First Commit

libraries/SdFat/examples/DirectoryFunctions/DirectoryFunctions.ino

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+/*
+ * Example use of chdir(), ls(), mkdir(), and  rmdir().
+ */
+#include "SdFat.h"
+#include "sdios.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 3
+/*
+  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 file;
+File root;
+#elif SD_FAT_TYPE == 1
+SdFat32 sd;
+File32 file;
+File32 root;
+#elif SD_FAT_TYPE == 2
+SdExFat sd;
+ExFile file;
+ExFile root;
+#elif SD_FAT_TYPE == 3
+SdFs sd;
+FsFile file;
+FsFile root;
+#endif  // SD_FAT_TYPE
+
+// Create a Serial output stream.
+ArduinoOutStream cout(Serial);
+//------------------------------------------------------------------------------
+// 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();
+  }
+  delay(1000);
+  cout << F("Type any character to start\n");
+  while (!Serial.available()) {
+    yield();
+  }
+
+  // Initialize the SD card.
+  if (!sd.begin(SD_CONFIG)) {
+    sd.initErrorHalt(&Serial);
+  }
+  if (sd.exists("Folder1") || sd.exists("Folder1/file1.txt") ||
+      sd.exists("Folder1/File2.txt")) {
+    error("Please remove existing Folder1, file1.txt, and File2.txt");
+  }
+
+  int rootFileCount = 0;
+  if (!root.open("/")) {
+    error("open root");
+  }
+  while (file.openNext(&root, O_RDONLY)) {
+    if (!file.isHidden()) {
+      rootFileCount++;
+    }
+    file.close();
+    if (rootFileCount > 10) {
+      error("Too many files in root. Please use an empty SD.");
+    }
+  }
+  if (rootFileCount) {
+    cout << F("\nPlease use an empty SD for best results.\n\n");
+    delay(1000);
+  }
+  // Create a new folder.
+  if (!sd.mkdir("Folder1")) {
+    error("Create Folder1 failed");
+  }
+  cout << F("Created Folder1\n");
+
+  // Create a file in Folder1 using a path.
+  if (!file.open("Folder1/file1.txt", O_WRONLY | O_CREAT)) {
+    error("create Folder1/file1.txt failed");
+  }
+  file.close();
+  cout << F("Created Folder1/file1.txt\n");
+
+  // Change volume working directory to Folder1.
+  if (!sd.chdir("Folder1")) {
+    error("chdir failed for Folder1.\n");
+  }
+  cout << F("chdir to Folder1\n");
+
+  // Create File2.txt in current directory.
+  if (!file.open("File2.txt", O_WRONLY | O_CREAT)) {
+    error("create File2.txt failed");
+  }
+  file.close();
+  cout << F("Created File2.txt in current directory\n");
+
+  cout << F("\nList of files on the SD.\n");
+  sd.ls("/", LS_R);
+
+  // Remove files from current directory.
+  if (!sd.remove("file1.txt") || !sd.remove("File2.txt")) {
+    error("remove failed");
+  }
+  cout << F("\nfile1.txt and File2.txt removed.\n");
+
+  // Change current directory to root.
+  if (!sd.chdir()) {
+    error("chdir to root failed.\n");
+  }
+
+  cout << F("\nList of files on the SD.\n");
+  sd.ls(LS_R);
+
+  // Remove Folder1.
+  if (!sd.rmdir("Folder1")) {
+    error("rmdir for Folder1 failed\n");
+  }
+  cout << F("\nFolder1 removed.\n");
+  cout << F("\nList of files on the SD.\n");
+  sd.ls(LS_R);
+  cout << F("Done!\n");
+}
+//------------------------------------------------------------------------------
+// Nothing happens in loop.
+void loop() {}