/* $Id$
* $URL$
*
* plugin for ppp throughput
*
* Copyright (C) 2003 Michael Reinelt <reinel/* $Id$
* $URL$
*
* 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, "$Rev$");
/* 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,
};
