf.h"
+#include "plugin.h"
+#include "widget.h"
+#include "widget_text.h"
+#include "widget_icon.h"
+#include "widget_bar.h"
+#include "drv.h"
+#include "drv_generic_text.h"
+#include "drv_generic_serial.h"
+
+#define LCD_CLEAR 0x03    
+#define LCD_CMD   0x12
+#define LCD_DATA  0x14
+
+static char Name[]="LCDTerm";
+
+
+/****************************************/
+/***  hardware dependant functions    ***/
+/****************************************/
+
+static void drv_LT_clear (void)
+{
+  char cmd[1];
+  
+  cmd[0] = LCD_CLEAR; /* clear display */
+  drv_generic_serial_write (cmd, 1);  /* clear screen */
+}
+
+
+static int drv_LT_send (const char request, const char value)
+{
+  char buf[2];
+
+  buf[0] = request;
+  buf[1] = value;
+  drv_generic_serial_write (buf, 2);
+  
+  return 0;
+}
+
+
+static void drv_LT_command (const char cmd)
+{
+  drv_LT_send (LCD_CMD, cmd);
+}
+
+
+static void drv_LT_write (const int row, const int col, const char *data, int len)
+{
+  int pos;
+  
+  /* 16x4 Displays use a slightly different layout */
+  if (DCOLS==16 && DROWS==4) {
+    pos = (row%2)*64+(row/2)*16+col;
+  } else {  
+    pos = (row%2)*64+(row/2)*20+col;
+  }
+
+  drv_LT_command (0x80|pos);
+  
+  while (len--) {
+    drv_LT_send (LCD_DATA, *data++);
+  }
+}
+
+static void drv_LT_defchar (const int ascii, const unsigned char *matrix)
+{
+  int i;
+  
+  drv_LT_command (0x40|8*ascii);
+
+  for (i = 0; i < 8; i++) {
+    drv_LT_send (LCD_DATA, *matrix++ & 0x1f);
+  }
+}
+
+
+static int drv_LT_start (const char *section, const int quiet)
+{
+  int rows=-1, cols=-1;
+  char *s;
+
+  if (drv_generic_serial_open(section, Name, 0) < 0) return -1;
+
+  s=cfg_get(section, "Size", NULL);
+  if (s==NULL || *s=='\0') {
+    error ("%s: no '%s.Size' entry from %s", Name, section, cfg_source());
+    return -1;
+  }
+  if (sscanf(s,"%dx%d",&cols,&rows)!=2 || rows<1 || cols<1) {
+    error ("%s: bad %s.Size '%s' from %s", Name, section, s, cfg_source());
+    free (s);
+    return -1;
+  }
+  
+  DROWS = rows;
+  DCOLS = cols;
+  
+  /* initialize display */
+  drv_LT_command (0x29); /* 8 Bit mode, 1/16 duty cycle, 5x8 font */
+  drv_LT_command (0x08); /* Display off, cursor off, blink off */
+  drv_LT_command (0x0c); /* Display on, cursor off, blink off */
+  drv_LT_command (0x06); /* curser moves to right, no shift */
+
+  drv_LT_clear();        /* clear display */
+  
+  if (!quiet) {
+    char buffer[40];
+    qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS);
+    if (drv_generic_text_greet (buffer, "www.bwct.de")) {
+      sleep (3);
+      drv_LT_clear();
+    }
+  }
+  
+  return 0;
+}
+
+
+/****************************************/
+/***            plugins               ***/
+/****************************************/
+
+/* none */
+
+
+/****************************************/
+/***        widget callbacks          ***/
+/****************************************/
+
+
+/* using drv_generic_text_draw(W) */
+/* using drv_generic_text_icon_draw(W) */
+/* using drv_generic_text_bar_draw(W) */
+
+
+/****************************************/
+/***        exported functions        ***/
+/****************************************/
+
+
+/* list models */
+int drv_LT_list (void)
+{
+  printf ("generic");
+  return 0;
+}
+
+
+/* initialize driver & display */
+int drv_LT_init (const char *section, const int quiet)
+{
+  WIDGET_CLASS wc;
+  int asc255bug;
+  int ret;  
+  
+  /* display preferences */
+  XRES  = 5;      /* pixel width of one char  */
+  YRES  = 8;      /* pixel height of one char  */
+  CHARS = 8;      /* number of user-defineable characters */
+  CHAR0 = 0;      /* ASCII of first user-defineable char */
+
+  /* Fixme: */
+  GOTO_COST = 2;  /* number of bytes a goto command requires */
+  
+  /* real worker functions */
+  drv_generic_text_real_write   = drv_LT_write;
+  drv_generic_text_real_defchar = drv_LT_defchar;
+
+
+  /* start display */
+  if ((ret=drv_LT_start (section, quiet))!=0)
+    return ret;
+  
+  /* initialize generic text driver */
+  if ((ret=drv_generic_text_init(section, Name))!=0)
+    return ret;
+
+  /* initialize generic icon driver */
+  if ((ret=drv_generic_text_icon_init())!=0)
+    return ret;
+  
+  /* initialize generic bar driver */
+  if ((ret=drv_generic_text_bar_init(0))!=0)
+    return ret;
+  
+  /* add fixed chars to the bar driver */
+  /* most displays have a full block on ascii 255, but some have kind of  */
+  /* an 'inverted P'. If you specify 'asc255bug 1 in the config, this */
+  /* char will not be used, but rendered by the bar driver */
+  cfg_number(section, "asc255bug", 0, 0, 1, &asc255bug);
+  drv_generic_text_bar_add_segment (  0,  0,255, 32); /* ASCII  32 = blank */
+  if (!asc255bug) 
+    drv_generic_text_bar_add_segment (255,255,255,255); /* ASCII 255 = block */
+  
+  /* register text widget */
+  wc=Widget_Text;
+  wc.draw=drv_generic_text_draw;
+  widget_register(&wc);
+  
+  /* register icon widget */
+  wc=Widget_Icon;
+  wc.draw=drv_generic_text_icon_draw;
+  widget_register(&wc);
+  
+  /* register bar widget */
+  wc=Widget_Bar;
+  wc.draw=drv_generic_text_bar_draw;
+  widget_register(&wc);
+  
+  /* register plugins */
+  /* none */
+
+  return 0;
+}
+
+
+/* close driver & display */
+int drv_LT_quit (const int quiet)
+{
+
+  info("%s: shutting down.", Name);
+  
+  drv_generic_text_quit();
+  
+  /* clear display */
+  drv_LT_clear();
+  
+  /* say goodbye... */
+  if (!quiet) {
+    drv_generic_text_greet ("goodbye!", NULL);
+  }
+  
+  drv_generic_serial_close();
+  
+  return (0);
+}
+
+
+DRIVER drv_LCDTerm = {
+  name: Name,
+  list: drv_LT_list,
+  init: drv_LT_init,
+  quit: drv_LT_quit, 
+};
+
+