SdFat/examples/OpenNext/OpenNext.ino

/*
 * Print size, modify date/time, and name for all files in root.
 */
#include <SPI.h>
#include "SdFat.h"

// SD default chip select pin.
const uint8_t chipSelect = SS;

// file system object
SdFat sd;

SdFile root;
SdFile file;
//------------------------------------------------------------------------------
void setup() {
  Serial.begin(9600);
  
  // Wait for USB Serial 
  while (!Serial) {
    SysCall::yield();
  }
  
  Serial.println("Type any character to start");
  while (!Serial.available()) {
    SysCall::yield();
  }

  // Initialize at the highest speed supported by the board that is
  // not over 50 MHz. Try a lower speed if SPI errors occur.
  if (!sd.begin(chipSelect, SD_SCK_MHZ(50))) {
    sd.initErrorHalt();
  }
  if (!root.open("/")) {
    sd.errorHalt("open root failed");
  }
  // Open next file in root.
  // Warning, openNext starts at the current directory position
  // so a rewind of the directory may be required.
  while (file.openNext(&root, O_RDONLY)) {
    file.printFileSize(&Serial);
    Serial.write(' ');
    file.printModifyDateTime(&Serial);
    Serial.write(' ');
    file.printName(&Serial);
    if (file.isDir()) {
      // Indicate a directory.
      Serial.write('/');
    }
    Serial.println();
    file.close();
  }
  if (root.getError()) {
    Serial.println("openNext failed");
  } else {
    Serial.println("Done!");
  }
}
//------------------------------------------------------------------------------
void loop() {}