264 lines
7.4 KiB
C
264 lines
7.4 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 by Daniel Stenberg <daniel@haxx.se>
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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/*
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* This file is meant for generic LCD defines and global variables etc.
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*/
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#include "lcd.h"
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#ifdef LCD_DEBUG
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#include <stdio.h>
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#endif
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#define DISP_X LCD_WIDTH /* Display width in pixels */
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#define DISP_Y LCD_HEIGHT /* Display height in pixels */
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#define CHAR_X 6 /* Character width in pixels */
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#define CHAR_Y 8 /* Character height in pixels */
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#define COL_MASK 0xff /* Character column pixels changed */
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/*
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* ASCII character generation table
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*
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* This contains only the printable characters (0x20-0x7f).
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* Each row in this table is a 5x8 pixel character pattern.
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* Each byte is a column of pixels, with the top pixel in the LSB.
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*/
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#define ASCII_MIN 0x20 /* First char in table */
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#define ASCII_MAX 0x7f /* Last char in table */
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static const unsigned char lcd_font_data[ASCII_MAX-ASCII_MIN+1][CHAR_X-1] =
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{
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0x00, 0x00, 0x00, 0x00, 0x00, /* 0x20-0x2f */
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0x00, 0x00, 0x4f, 0x00, 0x00,
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0x00, 0x07, 0x00, 0x07, 0x00,
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0x14, 0x7f, 0x14, 0x7f, 0x14,
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0x24, 0x2a, 0x7f, 0x2a, 0x12,
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0x23, 0x13, 0x08, 0x64, 0x62,
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0x36, 0x49, 0x55, 0x22, 0x50,
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0x00, 0x05, 0x03, 0x00, 0x00,
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0x00, 0x1c, 0x22, 0x41, 0x00,
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0x00, 0x41, 0x22, 0x1c, 0x00,
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0x14, 0x08, 0x3e, 0x08, 0x14,
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0x08, 0x08, 0x3e, 0x08, 0x08,
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0x00, 0xa0, 0x60, 0x00, 0x00,
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0x08, 0x08, 0x08, 0x08, 0x08,
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0x00, 0x60, 0x60, 0x00, 0x00,
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0x20, 0x10, 0x08, 0x04, 0x02,
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0x3e, 0x51, 0x49, 0x45, 0x3e, /* 0x30-0x3f */
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0x00, 0x42, 0x7f, 0x40, 0x00,
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0x42, 0x61, 0x51, 0x49, 0x46,
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0x21, 0x41, 0x45, 0x4b, 0x31,
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0x18, 0x14, 0x12, 0x7f, 0x10,
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0x27, 0x45, 0x45, 0x45, 0x39,
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0x3c, 0x4a, 0x49, 0x49, 0x30,
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0x01, 0x71, 0x09, 0x05, 0x03,
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0x36, 0x49, 0x49, 0x49, 0x36,
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0x06, 0x49, 0x49, 0x29, 0x1e,
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0x00, 0x6c, 0x6c, 0x00, 0x00,
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0x00, 0xac, 0x6c, 0x00, 0x00,
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0x08, 0x14, 0x22, 0x41, 0x00,
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0x14, 0x14, 0x14, 0x14, 0x14,
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0x00, 0x41, 0x22, 0x14, 0x08,
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0x02, 0x01, 0x51, 0x09, 0x06,
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0x32, 0x49, 0x79, 0x41, 0x3e, /* 0x40-0x4f */
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0x7e, 0x11, 0x11, 0x11, 0x7e,
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0x7f, 0x49, 0x49, 0x49, 0x36,
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0x3e, 0x41, 0x41, 0x41, 0x22,
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0x7f, 0x41, 0x41, 0x22, 0x1c,
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0x7f, 0x49, 0x49, 0x49, 0x41,
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0x7f, 0x09, 0x09, 0x09, 0x01,
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0x3e, 0x41, 0x49, 0x49, 0x7a,
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0x7f, 0x08, 0x08, 0x08, 0x7f,
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0x00, 0x41, 0x7f, 0x41, 0x00,
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0x20, 0x40, 0x41, 0x3f, 0x01,
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0x7f, 0x08, 0x14, 0x22, 0x41,
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0x7f, 0x40, 0x40, 0x40, 0x40,
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0x7f, 0x02, 0x0c, 0x02, 0x7f,
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0x7f, 0x04, 0x08, 0x10, 0x7f,
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0x3e, 0x41, 0x41, 0x41, 0x3e,
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0x7f, 0x09, 0x09, 0x09, 0x06, /* 0x50-0x5f */
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0x3e, 0x41, 0x51, 0x21, 0x5e,
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0x7f, 0x09, 0x19, 0x29, 0x46,
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0x46, 0x49, 0x49, 0x49, 0x31,
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0x01, 0x01, 0x7f, 0x01, 0x01,
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0x3f, 0x40, 0x40, 0x40, 0x3f,
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0x1f, 0x20, 0x40, 0x20, 0x1f,
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0x3f, 0x40, 0x38, 0x40, 0x3f,
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0x63, 0x14, 0x08, 0x14, 0x63,
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0x07, 0x08, 0x70, 0x08, 0x07,
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0x71, 0x51, 0x49, 0x45, 0x43,
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0x00, 0x7f, 0x41, 0x41, 0x00,
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0x02, 0x04, 0x08, 0x10, 0x20,
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0x00, 0x41, 0x41, 0x7f, 0x00,
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0x04, 0x02, 0x01, 0x02, 0x04,
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0x40, 0x40, 0x40, 0x40, 0x40,
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0x00, 0x01, 0x02, 0x04, 0x00, /* 0x60-0x6f */
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0x20, 0x54, 0x54, 0x54, 0x78,
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0x7f, 0x48, 0x44, 0x44, 0x38,
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0x38, 0x44, 0x44, 0x44, 0x20,
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0x38, 0x44, 0x44, 0x48, 0x7f,
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0x38, 0x54, 0x54, 0x54, 0x18,
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0x08, 0x7e, 0x09, 0x01, 0x02,
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0x18, 0xa4, 0xa4, 0xa4, 0x7c,
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0x7f, 0x08, 0x04, 0x04, 0x78,
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0x00, 0x44, 0x7d, 0x40, 0x00,
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0x40, 0x80, 0x84, 0x7d, 0x00,
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0x7f, 0x10, 0x28, 0x44, 0x00,
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0x00, 0x41, 0x7f, 0x40, 0x00,
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0x7c, 0x04, 0x18, 0x04, 0x78,
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0x7c, 0x08, 0x04, 0x04, 0x78,
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0x38, 0x44, 0x44, 0x44, 0x38,
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0xfc, 0x24, 0x24, 0x24, 0x18, /* 0x70-0x7f */
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0x18, 0x24, 0x24, 0x24, 0xfc,
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0x7c, 0x08, 0x04, 0x04, 0x08,
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0x48, 0x54, 0x54, 0x54, 0x20,
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0x04, 0x3f, 0x44, 0x40, 0x20,
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0x3c, 0x40, 0x40, 0x20, 0x7c,
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0x1c, 0x20, 0x40, 0x20, 0x1c,
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0x3c, 0x40, 0x30, 0x40, 0x3c,
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0x44, 0x28, 0x10, 0x28, 0x44,
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0x1c, 0xa0, 0xa0, 0xa0, 0x7c,
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0x44, 0x64, 0x54, 0x4c, 0x44,
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0x00, 0x08, 0x36, 0x41, 0x00,
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0x00, 0x00, 0x7f, 0x00, 0x00,
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0x00, 0x41, 0x36, 0x08, 0x00,
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0x04, 0x02, 0x04, 0x08, 0x04,
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0x7f, 0x7f, 0x7f, 0x7f, 0x7f,
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};
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/*
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* Memory copy of display bitmap
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*
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* This has the same format as the Recorder hardware:
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* Bits within a byte are arranged veritcally, LSB at top.
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* Byte 0 is top left, byte 1 is 2nd left, byte DISP_X starts 2nd row.
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*/
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unsigned char display[LCD_HEIGHT/8][LCD_WIDTH];
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static int lcd_y; /* Current pixel row */
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static int lcd_x; /* Current pixel column */
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/*
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* Set current x,y position
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*/
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void lcd_position(int x, int y)
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{
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if (x >= 0 && x < DISP_X && y >= 0 && y < DISP_Y) {
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lcd_x = x;
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lcd_y = y;
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#ifdef LCD_DEBUG
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fprintf(stderr, "lcd_position: set to %d, %d\n", x, y);
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#endif
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}
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#ifdef LCD_DEBUG
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else
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fprintf(stderr, "lcd_position: not set\n");
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#endif
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}
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/*
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* Clear the display
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*/
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void lcd_clear(void)
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{
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lcd_x = 0;
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lcd_y = 0;
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memset (display, 0, sizeof display);
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}
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/*
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* Display a character at current position.
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* This writes a 5x8 character within a 6x8 cell.
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* The cell does not have to be aligned to a display byte.
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* The top left of the cell is displayed at the current position.
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* invert is TRUE to display in reverse video.
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*/
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void lcd_char (int ch, char invert)
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{
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unsigned char (*dp)[DISP_X] = (void *) &display[lcd_y/8][lcd_x];
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unsigned long shift, mask, col;
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/* Limit to char generation table */
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if (ch < ASCII_MIN || ch > ASCII_MAX)
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ch = ASCII_MAX;
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/* Calculate shift and masks for cell bit position */
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shift = (lcd_y & 0x7);
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mask = ~(COL_MASK << shift);
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if (invert)
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invert = ~mask;
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/* Write each char column */
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for (col = 0; col < CHAR_X-1; col++) {
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unsigned long data = (lcd_font_data[ch-ASCII_MIN][col] << shift) ^ invert;
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dp[0][col] = (dp[0][col] & mask) | data;
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if (lcd_y < DISP_Y-8)
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dp[1][col] = (dp[1][col] & (mask >> 8)) | (data >> 8);
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}
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/* Column after char */
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dp[0][CHAR_X-1] = (dp[0][CHAR_X-1] & mask) | invert;
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if (lcd_y < DISP_Y-8)
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dp[1][CHAR_X-1] = (dp[1][CHAR_X-1] & (mask >> 8)) | (invert >> 8);
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}
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/*
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* Output a string at current position
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*/
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void lcd_string(const char *text, char invert)
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{
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int ch;
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#ifdef LCD_DEBUG
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fprintf(stderr, "lcd_string: output %s at %d, %d\n",
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text, lcd_x, lcd_y);
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#endif
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while ((ch = *text++) != '\0') {
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if (lcd_y > DISP_Y-CHAR_Y) {
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/* Scroll (8 pixels) */
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memcpy (display[0], display[1], DISP_X*(DISP_Y/8-1));
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lcd_y -= 8;
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}
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if (ch == '\n')
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lcd_x = DISP_X;
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else {
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lcd_char (ch, invert);
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lcd_x += CHAR_X;
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}
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if (lcd_x > DISP_X-CHAR_X) {
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/* Wrap to next line */
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lcd_x = 0;
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lcd_y += CHAR_Y;
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}
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}
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#ifdef LCD_DEBUG
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fprintf(stderr, "lcd_string: position after write: %d, %d\n",
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lcd_x, lcd_y);
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#endif
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}
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