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[/] [hf-risc/] [trunk/] [tools/] [riscv-gnu-toolchain-master/] [linux-headers/] [include/] [linux/] [map_to_7segment.h] - Blame information for rev 13

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1 13 serginhofr 
/*
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 * Copyright (c) 2005 Henk Vergonet <Henk.Vergonet@gmail.com>
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 *
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 * This program is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU General Public License as
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 * published by the Free Software Foundation; either version 2 of
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 * the License, or (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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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 */
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#ifndef MAP_TO_7SEGMENT_H
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#define MAP_TO_7SEGMENT_H
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/* This file provides translation primitives and tables for the conversion
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 * of (ASCII) characters to a 7-segments notation.
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 *
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 * The 7 segment's wikipedia notation below is used as standard.
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 * See: http://en.wikipedia.org/wiki/Seven_segment_display
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 *
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 * Notation:    +-a-+
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 *              f   b
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 *              +-g-+
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 *              e   c
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 *              +-d-+
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 *
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 * Usage:
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 *
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 *   Register a map variable, and fill it with a character set:
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 *      static SEG7_DEFAULT_MAP(map_seg7);
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 *
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 *
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 *   Then use for conversion:
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 *      seg7 = map_to_seg7(&map_seg7, some_char);
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 *      ...
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 *
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 * In device drivers it is recommended, if required, to make the char map
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 * accessible via the sysfs interface using the following scheme:
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 *
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 * static ssize_t show_map(struct device *dev, char *buf) {
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 *      memcpy(buf, &map_seg7, sizeof(map_seg7));
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 *      return sizeof(map_seg7);
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 * }
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 * static ssize_t store_map(struct device *dev, const char *buf, size_t cnt) {
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 *      if(cnt != sizeof(map_seg7))
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 *              return -EINVAL;
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 *      memcpy(&map_seg7, buf, cnt);
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 *      return cnt;
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 * }
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 * static DEVICE_ATTR(map_seg7, PERMS_RW, show_map, store_map);
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 *
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 * History:
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 * 2005-05-31   RFC linux-kernel@vger.kernel.org
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 */
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#include <linux/errno.h>
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64 
 
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#define BIT_SEG7_A              0
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#define BIT_SEG7_B              1
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#define BIT_SEG7_C              2
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#define BIT_SEG7_D              3
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#define BIT_SEG7_E              4
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#define BIT_SEG7_F              5
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#define BIT_SEG7_G              6
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#define BIT_SEG7_RESERVED       7
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struct seg7_conversion_map {
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        unsigned char   table[128];
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};
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static __inline__ int map_to_seg7(struct seg7_conversion_map *map, int c)
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{
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        return c >= 0 && c < sizeof(map->table) ? map->table[c] : -EINVAL;
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}
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#define SEG7_CONVERSION_MAP(_name, _map)        \
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        struct seg7_conversion_map _name = { .table = { _map } }
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86 
/*
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 * It is recommended to use a facility that allows user space to redefine
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 * custom character sets for LCD devices. Please use a sysfs interface
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 * as described above.
90 
 */
91 
#define MAP_TO_SEG7_SYSFS_FILE  "map_seg7"
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93 
/*******************************************************************************
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 * ASCII conversion table
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 ******************************************************************************/
96 
 
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#define _SEG7(l,a,b,c,d,e,f,g)  \
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      ( a<<BIT_SEG7_A | b<<BIT_SEG7_B | c<<BIT_SEG7_C | d<<BIT_SEG7_D | \
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        e<<BIT_SEG7_E | f<<BIT_SEG7_F | g<<BIT_SEG7_G )
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#define _MAP_0_32_ASCII_SEG7_NON_PRINTABLE      \
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        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,
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#define _MAP_33_47_ASCII_SEG7_SYMBOL            \
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 _SEG7('!',0,0,0,0,1,1,0), _SEG7('"',0,1,0,0,0,1,0), _SEG7('#',0,1,1,0,1,1,0),\
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 _SEG7('$',1,0,1,1,0,1,1), _SEG7('%',0,0,1,0,0,1,0), _SEG7('&',1,0,1,1,1,1,1),\
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 _SEG7('\'',0,0,0,0,0,1,0),_SEG7('(',1,0,0,1,1,1,0), _SEG7(')',1,1,1,1,0,0,0),\
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 _SEG7('*',0,1,1,0,1,1,1), _SEG7('+',0,1,1,0,0,0,1), _SEG7(',',0,0,0,0,1,0,0),\
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 _SEG7('-',0,0,0,0,0,0,1), _SEG7('.',0,0,0,0,1,0,0), _SEG7('/',0,1,0,0,1,0,1),
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111 
#define _MAP_48_57_ASCII_SEG7_NUMERIC           \
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 _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),\
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 _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),\
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 _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),\
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 _SEG7('9',1,1,1,1,0,1,1),
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#define _MAP_58_64_ASCII_SEG7_SYMBOL            \
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 _SEG7(':',0,0,0,1,0,0,1), _SEG7(';',0,0,0,1,0,0,1), _SEG7('<',1,0,0,0,0,1,1),\
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 _SEG7('=',0,0,0,1,0,0,1), _SEG7('>',1,1,0,0,0,0,1), _SEG7('?',1,1,1,0,0,1,0),\
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 _SEG7('@',1,1,0,1,1,1,1),
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122 
#define _MAP_65_90_ASCII_SEG7_ALPHA_UPPR        \
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 _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),\
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 _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),\
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 _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),\
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 _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),\
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 _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),\
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 _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),\
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 _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),\
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 _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),\
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 _SEG7('Y',0,1,1,0,0,1,1), _SEG7('Z',1,1,0,1,1,0,1),
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133 
#define _MAP_91_96_ASCII_SEG7_SYMBOL            \
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 _SEG7('[',1,0,0,1,1,1,0), _SEG7('\\',0,0,1,0,0,1,1),_SEG7(']',1,1,1,1,0,0,0),\
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 _SEG7('^',1,1,0,0,0,1,0), _SEG7('_',0,0,0,1,0,0,0), _SEG7('`',0,1,0,0,0,0,0),
136 
 
137 
#define _MAP_97_122_ASCII_SEG7_ALPHA_LOWER      \
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 _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),\
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 _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),\
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 _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),\
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 _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),\
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 _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),\
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 _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),\
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 _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),\
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 _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),\
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 _SEG7('y',0,1,1,1,0,1,1), _SEG7('Z',1,1,0,1,1,0,1),
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148 
#define _MAP_123_126_ASCII_SEG7_SYMBOL          \
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 _SEG7('{',1,0,0,1,1,1,0), _SEG7('|',0,0,0,0,1,1,0), _SEG7('}',1,1,1,1,0,0,0),\
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 _SEG7('~',1,0,0,0,0,0,0),
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152 
/* Maps */
153 
 
154 
/* This set tries to map as close as possible to the visible characteristics
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 * of the ASCII symbol, lowercase and uppercase letters may differ in
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 * presentation on the display.
157 
 */
158 
#define MAP_ASCII7SEG_ALPHANUM                  \
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        _MAP_0_32_ASCII_SEG7_NON_PRINTABLE      \
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        _MAP_33_47_ASCII_SEG7_SYMBOL            \
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        _MAP_48_57_ASCII_SEG7_NUMERIC           \
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        _MAP_58_64_ASCII_SEG7_SYMBOL            \
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        _MAP_65_90_ASCII_SEG7_ALPHA_UPPR        \
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        _MAP_91_96_ASCII_SEG7_SYMBOL            \
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        _MAP_97_122_ASCII_SEG7_ALPHA_LOWER      \
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        _MAP_123_126_ASCII_SEG7_SYMBOL
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/* This set tries to map as close as possible to the symbolic characteristics
169 
 * of the ASCII character for maximum discrimination.
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 * For now this means all alpha chars are in lower case representations.
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 * (This for example facilitates the use of hex numbers with uppercase input.)
172 
 */
173 
#define MAP_ASCII7SEG_ALPHANUM_LC                       \
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        _MAP_0_32_ASCII_SEG7_NON_PRINTABLE      \
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        _MAP_33_47_ASCII_SEG7_SYMBOL            \
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        _MAP_48_57_ASCII_SEG7_NUMERIC           \
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        _MAP_58_64_ASCII_SEG7_SYMBOL            \
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        _MAP_97_122_ASCII_SEG7_ALPHA_LOWER      \
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        _MAP_91_96_ASCII_SEG7_SYMBOL            \
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        _MAP_97_122_ASCII_SEG7_ALPHA_LOWER      \
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        _MAP_123_126_ASCII_SEG7_SYMBOL
182 
 
183 
#define SEG7_DEFAULT_MAP(_name)         \
184 
        SEG7_CONVERSION_MAP(_name,MAP_ASCII7SEG_ALPHANUM)
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186 
#endif  /* MAP_TO_7SEGMENT_H */
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