ADDING LPC176X device

implementing dcd_lpc175x_6x.c
add usbd_dcd.h
add usbd_isr with TUSB_EVENT_SETUP_RECEIVED & TUSB_EVENT_BUS_RESET event
parameterize TUSB_CFG_DEVICE_CONTROL_PACKET_SIZE (replace USB_MAX_PACKET0)

--> able to get interrupt and receive setup packet, but SET ADDRESS (expected get device descriptor).
uncomment write zero length will cause issue, no more interrupt ?

tinyusb/device/usbd_dcd.h

@@ -0,0 +1,77 @@
+/**************************************************************************/
+/*!
+    @file     usbd_dcd.h
+    @author   hathach (tinyusb.org)
+
+    @section LICENSE
+
+    Software License Agreement (BSD License)
+
+    Copyright (c) 2013, hathach (tinyusb.org)
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are met:
+    1. Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+    3. Neither the name of the copyright holders nor the
+    names of its contributors may be used to endorse or promote products
+    derived from this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
+    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+    This file is part of the tinyusb stack.
+*/
+/**************************************************************************/
+
+/** \ingroup TBD
+ *  \defgroup TBD
+ *  \brief TBD
+ *
+ *  @{
+ */
+
+#ifndef _TUSB_USBD_DCD_H_
+#define _TUSB_USBD_DCD_H_
+
+//--------------------------------------------------------------------+
+// INCLUDE
+//--------------------------------------------------------------------+
+#include "common/common.h"
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+typedef struct {
+  volatile uint8_t state;
+  uint8_t address;
+  tusb_std_request_t setup_packet;
+
+}usbd_device_info_t;
+
+extern usbd_device_info_t usbd_devices[CONTROLLER_DEVICE_NUMBER];
+//--------------------------------------------------------------------+
+// callback from DCD ISR
+//--------------------------------------------------------------------+
+void usbd_isr(uint8_t coreid, tusb_event_t event);
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif /* _TUSB_USBD_DCD_H_ */
+
+/** @} */