removed checkConnection()

Author: cristidragomir97

README.md

@@ -45,3 +45,5 @@ This library is compatible with STM32 and Renesas based Arduino boards. The avai
 * Portenta H7 + Vision Shield: SD and QSPI
 * Portenta C33 + Portenta Breakout: USB, SD, and QSPI
 * Portenta C33 + Vision Shield: SD and QSPI
+
+Note: Due to a known hardware issue on the Portenta Breakout Board, inserting a USB drive on the USB-A port of the breakout board will cause a reboot on Portenta C33 boards. You can work around this issue by connecting your USB Mass Storage device trough a USB hub. This issue only affects Portenta C33 boards, not Portenta H7 or Portenta Machine Control.

examples/AdvancedUSBInternalOperations/AdvancedUSBInternalOperations.ino

@@ -68,7 +68,6 @@ void setup() {
     Serial.println(errno);
   }
 
-
   if(internalStorage.begin(FS_FAT)){
       Serial.println("Internal storage mounted.");
   } else {

examples/PortentaH7Logger/PortentaH7Logger.ino

@@ -7,7 +7,6 @@
 // The maximum number of attempts to mount the USB drive
 constexpr auto MAX_MOUNT_ATTEMPTS = 10;
 
-volatile bool USBStorage::usbAvailable = false;
 
 USBStorage::USBStorage(){
 #if defined(ARDUINO_PORTENTA_C33)
@@ -56,34 +55,11 @@ Folder USBStorage::getRootFolder(){
     return Folder("/usb");
 }
 
-bool USBStorage::isAvailable(){
-    return usbAvailable;
-}
 
 bool USBStorage::isConnected(){
     return this -> connected;
 }
 
-void USBStorage::checkConnection(){
-    #if defined(ARDUINO_PORTENTA_H7_M7)
-        USBHost * host;
-        USBDeviceConnected * dev;
-        unsigned long currentMillis = millis();
-        boolean found = false;
-
-        if (currentMillis - previousMillis >= interval) {
-        this->previousMillis = currentMillis;
-        host = USBHost::getHostInst();
-
-        if ((dev = host->getDevice(0)) != NULL){
-            usbAvailable = true;
-            found = true;
-        } else{
-            usbAvailable = false;
-        }
-        }
-    #endif
-}
 
 bool  USBStorage::format(FileSystems fs){
     if(fs == FS_FAT){

src/USBStorage.cpp

@@ -57,17 +57,7 @@ class USBStorage : public Arduino_UnifiedStorage {
      */
     bool isConnected();
 
-    /**
-     * Checks if the USB storage is available.
-     * 
-     * @return true if available, false otherwise.
-     */
-    bool isAvailable();
 
-    /**
-     * Checks the USB storage connection status.
-     */
-    void checkConnection();
 
 
 
@@ -76,7 +66,6 @@ class USBStorage : public Arduino_UnifiedStorage {
     bool connected = false;
     unsigned long previousMillis; 
     unsigned int interval = 500;
-    static volatile bool usbAvailable;
 };
 
 #endif