--- /dev/null
+/* $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,
+};
+
+
projects / lcd4linux.git / commitdiff