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361
bertos/drv/lcd_lm44_qt.cpp
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361
bertos/drv/lcd_lm44_qt.cpp
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/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2006 Develer S.r.l. (http://www.develer.com/)
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* Copyright 2000,2001 Bernie Innocenti <bernie@codewiz.org>
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*
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* -->
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*
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*
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* \author Bernie Innocenti <bernie@codewiz.org>
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*
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* \brief Custom Qt widget for emulating a graphics LCD display (implementation)
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*/
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/*#*
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*#* $Log$
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*#* Revision 1.1 2006/01/16 03:51:35 bernie
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*#* Add LCD Qt emulator.
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*#*
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*#*/
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#include <qpainter.h>
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#include <qfont.h>
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#include <qsizepolicy.h>
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#include <qsize.h>
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#include "EmulLCD.h"
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#include "Emul.h"
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// Display colors
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#define LCD_FG_COLOR 0x0, 0x0, 0x0
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#define LCD_BG_COLOR 0xBB, 0xCC, 0xBB
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EmulLCD::EmulLCD(QWidget *parent, const char *name) :
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QFrame(parent, name, WRepaintNoErase | WResizeNoErase),
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lcd_font("courier", 18),
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fg_color(LCD_FG_COLOR),
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bg_color(LCD_BG_COLOR),
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cr_row(0),
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cr_col(0),
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cgramaddr(-1),
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show_cursor(true)
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{
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// initialize DDRAM
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memcpy(ddram,
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"01234567890123456789"
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"abcdefghijhlmnopqrst"
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"ABCDEFGHIJKLMNOPQRST"
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"!@#$%^&*()_+|{}':?><",
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sizeof(ddram));
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// setup font
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lcd_font.setFixedPitch(true);
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setFont(lcd_font);
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// get exact font size
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QFontMetrics fm(lcd_font);
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font_width = fm.width(QChar(' '));
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font_height = fm.height();
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// set widget frame
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setFrameStyle(QFrame::Panel | QFrame::Sunken);
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// setLineWidth(2);
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frame_width = frameWidth();
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}
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EmulLCD::~EmulLCD()
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{
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// nop
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}
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QSizePolicy EmulLCD::sizePolicy() const
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{
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return QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed, false);
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}
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QSize EmulLCD::sizeHint() const
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{
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return QSize(
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font_width * COLS + frame_width * 2,
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font_height * ROWS + frame_width * 2);
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}
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void EmulLCD::drawContents(QPainter *p)
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{
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RedrawText(*p);
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}
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void EmulLCD::SetPainter(QPainter & p)
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{
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p.setBackgroundMode(OpaqueMode);
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p.setPen(fg_color);
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p.setBackgroundColor(bg_color);
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}
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void EmulLCD::RedrawText(QPainter & p)
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{
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int r, c;
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SetPainter(p);
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for (r = 0; r < ROWS; r++)
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for (c = 0; c < COLS; c++)
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PrintChar(p, r, c);
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}
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void EmulLCD::PrintChar(QPainter & p, int row, int col)
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{
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// Fetch char from DD RAM
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unsigned char c = ddram[row][col];
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// Map some Hitachi characters to ISO Latin1
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switch(c)
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{
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case 0xDF:
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c = 0xBA; // "degrees" glyph
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break;
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case 0xE4:
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c = 0xB5; // "micro" glyph
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break;
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default: // all others
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break;
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}
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// Draw char on display
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int x = col * font_width + frame_width;
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int y = row * font_height + frame_width;
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bool restore_colors = false;
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if (show_cursor && (row == cr_row) && (col == cr_col))
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{
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// Exchange FG/BG colors
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p.setPen(bg_color);
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p.setBackgroundColor(fg_color);
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restore_colors = true;
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}
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p.drawText(x, y, x + font_width, y + font_height, 0 /*tf*/,
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QString(QChar(c)), 1);
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if (restore_colors)
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{
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// Restore FG/BG colors
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p.setPen(fg_color);
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p.setBackgroundColor(bg_color);
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}
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}
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void EmulLCD::MoveCursor(int r, int c)
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{
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// Save old cursor position
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int old_row = cr_row;
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int old_col = cr_col;
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// Move the cursor
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cgramaddr = -1;
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cr_row = r;
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cr_col = c;
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if (show_cursor && (old_col != cr_col || old_row != cr_row))
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{
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QPainter p(this);
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SetPainter(p);
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// Draw new cursor
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PrintChar(p, cr_row, cr_col);
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// Erase old cursor
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PrintChar(p, old_row, old_col);
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}
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}
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void EmulLCD::ShowCursor(bool show)
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{
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show_cursor = show;
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// Draw (or erase) cursor
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QPainter p(this);
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SetPainter(p);
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PrintChar(p, cr_row, cr_col);
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}
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void EmulLCD::AdvanceCursor()
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{
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// Move the cursor
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if (cr_col == COLS - 1)
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{
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if (cr_row == ROWS - 1)
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MoveCursor(0, 0);
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else
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MoveCursor(cr_row + 1, 0);
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}
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else
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MoveCursor(cr_row, cr_col + 1);
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}
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void EmulLCD::PutChar(unsigned char c)
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{
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if (cgramaddr != -1)
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{
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// Write data in CGRAM
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cgram[cgramaddr] = c;
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// Auto increment CGRAM address
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cgramaddr = (cgramaddr + 1) & 0x3F;
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}
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else
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{
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// Writing in DDRAM
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ddram[cr_row][cr_col] = c;
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// Update display
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{
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QPainter p(this);
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SetPainter(p);
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PrintChar(p, cr_row, cr_col);
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}
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AdvanceCursor();
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}
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}
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char EmulLCD::GetChar()
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{
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char c = ddram[cr_row][cr_col];
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AdvanceCursor();
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return c;
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}
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void EmulLCD::Clear()
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{
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memset(ddram, ' ', sizeof(ddram));
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cr_row = cr_col = 0;
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QPainter p(this);
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RedrawText(p);
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}
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void EmulLCD::SetCGRamAddr(unsigned char addr)
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{
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cgramaddr = addr & (sizeof(cgram) - 1);
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}
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// Hitachi LM044L register-level emulation
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#define INI_DISPLAY 0x30
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#define INI_OP_DISP 0x38 /* 8 bits, 2 lines, 5x7 dots */
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#define ON_DISPLAY 0x0F /* Switch on display */
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#define OFF_DISPLAY 0x08 /* Switch off display */
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#define CLR_DISPLAY 0x01 /* Clear display */
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#define CURSOR_BLOCK 0x0D /* Show cursor (block) */
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#define CURSOR_LINE 0x0F /* Show cursor (line) */
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#define CURSOR_OFF 0x0C /* Hide cursor */
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#define MODE_DISPL 0x06
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#define SHIFT_DISPLAY 0x18
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#define MOVESHIFT_LEFT 0x00
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#define MOVESHIFT_RIGHT 0x04
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#define LCD_CGRAMADDR (1<<6)
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#define LCD_DDRAMADDR (1<<7)
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extern "C" void Emul_LCDWriteReg(unsigned char d)
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{
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static const unsigned char lcd_rowaddress[EmulLCD::ROWS] = { 0x80, 0xC0, 0x94, 0xD4 };
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switch(d)
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{
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case CLR_DISPLAY:
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emul->emulLCD->Clear();
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break;
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case CURSOR_BLOCK:
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case CURSOR_LINE:
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emul->emulLCD->ShowCursor(true);
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break;
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case CURSOR_OFF:
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emul->emulLCD->ShowCursor(false);
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break;
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default:
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// Set DDRAM address?
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if (d & LCD_DDRAMADDR)
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{
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for (int i = 0; i < EmulLCD::ROWS; i++)
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{
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if ((d >= lcd_rowaddress[i]) && (d < lcd_rowaddress[i] + EmulLCD::COLS))
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{
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emul->emulLCD->MoveCursor(i, d - lcd_rowaddress[i]);
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break;
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}
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}
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}
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else if (d & LCD_CGRAMADDR)
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emul->emulLCD->SetCGRamAddr(d);
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break;
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}
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}
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extern "C" unsigned char Emul_LCDReadReg(void)
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{
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return 0; /* This LCD model is never busy ;-) */
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}
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extern "C" void Emul_LCDWriteData(unsigned char d)
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{
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emul->emulLCD->PutChar(d);
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}
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extern "C" unsigned char Emul_LCDReadData(void)
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{
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return emul->emulLCD->GetChar();
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}
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#include "EmulLCD.moc"
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