fix examples

Author: me-no-dev

libraries/USB/examples/CompositeDevice/CompositeDevice.ino

@@ -18,6 +18,10 @@ void loop(){}
 FirmwareMSC MSC_Update;
 #endif
 
+#if !ARDUINO_USB_CDC_ON_BOOT
+USBCDC USBSerial;
+#endif
+
 USBHID HID;
 USBHIDKeyboard Keyboard;
 USBHIDMouse Mouse;

libraries/USB/examples/FirmwareMSC/FirmwareMSC.ino

@@ -65,7 +65,6 @@ void setup() {
   USB.onEvent(usbEventCallback);
   MSC_Update.onEvent(usbEventCallback);
   MSC_Update.begin();
-  USBSerial.begin();
   USB.begin();
 }
 

libraries/USB/examples/USBMSC/USBMSC.ino

@@ -182,7 +182,6 @@ void setup() {
   MSC.onWrite(onWrite);
   MSC.mediaPresent(true);
   MSC.begin(DISK_SECTOR_COUNT, DISK_SECTOR_SIZE);
-  USBSerial.begin();
   USB.begin();
 }
 

libraries/USB/examples/USBSerial/USBSerial.ino

@@ -7,6 +7,10 @@ void loop(){}
 #else
 #include "USB.h"
 
+#if !ARDUINO_USB_CDC_ON_BOOT
+USBCDC USBSerial;
+#endif
+
 static void usbEventCallback(void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data){
   if(event_base == ARDUINO_USB_EVENTS){
     arduino_usb_event_data_t * data = (arduino_usb_event_data_t*)event_data;