190 lines
7.0 KiB
C
190 lines
7.0 KiB
C
/*
|
|
* drivers/usb/input/map_to_7segment.h
|
|
*
|
|
* Copyright (c) 2005 Henk Vergonet <Henk.Vergonet@gmail.com>
|
|
*
|
|
* This program 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 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef MAP_TO_7SEGMENT_H
|
|
#define MAP_TO_7SEGMENT_H
|
|
|
|
/* This file provides translation primitives and tables for the conversion
|
|
* of (ASCII) characters to a 7-segments notation.
|
|
*
|
|
* The 7 segment's wikipedia notation below is used as standard.
|
|
* See: http://en.wikipedia.org/wiki/Seven_segment_display
|
|
*
|
|
* Notation: +-a-+
|
|
* f b
|
|
* +-g-+
|
|
* e c
|
|
* +-d-+
|
|
*
|
|
* Usage:
|
|
*
|
|
* Register a map variable, and fill it with a character set:
|
|
* static SEG7_DEFAULT_MAP(map_seg7);
|
|
*
|
|
*
|
|
* Then use for conversion:
|
|
* seg7 = map_to_seg7(&map_seg7, some_char);
|
|
* ...
|
|
*
|
|
* In device drivers it is recommended, if required, to make the char map
|
|
* accessible via the sysfs interface using the following scheme:
|
|
*
|
|
* static ssize_t show_map(struct device *dev, char *buf) {
|
|
* memcpy(buf, &map_seg7, sizeof(map_seg7));
|
|
* return sizeof(map_seg7);
|
|
* }
|
|
* static ssize_t store_map(struct device *dev, const char *buf, size_t cnt) {
|
|
* if(cnt != sizeof(map_seg7))
|
|
* return -EINVAL;
|
|
* memcpy(&map_seg7, buf, cnt);
|
|
* return cnt;
|
|
* }
|
|
* static DEVICE_ATTR(map_seg7, PERMS_RW, show_map, store_map);
|
|
*
|
|
* History:
|
|
* 2005-05-31 RFC linux-kernel@vger.kernel.org
|
|
*/
|
|
#include <linux/errno.h>
|
|
|
|
|
|
#define BIT_SEG7_A 0
|
|
#define BIT_SEG7_B 1
|
|
#define BIT_SEG7_C 2
|
|
#define BIT_SEG7_D 3
|
|
#define BIT_SEG7_E 4
|
|
#define BIT_SEG7_F 5
|
|
#define BIT_SEG7_G 6
|
|
#define BIT_SEG7_RESERVED 7
|
|
|
|
struct seg7_conversion_map {
|
|
unsigned char table[128];
|
|
};
|
|
|
|
static inline int map_to_seg7(struct seg7_conversion_map *map, int c)
|
|
{
|
|
return c & 0x7f ? map->table[c] : -EINVAL;
|
|
}
|
|
|
|
#define SEG7_CONVERSION_MAP(_name, _map) \
|
|
struct seg7_conversion_map _name = { .table = { _map } }
|
|
|
|
/*
|
|
* It is recommended to use a facility that allows user space to redefine
|
|
* custom character sets for LCD devices. Please use a sysfs interface
|
|
* as described above.
|
|
*/
|
|
#define MAP_TO_SEG7_SYSFS_FILE "map_seg7"
|
|
|
|
/*******************************************************************************
|
|
* ASCII conversion table
|
|
******************************************************************************/
|
|
|
|
#define _SEG7(l,a,b,c,d,e,f,g) \
|
|
( a<<BIT_SEG7_A | b<<BIT_SEG7_B | c<<BIT_SEG7_C | d<<BIT_SEG7_D | \
|
|
e<<BIT_SEG7_E | f<<BIT_SEG7_F | g<<BIT_SEG7_G )
|
|
|
|
#define _MAP_0_32_ASCII_SEG7_NON_PRINTABLE \
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
|
|
#define _MAP_33_47_ASCII_SEG7_SYMBOL \
|
|
_SEG7('!',0,0,0,0,1,1,0), _SEG7('"',0,1,0,0,0,1,0), _SEG7('#',0,1,1,0,1,1,0),\
|
|
_SEG7('$',1,0,1,1,0,1,1), _SEG7('%',0,0,1,0,0,1,0), _SEG7('&',1,0,1,1,1,1,1),\
|
|
_SEG7('\'',0,0,0,0,0,1,0),_SEG7('(',1,0,0,1,1,1,0), _SEG7(')',1,1,1,1,0,0,0),\
|
|
_SEG7('*',0,1,1,0,1,1,1), _SEG7('+',0,1,1,0,0,0,1), _SEG7(',',0,0,0,0,1,0,0),\
|
|
_SEG7('-',0,0,0,0,0,0,1), _SEG7('.',0,0,0,0,1,0,0), _SEG7('/',0,1,0,0,1,0,1),
|
|
|
|
#define _MAP_48_57_ASCII_SEG7_NUMERIC \
|
|
_SEG7('0',1,1,1,1,1,1,0), _SEG7('1',0,1,1,0,0,0,0), _SEG7('2',1,1,0,1,1,0,1),\
|
|
_SEG7('3',1,1,1,1,0,0,1), _SEG7('4',0,1,1,0,0,1,1), _SEG7('5',1,0,1,1,0,1,1),\
|
|
_SEG7('6',1,0,1,1,1,1,1), _SEG7('7',1,1,1,0,0,0,0), _SEG7('8',1,1,1,1,1,1,1),\
|
|
_SEG7('9',1,1,1,1,0,1,1),
|
|
|
|
#define _MAP_58_64_ASCII_SEG7_SYMBOL \
|
|
_SEG7(':',0,0,0,1,0,0,1), _SEG7(';',0,0,0,1,0,0,1), _SEG7('<',1,0,0,0,0,1,1),\
|
|
_SEG7('=',0,0,0,1,0,0,1), _SEG7('>',1,1,0,0,0,0,1), _SEG7('?',1,1,1,0,0,1,0),\
|
|
_SEG7('@',1,1,0,1,1,1,1),
|
|
|
|
#define _MAP_65_90_ASCII_SEG7_ALPHA_UPPR \
|
|
_SEG7('A',1,1,1,0,1,1,1), _SEG7('B',1,1,1,1,1,1,1), _SEG7('C',1,0,0,1,1,1,0),\
|
|
_SEG7('D',1,1,1,1,1,1,0), _SEG7('E',1,0,0,1,1,1,1), _SEG7('F',1,0,0,0,1,1,1),\
|
|
_SEG7('G',1,1,1,1,0,1,1), _SEG7('H',0,1,1,0,1,1,1), _SEG7('I',0,1,1,0,0,0,0),\
|
|
_SEG7('J',0,1,1,1,0,0,0), _SEG7('K',0,1,1,0,1,1,1), _SEG7('L',0,0,0,1,1,1,0),\
|
|
_SEG7('M',1,1,1,0,1,1,0), _SEG7('N',1,1,1,0,1,1,0), _SEG7('O',1,1,1,1,1,1,0),\
|
|
_SEG7('P',1,1,0,0,1,1,1), _SEG7('Q',1,1,1,1,1,1,0), _SEG7('R',1,1,1,0,1,1,1),\
|
|
_SEG7('S',1,0,1,1,0,1,1), _SEG7('T',0,0,0,1,1,1,1), _SEG7('U',0,1,1,1,1,1,0),\
|
|
_SEG7('V',0,1,1,1,1,1,0), _SEG7('W',0,1,1,1,1,1,1), _SEG7('X',0,1,1,0,1,1,1),\
|
|
_SEG7('Y',0,1,1,0,0,1,1), _SEG7('Z',1,1,0,1,1,0,1),
|
|
|
|
#define _MAP_91_96_ASCII_SEG7_SYMBOL \
|
|
_SEG7('[',1,0,0,1,1,1,0), _SEG7('\\',0,0,1,0,0,1,1),_SEG7(']',1,1,1,1,0,0,0),\
|
|
_SEG7('^',1,1,0,0,0,1,0), _SEG7('_',0,0,0,1,0,0,0), _SEG7('`',0,1,0,0,0,0,0),
|
|
|
|
#define _MAP_97_122_ASCII_SEG7_ALPHA_LOWER \
|
|
_SEG7('A',1,1,1,0,1,1,1), _SEG7('b',0,0,1,1,1,1,1), _SEG7('c',0,0,0,1,1,0,1),\
|
|
_SEG7('d',0,1,1,1,1,0,1), _SEG7('E',1,0,0,1,1,1,1), _SEG7('F',1,0,0,0,1,1,1),\
|
|
_SEG7('G',1,1,1,1,0,1,1), _SEG7('h',0,0,1,0,1,1,1), _SEG7('i',0,0,1,0,0,0,0),\
|
|
_SEG7('j',0,0,1,1,0,0,0), _SEG7('k',0,0,1,0,1,1,1), _SEG7('L',0,0,0,1,1,1,0),\
|
|
_SEG7('M',1,1,1,0,1,1,0), _SEG7('n',0,0,1,0,1,0,1), _SEG7('o',0,0,1,1,1,0,1),\
|
|
_SEG7('P',1,1,0,0,1,1,1), _SEG7('q',1,1,1,0,0,1,1), _SEG7('r',0,0,0,0,1,0,1),\
|
|
_SEG7('S',1,0,1,1,0,1,1), _SEG7('T',0,0,0,1,1,1,1), _SEG7('u',0,0,1,1,1,0,0),\
|
|
_SEG7('v',0,0,1,1,1,0,0), _SEG7('W',0,1,1,1,1,1,1), _SEG7('X',0,1,1,0,1,1,1),\
|
|
_SEG7('y',0,1,1,1,0,1,1), _SEG7('Z',1,1,0,1,1,0,1),
|
|
|
|
#define _MAP_123_126_ASCII_SEG7_SYMBOL \
|
|
_SEG7('{',1,0,0,1,1,1,0), _SEG7('|',0,0,0,0,1,1,0), _SEG7('}',1,1,1,1,0,0,0),\
|
|
_SEG7('~',1,0,0,0,0,0,0),
|
|
|
|
/* Maps */
|
|
|
|
/* This set tries to map as close as possible to the visible characteristics
|
|
* of the ASCII symbol, lowercase and uppercase letters may differ in
|
|
* presentation on the display.
|
|
*/
|
|
#define MAP_ASCII7SEG_ALPHANUM \
|
|
_MAP_0_32_ASCII_SEG7_NON_PRINTABLE \
|
|
_MAP_33_47_ASCII_SEG7_SYMBOL \
|
|
_MAP_48_57_ASCII_SEG7_NUMERIC \
|
|
_MAP_58_64_ASCII_SEG7_SYMBOL \
|
|
_MAP_65_90_ASCII_SEG7_ALPHA_UPPR \
|
|
_MAP_91_96_ASCII_SEG7_SYMBOL \
|
|
_MAP_97_122_ASCII_SEG7_ALPHA_LOWER \
|
|
_MAP_123_126_ASCII_SEG7_SYMBOL
|
|
|
|
/* This set tries to map as close as possible to the symbolic characteristics
|
|
* of the ASCII character for maximum discrimination.
|
|
* For now this means all alpha chars are in lower case representations.
|
|
* (This for example facilitates the use of hex numbers with uppercase input.)
|
|
*/
|
|
#define MAP_ASCII7SEG_ALPHANUM_LC \
|
|
_MAP_0_32_ASCII_SEG7_NON_PRINTABLE \
|
|
_MAP_33_47_ASCII_SEG7_SYMBOL \
|
|
_MAP_48_57_ASCII_SEG7_NUMERIC \
|
|
_MAP_58_64_ASCII_SEG7_SYMBOL \
|
|
_MAP_97_122_ASCII_SEG7_ALPHA_LOWER \
|
|
_MAP_91_96_ASCII_SEG7_SYMBOL \
|
|
_MAP_97_122_ASCII_SEG7_ALPHA_LOWER \
|
|
_MAP_123_126_ASCII_SEG7_SYMBOL
|
|
|
|
#define SEG7_DEFAULT_MAP(_name) \
|
|
SEG7_CONVERSION_MAP(_name,MAP_ASCII7SEG_ALPHANUM)
|
|
|
|
#endif /* MAP_TO_7SEGMENT_H */
|
|
|