/
7segment_arduino_with_potentiometer.ino
263 lines (244 loc) · 6.9 KB
/
7segment_arduino_with_potentiometer.ino
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
/* Multiplexed 4 digit 7-segment display driver
*
* A potentiometer is used to adjust digit update interval
* from 1 to 250 milliseconds
*
* More information:
* https://www.onetransistor.eu/2018/12/drive-multiplexed-7segment-display.html
* https://www.onetransistor.eu/2018/12/wiring-of-4digit-7segment-display.html
* https://youtu.be/kiNet0rdaZU
*/
// invert these definitions for common cathode display
#define LED_ON LOW
#define LED_OFF HIGH
// adjust this if you wire display in a different way
#define SEG_A 2
#define SEG_B 3
#define SEG_C 4
#define SEG_D 5
#define SEG_E 6
#define SEG_F 7
#define SEG_G 8
#define SEG_P 9
#define DIG_1 10
#define DIG_2 11
#define DIG_3 12
#define DIG_4 13
char c_digit;
uint16_t number = 1240;
byte base = 10;
unsigned long lastRefresh = 0;
unsigned long numberIncTime = 0;
unsigned int interval;
void displayDigit(uint16_t digit, bool dp = false) {
digit %= base;
switch (digit) {
case 0:
digitalWrite(SEG_A, LED_ON);
digitalWrite(SEG_B, LED_ON);
digitalWrite(SEG_C, LED_ON);
digitalWrite(SEG_D, LED_ON);
digitalWrite(SEG_E, LED_ON);
digitalWrite(SEG_F, LED_ON);
digitalWrite(SEG_G, LED_OFF);
break;
case 1:
digitalWrite(SEG_A, LED_OFF);
digitalWrite(SEG_B, LED_ON);
digitalWrite(SEG_C, LED_ON);
digitalWrite(SEG_D, LED_OFF);
digitalWrite(SEG_E, LED_OFF);
digitalWrite(SEG_F, LED_OFF);
digitalWrite(SEG_G, LED_OFF);
break;
case 2:
digitalWrite(SEG_A, LED_ON);
digitalWrite(SEG_B, LED_ON);
digitalWrite(SEG_C, LED_OFF);
digitalWrite(SEG_D, LED_ON);
digitalWrite(SEG_E, LED_ON);
digitalWrite(SEG_F, LED_OFF);
digitalWrite(SEG_G, LED_ON);
break;
case 3:
digitalWrite(SEG_A, LED_ON);
digitalWrite(SEG_B, LED_ON);
digitalWrite(SEG_C, LED_ON);
digitalWrite(SEG_D, LED_ON);
digitalWrite(SEG_E, LED_OFF);
digitalWrite(SEG_F, LED_OFF);
digitalWrite(SEG_G, LED_ON);
break;
case 4:
digitalWrite(SEG_A, LED_OFF);
digitalWrite(SEG_B, LED_ON);
digitalWrite(SEG_C, LED_ON);
digitalWrite(SEG_D, LED_OFF);
digitalWrite(SEG_E, LED_OFF);
digitalWrite(SEG_F, LED_ON);
digitalWrite(SEG_G, LED_ON);
break;
case 5:
digitalWrite(SEG_A, LED_ON);
digitalWrite(SEG_B, LED_OFF);
digitalWrite(SEG_C, LED_ON);
digitalWrite(SEG_D, LED_ON);
digitalWrite(SEG_E, LED_OFF);
digitalWrite(SEG_F, LED_ON);
digitalWrite(SEG_G, LED_ON);
break;
case 6:
digitalWrite(SEG_A, LED_ON);
digitalWrite(SEG_B, LED_OFF);
digitalWrite(SEG_C, LED_ON);
digitalWrite(SEG_D, LED_ON);
digitalWrite(SEG_E, LED_ON);
digitalWrite(SEG_F, LED_ON);
digitalWrite(SEG_G, LED_ON);
break;
case 7:
digitalWrite(SEG_A, LED_ON);
digitalWrite(SEG_B, LED_ON);
digitalWrite(SEG_C, LED_ON);
digitalWrite(SEG_D, LED_OFF);
digitalWrite(SEG_E, LED_OFF);
digitalWrite(SEG_F, LED_OFF);
digitalWrite(SEG_G, LED_OFF);
break;
case 8:
digitalWrite(SEG_A, LED_ON);
digitalWrite(SEG_B, LED_ON);
digitalWrite(SEG_C, LED_ON);
digitalWrite(SEG_D, LED_ON);
digitalWrite(SEG_E, LED_ON);
digitalWrite(SEG_F, LED_ON);
digitalWrite(SEG_G, LED_ON);
break;
case 9:
digitalWrite(SEG_A, LED_ON);
digitalWrite(SEG_B, LED_ON);
digitalWrite(SEG_C, LED_ON);
digitalWrite(SEG_D, LED_ON);
digitalWrite(SEG_E, LED_OFF);
digitalWrite(SEG_F, LED_ON);
digitalWrite(SEG_G, LED_ON);
break;
case 10: // hex digit A
digitalWrite(SEG_A, LED_ON);
digitalWrite(SEG_B, LED_ON);
digitalWrite(SEG_C, LED_ON);
digitalWrite(SEG_D, LED_OFF);
digitalWrite(SEG_E, LED_ON);
digitalWrite(SEG_F, LED_ON);
digitalWrite(SEG_G, LED_ON);
break;
case 11: // hex digit B
digitalWrite(SEG_A, LED_OFF);
digitalWrite(SEG_B, LED_OFF);
digitalWrite(SEG_C, LED_ON);
digitalWrite(SEG_D, LED_ON);
digitalWrite(SEG_E, LED_ON);
digitalWrite(SEG_F, LED_ON);
digitalWrite(SEG_G, LED_ON);
break;
case 12: // hex digit C
digitalWrite(SEG_A, LED_ON);
digitalWrite(SEG_B, LED_OFF);
digitalWrite(SEG_C, LED_OFF);
digitalWrite(SEG_D, LED_ON);
digitalWrite(SEG_E, LED_ON);
digitalWrite(SEG_F, LED_ON);
digitalWrite(SEG_G, LED_OFF);
break;
case 13: // hex digit D
digitalWrite(SEG_A, LED_OFF);
digitalWrite(SEG_B, LED_ON);
digitalWrite(SEG_C, LED_ON);
digitalWrite(SEG_D, LED_ON);
digitalWrite(SEG_E, LED_ON);
digitalWrite(SEG_F, LED_OFF);
digitalWrite(SEG_G, LED_ON);
break;
case 14: // hex digit E
digitalWrite(SEG_A, LED_ON);
digitalWrite(SEG_B, LED_OFF);
digitalWrite(SEG_C, LED_OFF);
digitalWrite(SEG_D, LED_ON);
digitalWrite(SEG_E, LED_ON);
digitalWrite(SEG_F, LED_ON);
digitalWrite(SEG_G, LED_ON);
break;
case 15: // hex digit F
digitalWrite(SEG_A, LED_ON);
digitalWrite(SEG_B, LED_OFF);
digitalWrite(SEG_C, LED_OFF);
digitalWrite(SEG_D, LED_OFF);
digitalWrite(SEG_E, LED_ON);
digitalWrite(SEG_F, LED_ON);
digitalWrite(SEG_G, LED_ON);
break;
}
dp ? digitalWrite(SEG_P, LED_ON) : digitalWrite(SEG_P, LED_OFF);
}
void refreshDisplay() {
switch (c_digit) {
case 3:
digitalWrite(DIG_1, LED_OFF);
digitalWrite(DIG_2, LED_OFF);
digitalWrite(DIG_3, LED_OFF);
displayDigit(number);
digitalWrite(DIG_4, LED_ON);
break;
case 2:
digitalWrite(DIG_1, LED_OFF);
digitalWrite(DIG_2, LED_OFF);
digitalWrite(DIG_4, LED_OFF);
displayDigit(number / base);
digitalWrite(DIG_3, LED_ON);
break;
case 1:
digitalWrite(DIG_1, LED_OFF);
digitalWrite(DIG_3, LED_OFF);
digitalWrite(DIG_4, LED_OFF);
displayDigit(number / base / base);
digitalWrite(DIG_2, LED_ON);
break;
case 0:
digitalWrite(DIG_2, LED_OFF);
digitalWrite(DIG_3, LED_OFF);
digitalWrite(DIG_4, LED_OFF);
displayDigit(number / base / base / base);
digitalWrite(DIG_1, LED_ON);
break;
}
c_digit++;
if (c_digit == 4) c_digit = 0;
}
void setup() {
pinMode(SEG_A, OUTPUT);
pinMode(SEG_B, OUTPUT);
pinMode(SEG_C, OUTPUT);
pinMode(SEG_D, OUTPUT);
pinMode(SEG_E, OUTPUT);
pinMode(SEG_F, OUTPUT);
pinMode(SEG_G, OUTPUT);
pinMode(SEG_P, OUTPUT);
pinMode(DIG_1, OUTPUT);
pinMode(DIG_2, OUTPUT);
pinMode(DIG_3, OUTPUT);
pinMode(DIG_4, OUTPUT);
pinMode(A0, INPUT);
}
void loop() {
unsigned long current = millis();
if (current >= lastRefresh + interval) {
refreshDisplay();
lastRefresh = current;
interval = analogRead(A0);
interval /= 4;
}
if (current >= numberIncTime + 1000) {
number++;
numberIncTime = current;
}
}