/*
 * Simple Wokwi Microphone Demo
 */

#include <SD.h>
File myFile;
// change this to match your SD shield or module;
const int chipSelect = 10;

void setup() {
  Serial.begin(115200);
  pinMode(5, OUTPUT);

  if (SD.begin())  {
    Serial.println("SD card is initialized. Ready to go");
  } 
  else  {
    Serial.println("Failed");
    return;
  }

  myFile = SD.open("audio.txt", FILE_WRITE);

  // if the file opened okay, write to it:
  if (myFile) {
    myFile.println("Audio Buffer"); // SD CARD SAVE
    // close the file:
    myFile.close();
    Serial.println("Done");
  } else {
    // if the file didn't open, print an error:
    Serial.println("Error opening audio.txt");
  }

}

void loop(){
  myFile = SD.open("audio.txt", FILE_WRITE);
  if (myFile)  {
    record();
  }
  else  {
    Serial.println("Error opening file");
  }
  delay(10000);
}


void record() {
  int timer=0;
  while(timer<100000){
    int sample = analogRead(A0);
    myFile.println(sample);
    Serial.println(sample);
    digitalWrite(13, abs(sample - 512) > 50);
    timer=timer+1;
    delay(1);
  }
  myFile.flush();
  myFile.close();
}