Fix date management of external SPI Flash

https://www.mischianti.org/forums/topic/external-flash-spi-storage-on-w25q64-with-esp32/#post-23893

Author: xreef

README.md

@@ -12,7 +12,7 @@
  - Wio Terminal (SdFat 2, Seed SD, and native FAT)
 
 #### Changelog
-- 2022-01-13 2.1.5 Fix SPIFM external SPI Flash date management
+- 2022-01-13 2.1.5 Fix SPIFM external SPI Flash date management (add SPIFM esp32 example)
 - 2022-09-21 2.1.4 Add support for Raspberry Pi Pico W and rp2040 boards, Fix SD card config
 - 2022-09-20 2.1.3 Soft AP IP management, more disconnect event and SD_MCC
 - 2022-05-21 2.1.2 Fix SD path (#19)

examples/ESP32_SPIFM_WiFi/ESP32_SPIFM_WiFi.ino

@@ -0,0 +1,136 @@
+#include <Arduino.h>
+#include "SdFat.h"
+#include "Adafruit_SPIFlash.h"
+#include <WiFi.h>
+#include <SimpleFTPServer.h>
+
+Adafruit_FlashTransport_SPI flashTransport(SS, SPI); // Set CS and SPI interface
+Adafruit_SPIFlash flash(&flashTransport);
+
+// file system object from SdFat
+FatFileSystem fatfs;
+
+const char* ssid = "<YOUR_SSID>";
+const char* password = "<YOUR_PASSWD>";
+
+
+FtpServer ftpSrv;   //set #define FTP_DEBUG in ESP8266FtpServer.h to see ftp verbose on serial
+
+void _callback(FtpOperation ftpOperation, unsigned int freeSpace, unsigned int totalSpace){
+  switch (ftpOperation) {
+    case FTP_CONNECT:
+      Serial.println(F("FTP: Connected!"));
+      break;
+    case FTP_DISCONNECT:
+      Serial.println(F("FTP: Disconnected!"));
+      break;
+    case FTP_FREE_SPACE_CHANGE:
+    	Serial.print(F("FTP: Free space change, free "));
+    	Serial.print(freeSpace);
+    	Serial.print(F(" of "));
+    	Serial.println(totalSpace);
+      break;
+    default:
+      break;
+  }
+};
+void _transferCallback(FtpTransferOperation ftpOperation, const char* name, unsigned int transferredSize){
+  switch (ftpOperation) {
+    case FTP_UPLOAD_START:
+      Serial.println(F("FTP: Upload start!"));
+      break;
+    case FTP_UPLOAD:
+      Serial.print(F("FTP: Upload of file "));
+      Serial.print(name);
+      Serial.print(F(" "));
+      Serial.print(transferredSize);
+      Serial.println(F("bytes"));
+      break;
+    case FTP_TRANSFER_STOP:
+      Serial.println(F("FTP: Finish transfer!"));
+      break;
+    case FTP_TRANSFER_ERROR:
+      Serial.println(F("FTP: Transfer error!"));
+      break;
+    default:
+      break;
+  }
+
+  /* FTP_UPLOAD_START = 0,
+   * FTP_UPLOAD = 1,
+   *
+   * FTP_DOWNLOAD_START = 2,
+   * FTP_DOWNLOAD = 3,
+   *
+   * FTP_TRANSFER_STOP = 4,
+   * FTP_DOWNLOAD_STOP = 4,
+   * FTP_UPLOAD_STOP = 4,
+   *
+   * FTP_TRANSFER_ERROR = 5,
+   * FTP_DOWNLOAD_ERROR = 5,
+   * FTP_UPLOAD_ERROR = 5
+   */
+};
+
+void setup()
+{
+	  // Initialize serial port and wait for it to open before continuing.
+	  Serial.begin(115200);
+	  while (!Serial) {
+	    delay(100);
+	  }
+	  Serial.println("FTP with external SPIFlash");
+
+	  WiFi.begin(ssid, password);
+	  Serial.println("");
+
+	  // Wait for connection
+	  while (WiFi.status() != WL_CONNECTED) {
+	    delay(500);
+	    Serial.print(".");
+	  }
+	  Serial.println("");
+	  Serial.print("Connected to ");
+	  Serial.println(ssid);
+	  Serial.print("IP address: ");
+	  Serial.println(WiFi.localIP());
+	  Serial.print("SN address: ");
+	  Serial.println(WiFi.subnetMask());
+
+	  if (flash.begin()) {
+		  Serial.println(F("Device finded and supported!"));
+	  } else {
+		  Serial.println(F("Problem to discover and configure device, check wiring also!"));
+		  while(1) yield();
+	  }
+	  // Set 4Mhz SPI speed
+	  flashTransport.setClockSpeed(4000000, 4000000); // added to prevent speed problem
+
+	  Serial.print("JEDEC ID: "); Serial.println(flash.getJEDECID(), HEX);
+	  Serial.print("Flash size: "); Serial.println(flash.size());
+	  Serial.flush();
+
+	  // First call begin to mount the filesystem.  Check that it returns true
+	  // to make sure the filesystem was mounted.
+	  if (!fatfs.begin(&flash)) {
+	    Serial.println("Error, failed to mount newly formatted filesystem!");
+	    Serial.println("Was the flash chip formatted with the SdFat_format example?");
+	    while(1) yield();
+	  }
+	  Serial.println("Mounted filesystem!");
+	  Serial.println();
+
+      ftpSrv.setCallback(_callback);
+      ftpSrv.setTransferCallback(_transferCallback);
+
+      Serial.println("Starting FTP Server!");
+      ftpSrv.begin("user","password");    //username, password for ftp.   (default 21, 50009 for PASV)
+//      ftpSrv.beginAnonymous();
+
+}
+
+// The loop function is called in an endless loop
+void loop()
+{
+	  ftpSrv.handleFTP();        //make sure in loop you call handleFTP()!!
+}