better multiple interfaces support for cdc device

src/device/usbd.c

@@ -528,6 +528,8 @@ void dcd_bus_event(uint8_t rhport, usbd_bus_event_type_t bus_event)
       varclr_(&_usbd_dev);
       osal_queue_flush(_usbd_q);
       osal_semaphore_reset_isr(_usbd_ctrl_sem);
+
+      // TODO move to unplugged
       for (uint8_t i = 0; i < USBD_CLASS_DRIVER_COUNT; i++)
       {
         if ( usbd_class_drivers[i].close ) usbd_class_drivers[i].close( rhport );

src/device/usbd_pvt.h

@@ -45,6 +45,14 @@
 // for used by usbd_control_xfer_st() only, must not be used directly
 extern osal_semaphore_t _usbd_ctrl_sem;
 
+
+typedef struct
+{
+  uint8_t  itf_num;
+  uint8_t  ep_count;
+  uint8_t  ep_arr[1];
+}usbd_itf_t;
+
 //--------------------------------------------------------------------+
 // INTERNAL API for stack management
 //--------------------------------------------------------------------+
@@ -63,7 +71,7 @@ tusb_error_t usbd_open_edpt_pair(uint8_t rhport, tusb_desc_endpoint_t const* p_d
   do {\
     if (_len) { \
       tusb_error_t err;\
-      dcd_control_xfer(_rhport, _dir, _buffer, _len);\
+      dcd_control_xfer(_rhport, _dir, (uint8_t*) _buffer, _len);\
       osal_semaphore_wait( _usbd_ctrl_sem, OSAL_TIMEOUT_CONTROL_XFER, &err );\
       STASK_ASSERT_ERR( err );\
     }\