3.5 inch TFT LCD Shield

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

// Canonical beginner sketch for a 3.5 inch TFT LCD Shield wired to an Arduino Uno.
// This example demonstrates using the microSD slot with the built-in SD library.
// The TFT control/data pins are shown in the wiring block, but the sketch keeps the
// example simple by focusing on the shield's SD card interface.

const uint8_t SD_CS_PIN = 10;

void printDirectory(File dir, int numTabs) {
  while (true) {
    File entry = dir.openNextFile();
    if (!entry) {
      break;
    }

    for (int i = 0; i < numTabs; i++) {
      Serial.print('\t');
    }
    Serial.print(entry.name());
    if (entry.isDirectory()) {
      Serial.println('/');
      printDirectory(entry, numTabs + 1);
    } else {
      Serial.print('\t');
      Serial.println(entry.size(), DEC);
    }
    entry.close();
  }
}

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

  Serial.println(F("3.5 inch TFT LCD Shield - SD card example"));
  Serial.print(F("Initializing SD card on CS pin D"));
  Serial.println(SD_CS_PIN);

  if (!SD.begin(SD_CS_PIN)) {
    Serial.println(F("SD card initialization failed!"));
    Serial.println(F("Check power, wiring, and that a card is inserted."));
    while (true) {
      delay(1000);
    }
  }

  Serial.println(F("SD card initialized successfully."));

  File root = SD.open("/");
  if (root) {
    Serial.println(F("Files on the card:"));
    printDirectory(root, 0);
    root.close();
  } else {
    Serial.println(F("Could not open root directory."));
  }
}

void loop() {
  // Nothing to do here for this basic example.
  delay(1000);
}