update hid with tud_hid_descriptor_report_cb()

Author: hathach

src/Adafruit_USBD_HID.cpp

@@ -103,9 +103,7 @@ bool Adafruit_USBD_HID::begin(void)
 {
   if ( !USBDevice.addInterface(*this) ) return false;
 
-  tud_desc_set.hid_report = _desc_report;
   _hid_dev = this;
-
   return true;
 }
 
@@ -123,6 +121,13 @@ bool Adafruit_USBD_HID::sendReport(uint8_t report_id, void const* report, uint8_
 extern "C"
 {
 
+uint8_t const * tud_hid_descriptor_report_cb(void)
+{
+  if (!_hid_dev) return NULL;
+
+  return _hid_dev->_desc_report;
+}
+
 // Invoked when received GET_REPORT control request
 // Application must fill buffer report's content and return its length.
 // Return zero will cause the stack to STALL request

src/Adafruit_USBD_HID.h

@@ -75,6 +75,7 @@ class Adafruit_USBD_HID : Adafruit_USBD_Interface
 
     friend uint16_t tud_hid_get_report_cb(uint8_t report_id, hid_report_type_t report_type, uint8_t* buffer, uint16_t reqlen);
     friend void tud_hid_set_report_cb(uint8_t report_id, hid_report_type_t report_type, uint8_t const* buffer, uint16_t bufsize);
+    friend uint8_t const * tud_hid_descriptor_report_cb(void);
 };
 
 #endif /* ADAFRUIT_USBD_HID_H_ */