arduino电子琴(2015-11-04)

 1 // ----------------------------------------------------------------------------
 2 // elecKeyboard.ino
 3 //
 4 // Created 2015-11-04
 5 // By seesea <seesea2517#gmail#com>
 6 //
 7 // 模拟电子琴
 8 // 七个按键为 1 2 3 4 5 6 7
 9 // 加两个按键控制升降一个八度
10 // ----------------------------------------------------------------------------
11 
12 #include "pitches.h"
13 
14 #define BASS 0  // 低音
15 #define ALTO 1  // 中音
16 #define ALTA 2  // 高音
17 
18 byte keyOttavaBassa = 2;                    // 低八度变换按键
19 byte keyOttavaAlta  = 3;                    // 高八度变换按键
20 byte keyboard[] = { 4, 5, 6, 7, 8, 9, 10 }; // 七个音阶键
21 byte pinBuzzer  = 12;                       // 蜂鸣器
22 byte pinLED     = 13;                       // 灯光显示
23 
24 char keyNum = sizeof(keyboard) / sizeof(keyboard[0]);
25 
26 unsigned int notes[][7] = {
27         { NOTE_C4, NOTE_D4, NOTE_E4, NOTE_F4, NOTE_G4, NOTE_A4, NOTE_B4 },  // 低音
28         { NOTE_C5, NOTE_D5, NOTE_E5, NOTE_F5, NOTE_G5, NOTE_A5, NOTE_B5 },  // 中音
29         { NOTE_C6, NOTE_D6, NOTE_E6, NOTE_F6, NOTE_G6, NOTE_A6, NOTE_B6 },  // 高音-------
30     };
31 
32 void setup()
33 {
34     pinMode(keyOttavaBassa, INPUT_PULLUP);
35     pinMode(keyOttavaAlta,  INPUT_PULLUP);
36     for (char i = 0; i < keyNum; ++i)
37     {
38         pinMode(keyboard[i], INPUT_PULLUP);
39     }
40 
41     pinMode(pinLED, OUTPUT);
42 }
43 
44 void loop()
45 {
46     int key = getKeyDown();
47 
48     if (key < 0)
49     {
50         noTone(pinBuzzer);
51         digitalWrite(pinLED, LOW);
52         return;
53     }
54 
55     tone(pinBuzzer, notes[getToneLevel()][key]);
56     digitalWrite(pinLED, HIGH);
57 }
58 
59 // 根据音调按键来获得当前的音调高度
60 char getToneLevel()
61 {
62     if (digitalRead(keyOttavaBassa) == LOW)
63         return BASS;
64 
65     if (digitalRead(keyOttavaAlta) == LOW)
66         return ALTA;
67 
68     return ALTO;
69 }
70 
71 // 获取按下的音阶按键
72 // 以 0 - 6 为音阶 1 - 7
73 // 没有按下的话返回 -1
74 char getKeyDown()
75 {
76     for (char i = 0; i < keyNum; ++i)
77     {
78         if (digitalRead(keyboard[i]) == LOW)
79             return i;
80     }
81 
82     return -1;
83 }

 1 /*************************************************
 2  * Public Constants
 3  *************************************************/
 4 
 5 #define NOTE_B0  31
 6 #define NOTE_C1  33
 7 #define NOTE_CS1 35
 8 #define NOTE_D1  37
 9 #define NOTE_DS1 39
10 #define NOTE_E1  41
11 #define NOTE_F1  44
12 #define NOTE_FS1 46
13 #define NOTE_G1  49
14 #define NOTE_GS1 52
15 #define NOTE_A1  55
16 #define NOTE_AS1 58
17 #define NOTE_B1  62
18 #define NOTE_C2  65
19 #define NOTE_CS2 69
20 #define NOTE_D2  73
21 #define NOTE_DS2 78
22 #define NOTE_E2  82
23 #define NOTE_F2  87
24 #define NOTE_FS2 93
25 #define NOTE_G2  98
26 #define NOTE_GS2 104
27 #define NOTE_A2  110
28 #define NOTE_AS2 117
29 #define NOTE_B2  123
30 #define NOTE_C3  131
31 #define NOTE_CS3 139
32 #define NOTE_D3  147
33 #define NOTE_DS3 156
34 #define NOTE_E3  165
35 #define NOTE_F3  175
36 #define NOTE_FS3 185
37 #define NOTE_G3  196
38 #define NOTE_GS3 208
39 #define NOTE_A3  220
40 #define NOTE_AS3 233
41 #define NOTE_B3  247
42 #define NOTE_C4  262
43 #define NOTE_CS4 277
44 #define NOTE_D4  294
45 #define NOTE_DS4 311
46 #define NOTE_E4  330
47 #define NOTE_F4  349
48 #define NOTE_FS4 370
49 #define NOTE_G4  392
50 #define NOTE_GS4 415
51 #define NOTE_A4  440
52 #define NOTE_AS4 466
53 #define NOTE_B4  494
54 #define NOTE_C5  523
55 #define NOTE_CS5 554
56 #define NOTE_D5  587
57 #define NOTE_DS5 622
58 #define NOTE_E5  659
59 #define NOTE_F5  698
60 #define NOTE_FS5 740
61 #define NOTE_G5  784
62 #define NOTE_GS5 831
63 #define NOTE_A5  880
64 #define NOTE_AS5 932
65 #define NOTE_B5  988
66 #define NOTE_C6  1047
67 #define NOTE_CS6 1109
68 #define NOTE_D6  1175
69 #define NOTE_DS6 1245
70 #define NOTE_E6  1319
71 #define NOTE_F6  1397
72 #define NOTE_FS6 1480
73 #define NOTE_G6  1568
74 #define NOTE_GS6 1661
75 #define NOTE_A6  1760
76 #define NOTE_AS6 1865
77 #define NOTE_B6  1976
78 #define NOTE_C7  2093
79 #define NOTE_CS7 2217
80 #define NOTE_D7  2349
81 #define NOTE_DS7 2489
82 #define NOTE_E7  2637
83 #define NOTE_F7  2794
84 #define NOTE_FS7 2960
85 #define NOTE_G7  3136
86 #define NOTE_GS7 3322
87 #define NOTE_A7  3520
88 #define NOTE_AS7 3729
89 #define NOTE_B7  3951
90 #define NOTE_C8  4186
91 #define NOTE_CS8 4435
92 #define NOTE_D8  4699
93 #define NOTE_DS8 4978