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-rw-r--r--drv_LCDTerm.c291
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diff --git a/drv_LCDTerm.c b/drv_LCDTerm.c
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+/* $Id: drv_LCDTerm.c 975 2009-01-18 11:16:20Z michael $
+ * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/drv_LCDTerm.c $
+ *
+ * driver for the LCDTerm serial-to-HD44780 adapter boards
+ * http://www.bobblick.com/techref/projects/lcdterm/lcdterm.html
+ *
+ * Copyright (C) 2005 Michael Reinelt <michael@reinelt.co.at>
+ * Copyright (C) 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.
+ *
+ */
+
+/*
+ *
+ * exported fuctions:
+ *
+ * struct DRIVER drv_LCDTerm
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <unistd.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("LCDTerm serial-to-HD44780 adapter board");
+ return 0;
+}
+
+
+/* initialize driver & display */
+int drv_LT_init(const char *section, const int quiet)
+{
+ WIDGET_CLASS wc;
+ int asc255bug;
+ int ret;
+
+ info("%s: %s", Name, "$Rev: 975 $");
+
+ /* 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,
+};
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