diff --git a/docs/boards.md b/docs/boards.md
index 9b218fa22..5da421bc3 100644
--- a/docs/boards.md
+++ b/docs/boards.md
@@ -11,6 +11,7 @@ This code base already had supported for a handful of following boards
 
 ### Nordic nRF5x
 
+- [Adafruit Feather nRF52840 Express](https://www.adafruit.com/product/4062)
 - [nRF52840-DK (aka pca10056)](https://www.nordicsemi.com/Software-and-Tools/Development-Kits/nRF52840-DK)
 
 ### NXP LPC
diff --git a/examples/device/hid_generic_inout/hid_test.py b/examples/device/hid_generic_inout/hid_test.py
new file mode 100644
index 000000000..b6799687d
--- /dev/null
+++ b/examples/device/hid_generic_inout/hid_test.py
@@ -0,0 +1,15 @@
+# Install python3 HID package https://pypi.org/project/hid/
+import hid
+
+USB_VID = 0xcafe
+
+for dict in hid.enumerate(0xcafe):
+    print(dict)
+    dev = hid.Device(dict['vendor_id'], dict['product_id'])
+    if dev:
+        while True:
+            # Get input from console and encode to UTF8 for array of chars.
+            str_out = input("Send text to HID Device : ").encode('utf-8')
+            dev.write(str_out)
+            str_in = dev.read(64)
+            print("Received from HID Device:", str_in, '\n')
diff --git a/examples/device/hid_generic_inout/src/main.c b/examples/device/hid_generic_inout/src/main.c
index 04188b038..650df1ce2 100644
--- a/examples/device/hid_generic_inout/src/main.c
+++ b/examples/device/hid_generic_inout/src/main.c
@@ -30,6 +30,15 @@
 #include "bsp/board.h"
 #include "tusb.h"
 
+/* This example demonstrate HID Generic raw Input & Output.
+ * It will receive data from Host (In endpoint) and echo back (Out endpoint).
+ * HID Report descriptor use vendor for usage page (using template TUD_HID_REPORT_DESC_GENERIC_INOUT)
+ *
+ * Run 'python3 hid_test.py' on your PC to send and receive data to this device.
+ * Python and `hid` package is required, for installation please follow
+ * https://pypi.org/project/hid/
+ */
+
 //--------------------------------------------------------------------+
 // MACRO CONSTANT TYPEDEF PROTYPES
 //--------------------------------------------------------------------+
diff --git a/hw/bsp/feather_nrf52840_express/board.mk b/hw/bsp/feather_nrf52840_express/board.mk
new file mode 100644
index 000000000..317a4969f
--- /dev/null
+++ b/hw/bsp/feather_nrf52840_express/board.mk
@@ -0,0 +1,54 @@
+CFLAGS += \
+	-mthumb \
+	-mabi=aapcs \
+	-mcpu=cortex-m4 \
+	-mfloat-abi=hard \
+	-mfpu=fpv4-sp-d16 \
+	-DCFG_TUSB_MCU=OPT_MCU_NRF5X \
+	-DNRF52840_XXAA \
+  -DCONFIG_GPIO_AS_PINRESET
+
+# nrfx issue undef _ARMCC_VERSION usage https://github.com/NordicSemiconductor/nrfx/issues/49
+CFLAGS += -Wno-error=undef 
+
+# All source paths should be relative to the top level.
+LD_FILE = hw/mcu/nordic/nrfx/mdk/nrf52840_xxaa.ld
+
+LDFLAGS += -L$(TOP)/hw/mcu/nordic/nrfx/mdk
+
+SRC_C += \
+	hw/mcu/nordic/nrfx/drivers/src/nrfx_power.c \
+	hw/mcu/nordic/nrfx/mdk/system_nrf52840.c \
+
+# TODO remove later
+SRC_C += src/portable/$(VENDOR)/$(CHIP_FAMILY)/hal_$(CHIP_FAMILY).c
+
+INC += \
+	$(TOP)/hw/cmsis/Include \
+	$(TOP)/hw/mcu/nordic \
+	$(TOP)/hw/mcu/nordic/nrfx \
+	$(TOP)/hw/mcu/nordic/nrfx/mdk \
+	$(TOP)/hw/mcu/nordic/nrfx/hal \
+	$(TOP)/hw/mcu/nordic/nrfx/drivers/include \
+	$(TOP)/hw/mcu/nordic/nrfx/drivers/src \
+
+SRC_S += hw/mcu/nordic/nrfx/mdk/gcc_startup_nrf52840.S
+
+ASFLAGS += -D__HEAP_SIZE=0
+ASFLAGS += -DSWI_DISABLE0
+ASFLAGS += -DFLOAT_ABI_HARD
+ASFLAGS += -DNRF52840_XXAA
+
+# For TinyUSB port source
+VENDOR = nordic
+CHIP_FAMILY = nrf5x
+
+# For freeRTOS port source
+FREERTOS_PORT = ARM_CM4F
+
+# For flash-jlink target
+JLINK_DEVICE = nRF52840_xxAA
+JLINK_IF = swd
+
+# flash using jlink
+flash: flash-jlink
diff --git a/hw/bsp/feather_nrf52840_express/board_feather_nrf52840_express.c b/hw/bsp/feather_nrf52840_express/board_feather_nrf52840_express.c
new file mode 100644
index 000000000..aed869afe
--- /dev/null
+++ b/hw/bsp/feather_nrf52840_express/board_feather_nrf52840_express.c
@@ -0,0 +1,197 @@
+/* 
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018, hathach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#include "bsp/board.h"
+
+#include "nrfx.h"
+#include "nrfx/hal/nrf_gpio.h"
+#include "nrfx/drivers/include/nrfx_power.h"
+#include "nrfx/drivers/include/nrfx_qspi.h"
+
+#ifdef SOFTDEVICE_PRESENT
+#include "nrf_sdm.h"
+#include "nrf_soc.h"
+#endif
+
+/*------------------------------------------------------------------*/
+/* MACRO TYPEDEF CONSTANT ENUM
+ *------------------------------------------------------------------*/
+#define _PINNUM(port, pin)    ((port)*32 + (pin))
+
+#define LED_PIN         _PINNUM(1, 15)
+#define LED_STATE_ON    1
+
+#define BUTTON_PIN      _PINNUM(1, 02)
+
+/*------------------------------------------------------------------*/
+/* TUSB HAL MILLISECOND
+ *------------------------------------------------------------------*/
+#if CFG_TUSB_OS == OPT_OS_NONE
+volatile uint32_t system_ticks = 0;
+
+void SysTick_Handler (void)
+{
+  system_ticks++;
+}
+
+uint32_t board_millis(void)
+{
+  return system_ticks;
+}
+
+#endif
+
+/*------------------------------------------------------------------*/
+/* BOARD API
+ *------------------------------------------------------------------*/
+
+// tinyusb function that handles power event (detected, ready, removed)
+// We must call it within SD's SOC event handler, or set it as power event handler if SD is not enabled.
+extern void tusb_hal_nrf_power_event(uint32_t event);
+
+void board_init(void)
+{
+  // Config clock source: XTAL or RC in sdk_config.h
+  NRF_CLOCK->LFCLKSRC = (uint32_t)((CLOCK_LFCLKSRC_SRC_Xtal << CLOCK_LFCLKSRC_SRC_Pos) & CLOCK_LFCLKSRC_SRC_Msk);
+  NRF_CLOCK->TASKS_LFCLKSTART = 1UL;
+
+  // LED
+  nrf_gpio_cfg_output(LED_PIN);
+  board_led_write(false);
+
+  // Button
+  nrf_gpio_cfg_input(BUTTON_PIN, NRF_GPIO_PIN_PULLUP);
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+  // 1ms tick timer
+  SysTick_Config(SystemCoreClock/1000);
+#endif
+
+  // Priorities 0, 1, 4 (nRF52) are reserved for SoftDevice
+  // 2 is highest for application
+  NVIC_SetPriority(USBD_IRQn, 2);
+
+  // USB power may already be ready at this time -> no event generated
+  // We need to invoke the handler based on the status initially
+  uint32_t usb_reg;
+
+#ifdef SOFTDEVICE_PRESENT
+  uint8_t sd_en = false;
+  sd_softdevice_is_enabled(&sd_en);
+
+  if ( sd_en ) {
+    sd_power_usbdetected_enable(true);
+    sd_power_usbpwrrdy_enable(true);
+    sd_power_usbremoved_enable(true);
+
+    sd_power_usbregstatus_get(&usb_reg);
+  }else
+#endif
+  {
+    // Power module init
+    const nrfx_power_config_t pwr_cfg = { 0 };
+    nrfx_power_init(&pwr_cfg);
+
+    // Register tusb function as USB power handler
+    const nrfx_power_usbevt_config_t config = { .handler = (nrfx_power_usb_event_handler_t) tusb_hal_nrf_power_event };
+    nrfx_power_usbevt_init(&config);
+
+    nrfx_power_usbevt_enable();
+
+    usb_reg = NRF_POWER->USBREGSTATUS;
+  }
+
+  if ( usb_reg & POWER_USBREGSTATUS_VBUSDETECT_Msk ) tusb_hal_nrf_power_event(NRFX_POWER_USB_EVT_DETECTED);
+  if ( usb_reg & POWER_USBREGSTATUS_OUTPUTRDY_Msk  ) tusb_hal_nrf_power_event(NRFX_POWER_USB_EVT_READY);
+}
+
+void board_led_write(bool state)
+{
+  nrf_gpio_pin_write(LED_PIN, state ? LED_STATE_ON : (1-LED_STATE_ON));
+}
+
+uint32_t board_button_read(void)
+{
+  // button is active LOW
+  return (nrf_gpio_pin_read(BUTTON_PIN) ? 0 : 1);
+}
+
+int board_uart_read(uint8_t* buf, int len)
+{
+  (void) buf;
+  (void) len;
+  return 0;
+}
+
+int board_uart_write(void const * buf, int len)
+{
+  (void) buf;
+  (void) len;
+  return 0;
+}
+
+#ifdef SOFTDEVICE_PRESENT
+// process SOC event from SD
+uint32_t proc_soc(void)
+{
+  uint32_t soc_evt;
+  uint32_t err = sd_evt_get(&soc_evt);
+
+  if (NRF_SUCCESS == err)
+  {
+    /*------------- usb power event handler -------------*/
+    int32_t usbevt = (soc_evt == NRF_EVT_POWER_USB_DETECTED   ) ? NRFX_POWER_USB_EVT_DETECTED:
+                     (soc_evt == NRF_EVT_POWER_USB_POWER_READY) ? NRFX_POWER_USB_EVT_READY   :
+                     (soc_evt == NRF_EVT_POWER_USB_REMOVED    ) ? NRFX_POWER_USB_EVT_REMOVED : -1;
+
+    if ( usbevt >= 0) tusb_hal_nrf_power_event(usbevt);
+  }
+
+  return err;
+}
+
+uint32_t proc_ble(void)
+{
+  // do nothing with ble
+  return NRF_ERROR_NOT_FOUND;
+}
+
+void SD_EVT_IRQHandler(void)
+{
+  // process BLE and SOC until there is no more events
+  while( (NRF_ERROR_NOT_FOUND != proc_ble()) || (NRF_ERROR_NOT_FOUND != proc_soc()) )
+  {
+
+  }
+}
+
+void nrf_error_cb(uint32_t id, uint32_t pc, uint32_t info)
+{
+  (void) id;
+  (void) pc;
+  (void) info;
+}
+#endif
diff --git a/tools/build_all.py b/tools/build_all.py
index 4f1bc2636..d652f1507 100644
--- a/tools/build_all.py
+++ b/tools/build_all.py
@@ -5,7 +5,7 @@ import subprocess
 import time
 
 all_device_example = ["cdc_msc_hid", "msc_dual_lun", "hid_generic_inout"]
-all_boards = ["metro_m0_express", "metro_m4_express", "pca10056", "stm32f407g_disc1"]
+all_boards = ["metro_m0_express", "metro_m4_express", "pca10056", "feather_nrf52840_express", "stm32f407g_disc1"]
 
 for example in all_device_example:
     for board in all_boards: