AceSegment  0.7.0
A framework for rendering seven segment LED displays using the TM1637, MAX7219, HT16K33, or 74HC595 controller chips
CharWriter.cpp
1 /*
2 MIT License
3 
4 Copyright (c) 2018 Brian T. Park
5 
6 Permission is hereby granted, free of charge, to any person obtaining a copy
7 of this software and associated documentation files (the "Software"), to deal
8 in the Software without restriction, including without limitation the rights
9 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 copies of the Software, and to permit persons to whom the Software is
11 furnished to do so, subject to the following conditions:
12 
13 The above copyright notice and this permission notice shall be included in all
14 copies or substantial portions of the Software.
15 
16 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 SOFTWARE.
23 */
24 
25 #include <Arduino.h>
26 #include "CharWriter.h"
27 
28 namespace ace_segment {
29 
30 // A poor-man's '?': 0b10000011
31 //static const uint8_t UNKNOWN = 0b10000011;
32 
33 // Set unknown character to be blank. The problem with '?' is that some LED
34 // modules don't have an active decimal point on all digits, so the '?' does not
35 // look right.
36 static const uint8_t UNKNOWN = 0b00000000;
37 
38 // Bit patterns for ASCII characters (0 - 127).
39 // Adapted from https://github.com/dmadison/LED-Segment-ASCII.
40 //
41 // 7-segment map:
42 // AAA 000
43 // F B 5 1
44 // F B 5 1
45 // GGG 666
46 // E C 4 2
47 // E C 4 2
48 // DDD DP 333 77
49 //
50 // Segment: DP G F E D C B A
51 // Bits: 7 6 5 4 3 2 1 0
52 //
53 const uint8_t CharWriter::kCharPatterns[] PROGMEM = {
54  UNKNOWN, /* 00 */
55  UNKNOWN, /* 01 */
56  UNKNOWN, /* 02 */
57  UNKNOWN, /* 03 */
58  UNKNOWN, /* 04 */
59  UNKNOWN, /* 05 */
60  UNKNOWN, /* 06 */
61  UNKNOWN, /* 07 */
62  UNKNOWN, /* 08 */
63  UNKNOWN, /* 09 */
64  UNKNOWN, /* 10 */
65  UNKNOWN, /* 11 */
66  UNKNOWN, /* 12 */
67  UNKNOWN, /* 13 */
68  UNKNOWN, /* 14 */
69  UNKNOWN, /* 15 */
70  UNKNOWN, /* 16 */
71  UNKNOWN, /* 17 */
72  UNKNOWN, /* 18 */
73  UNKNOWN, /* 19 */
74  UNKNOWN, /* 20 */
75  UNKNOWN, /* 21 */
76  UNKNOWN, /* 22 */
77  UNKNOWN, /* 23 */
78  UNKNOWN, /* 24 */
79  UNKNOWN, /* 25 */
80  UNKNOWN, /* 26 */
81  UNKNOWN, /* 27 */
82  UNKNOWN, /* 28 */
83  UNKNOWN, /* 29 */
84  UNKNOWN, /* 30 */
85  UNKNOWN, /* 31 */
86  0b00000000, /* (space) */
87  0b10000110, /* ! */
88  0b00100010, /* " */
89  0b01111110, /* # */
90  0b01101101, /* $ */
91  0b11010010, /* % */
92  0b01000110, /* & */
93  0b00100000, /* ' */
94  0b00101001, /* ( */
95  0b00001011, /* ) */
96  0b00100001, /* * */
97  0b01110000, /* + */
98  0b00010000, /* , */
99  0b01000000, /* - */
100  0b10000000, /* . */
101  0b01010010, /* / */
102  0b00111111, /* 0 */
103  0b00000110, /* 1 */
104  0b01011011, /* 2 */
105  0b01001111, /* 3 */
106  0b01100110, /* 4 */
107  0b01101101, /* 5 */
108  0b01111101, /* 6 */
109  0b00000111, /* 7 */
110  0b01111111, /* 8 */
111  0b01101111, /* 9 */
112  0b00001001, /* : */
113  0b00001101, /* ; */
114  0b01100001, /* < */
115  0b01001000, /* = */
116  0b01000011, /* > */
117  0b11010011, /* ? */
118  0b01011111, /* @ */
119  0b01110111, /* A */
120  0b01111100, /* B */
121  0b00111001, /* C */
122  0b01011110, /* D */
123  0b01111001, /* E */
124  0b01110001, /* F */
125  0b00111101, /* G */
126  0b01110110, /* H */
127  0b00110000, /* I */
128  0b00011110, /* J */
129  0b01110101, /* K */
130  0b00111000, /* L */
131  0b00010101, /* M */
132  0b00110111, /* N */
133  0b00111111, /* O */
134  0b01110011, /* P */
135  0b01101011, /* Q */
136  0b00110011, /* R */
137  0b01101101, /* S */
138  0b01111000, /* T */
139  0b00111110, /* U */
140  0b00111110, /* V */
141  0b00101010, /* W */
142  0b01110110, /* X */
143  0b01101110, /* Y */
144  0b01011011, /* Z */
145  0b00111001, /* [ */
146  0b01100100, /* \ */
147  0b00001111, /* ] */
148  0b00100011, /* ^ */
149  0b00001000, /* _ */
150  0b00000010, /* ` */
151  0b01011111, /* a */
152  0b01111100, /* b */
153  0b01011000, /* c */
154  0b01011110, /* d */
155  0b01111011, /* e */
156  0b01110001, /* f */
157  0b01101111, /* g */
158  0b01110100, /* h */
159  0b00010000, /* i */
160  0b00001100, /* j */
161  0b01110101, /* k */
162  0b00110000, /* l */
163  0b00010100, /* m */
164  0b01010100, /* n */
165  0b01011100, /* o */
166  0b01110011, /* p */
167  0b01100111, /* q */
168  0b01010000, /* r */
169  0b01101101, /* s */
170  0b01111000, /* t */
171  0b00011100, /* u */
172  0b00011100, /* v */
173  0b00010100, /* w */
174  0b01110110, /* x */
175  0b01101110, /* y */
176  0b01011011, /* z */
177  0b01000110, /* { */
178  0b00110000, /* | */
179  0b01110000, /* } */
180  0b00000001, /* ~ */
181  UNKNOWN, /* (del) */
182 };
183 
184 uint8_t CharWriter::getPattern(char c) const {
185  uint8_t pattern = ((mNumChars == 0) || ((uint8_t) c < mNumChars))
186  ? pgm_read_byte(&mCharPatterns[(uint8_t) c])
187  : UNKNOWN;
188  return pattern;
189 }
190 
191 void CharWriter::writeCharAt(uint8_t pos, char c) {
192  if (pos >= mPatternWriter.getNumDigits()) return;
193  mPatternWriter.writePatternAt(pos, getPattern(c));
194 }
195 
196 }
ace_segment::PatternWriter::writePatternAt
void writePatternAt(uint8_t pos, uint8_t pattern)
Write the pattern for a given pos.
Definition: PatternWriter.h:61
ace_segment::CharWriter::writeCharAt
void writeCharAt(uint8_t pos, char c)
Write the character at the specified position.
Definition: CharWriter.cpp:191
ace_segment::CharWriter::getPattern
uint8_t getPattern(char c) const
Get segment pattern for character 'c'.
Definition: CharWriter.cpp:184
ace_segment::PatternWriter::getNumDigits
uint8_t getNumDigits() const
Return the number of digits supported by this display instance.
Definition: PatternWriter.h:55