clean up

add some doxygen work
finalize device disconnection & suspend
- suspend & resume & remote wake up is not supported yet

tinyusb/class/cdc_device.h

@@ -36,13 +36,6 @@
 */
 /**************************************************************************/
 
-/** \ingroup TBD
- *  \defgroup TBD
- *  \brief TBD
- *
- *  @{
- */
-
 #ifndef _TUSB_CDC_DEVICE_H_
 #define _TUSB_CDC_DEVICE_H_
 
@@ -54,6 +47,11 @@
  extern "C" {
 #endif
 
+/** \addtogroup CDC_Serial Serial
+ *  @{
+ *  \defgroup   CDC_Serial_Device Device
+ *  @{ */
+
 //--------------------------------------------------------------------+
 // APPLICATION API
 //--------------------------------------------------------------------+
@@ -91,3 +89,4 @@ void cdcd_close(uint8_t coreid);
 #endif /* _TUSB_CDC_DEVICE_H_ */
 
 /** @} */
+/** @} */