added example for download and decompress for ota images

examples/OTA_Qspi_Flash_download_onthefly/OTA_Qspi_Flash_download_onthefly.ino

@@ -0,0 +1,137 @@
+/*
+ * This example demonstrates how to use to update the firmware of the Arduino Portenta H7 using
+ * a firmware image stored on the QSPI.
+ *
+ * Steps:
+ *   1) Create a sketch for the Portenta H7 and verify
+ *      that it both compiles and works on a board.
+ *   2) In the IDE select: Sketch -> Export compiled Binary.
+ *   3) Create an OTA update file utilising the tools 'lzss.py' and 'bin2ota.py' stored in
+ *      https://github.com/arduino-libraries/ArduinoIoTCloud/tree/master/extras/tools .
+ *      A) ./lzss.py --encode SKETCH.bin SKETCH.lzss
+ *      B) ./bin2ota.py PORTENTA_H7_M7 SKETCH.lzss SKETCH.ota
+ *   4) Upload the OTA file to a network reachable location, e.g. OTA_Usage_Portenta.ino.PORTENTA_H7_M7.ota
+ *      has been uploaded to: http://downloads.arduino.cc/ota/OTA_Usage_Portenta.ino.PORTENTA_H7_M7.ota
+ *   5) Perform an OTA update via steps outlined below.
+ */
+
+/******************************************************************************
+ * INCLUDE
+ ******************************************************************************/
+
+#include <Arduino_Portenta_OTA.h>
+
+#include <WiFi.h>
+
+#include "arduino_secrets.h" 
+
+/******************************************************************************
+ * CONSTANT
+ ******************************************************************************/
+
+/* Please enter your sensitive data in the Secret tab/arduino_secrets.h */
+static char const SSID[] = SECRET_SSID;  /* your network SSID (name) */
+static char const PASS[] = SECRET_PASS;  /* your network password (use for WPA, or use as key for WEP) */
+
+#if defined(ARDUINO_NICLA_VISION)
+static char const OTA_FILE_LOCATION[] = "https://downloads.arduino.cc/ota/OTA_Usage_Portenta.ino.NICLA_VISION.ota";
+#elif defined(ARDUINO_PORTENTA_H7_M7)
+static char const OTA_FILE_LOCATION[] = "https://downloads.arduino.cc/ota/OTA_Usage_Portenta.ino.PORTENTA_H7_M7.ota";
+#elif defined(ARDUINO_OPTA)
+static char const OTA_FILE_LOCATION[] = "https://downloads.arduino.cc/ota/OTA_Usage_Portenta.ino.OPTA.ota";
+#elif defined(ARDUINO_GIGA)
+static char const OTA_FILE_LOCATION[] = "https://downloads.arduino.cc/ota/OTA_Usage_Portenta.ino.GIGA.ota";
+#else
+#error "Board not supported"
+#endif
+
+/******************************************************************************
+ * SETUP/LOOP
+ ******************************************************************************/
+
+void setup()
+{
+  Serial.begin(115200);
+  while (!Serial) {}
+
+  if (WiFi.status() == WL_NO_SHIELD)
+  {
+    Serial.println("Communication with WiFi module failed!");
+    return;
+  }
+
+  int status = WL_IDLE_STATUS;
+  while (status != WL_CONNECTED)
+  {
+    Serial.print  ("Attempting to connect to '");
+    Serial.print  (SSID);
+    Serial.println("'");
+    status = WiFi.begin(SSID, PASS);
+    if(status != WL_CONNECTED) {
+      delay(10000);
+    }
+  }
+  Serial.print  ("You're connected to '");
+  Serial.print  (WiFi.SSID());
+  Serial.println("'");
+
+  Arduino_Portenta_OTA_QSPI ota(QSPI_FLASH_FATFS_MBR, 2);
+  Arduino_Portenta_OTA::Error ota_err = Arduino_Portenta_OTA::Error::None;
+
+  if (!ota.isOtaCapable())
+  {
+    Serial.println("Higher version bootloader required to perform OTA.");
+    Serial.println("Please update the bootloader.");
+    Serial.println("File -> Examples -> Portenta_System -> PortentaH7_updateBootloader");
+    return;
+  }
+
+  Serial.println("Initializing OTA storage");
+  if ((ota_err = ota.begin()) != Arduino_Portenta_OTA::Error::None)
+  {
+    Serial.print  ("Arduino_Portenta_OTA::begin() failed with error code ");
+    Serial.println((int)ota_err);
+    return;
+  }
+
+  uint32_t start = millis();
+  float elapsed, speed;
+
+  Serial.println("Starting download to QSPI ...");
+  int const ota_download = ota.downloadAndDecompress(OTA_FILE_LOCATION, true /* is_https */);
+  if (ota_download <= 0)
+  {
+    Serial.print  ("Arduino_Portenta_OTA_QSPI::download failed with error code ");
+    Serial.println(ota_download);
+    return;
+  }
+  Serial.print  (ota_download);
+  Serial.println(" bytes stored.");
+
+  elapsed = (millis()-start)/1000.0; // elapsed expressed in seconds
+  speed = (ota_download/elapsed)/1024;
+
+  Serial.print("download elapsed ");
+  Serial.print(elapsed);
+  Serial.print("s speed: ");
+  Serial.print(speed);
+  Serial.println("KBps");
+
+  Serial.println("Storing parameters for firmware update in bootloader accessible non-volatile memory ...");
+  if ((ota_err = ota.update()) != Arduino_Portenta_OTA::Error::None)
+  {
+    Serial.print  ("ota.update() failed with error code ");
+    Serial.println((int)ota_err);
+    return;
+  }
+
+  Serial.println("Performing a reset after which the bootloader will update the firmware.");
+  Serial.println("Hint: Portenta H7 LED will blink Red-Blue-Green.");
+  delay(1000); /* Make sure the serial message gets out before the reset. */
+  ota.reset();
+}
+
+void loop()
+{
+
+}

examples/OTA_Qspi_Flash_download_onthefly/arduino_secrets.h

@@ -0,0 +1,2 @@
+#define SECRET_SSID ""
+#define SECRET_PASS ""