SdFat/examples/OpenNext/OpenNext.ino

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

// SD_FAT_TYPE = 0 for SdFat/File as defined in SdFatConfig.h,
// 1 for FAT16/FAT32, 2 for exFAT, 3 for FAT16/FAT32 and exFAT.
#define SD_FAT_TYPE 0
/*
  Change the value of SD_CS_PIN if you are using SPI and
  your hardware does not use the default value, SS.
  Common values are:
  Arduino Ethernet shield: pin 4
  Sparkfun SD shield: pin 8
  Adafruit SD shields and modules: pin 10
*/

// SDCARD_SS_PIN is defined for the built-in SD on some boards.
#ifndef SDCARD_SS_PIN
const uint8_t SD_CS_PIN = SS;
#else   // SDCARD_SS_PIN
// Assume built-in SD is used.
const uint8_t SD_CS_PIN = SDCARD_SS_PIN;
#endif  // SDCARD_SS_PIN

// Try max SPI clock for an SD. Reduce SPI_CLOCK if errors occur.
#define SPI_CLOCK SD_SCK_MHZ(50)

// Try to select the best SD card configuration.
#if HAS_SDIO_CLASS
#define SD_CONFIG SdioConfig(FIFO_SDIO)
#elif ENABLE_DEDICATED_SPI
#define SD_CONFIG SdSpiConfig(SD_CS_PIN, DEDICATED_SPI, SPI_CLOCK)
#else  // HAS_SDIO_CLASS
#define SD_CONFIG SdSpiConfig(SD_CS_PIN, SHARED_SPI, SPI_CLOCK)
#endif  // HAS_SDIO_CLASS

#if SD_FAT_TYPE == 0
SdFat sd;
File dir;
File file;
#elif SD_FAT_TYPE == 1
SdFat32 sd;
File32 dir;
File32 file;
#elif SD_FAT_TYPE == 2
SdExFat sd;
ExFile dir;
ExFile file;
#elif SD_FAT_TYPE == 3
SdFs sd;
FsFile dir;
FsFile file;
#else  // SD_FAT_TYPE
#error invalid SD_FAT_TYPE
#endif  // SD_FAT_TYPE
//------------------------------------------------------------------------------
// Store error strings in flash to save RAM.
#define error(s) sd.errorHalt(&Serial, F(s))
//------------------------------------------------------------------------------
void setup() {
  Serial.begin(9600);

  // Wait for USB Serial
  while (!Serial) {
    yield();
  }

  Serial.println("Type any character to start");
  while (!Serial.available()) {
    yield();
  }

  // Initialize the SD.
  if (!sd.begin(SD_CONFIG)) {
    sd.initErrorHalt(&Serial);
  }
  // Open root directory
  if (!dir.open("/")) {
    error("dir.open failed");
  }
  // Open next file in root.
  // Warning, openNext starts at the current position of dir so a
  // rewind may be necessary in your application.
  while (file.openNext(&dir, 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 (dir.getError()) {
    Serial.println("openNext failed");
  } else {
    Serial.println("Done!");
  }
}
//------------------------------------------------------------------------------
void loop() {}