Differences

This shows you the differences between two versions of the page.

--- littlefs [2024/11/12 10:05] – jwan
+++ littlefs [2025/10/10 10:15] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+LittleFS data are stored inside the Flash memory (not EEPROM) and has 1MB size.
+To format:
+<code>
+#include <LittleFS.h>
+void setup() {
+  Serial.begin(115200);
+  if (!LittleFS.begin()) {
+    Serial.println("LittleFS Mount Failed");
+    return;
+  }
+  Serial.println("Formatting LittleFS...");
+  if (LittleFS.format()) {
+    Serial.println("LittleFS formatted successfully");
+  } else {
+    Serial.println("Failed to format LittleFS");
+  }
+}
+void loop() {
+  // Your code here
+}
+</code>
 Show basic info:
@@ Line 9: / Line 36: @@
 void setup() {
   Serial.begin(115200);
+  Serial.println();
+  Serial.println();
+  Serial.println();
+  uint32_t chipId = ESP.getChipId();
+  Serial.print("Chip ID: ");
+  Serial.println(chipId);
+  uint32_t flashSize = ESP.getFlashChipSize();
+  Serial.print("Flash Chip Size: ");
+  Serial.print(flashSize / 1024 / 1024);
+  Serial.println(" MB");
+  Serial.println();
   LittleFS.begin();
@@ Line 35: / Line 78: @@
   Serial.printf("Listing directory: %s\n", dirname);
-  File root = fs.open(dirname);
+  Dir dir = fs.openDir(dirname);
-  if (!root) {
+  while (dir.next()) {
-    Serial.println("Failed to open directory");
+    if (dir.isDirectory()) {
-    return;
-  }
-  if (!root.isDirectory()) {
-    Serial.println("Not a directory");
-    return;
-  }
-  File file = root.openNextFile();
-  while (file) {
-    if (file.isDirectory()) {
       Serial.print("  DIR : ");
-      Serial.println(file.name());
+      Serial.println(dir.fileName());
       if (levels) {
-        listDir(fs, file.name(), levels - 1);
+        listDir(fs, dir.fileName().c_str(), levels - 1);
       }
     } else {
       Serial.print("  FILE: ");
-      Serial.print(file.name());
+      Serial.print(dir.fileName());
       Serial.print("  SIZE: ");
-      Serial.println(file.size());
+      Serial.println(dir.fileSize());
     }
-    file = root.openNextFile();
   }
 }
@@ Line 65: / Line 97: @@
 void setup() {
   Serial.begin(115200);
-  LittleFS.begin();
+  if (!LittleFS.begin()) {
+    Serial.println("LittleFS Mount Failed");
+    return;
+  }
   listDir(LittleFS, "/", 0);
 }
@@ Line 72: / Line 107: @@
   // Your code here
 }
 </code>