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

// Пины SD-карты (согласно вашей схеме)
#define SD_CS    5
#define SD_SCK   12
#define SD_MOSI  11
#define SD_MISO  13

// Пины кнопок и переключателя
#define BTN_SCREEN_ON_OFF  21
#define BTN_PLAY_PAUSE     47
#define BTN_VOL_UP         48
#define BTN_VOL_DOWN       1
#define BTN_NEXT_PREV      3
#define SWITCH_TOUCH_LOCK  14

void setup() {
  Serial.begin(115200);
  delay(1000);
  Serial.println("\n=== START ===");

  // 1. Инициализация SD-карты
  SPI.begin(SD_SCK, SD_MISO, SD_MOSI);
  if (!SD.begin(SD_CS)) {
    Serial.println("SD Card ERROR!");
  } else {
    Serial.println("SD Card OK");
    File root = SD.open("/");
    Serial.println("Files on card:");
    while (true) {
      File entry = root.openNextFile();
      if (!entry) break;
      Serial.print("  ");
      Serial.println(entry.name());
      entry.close();
    }
    root.close();
  }

  // 2. Настройка кнопок (вход с подтяжкой к питанию)
  pinMode(BTN_SCREEN_ON_OFF, INPUT_PULLUP);
  pinMode(BTN_PLAY_PAUSE, INPUT_PULLUP);
  pinMode(BTN_VOL_UP, INPUT_PULLUP);
  pinMode(BTN_VOL_DOWN, INPUT_PULLUP);
  pinMode(BTN_NEXT_PREV, INPUT_PULLUP);
  pinMode(SWITCH_TOUCH_LOCK, INPUT_PULLUP);

  Serial.println("Ready. Press buttons...");
}

void loop() {
  // Читаем состояния (LOW = нажата)
  if (digitalRead(BTN_SCREEN_ON_OFF) == LOW) Serial.println("Screen ON/OFF");
  if (digitalRead(BTN_PLAY_PAUSE) == LOW) Serial.println("Play/Pause");
  if (digitalRead(BTN_VOL_UP) == LOW) Serial.println("Vol+");
  if (digitalRead(BTN_VOL_DOWN) == LOW) Serial.println("Vol-");
  if (digitalRead(BTN_NEXT_PREV) == LOW) Serial.println("Next/Prev (single)");
  if (digitalRead(SWITCH_TOUCH_LOCK) == LOW) 
    Serial.println("Touch LOCK ON");
  else 
    Serial.println("Touch LOCK OFF");

  delay(200);
}