USBD_CDC: Allow setting the CDC string descriptor

src/arduino/Adafruit_USBD_CDC.cpp

@@ -87,8 +87,8 @@ uint16_t Adafruit_USBD_CDC::getInterfaceDescriptor(uint8_t itfnum_deprecated,
   return len;
 }
 
-// Baud and config is ignore in CDC
-void Adafruit_USBD_CDC::begin(uint32_t baud) {
+// Configure with a custom descriptor string
+void Adafruit_USBD_CDC::begin(uint32_t baud, const char *descriptor) {
   (void)baud;
 
   // already called begin()
@@ -102,10 +102,14 @@ void Adafruit_USBD_CDC::begin(uint32_t baud) {
   }
 
   _instance = _instance_count++;
-  this->setStringDescriptor("TinyUSB Serial");
+  this->setStringDescriptor(descriptor);
   TinyUSBDevice.addInterface(*this);
 }
 
+void Adafruit_USBD_CDC::begin(uint32_t baud) {
+  Adafruit_USBD_CDC::begin(baud, "TinyUSB Serial");
+}
+
 void Adafruit_USBD_CDC::begin(uint32_t baud, uint8_t config) {
   (void)config;
   this->begin(baud);

src/arduino/Adafruit_USBD_CDC.h

@@ -51,6 +51,7 @@ public:
     (void)pin_tx;
   }
   void begin(uint32_t baud);
+  void begin(uint32_t baud, const char *descriptor);
   void begin(uint32_t baud, uint8_t config);
   void end(void);
 

src/arduino/cdc/Adafruit_USBH_CDC.cpp

@@ -60,6 +60,11 @@ void Adafruit_USBH_CDC::begin(unsigned long baudrate) {
   }
 }
 
+void Adafruit_USBH_CDC::begin(uint32_t baudrate, const char *descriptor) {
+  (void)descriptor;
+  begin(baudrate);
+}
+
 void Adafruit_USBH_CDC::begin(unsigned long baudrate, uint16_t config) {
   (void)config; // TODO support line coding later
   begin(baudrate);

src/arduino/cdc/Adafruit_USBH_CDC.h

@@ -36,6 +36,7 @@ public:
   uint8_t getInterfaceIndex(void) { return _idx; }
 
   void begin(unsigned long baudrate);
+  void begin(uint32_t baud, const char *descriptor);
   void begin(unsigned long baudrate, uint16_t config);
 
   bool mount(uint8_t idx);