mirror of https://github.com/noisymime/Arduino.git
85 lines
1.8 KiB
C++
85 lines
1.8 KiB
C++
/*
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Simple Audio Player
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Demonstrates the use of the Audio library for the Arduino Due
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Hardware required :
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* Arduino shield with a SD card on CS4
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* A sound file named "test.wav" in the root directory of the SD card
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* An audio amplifier to connect to the DAC0 and ground
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* A speaker to connect to the audio amplifier
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Original by Massimo Banzi September 20, 2012
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Modified by Scott Fitzgerald October 19, 2012
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This example code is in the public domain
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http://arduino.cc/en/Tutorial/SimpleAudioPlayer
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*/
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#include <SD.h>
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#include <SPI.h>
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#include <Audio.h>
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void setup()
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{
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// debug output at 9600 baud
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Serial.begin(9600);
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// setup SD-card
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Serial.print("Initializing SD card...");
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if (!SD.begin(4)) {
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Serial.println(" failed!");
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return;
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}
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Serial.println(" done.");
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// hi-speed SPI transfers
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SPI.setClockDivider(4);
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// 44100Khz stereo => 88200 sample rate
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// 100 mSec of prebuffering.
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Audio.begin(88200, 100);
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}
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void loop()
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{
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int count = 0;
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// open wave file from sdcard
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File myFile = SD.open("test.wav");
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if (!myFile) {
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// if the file didn't open, print an error and stop
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Serial.println("error opening test.wav");
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while (true);
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}
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const int S = 1024; // Number of samples to read in block
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short buffer[S];
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Serial.print("Playing");
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// until the file is not finished
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while (myFile.available()) {
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// read from the file into buffer
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myFile.read(buffer, sizeof(buffer));
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// Prepare samples
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int volume = 1024;
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Audio.prepare(buffer, S, volume);
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// Feed samples to audio
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Audio.write(buffer, S);
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// Every 100 block print a '.'
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count++;
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if (count == 100) {
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Serial.print(".");
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count = 0;
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}
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}
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myFile.close();
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Serial.println("End of file. Thank you for listening!");
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while (true) ;
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}
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