diff --git a/boards/board.h b/boards/board.h
index 1ee5f4cd..f4f2503c 100644
--- a/boards/board.h
+++ b/boards/board.h
@@ -58,6 +58,7 @@
 //--------------------------------------------------------------------+
 /** \defgroup group_supported_board Supported Boards
  *  @{ */
+#define BOARD_LPCXPRESSO11U14       1114 ///< LPCXpresso 11u14, some APIs requires the base board
 #define BOARD_RF1GHZNODE            1100 ///< LPC11U37 from microbuilder http://www.microbuilder.eu/Blog/13-03-14/LPC1xxx_1GHZ_Wireless_Board_Preview.aspx
 #define BOARD_LPCXPRESSO1347        1300 ///< LPCXpresso 1347, some APIs requires the base board
 #define BOARD_LPCXPRESSO1769        1700 ///< LPCXpresso 1769, some APIs requires the base board
@@ -88,20 +89,22 @@
 //--------------------------------------------------------------------+
 // BOARD INCLUDE
 //--------------------------------------------------------------------+
-#if BOARD == BOARD_NGX4330
-  #include "ngx/board_ngx4330.h"
-#elif BOARD == BOARD_LPCXPRESSO1347
-  #include "lpcxpresso/board_lpcxpresso1347.h"
+#if BOARD == BOARD_LPCXPRESSO11U14
+  #include "lpcxpresso/board_lpcxpresso11u14.h"
 #elif BOARD == BOARD_RF1GHZNODE
   #include "microbuilder/board_rf1ghznode.h"
+#elif BOARD == BOARD_LPCXPRESSO1347
+  #include "lpcxpresso/board_lpcxpresso1347.h"
+#elif BOARD == BOARD_LPCXPRESSO1769
+  #include "lpcxpresso/board_lpcxpresso1769.h"
+#elif BOARD == BOARD_NGX4330
+  #include "ngx/board_ngx4330.h"
 #elif BOARD == BOARD_EA4357
   #include "embedded_artists/ea4357/board_ea4357.h"
 #elif BOARD == BOARD_MCB4300
   #include "keil/board_mcb4300.h"
 #elif BOARD == BOARD_HITEX4350
   #include "hitex/board_hitex4350.h"
-#elif BOARD == BOARD_LPCXPRESSO1769
-  #include "lpcxpresso/board_lpcxpresso1769.h"
 #elif BOARD == BOARD_LPC4357USB
   #include "microbuilder/board_lpc4357usb.h"
 #elif BOARD == BOARD_LPCLINK2
diff --git a/boards/lpcxpresso/board_lpcxpresso11u14.c b/boards/lpcxpresso/board_lpcxpresso11u14.c
new file mode 100644
index 00000000..eb8c39ed
--- /dev/null
+++ b/boards/lpcxpresso/board_lpcxpresso11u14.c
@@ -0,0 +1,131 @@
+/**************************************************************************/
+/*!
+    @file     board_lpcxpresso11u14.c
+    @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.
+*/
+/**************************************************************************/
+
+#include "../board.h"
+
+#if BOARD == BOARD_LPCXPRESSO11U14
+
+#define LED_PORT                  (0)
+#define LED_PIN                   (7)
+#define LED_ON                    (1)
+
+const static struct {
+  uint8_t port;
+  uint8_t pin;
+} buttons[] =
+{
+    {1, 22 }, // Joystick up
+    {1, 20 }, // Joystick down
+    {1, 23 }, // Joystick left
+    {1, 21 }, // Joystick right
+    {1, 19 }, // Joystick press
+    {0, 1  }, // SW3
+//    {1, 4  }, // SW4 (require to remove J28)
+};
+
+
+enum {
+  BOARD_BUTTON_COUNT = sizeof(buttons) / sizeof(buttons[0])
+};
+
+void board_init(void)
+{
+  SystemInit();
+
+#if TUSB_CFG_OS == TUSB_OS_NONE // TODO may move to main.c
+  SysTick_Config(SystemCoreClock / TUSB_CFG_TICKS_HZ); // 1 msec tick timer
+#endif
+
+  GPIOInit();
+
+  //------------- LED -------------//
+  GPIOSetDir(LED_PORT, LED_PIN, 1);
+
+  //------------- BUTTON -------------//
+  for(uint8_t i=0; i<BOARD_BUTTON_COUNT; i++) GPIOSetDir(buttons[i].port, buttons[i].pin, 0);
+
+  //------------- UART -------------//
+  UARTInit(CFG_UART_BAUDRATE);
+}
+
+//--------------------------------------------------------------------+
+// LEDS
+//--------------------------------------------------------------------+
+void board_leds(uint32_t on_mask, uint32_t off_mask)
+{
+  if (on_mask & BIT_(0))
+  {
+    GPIOSetBitValue(LED_PORT, LED_PIN, LED_ON);
+  }else if (off_mask & BIT_(0))
+  {
+    GPIOSetBitValue(LED_PORT, LED_PIN, 1 - LED_ON);
+  }
+}
+
+//--------------------------------------------------------------------+
+// Buttons
+//--------------------------------------------------------------------+
+static bool button_read(uint8_t id)
+{
+  return !GPIOGetPinValue(buttons[id].port, buttons[id].pin); // button is active low
+}
+
+uint32_t board_buttons(void)
+{
+  uint32_t result = 0;
+
+  for(uint8_t i=0; i<BOARD_BUTTON_COUNT; i++) result |= (button_read(i) ? BIT_(i) : 0);
+
+  return result;
+}
+
+//--------------------------------------------------------------------+
+// UART
+//--------------------------------------------------------------------+
+void board_uart_putchar(uint8_t c)
+{
+  UARTSend(&c, 1);
+}
+
+uint8_t  board_uart_getchar(void)
+{
+//  *buffer = get_key(); TODO cannot find available code for uart getchar
+  return 0;
+}
+
+#endif
diff --git a/boards/lpcxpresso/board_lpcxpresso11u14.h b/boards/lpcxpresso/board_lpcxpresso11u14.h
new file mode 100644
index 00000000..cd4314d3
--- /dev/null
+++ b/boards/lpcxpresso/board_lpcxpresso11u14.h
@@ -0,0 +1,57 @@
+/**************************************************************************/
+/*!
+    @file     board_lpcxpresso11u14.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.
+*/
+/**************************************************************************/
+
+#ifndef _TUSB_BOARD_RF1GHZNODE_H_
+#define _TUSB_BOARD_RF1GHZNODE_H_
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+#include "LPC11Uxx.h"
+#include "lpc11uxx_gpio.h"
+#include "lpc11uxx_uart.h"
+
+//#define CFG_PRINTF_TARGET             PRINTF_TARGET_SEMIHOST
+#define CFG_PRINTF_TARGET             PRINTF_TARGET_UART
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif /* _TUSB_BOARD_RF1GHZNODE_H_ */
diff --git a/boards/lpcxpresso/board_lpcxpresso1347.c b/boards/lpcxpresso/board_lpcxpresso1347.c
index 0a45830c..74455a23 100644
--- a/boards/lpcxpresso/board_lpcxpresso1347.c
+++ b/boards/lpcxpresso/board_lpcxpresso1347.c
@@ -76,7 +76,6 @@ void board_init(void)
 
   //------------- LED -------------//
   GPIOSetDir(LED_PORT, LED_PIN, 1);
-  LPC_GPIO->CLR[LED_PORT] = (1 << LED_PIN);
 
   //------------- BUTTON -------------//
   for(uint8_t i=0; i<BOARD_BUTTON_COUNT; i++) GPIOSetDir(buttons[i].port, BIT_(buttons[i].pin), 0);
diff --git a/boards/microbuilder/board_rf1ghznode.c b/boards/microbuilder/board_rf1ghznode.c
index 9d902282..882ab685 100644
--- a/boards/microbuilder/board_rf1ghznode.c
+++ b/boards/microbuilder/board_rf1ghznode.c
@@ -66,7 +66,6 @@ void board_init(void)
 
   //------------- LED -------------//
   GPIOSetDir(LED_PORT, LED_PIN, 1);
-  board_leds(0x01, 0); // turn off the led first
 
   //------------- BUTTON -------------//
   for(uint8_t i=0; i<BOARD_BUTTON_COUNT; i++) GPIOSetDir(buttons[i].port, buttons[i].pin, 0);
diff --git a/demos/device/src/app_os_prio.h b/demos/device/src/app_os_prio.h
new file mode 100644
index 00000000..52d42efe
--- /dev/null
+++ b/demos/device/src/app_os_prio.h
@@ -0,0 +1,73 @@
+/**************************************************************************/
+/*!
+    @file     app_os_prio.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.
+*/
+/**************************************************************************/
+
+#ifndef _TUSB_APP_OS_PRIO_H_
+#define _TUSB_APP_OS_PRIO_H_
+
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+#include "tusb.h"
+
+#if TUSB_CFG_OS == TUSB_OS_NONE
+  #define LOWER_PRIO(x)   0   // does not matter
+#elif TUSB_CFG_OS == TUSB_OS_FREERTOS
+  #define LOWER_PRIO(x)   ((x)-1) // freeRTOS lower number --> lower priority
+#elif TUSB_CFG_OS == TUSB_OS_CMSIS_RTX
+  #define LOWER_PRIO(x)   ((x)-1) // CMSIS-RTOS lower number --> lower priority
+#else
+  #error Priority is not configured for this RTOS
+#endif
+
+enum {
+  STANDARD_APP_TASK_PRIO     = LOWER_PRIO(TUSB_CFG_OS_TASK_PRIO),  // Application Task is lower than usb system task
+  LED_BLINKING_APP_TASK_PRIO = LOWER_PRIO(STANDARD_APP_TASK_PRIO), // Blinking task is lower than normal task
+
+  KEYBOARD_APP_TASK_PRIO     = STANDARD_APP_TASK_PRIO,
+  MOUSE_APP_TASK_PRIO        = STANDARD_APP_TASK_PRIO,
+  CDC_SERIAL_APP_TASK_PRIO   = STANDARD_APP_TASK_PRIO,
+  MSC_APP_TASK_PRIO          = STANDARD_APP_TASK_PRIO
+};
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif /* _TUSB_APP_OS_PRIO_H_ */