Expected primary-expression before '.' token

Projects Programming
1

Hello, I am a student and I am trying to play an audio from an SD card using an Arduino MKR Zero that is connected to a speaker and button. This is only my second time using arduino and this error code keeps coming up: expected primary-expression before '.' token. It mainly happens on the line "while (AudioOut.isPlaying()) {". Any help would be appreciated. This is my code below:

#include <ArduinoSound.h>
#include <SD.h>
#include <SPI.h>

// Pin definitions
const int buttonPin = 2;
const int speakerPin = A0;

// Audio file
File audioFile;

// Button state
bool isPlaying = false;

void setup() {
  Serial.begin(9600);
  while (!Serial);

  // Initialize button pin
  pinMode(buttonPin, INPUT_PULLDOWN);

  // Initialize SD card
  if (!SD.begin(SDCARD_SS_PIN)) {
    Serial.println("SD card initialized failed!");
    while (1); // Stop execution if SD card fails
  }
  Serial.println("SD card initialized.");

  // Open the audio file on th SD card
  audioFile = SD.open("ele.wav");
  if (!audioFile) {
    Serial.println("Audio file not found!");
    while (1); // Stop execution if audio file fails
  }

  // Initialise the audio library
  if (!AudioOut.begin()) {
    Serial.println("AudioOut failed to initialize.");
    while (1); // Stop execution if AudioOut fails
  }

  Serial.println("Setup complete. Press the button to play audio.");
}

void loop() {
  // Read button state
  if (digitalRead(buttonPin) == HIGH && !isPlaying) {
    Serial.println("Button pressed. Playing audio...");
    isPlaying = true;

    // Play the audio file
    AudioOut.play(audioFile);

    // Wait for playback to finish
    while (AudioOut.isPlaying()) {
    delay(10); // Prevents other actions during playback
  }

  Serial.println("Playback finished.");
  audioFile.seek(0); // Reset file to the beginning
  isPlaying = false
  }
}
2

missing ending semicolon

1 Like
3

For a compile error post verbose compile log in code tags. The message may be some distance away from the offending line and takes experience to find them.

4

Your sketch doesn't declare an instance of the AudioOut class. It can't use the class itself. It's like trying to say int = 2 + 2; instead of int x = 2 + 2;.

Is this sketch something you wrote yourself, and if not, where did it come from?

5

OP hasn't been back since I got a 'like' right away. I suspect that was the compile problem, and they're still busy sorting the rest out.

6

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