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nest-open-source / nest-detect / 1.1 / freertos / refs/heads/master / . / FreeRTOS / Demo / CORTEX_LPC1768_GCC_RedSuite / src / LCD / system_fixed_be_8_15.c
blob: 4786dcb62353a67be2186858a2aa1ccba878b2bb [file] [log] [blame]
/*******************************************************************************************
Data table provides the bitmap data of each character.
To get the starting data offset of character 'A', you can use the following expression:
const unsigned char index = index_table['A'];
const unsigned int offset = offset_table[index];
const unsigned char *pData = data_table[offset];
*******************************************************************************************/
const unsigned char font_data_table[] = {
/* character 0x0020 (' '): (width=8, offset=0) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* character 0x0021 ('!'): (width=8, offset=15) */
0x00, 0x00, 0x00, 0x18, 0x3C, 0x3C, 0x3C, 0x18,
0x18, 0x00, 0x18, 0x18, 0x00, 0x00, 0x00,
/* character 0x0022 ('"'): (width=8, offset=30) */
0x00, 0x00, 0x00, 0x66, 0x66, 0x66, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* character 0x0023 ('#'): (width=8, offset=45) */
0x00, 0x00, 0x00, 0x36, 0x36, 0x7F, 0x36, 0x36,
0x36, 0x7F, 0x36, 0x36, 0x00, 0x00, 0x00,
/* character 0x0024 ('$'): (width=8, offset=60) */
0x00, 0x18, 0x18, 0x3C, 0x66, 0x60, 0x30, 0x18,
0x0C, 0x06, 0x66, 0x3C, 0x18, 0x18, 0x00,
/* character 0x0025 ('%'): (width=8, offset=75) */
0x00, 0x00, 0x70, 0xD8, 0xDA, 0x76, 0x0C, 0x18,
0x30, 0x6E, 0x5B, 0x1B, 0x0E, 0x00, 0x00,
/* character 0x0026 ('&'): (width=8, offset=90) */
0x00, 0x00, 0x00, 0x38, 0x6C, 0x6C, 0x38, 0x60,
0x6F, 0x66, 0x66, 0x3B, 0x00, 0x00, 0x00,
/* character 0x0027 ('''): (width=8, offset=105) */
0x00, 0x00, 0x00, 0x18, 0x18, 0x18, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* character 0x0028 ('('): (width=8, offset=120) */
0x00, 0x00, 0x00, 0x0C, 0x18, 0x18, 0x30, 0x30,
0x30, 0x30, 0x30, 0x18, 0x18, 0x0C, 0x00,
/* character 0x0029 (')'): (width=8, offset=135) */
0x00, 0x00, 0x00, 0x30, 0x18, 0x18, 0x0C, 0x0C,
0x0C, 0x0C, 0x0C, 0x18, 0x18, 0x30, 0x00,
/* character 0x002A ('*'): (width=8, offset=150) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x36, 0x1C, 0x7F,
0x1C, 0x36, 0x00, 0x00, 0x00, 0x00, 0x00,
/* character 0x002B ('+'): (width=8, offset=165) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x7E,
0x18, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00,
/* character 0x002C (','): (width=8, offset=180) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x1C, 0x1C, 0x0C, 0x18, 0x00,
/* character 0x002D ('-'): (width=8, offset=195) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7E,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* character 0x002E ('.'): (width=8, offset=210) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x1C, 0x1C, 0x00, 0x00, 0x00,
/* character 0x002F ('/'): (width=8, offset=225) */
0x00, 0x00, 0x00, 0x06, 0x06, 0x0C, 0x0C, 0x18,
0x18, 0x30, 0x30, 0x60, 0x60, 0x00, 0x00,
/* character 0x0030 ('0'): (width=8, offset=240) */
0x00, 0x00, 0x00, 0x1E, 0x33, 0x37, 0x37, 0x33,
0x3B, 0x3B, 0x33, 0x1E, 0x00, 0x00, 0x00,
/* character 0x0031 ('1'): (width=8, offset=255) */
0x00, 0x00, 0x00, 0x0C, 0x1C, 0x7C, 0x0C, 0x0C,
0x0C, 0x0C, 0x0C, 0x0C, 0x00, 0x00, 0x00,
/* character 0x0032 ('2'): (width=8, offset=270) */
0x00, 0x00, 0x00, 0x3C, 0x66, 0x66, 0x06, 0x0C,
0x18, 0x30, 0x60, 0x7E, 0x00, 0x00, 0x00,
/* character 0x0033 ('3'): (width=8, offset=285) */
0x00, 0x00, 0x00, 0x3C, 0x66, 0x66, 0x06, 0x1C,
0x06, 0x66, 0x66, 0x3C, 0x00, 0x00, 0x00,
/* character 0x0034 ('4'): (width=8, offset=300) */
0x00, 0x00, 0x00, 0x30, 0x30, 0x36, 0x36, 0x36,
0x66, 0x7F, 0x06, 0x06, 0x00, 0x00, 0x00,
/* character 0x0035 ('5'): (width=8, offset=315) */
0x00, 0x00, 0x00, 0x7E, 0x60, 0x60, 0x60, 0x7C,
0x06, 0x06, 0x0C, 0x78, 0x00, 0x00, 0x00,
/* character 0x0036 ('6'): (width=8, offset=330) */
0x00, 0x00, 0x00, 0x1C, 0x18, 0x30, 0x7C, 0x66,
0x66, 0x66, 0x66, 0x3C, 0x00, 0x00, 0x00,
/* character 0x0037 ('7'): (width=8, offset=345) */
0x00, 0x00, 0x00, 0x7E, 0x06, 0x0C, 0x0C, 0x18,
0x18, 0x30, 0x30, 0x30, 0x00, 0x00, 0x00,
/* character 0x0038 ('8'): (width=8, offset=360) */
0x00, 0x00, 0x00, 0x3C, 0x66, 0x66, 0x76, 0x3C,
0x6E, 0x66, 0x66, 0x3C, 0x00, 0x00, 0x00,
/* character 0x0039 ('9'): (width=8, offset=375) */
0x00, 0x00, 0x00, 0x3C, 0x66, 0x66, 0x66, 0x66,
0x3E, 0x0C, 0x18, 0x38, 0x00, 0x00, 0x00,
/* character 0x003A (':'): (width=8, offset=390) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x1C, 0x1C, 0x00,
0x00, 0x00, 0x1C, 0x1C, 0x00, 0x00, 0x00,
/* character 0x003B (';'): (width=8, offset=405) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x1C, 0x1C, 0x00,
0x00, 0x00, 0x1C, 0x1C, 0x0C, 0x18, 0x00,
/* character 0x003C ('<'): (width=8, offset=420) */
0x00, 0x00, 0x00, 0x06, 0x0C, 0x18, 0x30, 0x60,
0x30, 0x18, 0x0C, 0x06, 0x00, 0x00, 0x00,
/* character 0x003D ('='): (width=8, offset=435) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7E, 0x00,
0x7E, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* character 0x003E ('>'): (width=8, offset=450) */
0x00, 0x00, 0x00, 0x60, 0x30, 0x18, 0x0C, 0x06,
0x0C, 0x18, 0x30, 0x60, 0x00, 0x00, 0x00,
/* character 0x003F ('?'): (width=8, offset=465) */
0x00, 0x00, 0x00, 0x3C, 0x66, 0x66, 0x0C, 0x18,
0x18, 0x00, 0x18, 0x18, 0x00, 0x00, 0x00,
/* character 0x0040 ('@'): (width=8, offset=480) */
0x00, 0x00, 0x00, 0x7E, 0xC3, 0xC3, 0xCF, 0xDB,
0xDB, 0xCF, 0xC0, 0x7F, 0x00, 0x00, 0x00,
/* character 0x0041 ('A'): (width=8, offset=495) */
0x00, 0x00, 0x00, 0x18, 0x3C, 0x66, 0x66, 0x66,
0x7E, 0x66, 0x66, 0x66, 0x00, 0x00, 0x00,
/* character 0x0042 ('B'): (width=8, offset=510) */
0x00, 0x00, 0x00, 0x7C, 0x66, 0x66, 0x66, 0x7C,
0x66, 0x66, 0x66, 0x7C, 0x00, 0x00, 0x00,
/* character 0x0043 ('C'): (width=8, offset=525) */
0x00, 0x00, 0x00, 0x3C, 0x66, 0x66, 0x60, 0x60,
0x60, 0x66, 0x66, 0x3C, 0x00, 0x00, 0x00,
/* character 0x0044 ('D'): (width=8, offset=540) */
0x00, 0x00, 0x00, 0x78, 0x6C, 0x66, 0x66, 0x66,
0x66, 0x66, 0x6C, 0x78, 0x00, 0x00, 0x00,
/* character 0x0045 ('E'): (width=8, offset=555) */
0x00, 0x00, 0x00, 0x7E, 0x60, 0x60, 0x60, 0x7C,
0x60, 0x60, 0x60, 0x7E, 0x00, 0x00, 0x00,
/* character 0x0046 ('F'): (width=8, offset=570) */
0x00, 0x00, 0x00, 0x7E, 0x60, 0x60, 0x60, 0x7C,
0x60, 0x60, 0x60, 0x60, 0x00, 0x00, 0x00,
/* character 0x0047 ('G'): (width=8, offset=585) */
0x00, 0x00, 0x00, 0x3C, 0x66, 0x66, 0x60, 0x60,
0x6E, 0x66, 0x66, 0x3E, 0x00, 0x00, 0x00,
/* character 0x0048 ('H'): (width=8, offset=600) */
0x00, 0x00, 0x00, 0x66, 0x66, 0x66, 0x66, 0x7E,
0x66, 0x66, 0x66, 0x66, 0x00, 0x00, 0x00,
/* character 0x0049 ('I'): (width=8, offset=615) */
0x00, 0x00, 0x00, 0x3C, 0x18, 0x18, 0x18, 0x18,
0x18, 0x18, 0x18, 0x3C, 0x00, 0x00, 0x00,
/* character 0x004A ('J'): (width=8, offset=630) */
0x00, 0x00, 0x00, 0x06, 0x06, 0x06, 0x06, 0x06,
0x06, 0x66, 0x66, 0x3C, 0x00, 0x00, 0x00,
/* character 0x004B ('K'): (width=8, offset=645) */
0x00, 0x00, 0x00, 0x66, 0x66, 0x6C, 0x6C, 0x78,
0x6C, 0x6C, 0x66, 0x66, 0x00, 0x00, 0x00,
/* character 0x004C ('L'): (width=8, offset=660) */
0x00, 0x00, 0x00, 0x60, 0x60, 0x60, 0x60, 0x60,
0x60, 0x60, 0x60, 0x7E, 0x00, 0x00, 0x00,
/* character 0x004D ('M'): (width=8, offset=675) */
0x00, 0x00, 0x00, 0x63, 0x63, 0x77, 0x6B, 0x6B,
0x6B, 0x63, 0x63, 0x63, 0x00, 0x00, 0x00,
/* character 0x004E ('N'): (width=8, offset=690) */
0x00, 0x00, 0x00, 0x63, 0x63, 0x73, 0x7B, 0x6F,
0x67, 0x63, 0x63, 0x63, 0x00, 0x00, 0x00,
/* character 0x004F ('O'): (width=8, offset=705) */
0x00, 0x00, 0x00, 0x3C, 0x66, 0x66, 0x66, 0x66,
0x66, 0x66, 0x66, 0x3C, 0x00, 0x00, 0x00,
/* character 0x0050 ('P'): (width=8, offset=720) */
0x00, 0x00, 0x00, 0x7C, 0x66, 0x66, 0x66, 0x7C,
0x60, 0x60, 0x60, 0x60, 0x00, 0x00, 0x00,
/* character 0x0051 ('Q'): (width=8, offset=735) */
0x00, 0x00, 0x00, 0x3C, 0x66, 0x66, 0x66, 0x66,
0x66, 0x66, 0x66, 0x3C, 0x0C, 0x06, 0x00,
/* character 0x0052 ('R'): (width=8, offset=750) */
0x00, 0x00, 0x00, 0x7C, 0x66, 0x66, 0x66, 0x7C,
0x6C, 0x66, 0x66, 0x66, 0x00, 0x00, 0x00,
/* character 0x0053 ('S'): (width=8, offset=765) */
0x00, 0x00, 0x00, 0x3C, 0x66, 0x60, 0x30, 0x18,
0x0C, 0x06, 0x66, 0x3C, 0x00, 0x00, 0x00,
/* character 0x0054 ('T'): (width=8, offset=780) */
0x00, 0x00, 0x00, 0x7E, 0x18, 0x18, 0x18, 0x18,
0x18, 0x18, 0x18, 0x18, 0x00, 0x00, 0x00,
/* character 0x0055 ('U'): (width=8, offset=795) */
0x00, 0x00, 0x00, 0x66, 0x66, 0x66, 0x66, 0x66,
0x66, 0x66, 0x66, 0x3C, 0x00, 0x00, 0x00,
/* character 0x0056 ('V'): (width=8, offset=810) */
0x00, 0x00, 0x00, 0x66, 0x66, 0x66, 0x66, 0x66,
0x66, 0x66, 0x3C, 0x18, 0x00, 0x00, 0x00,
/* character 0x0057 ('W'): (width=8, offset=825) */
0x00, 0x00, 0x00, 0x63, 0x63, 0x63, 0x6B, 0x6B,
0x6B, 0x36, 0x36, 0x36, 0x00, 0x00, 0x00,
/* character 0x0058 ('X'): (width=8, offset=840) */
0x00, 0x00, 0x00, 0x66, 0x66, 0x34, 0x18, 0x18,
0x2C, 0x66, 0x66, 0x66, 0x00, 0x00, 0x00,
/* character 0x0059 ('Y'): (width=8, offset=855) */
0x00, 0x00, 0x00, 0x66, 0x66, 0x66, 0x66, 0x3C,
0x18, 0x18, 0x18, 0x18, 0x00, 0x00, 0x00,
/* character 0x005A ('Z'): (width=8, offset=870) */
0x00, 0x00, 0x00, 0x7E, 0x06, 0x06, 0x0C, 0x18,
0x30, 0x60, 0x60, 0x7E, 0x00, 0x00, 0x00,
/* character 0x005B ('['): (width=8, offset=885) */
0x00, 0x00, 0x00, 0x3C, 0x30, 0x30, 0x30, 0x30,
0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x3C,
/* character 0x005C ('\'): (width=8, offset=900) */
0x00, 0x00, 0x00, 0x60, 0x60, 0x30, 0x30, 0x18,
0x18, 0x0C, 0x0C, 0x06, 0x06, 0x00, 0x00,
/* character 0x005D (']'): (width=8, offset=915) */
0x00, 0x00, 0x00, 0x3C, 0x0C, 0x0C, 0x0C, 0x0C,
0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x3C,
/* character 0x005E ('^'): (width=8, offset=930) */
0x00, 0x18, 0x3C, 0x66, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* character 0x005F ('_'): (width=8, offset=945) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF,
/* character 0x0060 ('`'): (width=8, offset=960) */
0x00, 0x38, 0x18, 0x0C, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* character 0x0061 ('a'): (width=8, offset=975) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x3C, 0x06, 0x06,
0x3E, 0x66, 0x66, 0x3E, 0x00, 0x00, 0x00,
/* character 0x0062 ('b'): (width=8, offset=990) */
0x00, 0x00, 0x00, 0x60, 0x60, 0x7C, 0x66, 0x66,
0x66, 0x66, 0x66, 0x7C, 0x00, 0x00, 0x00,
/* character 0x0063 ('c'): (width=8, offset=1005) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x3C, 0x66, 0x60,
0x60, 0x60, 0x66, 0x3C, 0x00, 0x00, 0x00,
/* character 0x0064 ('d'): (width=8, offset=1020) */
0x00, 0x00, 0x00, 0x06, 0x06, 0x3E, 0x66, 0x66,
0x66, 0x66, 0x66, 0x3E, 0x00, 0x00, 0x00,
/* character 0x0065 ('e'): (width=8, offset=1035) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x3C, 0x66, 0x66,
0x7E, 0x60, 0x60, 0x3C, 0x00, 0x00, 0x00,
/* character 0x0066 ('f'): (width=8, offset=1050) */
0x00, 0x00, 0x00, 0x1E, 0x30, 0x30, 0x30, 0x7E,
0x30, 0x30, 0x30, 0x30, 0x00, 0x00, 0x00,
/* character 0x0067 ('g'): (width=8, offset=1065) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x3E, 0x66, 0x66,
0x66, 0x66, 0x66, 0x3E, 0x06, 0x06, 0x7C,
/* character 0x0068 ('h'): (width=8, offset=1080) */
0x00, 0x00, 0x00, 0x60, 0x60, 0x7C, 0x66, 0x66,
0x66, 0x66, 0x66, 0x66, 0x00, 0x00, 0x00,
/* character 0x0069 ('i'): (width=8, offset=1095) */
0x00, 0x00, 0x18, 0x18, 0x00, 0x78, 0x18, 0x18,
0x18, 0x18, 0x18, 0x7E, 0x00, 0x00, 0x00,
/* character 0x006A ('j'): (width=8, offset=1110) */
0x00, 0x00, 0x0C, 0x0C, 0x00, 0x3C, 0x0C, 0x0C,
0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x78,
/* character 0x006B ('k'): (width=8, offset=1125) */
0x00, 0x00, 0x00, 0x60, 0x60, 0x66, 0x66, 0x6C,
0x78, 0x6C, 0x66, 0x66, 0x00, 0x00, 0x00,
/* character 0x006C ('l'): (width=8, offset=1140) */
0x00, 0x00, 0x00, 0x78, 0x18, 0x18, 0x18, 0x18,
0x18, 0x18, 0x18, 0x7E, 0x00, 0x00, 0x00,
/* character 0x006D ('m'): (width=8, offset=1155) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x7E, 0x6B, 0x6B,
0x6B, 0x6B, 0x6B, 0x63, 0x00, 0x00, 0x00,
/* character 0x006E ('n'): (width=8, offset=1170) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x7C, 0x66, 0x66,
0x66, 0x66, 0x66, 0x66, 0x00, 0x00, 0x00,
/* character 0x006F ('o'): (width=8, offset=1185) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x3C, 0x66, 0x66,
0x66, 0x66, 0x66, 0x3C, 0x00, 0x00, 0x00,
/* character 0x0070 ('p'): (width=8, offset=1200) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x7C, 0x66, 0x66,
0x66, 0x66, 0x66, 0x7C, 0x60, 0x60, 0x60,
/* character 0x0071 ('q'): (width=8, offset=1215) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x3E, 0x66, 0x66,
0x66, 0x66, 0x66, 0x3E, 0x06, 0x06, 0x06,
/* character 0x0072 ('r'): (width=8, offset=1230) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x66, 0x6E, 0x70,
0x60, 0x60, 0x60, 0x60, 0x00, 0x00, 0x00,
/* character 0x0073 ('s'): (width=8, offset=1245) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x3E, 0x60, 0x60,
0x3C, 0x06, 0x06, 0x7C, 0x00, 0x00, 0x00,
/* character 0x0074 ('t'): (width=8, offset=1260) */
0x00, 0x00, 0x00, 0x30, 0x30, 0x7E, 0x30, 0x30,
0x30, 0x30, 0x30, 0x1E, 0x00, 0x00, 0x00,
/* character 0x0075 ('u'): (width=8, offset=1275) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x66, 0x66, 0x66,
0x66, 0x66, 0x66, 0x3E, 0x00, 0x00, 0x00,
/* character 0x0076 ('v'): (width=8, offset=1290) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x66, 0x66, 0x66,
0x66, 0x66, 0x3C, 0x18, 0x00, 0x00, 0x00,
/* character 0x0077 ('w'): (width=8, offset=1305) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x63, 0x6B, 0x6B,
0x6B, 0x6B, 0x36, 0x36, 0x00, 0x00, 0x00,
/* character 0x0078 ('x'): (width=8, offset=1320) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x66, 0x66, 0x3C,
0x18, 0x3C, 0x66, 0x66, 0x00, 0x00, 0x00,
/* character 0x0079 ('y'): (width=8, offset=1335) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x66, 0x66, 0x66,
0x66, 0x66, 0x66, 0x3C, 0x0C, 0x18, 0xF0,
/* character 0x007A ('z'): (width=8, offset=1350) */
0x00, 0x00, 0x00, 0x00, 0x00, 0x7E, 0x06, 0x0C,
0x18, 0x30, 0x60, 0x7E, 0x00, 0x00, 0x00,
/* character 0x007B ('{'): (width=8, offset=1365) */
0x00, 0x00, 0x00, 0x0C, 0x18, 0x18, 0x18, 0x30,
0x60, 0x30, 0x18, 0x18, 0x18, 0x0C, 0x00,
/* character 0x007C ('|'): (width=8, offset=1380) */
0x00, 0x00, 0x00, 0x18, 0x18, 0x18, 0x18, 0x18,
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
/* character 0x007D ('}'): (width=8, offset=1395) */
0x00, 0x00, 0x00, 0x30, 0x18, 0x18, 0x18, 0x0C,
0x06, 0x0C, 0x18, 0x18, 0x18, 0x30, 0x00,
/* character 0x007E ('~'): (width=8, offset=1410) */
0x00, 0x00, 0x00, 0x71, 0xDB, 0x8E, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* character 0x007F (''): (width=8, offset=1425) */
0x00, 0x00, 0x00, 0x7E, 0x7E, 0x7E, 0x7E, 0x7E,
0x7E, 0x7E, 0x7E, 0x7E, 0x00, 0x00, 0x00,
};
/*******************************************************************************************
Index table is used to find the mapping index of a character.
If you can find a simple mathematical expression for index mapping, you can use that.
If you do not have such a mathematical expression, this index table is just for you.
To get the index of character 'A', you can use the following expression:
const unsigned char index = index_table['A'];
*******************************************************************************************/
const unsigned char font_index_table[] = {
/* index hexcode decimal char */
/* ===== ======= ======= ==== */
0, /* 00 0 . */
0, /* 01 1 . */
0, /* 02 2 . */
0, /* 03 3 . */
0, /* 04 4 . */
0, /* 05 5 . */
0, /* 06 6 . */
0, /* 07 7 . */
0, /* 08 8 . */
0, /* 09 9 . */
0, /* 0A 10 . */
0, /* 0B 11 . */
0, /* 0C 12 . */
0, /* 0D 13 . */
0, /* 0E 14 . */
0, /* 0F 15 . */
0, /* 10 16 . */
0, /* 11 17 . */
0, /* 12 18 . */
0, /* 13 19 . */
0, /* 14 20 . */
0, /* 15 21 . */
0, /* 16 22 . */
0, /* 17 23 . */
0, /* 18 24 . */
0, /* 19 25 . */
0, /* 1A 26 . */
0, /* 1B 27 . */
0, /* 1C 28 . */
0, /* 1D 29 . */
0, /* 1E 30 . */
0, /* 1F 31 . */
0, /* 20 32 */
1, /* 21 33 ! */
2, /* 22 34 " */
3, /* 23 35 # */
4, /* 24 36 $ */
5, /* 25 37 % */
6, /* 26 38 & */
7, /* 27 39 ' */
8, /* 28 40 ( */
9, /* 29 41 ) */
10, /* 2A 42 * */
11, /* 2B 43 + */
12, /* 2C 44 , */
13, /* 2D 45 - */
14, /* 2E 46 . */
15, /* 2F 47 / */
16, /* 30 48 0 */
17, /* 31 49 1 */
18, /* 32 50 2 */
19, /* 33 51 3 */
20, /* 34 52 4 */
21, /* 35 53 5 */
22, /* 36 54 6 */
23, /* 37 55 7 */
24, /* 38 56 8 */
25, /* 39 57 9 */
26, /* 3A 58 : */
27, /* 3B 59 ; */
28, /* 3C 60 < */
29, /* 3D 61 = */
30, /* 3E 62 > */
31, /* 3F 63 ? */
32, /* 40 64 @ */
33, /* 41 65 A */
34, /* 42 66 B */
35, /* 43 67 C */
36, /* 44 68 D */
37, /* 45 69 E */
38, /* 46 70 F */
39, /* 47 71 G */
40, /* 48 72 H */
41, /* 49 73 I */
42, /* 4A 74 J */
43, /* 4B 75 K */
44, /* 4C 76 L */
45, /* 4D 77 M */
46, /* 4E 78 N */
47, /* 4F 79 O */
48, /* 50 80 P */
49, /* 51 81 Q */
50, /* 52 82 R */
51, /* 53 83 S */
52, /* 54 84 T */
53, /* 55 85 U */
54, /* 56 86 V */
55, /* 57 87 W */
56, /* 58 88 X */
57, /* 59 89 Y */
58, /* 5A 90 Z */
59, /* 5B 91 [ */
60, /* 5C 92 \ */
61, /* 5D 93 ] */
62, /* 5E 94 ^ */
63, /* 5F 95 _ */
64, /* 60 96 ` */
65, /* 61 97 a */
66, /* 62 98 b */
67, /* 63 99 c */
68, /* 64 100 d */
69, /* 65 101 e */
70, /* 66 102 f */
71, /* 67 103 g */
72, /* 68 104 h */
73, /* 69 105 i */
74, /* 6A 106 j */
75, /* 6B 107 k */
76, /* 6C 108 l */
77, /* 6D 109 m */
78, /* 6E 110 n */
79, /* 6F 111 o */
80, /* 70 112 p */
81, /* 71 113 q */
82, /* 72 114 r */
83, /* 73 115 s */
84, /* 74 116 t */
85, /* 75 117 u */
86, /* 76 118 v */
87, /* 77 119 w */
88, /* 78 120 x */
89, /* 79 121 y */
90, /* 7A 122 z */
91, /* 7B 123 { */
92, /* 7C 124 | */
93, /* 7D 125 } */
94, /* 7E 126 ~ */
95, /* 7F 127  */
0, /* 80 128 ? */
0, /* 81 129 � */
0, /* 82 130 ? */
0, /* 83 131 ? */
0, /* 84 132 ? */
0, /* 85 133 ? */
0, /* 86 134 ? */
0, /* 87 135 ? */
0, /* 88 136 ? */
0, /* 89 137 ? */
0, /* 8A 138 ? */
0, /* 8B 139 ? */
0, /* 8C 140 ? */
0, /* 8D 141 � */
0, /* 8E 142 ? */
0, /* 8F 143 � */
0, /* 90 144 � */
0, /* 91 145 ? */
0, /* 92 146 ? */
0, /* 93 147 ? */
0, /* 94 148 ? */
0, /* 95 149 ? */
0, /* 96 150 ? */
0, /* 97 151 ? */
0, /* 98 152 ? */
0, /* 99 153 ? */
0, /* 9A 154 ? */
0, /* 9B 155 ? */
0, /* 9C 156 ? */
0, /* 9D 157 � */
0, /* 9E 158 ? */
0, /* 9F 159 ? */
0, /* A0 160 � */
0, /* A1 161 � */
0, /* A2 162 � */
0, /* A3 163 � */
0, /* A4 164 � */
0, /* A5 165 � */
0, /* A6 166 � */
0, /* A7 167 � */
0, /* A8 168 � */
0, /* A9 169 � */
0, /* AA 170 � */
0, /* AB 171 � */
0, /* AC 172 � */
0, /* AD 173 � */
0, /* AE 174 � */
0, /* AF 175 � */
0, /* B0 176 � */
0, /* B1 177 � */
0, /* B2 178 � */
0, /* B3 179 � */
0, /* B4 180 � */
0, /* B5 181 � */
0, /* B6 182 � */
0, /* B7 183 � */
0, /* B8 184 � */
0, /* B9 185 � */
0, /* BA 186 � */
0, /* BB 187 � */
0, /* BC 188 � */
0, /* BD 189 � */
0, /* BE 190 � */
0, /* BF 191 � */
0, /* C0 192 � */
0, /* C1 193 � */
0, /* C2 194 � */
0, /* C3 195 � */
0, /* C4 196 � */
0, /* C5 197 � */
0, /* C6 198 � */
0, /* C7 199 � */
0, /* C8 200 � */
0, /* C9 201 � */
0, /* CA 202 � */
0, /* CB 203 � */
0, /* CC 204 � */
0, /* CD 205 � */
0, /* CE 206 � */
0, /* CF 207 � */
0, /* D0 208 � */
0, /* D1 209 � */
0, /* D2 210 � */
0, /* D3 211 � */
0, /* D4 212 � */
0, /* D5 213 � */
0, /* D6 214 � */
0, /* D7 215 � */
0, /* D8 216 � */
0, /* D9 217 � */
0, /* DA 218 � */
0, /* DB 219 � */
0, /* DC 220 � */
0, /* DD 221 � */
0, /* DE 222 � */
0, /* DF 223 � */
0, /* E0 224 � */
0, /* E1 225 � */
0, /* E2 226 � */
0, /* E3 227 � */
0, /* E4 228 � */
0, /* E5 229 � */
0, /* E6 230 � */
0, /* E7 231 � */
0, /* E8 232 � */
0, /* E9 233 � */
0, /* EA 234 � */
0, /* EB 235 � */
0, /* EC 236 � */
0, /* ED 237 � */
0, /* EE 238 � */
0, /* EF 239 � */
0, /* F0 240 � */
0, /* F1 241 � */
0, /* F2 242 � */
0, /* F3 243 � */
0, /* F4 244 � */
0, /* F5 245 � */
0, /* F6 246 � */
0, /* F7 247 � */
0, /* F8 248 � */
0, /* F9 249 � */
0, /* FA 250 � */
0, /* FB 251 � */
0, /* FC 252 � */
0, /* FD 253 � */
0, /* FE 254 � */
0, /* FF 255 � */
};