Example4 Qwiic Twist

examples/Example4_QwiicTwist/Example4_QwiicTwist.ino

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+/******************************************************************************
+  Example4_QwiicTwist.ino
+
+  This example shows how to use the Audio Player Breakout with the Qwiic Twist.
+  Load your uSD card up with some sound files (MP3 or WAV).
+  Wire up the Qwiic Twist and the Mono Audio Amp.
+  Press the Qwiic Twist to play the selected track number.
+  Rotate the Qwiic Twist to change the track number.
+  Watch the serial monitor for feedback.
+
+  Development environment specifics:
+	IDE: Arduino 2.3.6
+	Hardware Platform: SparkFun Redboard Qwiic
+
+  By: Pete Lewis, Nathan Seidle
+  SparkFun Electronics
+  Date: May 5th, 2025
+  License: MIT. See license file for more information but you can
+  basically do whatever you want with this code.
+
+  Hardware Connections:
+  Use a qwiic cable to connect from the Redboard Qwiic to the Qwiic Twist.
+  Connect audio-in, speakers, and power to the Mono Audio Amp.
+
+  Feel like supporting our work? Buy a board from SparkFun!
+  MY1690X Serial MP3 Player Shield: https://www.sparkfun.com/sparkfun-serial-mp3-player-shield-my1690x.html
+  MY1690X Audio Player Breakout: https://www.sparkfun.com/sparkfun-audio-player-breakout-my1690x-16s.html
+
+  Hardware Connections:
+  MY1690 Pin -> Arduino Pin
+  -------------------------------------
+  TXO -> 8
+  RXI -> 9
+  VIN -> 5V
+  GND -> GND
+******************************************************************************/
+
+#include <Wire.h>
+#include "SparkFun_MY1690_MP3_Library.h" // Click here to get the library: http://librarymanager/All#SparkFun_MY1690
+
+//For boards that support software serial
+#include "SoftwareSerial.h"
+SoftwareSerial serialMP3(8, 9); //RX on Arduino connected to TX on MY1690's, TX on Arduino connected to the MY1690's RX pin
+
+//For boards that have multiple hardware serial ports
+//HardwareSerial serialMP3(2); //Create serial port on ESP32: TX on 17, RX on 16
+
+SparkFunMY1690 myMP3;
+
+int songCount; //Number of songs on the SD card
+
+#include "SparkFun_Qwiic_Twist_Arduino_Library.h" //Click here to get the library: http://librarymanager/All#SparkFun_Twist
+TWIST twist;                                      //Create instance of this object
+
+int user_track_number = 1;
+int user_track_number_previous = 1;
+
+void setup()
+{
+  Serial.begin(115200);
+  Serial.println("Example 4 - Control sound playback with a Qwiic Twist");
+
+  Wire.begin();
+
+  if (twist.begin() == false)
+  {
+    Serial.println("Twist does not appear to be connected. Please check wiring. Freezing...");
+  }
+
+  // reset twist count to 1
+  twist.setCount(1);
+
+  serialMP3.begin(9600); //The MY1690 expects serial communication at 9600bps
+
+  if (myMP3.begin(serialMP3) == false) // Beginning the MP3 player requires a serial port (either hardware or software)
+  {
+    Serial.println(F("MY1690 Device not detected. Check wiring. Freezing."));
+    while (1);
+  }
+
+  songCount = myMP3.getSongCount();
+  if (songCount == 0)
+  {
+    Serial.println(F("Oh no! No songs found. Make sure the SD card is inserted and there are MP3s on it. Freezing."));
+    while (1);
+  }
+
+  Serial.print(F("Number of tracks on SD card: "));
+  Serial.println(songCount);
+
+  Serial.print(F("MY1690 Version: "));
+  Serial.println(myMP3.getVersion());
+
+  myMP3.play(); //Will play the lowest numbered song in the folder
+
+  myMP3.setVolume(30); //30 is loudest. 5 is comfortable with headphones. 0 is mute.
+
+  Serial.print(F("Volume: "));
+  Serial.println(myMP3.getVolume());
+
+  myMP3.setPlayModeNoLoop();
+}
+
+void loop()
+{
+    if (twist.isPressed())
+    {
+      Serial.print(" Pressed! Playing track number: ");
+      Serial.println(user_track_number);
+      myMP3.playTrackNumber(user_track_number);
+      delay(500);
+    }
+
+    user_track_number = twist.getCount();
+
+    if (user_track_number > songCount) // limit max track number to song count
+    {
+      user_track_number = songCount;
+      twist.setCount(user_track_number); // reset twist count to track number
+    }
+    else if (user_track_number < 1) // limit min track number to 1
+    {
+      user_track_number = 1;
+      twist.setCount(user_track_number); // reset twist count to track number
+    }
+
+    // check if the user has changed the track number
+    if (user_track_number != user_track_number_previous)
+    {
+      user_track_number_previous = user_track_number;
+      Serial.print("user_track_number: ");
+      Serial.println(user_track_number);
+    }
+    delay(10);
+}