118 lines
3.1 KiB
Arduino
118 lines
3.1 KiB
Arduino
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/**
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* \file MP3ButtonPlayer2.ino
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*
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* \brief Example sketch of using the MP3Shield Arduino driver using buttons,
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* with arduino recommended(simpler) debounce library
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* \remarks comments are implemented with Doxygen Markdown format
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*
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* \author Michael P. Flaga
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*
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* This sketch demonstrates the use of digital input pins used as buttons as
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* NEXT, PLAY and STOP to control the tracks that are to be played.
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* Where PLAY or STOP will begin or cancel the stream of track000.mp3 through
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* track999.mp3, as indexed by NEXT, begining with 0.
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* \note Use this example uses the bounce2 library to provide debouncing fuctions. Advocated by Arduino's website at http://playground.arduino.cc/code/bounce
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*/
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// libraries
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#include <SPI.h>
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#include <SdFat.h>
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#include <SdFatUtil.h>
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#include <SFEMP3Shield.h>
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#include <Bounce2.h>
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/**
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* \breif Macro for the debounced PLAY pin, with pull-up
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*/
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#define B_PLAY A0
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/**
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* \breif Macro for the Debounce Period [milliseconds]
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*/
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#define BUTTON_DEBOUNCE_PERIOD 20 //ms
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/**
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* \brief Object instancing the SdFat library.
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*
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* principal object for handling all SdCard functions.
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*/
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SdFat sd;
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/**
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* \brief Object instancing the SFEMP3Shield library.
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*
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* principal object for handling all the attributes, members and functions for the library.
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*/
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SFEMP3Shield MP3player;
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/**
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* \brief Object instancing the Play Button library.
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*/
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Bounce b_Play = Bounce();
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/**
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* \brief Index of the current track playing.
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*
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* Value indicates current playing track, used to populate "x" for playing the
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* filename of "track00x.mp3" for track000.mp3 through track254.mp3
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*/
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int8_t current_track = 0;
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//------------------------------------------------------------------------------
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/**
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* \brief Setup the Arduino Chip's feature for our use.
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*
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* After Arduino's kernel has booted initialize basic features for this
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* application, such as Serial port and MP3player objects with .begin.
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*/
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void setup() {
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Serial.begin(115200);
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pinMode(B_PLAY, INPUT_PULLUP);
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pinMode(5, OUTPUT);
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digitalWrite(5, HIGH);
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b_Play.attach(B_PLAY);
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b_Play.interval(BUTTON_DEBOUNCE_PERIOD);
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if(!sd.begin(9, SPI_HALF_SPEED)) sd.initErrorHalt();
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if (!sd.chdir("/")) sd.errorHalt("sd.chdir");
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MP3player.begin();
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MP3player.setVolume(10,10);
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Serial.println(F("Looking for Buttons to be depressed..."));
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}
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//------------------------------------------------------------------------------
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/**
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* \brief Main Loop the Arduino Chip
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*
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* This is called at the end of Arduino kernel's main loop before recycling.
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* And is where the user's is executed.
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*
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* \note If the means of refilling is not interrupt based then the
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* MP3player object is serviced with the availaible function.
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*/
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void loop() {
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// Below is only needed if not interrupt driven. Safe to remove if not using.
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#if defined(USE_MP3_REFILL_MEANS) \
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&& ( (USE_MP3_REFILL_MEANS == USE_MP3_SimpleTimer) \
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|| (USE_MP3_REFILL_MEANS == USE_MP3_Polled) )
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MP3player.available();
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#endif
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if (b_Play.update()) {
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if (b_Play.read() == LOW) {
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Serial.print(F("B_PLAY pressed, Start Playing Track # "));
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Serial.println(current_track);
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MP3player.playTrack(current_track);
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}
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}
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}
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