Wave Playback

Copy
1/*
2
3 This reads a wave file from an SD card and plays it using the I2S interface to
4
5 a MAX08357 I2S Amp Breakout board.
6
7 Circuit:
8
9 * Arduino Zero, MKRZero or MKR1000 board
10
11 * SD breakout or shield connected
12
13 * MAX08357:
14
15   * GND connected GND
16
17   * VIN connected 5V
18
19   * LRC connected to pin 0 (Zero) or pin 3 (MKR1000, MKRZero)
20
21   * BCLK connected to pin 1 (Zero) or pin 2 (MKR1000, MKRZero)
22
23   * DIN connected to pin 9 (Zero) or pin A6 (MKR1000, MKRZero)
24
25 created 15 November 2016
26
27 by Sandeep Mistry
28
29 */
30
31#include <SD.h>
32#include <ArduinoSound.h>
33
34// filename of wave file to play
35
36const char filename[] = "MUSIC.WAV";
37
38// variable representing the Wave File
39
40SDWaveFile waveFile;
41
42void setup() {
43
44  // Open serial communications and wait for port to open:
45
46  Serial.begin(9600);
47
48  while (!Serial) {
49
50    ; // wait for serial port to connect. Needed for native USB port only
51
52  }
53
54  // setup the SD card, depending on your shield of breakout board
55
56  // you may need to pass a pin number in begin for SS
57
58  Serial.print("Initializing SD card...");
59
60  if (!SD.begin()) {
61
62    Serial.println("initialization failed!");
63
64    return;
65
66  }
67
68  Serial.println("initialization done.");
69
70  // create a SDWaveFile
71
72  waveFile = SDWaveFile(filename);
73
74  // check if the WaveFile is valid
75
76  if (!waveFile) {
77
78    Serial.println("wave file is invalid!");
79
80    while (1); // do nothing
81
82  }
83
84  // print out some info. about the wave file
85
86  Serial.print("Bits per sample = ");
87
88  Serial.println(waveFile.bitsPerSample());
89
90  long channels = waveFile.channels();
91
92  Serial.print("Channels = ");
93
94  Serial.println(channels);
95
96  long sampleRate = waveFile.sampleRate();
97
98  Serial.print("Sample rate = ");
99
100  Serial.print(sampleRate);
101
102  Serial.println(" Hz");
103
104  long duration = waveFile.duration();
105
106  Serial.print("Duration = ");
107
108  Serial.print(duration);
109
110  Serial.println(" seconds");
111
112  // adjust the playback volume
113
114  AudioOutI2S.volume(5);
115
116  // check if the I2S output can play the wave file
117
118  if (!AudioOutI2S.canPlay(waveFile)) {
119
120    Serial.println("unable to play wave file using I2S!");
121
122    while (1); // do nothing
123
124  }
125
126  // start playback
127
128  Serial.println("starting playback");
129
130  AudioOutI2S.play(waveFile);
131}
132
133void loop() {
134
135  // check if playback is still going on
136
137  if (!AudioOutI2S.isPlaying()) {
138
139    // playback has stopped
140
141    Serial.println("playback stopped");
142
143    while (1); // do nothing
144
145  }
146}