diff --git a/ports/atmel-samd/boards/gemma_m0/pins.c b/ports/atmel-samd/boards/gemma_m0/pins.c
index 196e438e0b..c9c7ea555b 100644
--- a/ports/atmel-samd/boards/gemma_m0/pins.c
+++ b/ports/atmel-samd/boards/gemma_m0/pins.c
@@ -21,6 +21,7 @@ STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
 
     { MP_ROM_QSTR(MP_QSTR_APA102_MOSI), MP_ROM_PTR(&pin_PA00) },
     { MP_ROM_QSTR(MP_QSTR_APA102_SCK),  MP_ROM_PTR(&pin_PA01) },
+
     { MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&board_i2c_obj) },
     { MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&board_spi_obj) },
     { MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&board_uart_obj) },
diff --git a/ports/nrf/Makefile b/ports/nrf/Makefile
index f3cc0e35ba..3ad9748466 100755
--- a/ports/nrf/Makefile
+++ b/ports/nrf/Makefile
@@ -24,9 +24,6 @@ ifneq ($(SD), )
 	include drivers/bluetooth/bluetooth_common.mk
 endif
 
-# qstr definitions (must come before including py.mk)
-QSTR_DEFS = qstrdefsport.h $(BUILD)/pins_qstr.h
-
 FROZEN_MPY_DIR = freeze
 
 # include py core make definitions
@@ -53,6 +50,7 @@ INC += -I./nrfx/drivers/include
 INC += -I../../lib/mp-readline
 INC += -I./drivers/bluetooth
 INC += -I./drivers
+INC += -I./peripherals
 INC += -I../../lib/tinyusb/src
 INC += -I./usb
 
@@ -105,6 +103,7 @@ SRC_C += \
 	drivers/bluetooth/ble_drv.c \
 	drivers/bluetooth/ble_uart.c \
 	boards/$(BOARD)/board.c \
+	boards/$(BOARD)/pins.c \
 	nrfx/mdk/system_$(MCU_SUB_VARIANT).c \
 	nrfx/hal/nrf_nvmc.c \
 	device/$(MCU_VARIANT)/startup_$(MCU_SUB_VARIANT).c \
@@ -119,6 +118,7 @@ SRC_C += \
 	lib/utils/sys_stdio_mphal.c \
 	lib/libc/string0.c \
 	lib/mp-readline/readline.c \
+	peripherals/nrf/$(MCU_CHIP)/pins.c \
 	supervisor/shared/memory.c
 
 DRIVERS_SRC_C += $(addprefix modules/,\
@@ -150,6 +150,7 @@ SRC_COMMON_HAL += \
 	busio/I2C.c \
 	busio/SPI.c \
 	busio/UART.c \
+	neopixel_write/__init__.c \
 	pulseio/__init__.c \
 	pulseio/PulseIn.c \
 	pulseio/PulseOut.c \
@@ -238,7 +239,6 @@ FROZEN_MPY_PY_FILES := $(shell find -L $(FROZEN_MPY_DIR) -type f -name '*.py')
 FROZEN_MPY_MPY_FILES := $(addprefix $(BUILD)/,$(FROZEN_MPY_PY_FILES:.py=.mpy))
 
 OBJ += $(PY_O) $(SUPERVISOR_O) $(addprefix $(BUILD)/, $(SRC_C:.c=.o))
-OBJ += $(BUILD)/pins_gen.o
 OBJ += $(addprefix $(BUILD)/, $(SRC_NRFX:.c=.o))
 OBJ += $(addprefix $(BUILD)/, $(DRIVERS_SRC_C:.c=.o))
 OBJ += $(addprefix $(BUILD)/, $(SRC_COMMON_HAL_EXPANDED:.c=.o))
@@ -333,7 +333,7 @@ dfu-flash: $(BUILD)/dfu-package.zip
 	$(NRFUTIL) --verbose dfu serial --package $^ -p $(SERIAL) -b 115200 --singlebank $(DFU_TOUCH)
 
 ## Create DFU package file
-dfu-gen: $(BUILD)/dfu-package.zip 
+dfu-gen: $(BUILD)/dfu-package.zip
 
 $(BUILD)/dfu-package.zip: $(BUILD)/$(OUTPUT_FILENAME).hex
 	$(NRFUTIL) dfu genpkg --sd-req 0xFFFE --dev-type 0x0052 --application $^ $(BUILD)/dfu-package.zip
@@ -350,29 +350,8 @@ SRC_QSTR += $(SRC_C) $(SRC_SUPERVISOR) $(SRC_MOD) $(DRIVERS_SRC_C) $(SRC_COMMON_
 # SRC_QSTR
 SRC_QSTR_AUTO_DEPS +=
 
-# Making OBJ use an order-only depenedency on the generated pins.h file
-# has the side effect of making the pins.h file before we actually compile
-# any of the objects. The normal dependency generation will deal with the
-# case when pins.h is modified. But when it doesn't exist, we don't know
-# which source files might need it.
-$(OBJ): | $(HEADER_BUILD)/pins.h
-
-# Use a pattern rule here so that make will only call make-pins.py once to make
-# both pins_g.c and pins.h
-$(BUILD)/%_gen.c $(HEADER_BUILD)/%.h $(BUILD)/%_qstr.h: boards/$(BOARD)/%.csv $(MAKE_PINS) $(AF_FILE) $(PREFIX_FILE) | $(HEADER_BUILD)
-	$(ECHO) "Create $@"
-	$(Q)$(PYTHON) $(MAKE_PINS) --board $(BOARD_PINS) --af $(AF_FILE) --prefix $(PREFIX_FILE) --hdr $(GEN_PINS_HDR) --qstr $(GEN_PINS_QSTR) > $(GEN_PINS_SRC)
-
-$(BUILD)/pins_gen.o: $(BUILD)/pins_gen.c
-	$(call compile_c)
-
-MAKE_PINS = boards/make-pins.py
-BOARD_PINS = boards/$(BOARD)/pins.csv
 AF_FILE = $(MCU_VARIANT)_af.csv
 PREFIX_FILE = boards/$(MCU_VARIANT)_prefix.c
-GEN_PINS_SRC = $(BUILD)/pins_gen.c
-GEN_PINS_HDR = $(HEADER_BUILD)/pins.h
-GEN_PINS_QSTR = $(BUILD)/pins_qstr.h
 
 ifneq ($(FROZEN_DIR),)
 # To use frozen source modules, put your .py files in a subdirectory (eg scripts/)
diff --git a/ports/nrf/board_busses.c b/ports/nrf/board_busses.c
new file mode 100644
index 0000000000..91f0def6d3
--- /dev/null
+++ b/ports/nrf/board_busses.c
@@ -0,0 +1,114 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 Scott Shawcroft for Adafruit Industries
+ *
+ * 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.
+ */
+
+#include "shared-bindings/busio/I2C.h"
+#include "shared-bindings/busio/SPI.h"
+#include "shared-bindings/busio/UART.h"
+
+#include "shared-bindings/microcontroller/Pin.h"
+#include "supervisor/shared/translate.h"
+#include "mpconfigboard.h"
+#include "nrf/pins.h"
+#include "py/runtime.h"
+
+#if !defined(DEFAULT_I2C_BUS_SDA) || !defined(DEFAULT_I2C_BUS_SCL)
+    STATIC mp_obj_t board_i2c(void) {
+        mp_raise_NotImplementedError(translate("No default I2C bus"));
+        return NULL;
+    }
+#else
+    STATIC mp_obj_t i2c_singleton = NULL;
+
+    STATIC mp_obj_t board_i2c(void) {
+
+        if (i2c_singleton == NULL) {
+            busio_i2c_obj_t *self = m_new_obj(busio_i2c_obj_t);
+            self->base.type = &busio_i2c_type;
+
+            assert_pin_free(DEFAULT_I2C_BUS_SDA);
+            assert_pin_free(DEFAULT_I2C_BUS_SCL);
+            common_hal_busio_i2c_construct(self, DEFAULT_I2C_BUS_SCL, DEFAULT_I2C_BUS_SDA, 400000, 0);
+            i2c_singleton = (mp_obj_t)self;
+        }
+        return i2c_singleton;
+
+    }
+#endif
+MP_DEFINE_CONST_FUN_OBJ_0(board_i2c_obj, board_i2c);
+
+#if !defined(DEFAULT_SPI_BUS_SCK) || !defined(DEFAULT_SPI_BUS_MISO) || !defined(DEFAULT_SPI_BUS_MOSI)
+    STATIC mp_obj_t board_spi(void) {
+        mp_raise_NotImplementedError(translate("No default SPI bus"));
+        return NULL;
+    }
+#else
+    STATIC mp_obj_t spi_singleton = NULL;
+
+    STATIC mp_obj_t board_spi(void) {
+
+        if (spi_singleton == NULL) {
+            busio_spi_obj_t *self = m_new_obj(busio_spi_obj_t);
+            self->base.type = &busio_spi_type;
+            assert_pin_free(DEFAULT_SPI_BUS_SCK);
+            assert_pin_free(DEFAULT_SPI_BUS_MOSI);
+            assert_pin_free(DEFAULT_SPI_BUS_MISO);
+            const mcu_pin_obj_t* clock = MP_OBJ_TO_PTR(DEFAULT_SPI_BUS_SCK);
+            const mcu_pin_obj_t* mosi = MP_OBJ_TO_PTR(DEFAULT_SPI_BUS_MOSI);
+            const mcu_pin_obj_t* miso = MP_OBJ_TO_PTR(DEFAULT_SPI_BUS_MISO);
+            common_hal_busio_spi_construct(self, clock, mosi, miso);
+            spi_singleton = (mp_obj_t)self;
+        }
+        return spi_singleton;
+    }
+#endif
+MP_DEFINE_CONST_FUN_OBJ_0(board_spi_obj, board_spi);
+
+#if !defined(DEFAULT_UART_BUS_RX) || !defined(DEFAULT_UART_BUS_TX)
+    STATIC mp_obj_t board_uart(void) {
+        mp_raise_NotImplementedError(translate("No default UART bus"));
+        return NULL;
+    }
+#else
+    STATIC mp_obj_t uart_singleton = NULL;
+
+    STATIC mp_obj_t board_uart(void) {
+        if (uart_singleton == NULL) {
+            busio_uart_obj_t *self = m_new_obj(busio_uart_obj_t);
+            self->base.type = &busio_uart_type;
+
+            assert_pin_free(DEFAULT_UART_BUS_RX);
+            assert_pin_free(DEFAULT_UART_BUS_TX);
+
+            const mcu_pin_obj_t* rx = MP_OBJ_TO_PTR(DEFAULT_UART_BUS_RX);
+            const mcu_pin_obj_t* tx = MP_OBJ_TO_PTR(DEFAULT_UART_BUS_TX);
+
+            common_hal_busio_uart_construct(self, tx, rx, 9600, 8, PARITY_NONE, 1, 1000, 64);
+            uart_singleton = (mp_obj_t)self;
+        }
+        return uart_singleton;
+    }
+#endif
+MP_DEFINE_CONST_FUN_OBJ_0(board_uart_obj, board_uart);
diff --git a/ports/nrf/board_busses.h b/ports/nrf/board_busses.h
new file mode 100644
index 0000000000..2a4bfc3d4b
--- /dev/null
+++ b/ports/nrf/board_busses.h
@@ -0,0 +1,39 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 Scott Shawcroft for Adafruit Industries
+ *
+ * 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.
+ */
+
+#ifndef MICROPY_INCLUDED_NRF_BOARD_BUSSES_H
+#define MICROPY_INCLUDED_NRF_BOARD_BUSSES_H
+
+void board_i2c(void);
+extern mp_obj_fun_builtin_fixed_t board_i2c_obj;
+
+void board_spi(void);
+extern mp_obj_fun_builtin_fixed_t board_spi_obj;
+
+void board_uart(void);
+extern mp_obj_fun_builtin_fixed_t board_uart_obj;
+
+#endif  // MICROPY_INCLUDED_NRF_BOARD_BUSSES_H
diff --git a/ports/nrf/boards/feather_nrf52832/mpconfigboard.h b/ports/nrf/boards/feather_nrf52832/mpconfigboard.h
index 84afc5e2d7..0da1abfc47 100644
--- a/ports/nrf/boards/feather_nrf52832/mpconfigboard.h
+++ b/ports/nrf/boards/feather_nrf52832/mpconfigboard.h
@@ -34,3 +34,13 @@
 
 #define PORT_HEAP_SIZE              (32 * 1024)
 #define CIRCUITPY_AUTORELOAD_DELAY_MS 500
+
+#define DEFAULT_I2C_BUS_SCL         (&pin_P0_26)
+#define DEFAULT_I2C_BUS_SDA         (&pin_P0_25)
+
+#define DEFAULT_SPI_BUS_SCK         (&pin_P0_12)
+#define DEFAULT_SPI_BUS_MOSI        (&pin_P0_13)
+#define DEFAULT_SPI_BUS_MISO        (&pin_P0_14)
+
+#define DEFAULT_UART_BUS_RX         (&pin_P0_08)
+#define DEFAULT_UART_BUS_TX         (&pin_P0_06)
diff --git a/ports/nrf/boards/feather_nrf52832/mpconfigboard.mk b/ports/nrf/boards/feather_nrf52832/mpconfigboard.mk
index c370b724e7..5b1f6e939c 100644
--- a/ports/nrf/boards/feather_nrf52832/mpconfigboard.mk
+++ b/ports/nrf/boards/feather_nrf52832/mpconfigboard.mk
@@ -1,6 +1,8 @@
 MCU_SERIES = m4
 MCU_VARIANT = nrf52
+# Historical: nrf52 means nrf52832
 MCU_SUB_VARIANT = nrf52
+MCU_CHIP = nrf52832
 SD ?= s132
 SOFTDEV_VERSION ?= 2.0.1
 
@@ -8,4 +10,4 @@ LD_FILE = boards/feather_nrf52832/custom_nrf52832_dfu_app_$(SOFTDEV_VERSION).ld
 BOOT_FILE = boards/feather_nrf52832/bootloader/feather52_bootloader_$(SOFTDEV_VERSION)_s132_single
 
 BOOT_SETTING_ADDR = 0x7F000
-NRF_DEFINES += -DNRF52832_XXAA
+NRF_DEFINES += -DNRF52832_XXAA -DNRF52832
diff --git a/ports/nrf/boards/feather_nrf52832/pins.c b/ports/nrf/boards/feather_nrf52832/pins.c
new file mode 100644
index 0000000000..b14b944e88
--- /dev/null
+++ b/ports/nrf/boards/feather_nrf52832/pins.c
@@ -0,0 +1,46 @@
+#include "shared-bindings/board/__init__.h"
+
+#include "board_busses.h"
+
+STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
+  { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_P0_02) },
+  { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_P0_03) },
+  { MP_ROM_QSTR(MP_QSTR_A2), MP_ROM_PTR(&pin_P0_04) },
+  { MP_ROM_QSTR(MP_QSTR_A3), MP_ROM_PTR(&pin_P0_05) },
+  { MP_ROM_QSTR(MP_QSTR_A4), MP_ROM_PTR(&pin_P0_28) },
+  { MP_ROM_QSTR(MP_QSTR_A5), MP_ROM_PTR(&pin_P0_29) },
+
+  { MP_ROM_QSTR(MP_QSTR_SCK), MP_ROM_PTR(&pin_P0_12) },
+  { MP_ROM_QSTR(MP_QSTR_MOSI), MP_ROM_PTR(&pin_P0_13) },
+  { MP_ROM_QSTR(MP_QSTR_MISO), MP_ROM_PTR(&pin_P0_14) },
+
+  { MP_ROM_QSTR(MP_QSTR_RX), MP_ROM_PTR(&pin_P0_08) },
+  { MP_ROM_QSTR(MP_QSTR_TX), MP_ROM_PTR(&pin_P0_06) },
+
+  { MP_ROM_QSTR(MP_QSTR_DFU), MP_ROM_PTR(&pin_P0_20) },
+
+  { MP_ROM_QSTR(MP_QSTR_NFC1), MP_ROM_PTR(&pin_P0_09) },
+  { MP_ROM_QSTR(MP_QSTR_NFC2), MP_ROM_PTR(&pin_P0_10) },
+
+  { MP_ROM_QSTR(MP_QSTR_27), MP_ROM_PTR(&pin_P0_27) },
+
+  { MP_ROM_QSTR(MP_QSTR_D30), MP_ROM_PTR(&pin_P0_30) },
+  { MP_ROM_QSTR(MP_QSTR_A6), MP_ROM_PTR(&pin_P0_30) },
+
+  { MP_ROM_QSTR(MP_QSTR_D31), MP_ROM_PTR(&pin_P0_31) },
+  { MP_ROM_QSTR(MP_QSTR_A7), MP_ROM_PTR(&pin_P0_31) },
+
+  { MP_ROM_QSTR(MP_QSTR_D7), MP_ROM_PTR(&pin_P0_07) },
+  { MP_ROM_QSTR(MP_QSTR_D11), MP_ROM_PTR(&pin_P0_11) },
+  { MP_ROM_QSTR(MP_QSTR_D15), MP_ROM_PTR(&pin_P0_15) },
+  { MP_ROM_QSTR(MP_QSTR_D16), MP_ROM_PTR(&pin_P0_16) },
+
+  { MP_ROM_QSTR(MP_QSTR_L), MP_ROM_PTR(&pin_P0_17) },
+
+  { MP_ROM_QSTR(MP_QSTR_LED_BLUE), MP_ROM_PTR(&pin_P0_19) },
+
+  { MP_ROM_QSTR(MP_QSTR_SCL), MP_ROM_PTR(&pin_P0_26) },
+  { MP_ROM_QSTR(MP_QSTR_SDA), MP_ROM_PTR(&pin_P0_25) },
+};
+
+MP_DEFINE_CONST_DICT(board_module_globals, board_module_globals_table);
diff --git a/ports/nrf/boards/feather_nrf52832/pins.csv b/ports/nrf/boards/feather_nrf52832/pins.csv
deleted file mode 100644
index c041900640..0000000000
--- a/ports/nrf/boards/feather_nrf52832/pins.csv
+++ /dev/null
@@ -1,24 +0,0 @@
-A0,P0_02
-A1,P0_03
-A2,P0_04
-A3,P0_05
-TX,P0_06
-RX,P0_08
-NFC1,P0_09
-NFC2,P0_10
-D11,P0_11
-SCK,P0_12
-MOSI,P0_13
-MISO,P0_14
-D15,P0_15
-D16,P0_16
-LED1,P0_17
-LED2,P0_19
-DFU,P0_20
-SDA,P0_25
-SCL,P0_26
-D27,P0_27
-A4,P0_28
-A5,P0_29
-A6,P0_30
-A7,P0_31
diff --git a/ports/nrf/boards/feather_nrf52840_express/mpconfigboard.h b/ports/nrf/boards/feather_nrf52840_express/mpconfigboard.h
index ce21e73861..81818741d1 100644
--- a/ports/nrf/boards/feather_nrf52840_express/mpconfigboard.h
+++ b/ports/nrf/boards/feather_nrf52840_express/mpconfigboard.h
@@ -29,20 +29,16 @@
 
 #define MICROPY_HW_BOARD_NAME       "Adafruit Feather nRF52840 Express"
 #define MICROPY_HW_MCU_NAME         "nRF52840"
-#define MICROPY_PY_SYS_PLATFORM     "Feather52840"
+#define MICROPY_PY_SYS_PLATFORM     "Feather52840Express"
 
-// #define MICROPY_HW_NEOPIXEL         NRF_GPIO_PIN_MAP(0, 13)
+#define MICROPY_HW_NEOPIXEL         (&pin_P0_13)
 
-// #define MICROPY_QSPI_DATA0          NRF_GPIO_PIN_MAP(1, 9)
-// #define MICROPY_QSPI_DATA1          NRF_GPIO_PIN_MAP(0, 11)
-// #define MICROPY_QSPI_DATA2          NRF_GPIO_PIN_MAP(0, 12)
-// #define MICROPY_QSPI_DATA3          NRF_GPIO_PIN_MAP(0, 14)
-// #define MICROPY_QSPI_SCK            NRF_GPIO_PIN_MAP(0, 8)
-// #define MICROPY_QSPI_CS             NRF_GPIO_PIN_MAP(1, 8)
-
-// #define MICROPY_HW_UART_RX          NRF_GPIO_PIN_MAP(0, 8)
-// #define MICROPY_HW_UART_TX          NRF_GPIO_PIN_MAP(0, 6)
-// #define MICROPY_HW_UART_HWFC        (0)
+#define MICROPY_QSPI_DATA0          (&pin_P1_09)
+#define MICROPY_QSPI_DATA1          (&pin_P0_11)
+#define MICROPY_QSPI_DATA2          (&pin_P0_12)
+#define MICROPY_QSPI_DATA3          (&pin_P0_14)
+#define MICROPY_QSPI_SCK            (&pin_P0_08)
+#define MICROPY_QSPI_CS             (&pin_P1_08)
 
 #define CIRCUITPY_AUTORELOAD_DELAY_MS 500
 
@@ -64,12 +60,12 @@
 
 #define BOARD_HAS_CRYSTAL 1
 
-#define DEFAULT_I2C_BUS_SCL         NRF_GPIO_PIN_MAP(1, 11)
-#define DEFAULT_I2C_BUS_SDA         NRF_GPIO_PIN_MAP(1, 12)
+#define DEFAULT_I2C_BUS_SCL         (&pin_P1_11)
+#define DEFAULT_I2C_BUS_SDA         (&pin_P1_12)
 
-#define DEFAULT_SPI_BUS_SCK         NRF_GPIO_PIN_MAP(0, 20)
-#define DEFAULT_SPI_BUS_MOSI        NRF_GPIO_PIN_MAP(0, 23)
-#define DEFAULT_SPI_BUS_MISO        NRF_GPIO_PIN_MAP(0, 22)
+#define DEFAULT_SPI_BUS_SCK         (&pin_P0_20)
+#define DEFAULT_SPI_BUS_MOSI        (&pin_P0_23)
+#define DEFAULT_SPI_BUS_MISO        (&pin_P0_22)
 
-#define DEFAULT_UART_BUS_RX         NRF_GPIO_PIN_MAP(1, 0)
-#define DEFAULT_UART_BUS_TX         NRF_GPIO_PIN_MAP(0, 24)
+#define DEFAULT_UART_BUS_RX         (&pin_P1_0)
+#define DEFAULT_UART_BUS_TX         (&pin_P0_24)
diff --git a/ports/nrf/boards/feather_nrf52840_express/mpconfigboard.mk b/ports/nrf/boards/feather_nrf52840_express/mpconfigboard.mk
index 5c4fde4838..caf580ec4d 100644
--- a/ports/nrf/boards/feather_nrf52840_express/mpconfigboard.mk
+++ b/ports/nrf/boards/feather_nrf52840_express/mpconfigboard.mk
@@ -1,6 +1,7 @@
 MCU_SERIES = m4
 MCU_VARIANT = nrf52
 MCU_SUB_VARIANT = nrf52840
+MCU_CHIP = nrf52840
 SD ?= s140
 SOFTDEV_VERSION ?= 6.1.0
 
@@ -12,4 +13,4 @@ else
 	LD_FILE = boards/adafruit_$(MCU_SUB_VARIANT)_$(SD_LOWER)_v$(firstword $(subst ., ,$(SOFTDEV_VERSION))).ld
 endif
 
-NRF_DEFINES += -DNRF52840_XXAA
+NRF_DEFINES += -DNRF52840_XXAA -DNRF52840
diff --git a/ports/nrf/boards/feather_nrf52840_express/pins.c b/ports/nrf/boards/feather_nrf52840_express/pins.c
new file mode 100644
index 0000000000..0f5eab31d0
--- /dev/null
+++ b/ports/nrf/boards/feather_nrf52840_express/pins.c
@@ -0,0 +1,41 @@
+#include "shared-bindings/board/__init__.h"
+
+#include "board_busses.h"
+
+STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
+  { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_P0_30) },
+  { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_P0_28) },
+  { MP_ROM_QSTR(MP_QSTR_A2), MP_ROM_PTR(&pin_P0_31) },
+  { MP_ROM_QSTR(MP_QSTR_A3), MP_ROM_PTR(&pin_P0_02) },
+  { MP_ROM_QSTR(MP_QSTR_A4), MP_ROM_PTR(&pin_P0_29) },
+  { MP_ROM_QSTR(MP_QSTR_A5), MP_ROM_PTR(&pin_P0_03) },
+
+  { MP_ROM_QSTR(MP_QSTR_AREF), MP_ROM_PTR(&pin_P0_04) },
+  { MP_ROM_QSTR(MP_QSTR_VDIV), MP_ROM_PTR(&pin_P0_05) },
+
+  { MP_ROM_QSTR(MP_QSTR_D5), MP_ROM_PTR(&pin_P1_13) },
+  { MP_ROM_QSTR(MP_QSTR_D6), MP_ROM_PTR(&pin_P1_14) },
+  { MP_ROM_QSTR(MP_QSTR_D9), MP_ROM_PTR(&pin_P1_15) },
+  { MP_ROM_QSTR(MP_QSTR_D10), MP_ROM_PTR(&pin_P0_27) },
+  { MP_ROM_QSTR(MP_QSTR_D11), MP_ROM_PTR(&pin_P0_26) },
+  { MP_ROM_QSTR(MP_QSTR_D12), MP_ROM_PTR(&pin_P0_06) },
+  { MP_ROM_QSTR(MP_QSTR_D13), MP_ROM_PTR(&pin_P0_07) },
+  { MP_ROM_QSTR(MP_QSTR_L), MP_ROM_PTR(&pin_P0_07) },
+
+  { MP_ROM_QSTR(MP_QSTR_NEOPIXEL), MP_ROM_PTR(&pin_P0_13) },
+
+  { MP_ROM_QSTR(MP_QSTR_SCK), MP_ROM_PTR(&pin_P0_20) },
+  { MP_ROM_QSTR(MP_QSTR_MOSI), MP_ROM_PTR(&pin_P0_23) },
+  { MP_ROM_QSTR(MP_QSTR_MISO), MP_ROM_PTR(&pin_P0_22) },
+
+  { MP_ROM_QSTR(MP_QSTR_TXD), MP_ROM_PTR(&pin_P0_24) },
+  { MP_ROM_QSTR(MP_QSTR_RXD), MP_ROM_PTR(&pin_P1_00) },
+
+  { MP_ROM_QSTR(MP_QSTR_SCL), MP_ROM_PTR(&pin_P1_11) },
+  { MP_ROM_QSTR(MP_QSTR_SDA), MP_ROM_PTR(&pin_P1_12) },
+
+  { MP_ROM_QSTR(MP_QSTR_LED_RED), MP_ROM_PTR(&pin_P1_02) },
+  { MP_ROM_QSTR(MP_QSTR_LED_BLUE), MP_ROM_PTR(&pin_P1_10) },
+};
+
+MP_DEFINE_CONST_DICT(board_module_globals, board_module_globals_table);
diff --git a/ports/nrf/boards/feather_nrf52840_express/pins.csv b/ports/nrf/boards/feather_nrf52840_express/pins.csv
deleted file mode 100644
index 284370d060..0000000000
--- a/ports/nrf/boards/feather_nrf52840_express/pins.csv
+++ /dev/null
@@ -1,48 +0,0 @@
-P0_00,P0_00
-P0_01,P0_01
-P0_02,P0_02
-P0_03,P0_03
-P0_04,P0_04
-P0_05,P0_05
-P0_06,P0_06
-P0_07,P0_07
-P0_08,P0_08
-P0_09,P0_09
-P0_10,P0_10
-P0_11,P0_11
-P0_12,P0_12
-P0_13,P0_13
-P0_14,P0_14
-P0_15,P0_15
-P0_16,P0_16
-P0_17,P0_17
-P0_18,P0_18
-P0_19,P0_19
-P0_20,P0_20
-P0_21,P0_21
-P0_22,P0_22
-P0_23,P0_23
-P0_24,P0_24
-P0_25,P0_25
-P0_26,P0_26
-P0_27,P0_27
-P0_28,P0_28
-P0_29,P0_29
-P0_30,P0_30
-P0_31,P0_31
-P1_00,P1_00
-P1_01,P1_01
-P1_02,P1_02
-P1_03,P1_03
-P1_04,P1_04
-P1_05,P1_05
-P1_06,P1_06
-P1_07,P1_07
-P1_08,P1_08
-P1_09,P1_09
-P1_10,P1_10
-P1_11,P1_11
-P1_12,P1_12
-P1_13,P1_13
-P1_14,P1_14
-P1_15,P1_15
diff --git a/ports/nrf/boards/pca10040/mpconfigboard.h b/ports/nrf/boards/pca10040/mpconfigboard.h
index 8fa001dfa1..40035e2cac 100644
--- a/ports/nrf/boards/pca10040/mpconfigboard.h
+++ b/ports/nrf/boards/pca10040/mpconfigboard.h
@@ -28,8 +28,8 @@
 #define MICROPY_HW_MCU_NAME         "nRF52832"
 #define MICROPY_PY_SYS_PLATFORM     "nRF52-DK"
 
-#define MICROPY_HW_UART_RX          NRF_GPIO_PIN_MAP(0, 8)
-#define MICROPY_HW_UART_TX          NRF_GPIO_PIN_MAP(0, 6)
+#define MICROPY_HW_UART_RX          NRF_GPIO_PIN_MAP(0, 11)
+#define MICROPY_HW_UART_TX          NRF_GPIO_PIN_MAP(0, 12)
 #define MICROPY_HW_UART_HWFC        (0)
 
 #define PORT_HEAP_SIZE              (32 * 1024)
diff --git a/ports/nrf/boards/pca10040/mpconfigboard.mk b/ports/nrf/boards/pca10040/mpconfigboard.mk
index 79aa853494..ad11b4f7c7 100644
--- a/ports/nrf/boards/pca10040/mpconfigboard.mk
+++ b/ports/nrf/boards/pca10040/mpconfigboard.mk
@@ -1,6 +1,8 @@
 MCU_SERIES = m4
 MCU_VARIANT = nrf52
+# Historical: nrf52 means nrf52832
 MCU_SUB_VARIANT = nrf52
+MCU_CHIP = nrf52832
 SD ?= s132
 SOFTDEV_VERSION ?= 5.0.0
 
@@ -10,4 +12,4 @@ else
     LD_FILE = boards/nrf52832_512k_64k_s132_$(SOFTDEV_VERSION).ld
 endif
 
-NRF_DEFINES += -DNRF52832_XXAA
+NRF_DEFINES += -DNRF52832_XXAA -DNRF52832
diff --git a/ports/nrf/boards/pca10040/pins.c b/ports/nrf/boards/pca10040/pins.c
new file mode 100644
index 0000000000..9671358c9a
--- /dev/null
+++ b/ports/nrf/boards/pca10040/pins.c
@@ -0,0 +1,40 @@
+#include "shared-bindings/board/__init__.h"
+
+#include "board_busses.h"
+
+STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_P0_00), MP_ROM_PTR(&pin_P0_00) },
+    { MP_ROM_QSTR(MP_QSTR_P0_01), MP_ROM_PTR(&pin_P0_01) },
+    { MP_ROM_QSTR(MP_QSTR_P0_02), MP_ROM_PTR(&pin_P0_02) },
+    { MP_ROM_QSTR(MP_QSTR_P0_03), MP_ROM_PTR(&pin_P0_03) },
+    { MP_ROM_QSTR(MP_QSTR_P0_04), MP_ROM_PTR(&pin_P0_04) },
+    { MP_ROM_QSTR(MP_QSTR_P0_05), MP_ROM_PTR(&pin_P0_05) },
+    { MP_ROM_QSTR(MP_QSTR_P0_06), MP_ROM_PTR(&pin_P0_06) },
+    { MP_ROM_QSTR(MP_QSTR_P0_07), MP_ROM_PTR(&pin_P0_07) },
+    { MP_ROM_QSTR(MP_QSTR_P0_08), MP_ROM_PTR(&pin_P0_08) },
+    { MP_ROM_QSTR(MP_QSTR_P0_09), MP_ROM_PTR(&pin_P0_09) },
+    { MP_ROM_QSTR(MP_QSTR_P0_10), MP_ROM_PTR(&pin_P0_10) },
+    { MP_ROM_QSTR(MP_QSTR_P0_11), MP_ROM_PTR(&pin_P0_11) },
+    { MP_ROM_QSTR(MP_QSTR_P0_12), MP_ROM_PTR(&pin_P0_12) },
+    { MP_ROM_QSTR(MP_QSTR_P0_13), MP_ROM_PTR(&pin_P0_13) },
+    { MP_ROM_QSTR(MP_QSTR_P0_14), MP_ROM_PTR(&pin_P0_14) },
+    { MP_ROM_QSTR(MP_QSTR_P0_15), MP_ROM_PTR(&pin_P0_15) },
+    { MP_ROM_QSTR(MP_QSTR_P0_16), MP_ROM_PTR(&pin_P0_16) },
+    { MP_ROM_QSTR(MP_QSTR_P0_17), MP_ROM_PTR(&pin_P0_17) },
+    { MP_ROM_QSTR(MP_QSTR_P0_18), MP_ROM_PTR(&pin_P0_18) },
+    { MP_ROM_QSTR(MP_QSTR_P0_19), MP_ROM_PTR(&pin_P0_19) },
+    { MP_ROM_QSTR(MP_QSTR_P0_20), MP_ROM_PTR(&pin_P0_20) },
+    { MP_ROM_QSTR(MP_QSTR_P0_21), MP_ROM_PTR(&pin_P0_21) },
+    { MP_ROM_QSTR(MP_QSTR_P0_22), MP_ROM_PTR(&pin_P0_22) },
+    { MP_ROM_QSTR(MP_QSTR_P0_23), MP_ROM_PTR(&pin_P0_23) },
+    { MP_ROM_QSTR(MP_QSTR_P0_24), MP_ROM_PTR(&pin_P0_24) },
+    { MP_ROM_QSTR(MP_QSTR_P0_25), MP_ROM_PTR(&pin_P0_25) },
+    { MP_ROM_QSTR(MP_QSTR_P0_26), MP_ROM_PTR(&pin_P0_26) },
+    { MP_ROM_QSTR(MP_QSTR_P0_27), MP_ROM_PTR(&pin_P0_27) },
+    { MP_ROM_QSTR(MP_QSTR_P0_28), MP_ROM_PTR(&pin_P0_28) },
+    { MP_ROM_QSTR(MP_QSTR_P0_29), MP_ROM_PTR(&pin_P0_29) },
+    { MP_ROM_QSTR(MP_QSTR_P0_30), MP_ROM_PTR(&pin_P0_30) },
+    { MP_ROM_QSTR(MP_QSTR_P0_31), MP_ROM_PTR(&pin_P0_31) },
+};
+
+MP_DEFINE_CONST_DICT(board_module_globals, board_module_globals_table);
diff --git a/ports/nrf/boards/pca10040/pins.csv b/ports/nrf/boards/pca10040/pins.csv
deleted file mode 100644
index 2202224461..0000000000
--- a/ports/nrf/boards/pca10040/pins.csv
+++ /dev/null
@@ -1,31 +0,0 @@
-P0_01,P0_01
-P0_02,P0_02
-P0_03,P0_03
-P0_04,P0_04
-P0_05,P0_05
-P0_06,P0_06
-P0_07,P0_07
-P0_08,P0_08
-P0_09,P0_09
-P0_10,P0_10
-P0_11,P0_11
-P0_12,P0_12
-P0_13,P0_13
-P0_14,P0_14
-P0_15,P0_15
-P0_16,P0_16
-P0_17,P0_17
-P0_18,P0_18
-P0_19,P0_19
-P0_20,P0_20
-P0_21,P0_21
-P0_22,P0_22
-P0_23,P0_23
-P0_24,P0_24
-P0_25,P0_25
-P0_26,P0_26
-P0_27,P0_27
-P0_28,P0_28
-P0_29,P0_29
-P0_30,P0_30
-P0_31,P0_31
diff --git a/ports/nrf/boards/pca10056/mpconfigboard.h b/ports/nrf/boards/pca10056/mpconfigboard.h
index 8195e19479..dbd4226631 100644
--- a/ports/nrf/boards/pca10056/mpconfigboard.h
+++ b/ports/nrf/boards/pca10056/mpconfigboard.h
@@ -28,6 +28,7 @@
 #define MICROPY_HW_MCU_NAME         "nRF52840"
 #define MICROPY_PY_SYS_PLATFORM     "nRF52840-DK"
 
+// See legend on bottom of board
 #define MICROPY_HW_UART_RX          NRF_GPIO_PIN_MAP(0, 8)
 #define MICROPY_HW_UART_TX          NRF_GPIO_PIN_MAP(0, 6)
 #define MICROPY_HW_UART_HWFC        (0)
@@ -37,4 +38,3 @@
 
 // Temp (could be removed) 0: usb cdc (default), 1 : hwuart (jlink)
 #define CFG_HWUART_FOR_SERIAL        0
-
diff --git a/ports/nrf/boards/pca10056/mpconfigboard.mk b/ports/nrf/boards/pca10056/mpconfigboard.mk
index 5c4fde4838..caf580ec4d 100644
--- a/ports/nrf/boards/pca10056/mpconfigboard.mk
+++ b/ports/nrf/boards/pca10056/mpconfigboard.mk
@@ -1,6 +1,7 @@
 MCU_SERIES = m4
 MCU_VARIANT = nrf52
 MCU_SUB_VARIANT = nrf52840
+MCU_CHIP = nrf52840
 SD ?= s140
 SOFTDEV_VERSION ?= 6.1.0
 
@@ -12,4 +13,4 @@ else
 	LD_FILE = boards/adafruit_$(MCU_SUB_VARIANT)_$(SD_LOWER)_v$(firstword $(subst ., ,$(SOFTDEV_VERSION))).ld
 endif
 
-NRF_DEFINES += -DNRF52840_XXAA
+NRF_DEFINES += -DNRF52840_XXAA -DNRF52840
diff --git a/ports/nrf/boards/pca10056/pins.c b/ports/nrf/boards/pca10056/pins.c
new file mode 100644
index 0000000000..1c208f89b5
--- /dev/null
+++ b/ports/nrf/boards/pca10056/pins.c
@@ -0,0 +1,129 @@
+#include "shared-bindings/board/__init__.h"
+
+#include "board_busses.h"
+
+STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_P0_00), MP_ROM_PTR(&pin_P0_00) },
+    { MP_ROM_QSTR(MP_QSTR_P0_01), MP_ROM_PTR(&pin_P0_01) },
+    { MP_ROM_QSTR(MP_QSTR_P0_02), MP_ROM_PTR(&pin_P0_02) },
+
+    { MP_ROM_QSTR(MP_QSTR_P0_03), MP_ROM_PTR(&pin_P0_03) },
+    { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_P0_03) },
+
+    { MP_ROM_QSTR(MP_QSTR_P0_04), MP_ROM_PTR(&pin_P0_04) },
+    { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_P0_04) },
+
+    { MP_ROM_QSTR(MP_QSTR_P0_05), MP_ROM_PTR(&pin_P0_05) },
+    { MP_ROM_QSTR(MP_QSTR_P0_06), MP_ROM_PTR(&pin_P0_06) },
+    { MP_ROM_QSTR(MP_QSTR_P0_07), MP_ROM_PTR(&pin_P0_07) },
+    { MP_ROM_QSTR(MP_QSTR_P0_08), MP_ROM_PTR(&pin_P0_08) },
+    { MP_ROM_QSTR(MP_QSTR_P0_09), MP_ROM_PTR(&pin_P0_09) },
+    { MP_ROM_QSTR(MP_QSTR_P0_10), MP_ROM_PTR(&pin_P0_10) },
+
+    { MP_ROM_QSTR(MP_QSTR_P0_11), MP_ROM_PTR(&pin_P0_11) },
+    { MP_ROM_QSTR(MP_QSTR_BUTTON1), MP_ROM_PTR(&pin_P0_11) },
+
+    { MP_ROM_QSTR(MP_QSTR_P0_12), MP_ROM_PTR(&pin_P0_12) },
+    { MP_ROM_QSTR(MP_QSTR_BUTTON2), MP_ROM_PTR(&pin_P0_12) },
+
+    { MP_ROM_QSTR(MP_QSTR_P0_13), MP_ROM_PTR(&pin_P0_13) },
+    { MP_ROM_QSTR(MP_QSTR_L), MP_ROM_PTR(&pin_P0_13) },
+    { MP_ROM_QSTR(MP_QSTR_LED1), MP_ROM_PTR(&pin_P0_13) },
+
+    { MP_ROM_QSTR(MP_QSTR_P0_14), MP_ROM_PTR(&pin_P0_14) },
+    { MP_ROM_QSTR(MP_QSTR_LED2), MP_ROM_PTR(&pin_P0_14) },
+
+    { MP_ROM_QSTR(MP_QSTR_P0_15), MP_ROM_PTR(&pin_P0_15) },
+    { MP_ROM_QSTR(MP_QSTR_LED3), MP_ROM_PTR(&pin_P0_15) },
+
+    { MP_ROM_QSTR(MP_QSTR_P0_16), MP_ROM_PTR(&pin_P0_16) },
+    { MP_ROM_QSTR(MP_QSTR_LED4), MP_ROM_PTR(&pin_P0_16) },
+
+    { MP_ROM_QSTR(MP_QSTR_P0_17), MP_ROM_PTR(&pin_P0_17) },
+
+    // RESET { MP_ROM_QSTR(MP_QSTR_P0_18), MP_ROM_PTR(&pin_P0_18) },
+
+    { MP_ROM_QSTR(MP_QSTR_P0_19), MP_ROM_PTR(&pin_P0_19) },
+    { MP_ROM_QSTR(MP_QSTR_P0_20), MP_ROM_PTR(&pin_P0_20) },
+    { MP_ROM_QSTR(MP_QSTR_P0_21), MP_ROM_PTR(&pin_P0_21) },
+    { MP_ROM_QSTR(MP_QSTR_P0_22), MP_ROM_PTR(&pin_P0_22) },
+    { MP_ROM_QSTR(MP_QSTR_P0_23), MP_ROM_PTR(&pin_P0_23) },
+
+    { MP_ROM_QSTR(MP_QSTR_P0_24), MP_ROM_PTR(&pin_P0_24) },
+    { MP_ROM_QSTR(MP_QSTR_BUTTON3), MP_ROM_PTR(&pin_P0_24) },
+
+    { MP_ROM_QSTR(MP_QSTR_P0_25), MP_ROM_PTR(&pin_P0_25) },
+    { MP_ROM_QSTR(MP_QSTR_BUTTON4), MP_ROM_PTR(&pin_P0_25) },
+
+    { MP_ROM_QSTR(MP_QSTR_P0_26), MP_ROM_PTR(&pin_P0_26) },
+    { MP_ROM_QSTR(MP_QSTR_SDA), MP_ROM_PTR(&pin_P0_26) },
+
+    { MP_ROM_QSTR(MP_QSTR_P0_27), MP_ROM_PTR(&pin_P0_27) },
+    { MP_ROM_QSTR(MP_QSTR_SCL), MP_ROM_PTR(&pin_P0_27) },
+
+    { MP_ROM_QSTR(MP_QSTR_P0_28), MP_ROM_PTR(&pin_P0_28) },
+    { MP_ROM_QSTR(MP_QSTR_A2), MP_ROM_PTR(&pin_P0_28) },
+
+    { MP_ROM_QSTR(MP_QSTR_P0_29), MP_ROM_PTR(&pin_P0_29) },
+    { MP_ROM_QSTR(MP_QSTR_A3), MP_ROM_PTR(&pin_P0_29) },
+
+    { MP_ROM_QSTR(MP_QSTR_P0_30), MP_ROM_PTR(&pin_P0_30) },
+    { MP_ROM_QSTR(MP_QSTR_A4), MP_ROM_PTR(&pin_P0_30) },
+
+    { MP_ROM_QSTR(MP_QSTR_P0_31), MP_ROM_PTR(&pin_P0_31) },
+    { MP_ROM_QSTR(MP_QSTR_A5), MP_ROM_PTR(&pin_P0_31) },
+
+    { MP_ROM_QSTR(MP_QSTR_P1_00), MP_ROM_PTR(&pin_P1_00) },
+
+    { MP_ROM_QSTR(MP_QSTR_P1_01), MP_ROM_PTR(&pin_P1_01) },
+    { MP_ROM_QSTR(MP_QSTR_D0), MP_ROM_PTR(&pin_P1_01) },
+    { MP_ROM_QSTR(MP_QSTR_RX), MP_ROM_PTR(&pin_P1_01) },
+
+    { MP_ROM_QSTR(MP_QSTR_P1_02), MP_ROM_PTR(&pin_P1_02) },
+    { MP_ROM_QSTR(MP_QSTR_D1), MP_ROM_PTR(&pin_P1_02) },
+    { MP_ROM_QSTR(MP_QSTR_TX), MP_ROM_PTR(&pin_P1_02) },
+
+    { MP_ROM_QSTR(MP_QSTR_P1_03), MP_ROM_PTR(&pin_P1_03) },
+    { MP_ROM_QSTR(MP_QSTR_D2), MP_ROM_PTR(&pin_P1_03) },
+
+    { MP_ROM_QSTR(MP_QSTR_P1_04), MP_ROM_PTR(&pin_P1_04) },
+    { MP_ROM_QSTR(MP_QSTR_D3), MP_ROM_PTR(&pin_P1_04) },
+
+    { MP_ROM_QSTR(MP_QSTR_P1_05), MP_ROM_PTR(&pin_P1_05) },
+    { MP_ROM_QSTR(MP_QSTR_D4), MP_ROM_PTR(&pin_P1_05) },
+
+    { MP_ROM_QSTR(MP_QSTR_P1_06), MP_ROM_PTR(&pin_P1_06) },
+    { MP_ROM_QSTR(MP_QSTR_D5), MP_ROM_PTR(&pin_P1_06) },
+
+    { MP_ROM_QSTR(MP_QSTR_P1_07), MP_ROM_PTR(&pin_P1_07) },
+    { MP_ROM_QSTR(MP_QSTR_D6), MP_ROM_PTR(&pin_P1_07) },
+
+    { MP_ROM_QSTR(MP_QSTR_P1_08), MP_ROM_PTR(&pin_P1_08) },
+    { MP_ROM_QSTR(MP_QSTR_D7), MP_ROM_PTR(&pin_P1_08) },
+
+    { MP_ROM_QSTR(MP_QSTR_P1_09), MP_ROM_PTR(&pin_P1_09) },
+
+    { MP_ROM_QSTR(MP_QSTR_P1_10), MP_ROM_PTR(&pin_P1_10) },
+    { MP_ROM_QSTR(MP_QSTR_D8), MP_ROM_PTR(&pin_P1_10) },
+
+    { MP_ROM_QSTR(MP_QSTR_P1_11), MP_ROM_PTR(&pin_P1_11) },
+    { MP_ROM_QSTR(MP_QSTR_D9), MP_ROM_PTR(&pin_P1_11) },
+
+    { MP_ROM_QSTR(MP_QSTR_P1_12), MP_ROM_PTR(&pin_P1_12) },
+    { MP_ROM_QSTR(MP_QSTR_D10), MP_ROM_PTR(&pin_P1_12) },
+
+    { MP_ROM_QSTR(MP_QSTR_P1_13), MP_ROM_PTR(&pin_P1_13) },
+    { MP_ROM_QSTR(MP_QSTR_D11), MP_ROM_PTR(&pin_P1_13) },
+    { MP_ROM_QSTR(MP_QSTR_MOSI), MP_ROM_PTR(&pin_P1_13) },
+
+    { MP_ROM_QSTR(MP_QSTR_P1_14), MP_ROM_PTR(&pin_P1_14) },
+    { MP_ROM_QSTR(MP_QSTR_D12), MP_ROM_PTR(&pin_P1_14) },
+    { MP_ROM_QSTR(MP_QSTR_MISO), MP_ROM_PTR(&pin_P1_14) },
+
+    // Note that there is no LED on D13.
+    { MP_ROM_QSTR(MP_QSTR_P1_15), MP_ROM_PTR(&pin_P1_15) },
+    { MP_ROM_QSTR(MP_QSTR_D13), MP_ROM_PTR(&pin_P1_15) },
+    { MP_ROM_QSTR(MP_QSTR_SCK), MP_ROM_PTR(&pin_P1_15) },
+};
+
+MP_DEFINE_CONST_DICT(board_module_globals, board_module_globals_table);
diff --git a/ports/nrf/boards/pca10056/pins.csv b/ports/nrf/boards/pca10056/pins.csv
deleted file mode 100644
index 284370d060..0000000000
--- a/ports/nrf/boards/pca10056/pins.csv
+++ /dev/null
@@ -1,48 +0,0 @@
-P0_00,P0_00
-P0_01,P0_01
-P0_02,P0_02
-P0_03,P0_03
-P0_04,P0_04
-P0_05,P0_05
-P0_06,P0_06
-P0_07,P0_07
-P0_08,P0_08
-P0_09,P0_09
-P0_10,P0_10
-P0_11,P0_11
-P0_12,P0_12
-P0_13,P0_13
-P0_14,P0_14
-P0_15,P0_15
-P0_16,P0_16
-P0_17,P0_17
-P0_18,P0_18
-P0_19,P0_19
-P0_20,P0_20
-P0_21,P0_21
-P0_22,P0_22
-P0_23,P0_23
-P0_24,P0_24
-P0_25,P0_25
-P0_26,P0_26
-P0_27,P0_27
-P0_28,P0_28
-P0_29,P0_29
-P0_30,P0_30
-P0_31,P0_31
-P1_00,P1_00
-P1_01,P1_01
-P1_02,P1_02
-P1_03,P1_03
-P1_04,P1_04
-P1_05,P1_05
-P1_06,P1_06
-P1_07,P1_07
-P1_08,P1_08
-P1_09,P1_09
-P1_10,P1_10
-P1_11,P1_11
-P1_12,P1_12
-P1_13,P1_13
-P1_14,P1_14
-P1_15,P1_15
diff --git a/ports/nrf/nrf_pin.h b/ports/nrf/boards/pca10059/board.c
similarity index 71%
rename from ports/nrf/nrf_pin.h
rename to ports/nrf/boards/pca10059/board.c
index 7a0ebea78d..0b667aa9d9 100644
--- a/ports/nrf/nrf_pin.h
+++ b/ports/nrf/boards/pca10059/board.c
@@ -3,7 +3,7 @@
  *
  * The MIT License (MIT)
  *
- * Copyright (c) 2013, 2014 Damien P. George
+ * Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -24,20 +24,30 @@
  * THE SOFTWARE.
  */
 
-#ifndef __MICROPY_INCLUDED_NRF5_PIN_H__
-#define __MICROPY_INCLUDED_NRF5_PIN_H__
+#include <string.h>
+#include <stdbool.h>
+#include "boards/board.h"
+#include "nrfx.h"
+#include "usb.h"
+
+void board_init(void) {
+
+    // Clock
+    NRF_CLOCK->LFCLKSRC = (uint32_t)((CLOCK_LFCLKSRC_SRC_Xtal << CLOCK_LFCLKSRC_SRC_Pos) & CLOCK_LFCLKSRC_SRC_Msk);
+    NRF_CLOCK->TASKS_LFCLKSTART = 1UL;
+
+    usb_init();
+}
+
+bool board_requests_safe_mode(void) {
+  return false;
+}
+
+void reset_board(void) {
+
+}
 
-#include "py/obj.h"
 
-typedef struct {
-    mp_obj_base_t base;
-    qstr name;
 
-    uint32_t port        : 1;
-    uint32_t pin         : 5; // Some ARM processors use 32 bits/PORT
-    uint32_t adc_channel : 4; // 0 is no ADC, ADC channel from 1 to 8
-} pin_obj_t;
 
-extern const mp_obj_type_t mcu_pin_type;
 
-#endif // __MICROPY_INCLUDED_NRF5_PIN_H__
diff --git a/ports/nrf/boards/pca10059/bootloader/6.0.0/pca10056_bootloader_6.0.0_s140.zip b/ports/nrf/boards/pca10059/bootloader/6.0.0/pca10056_bootloader_6.0.0_s140.zip
new file mode 100644
index 0000000000..691f4a1ab3
Binary files /dev/null and b/ports/nrf/boards/pca10059/bootloader/6.0.0/pca10056_bootloader_6.0.0_s140.zip differ
diff --git a/ports/nrf/boards/pca10059/examples/buttons.py b/ports/nrf/boards/pca10059/examples/buttons.py
new file mode 100644
index 0000000000..1a0c5aabbc
--- /dev/null
+++ b/ports/nrf/boards/pca10059/examples/buttons.py
@@ -0,0 +1,26 @@
+import board
+import digitalio
+import gamepad
+import time
+
+pad = gamepad.GamePad(
+    digitalio.DigitalInOut(board.P0_11),
+    digitalio.DigitalInOut(board.P0_12),
+    digitalio.DigitalInOut(board.P0_24),
+    digitalio.DigitalInOut(board.P0_25),
+)
+
+prev_buttons = 0
+
+while True:
+    buttons = pad.get_pressed()
+
+    if buttons != prev_buttons:
+        for i in range(0, 4):
+            bit = (1 << i)
+            if (buttons & bit) != (prev_buttons & bit):
+                print('Button %d %s' % (i + 1, 'pressed' if buttons & bit else 'released'))
+
+        prev_buttons = buttons
+
+    time.sleep(0.1)
diff --git a/ports/nrf/boards/pca10059/mpconfigboard.h b/ports/nrf/boards/pca10059/mpconfigboard.h
new file mode 100644
index 0000000000..bca61fd0f9
--- /dev/null
+++ b/ports/nrf/boards/pca10059/mpconfigboard.h
@@ -0,0 +1,32 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Glenn Ruben Bakke
+ *
+ * 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.
+ */
+
+#define MICROPY_HW_BOARD_NAME       "PCA10059"
+#define MICROPY_HW_MCU_NAME         "nRF52840"
+#define MICROPY_PY_SYS_PLATFORM     "nRF52840-DK"
+
+#define PORT_HEAP_SIZE              (128 * 1024)
+#define CIRCUITPY_AUTORELOAD_DELAY_MS 500
diff --git a/ports/nrf/boards/pca10059/mpconfigboard.mk b/ports/nrf/boards/pca10059/mpconfigboard.mk
new file mode 100644
index 0000000000..f399927fd2
--- /dev/null
+++ b/ports/nrf/boards/pca10059/mpconfigboard.mk
@@ -0,0 +1,17 @@
+MCU_SERIES = m4
+MCU_VARIANT = nrf52
+MCU_SUB_VARIANT = nrf52840
+MCU_CHIP = nrf52840
+SD ?= s140
+SOFTDEV_VERSION ?= 6.1.0
+
+BOOT_SETTING_ADDR = 0xFF000
+BOOT_FILE = boards/$(BOARD)/bootloader/$(SOFTDEV_VERSION)/$(BOARD)_bootloader_$(SOFTDEV_VERSION)_s140
+
+ifeq ($(SD),)
+	LD_FILE = boards/nrf52840_1M_256k.ld
+else
+	LD_FILE = boards/adafruit_$(MCU_SUB_VARIANT)_$(SD_LOWER)_v$(firstword $(subst ., ,$(SOFTDEV_VERSION))).ld
+endif
+
+NRF_DEFINES += -DNRF52840_XXAA -DNRF52840
diff --git a/ports/nrf/boards/pca10059/pins.c b/ports/nrf/boards/pca10059/pins.c
new file mode 100644
index 0000000000..a1916bd046
--- /dev/null
+++ b/ports/nrf/boards/pca10059/pins.c
@@ -0,0 +1,42 @@
+#include "shared-bindings/board/__init__.h"
+
+#include "board_busses.h"
+
+STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_P0_02), MP_ROM_PTR(&pin_P0_02) },
+    { MP_ROM_QSTR(MP_QSTR_P0_04), MP_ROM_PTR(&pin_P0_04) },
+    { MP_ROM_QSTR(MP_QSTR_P0_05), MP_ROM_PTR(&pin_P0_05) },
+    { MP_ROM_QSTR(MP_QSTR_P0_09), MP_ROM_PTR(&pin_P0_09) },
+    { MP_ROM_QSTR(MP_QSTR_P0_10), MP_ROM_PTR(&pin_P0_10) },
+    { MP_ROM_QSTR(MP_QSTR_P0_11), MP_ROM_PTR(&pin_P0_11) },
+    { MP_ROM_QSTR(MP_QSTR_P0_13), MP_ROM_PTR(&pin_P0_13) },
+    { MP_ROM_QSTR(MP_QSTR_P0_14), MP_ROM_PTR(&pin_P0_14) },
+    { MP_ROM_QSTR(MP_QSTR_P0_15), MP_ROM_PTR(&pin_P0_15) },
+    { MP_ROM_QSTR(MP_QSTR_P0_17), MP_ROM_PTR(&pin_P0_17) },
+    { MP_ROM_QSTR(MP_QSTR_P0_20), MP_ROM_PTR(&pin_P0_20) },
+    { MP_ROM_QSTR(MP_QSTR_P0_22), MP_ROM_PTR(&pin_P0_22) },
+    { MP_ROM_QSTR(MP_QSTR_P0_24), MP_ROM_PTR(&pin_P0_24) },
+    { MP_ROM_QSTR(MP_QSTR_P0_26), MP_ROM_PTR(&pin_P0_26) },
+    { MP_ROM_QSTR(MP_QSTR_P0_29), MP_ROM_PTR(&pin_P0_29) },
+    { MP_ROM_QSTR(MP_QSTR_P0_31), MP_ROM_PTR(&pin_P0_31) },
+
+    { MP_ROM_QSTR(MP_QSTR_P1_00), MP_ROM_PTR(&pin_P1_00) },
+    { MP_ROM_QSTR(MP_QSTR_P1_01), MP_ROM_PTR(&pin_P1_01) },
+    { MP_ROM_QSTR(MP_QSTR_P1_02), MP_ROM_PTR(&pin_P1_02) },
+    { MP_ROM_QSTR(MP_QSTR_P1_04), MP_ROM_PTR(&pin_P1_04) },
+    { MP_ROM_QSTR(MP_QSTR_P1_07), MP_ROM_PTR(&pin_P1_07) },
+    { MP_ROM_QSTR(MP_QSTR_P1_10), MP_ROM_PTR(&pin_P1_10) },
+    { MP_ROM_QSTR(MP_QSTR_P1_11), MP_ROM_PTR(&pin_P1_11) },
+    { MP_ROM_QSTR(MP_QSTR_P1_13), MP_ROM_PTR(&pin_P1_13) },
+    { MP_ROM_QSTR(MP_QSTR_P1_15), MP_ROM_PTR(&pin_P1_15) },
+
+    { MP_ROM_QSTR(MP_QSTR_LED1), MP_ROM_PTR(&pin_P0_06) },
+
+    { MP_ROM_QSTR(MP_QSTR_LED2_R), MP_ROM_PTR(&pin_P0_08) },
+    { MP_ROM_QSTR(MP_QSTR_LED2_G), MP_ROM_PTR(&pin_P1_09) },
+    { MP_ROM_QSTR(MP_QSTR_LED2_B), MP_ROM_PTR(&pin_P0_12) },
+
+    { MP_ROM_QSTR(MP_QSTR_SW1), MP_ROM_PTR(&pin_P1_06) },
+};
+
+MP_DEFINE_CONST_DICT(board_module_globals, board_module_globals_table);
diff --git a/ports/nrf/common-hal/analogio/AnalogIn.c b/ports/nrf/common-hal/analogio/AnalogIn.c
index 7951910846..1ebd5ea1aa 100644
--- a/ports/nrf/common-hal/analogio/AnalogIn.c
+++ b/ports/nrf/common-hal/analogio/AnalogIn.c
@@ -38,7 +38,7 @@ void common_hal_analogio_analogin_construct(analogio_analogin_obj_t *self, const
     if (pin->adc_channel == 0)
         mp_raise_ValueError(translate("Pin does not have ADC capabilities"));
 
-    nrf_gpio_cfg_default(NRF_GPIO_PIN_MAP(pin->port, pin->pin));
+    nrf_gpio_cfg_default(pin->number);
 
     self->pin = pin;
 }
@@ -51,7 +51,7 @@ void common_hal_analogio_analogin_deinit(analogio_analogin_obj_t *self) {
     if (common_hal_analogio_analogin_deinited(self))
         return;
 
-    nrf_gpio_cfg_default(NRF_GPIO_PIN_MAP(self->pin->port, self->pin->pin));
+    nrf_gpio_cfg_default(self->pin->number);
 
     self->pin = mp_const_none;
 }
diff --git a/ports/nrf/common-hal/busio/I2C.c b/ports/nrf/common-hal/busio/I2C.c
index 7a29da153e..9390b1fd85 100644
--- a/ports/nrf/common-hal/busio/I2C.c
+++ b/ports/nrf/common-hal/busio/I2C.c
@@ -54,15 +54,15 @@ static uint8_t twi_error_to_mp(const nrfx_err_t err) {
 }
 
 void common_hal_busio_i2c_construct(busio_i2c_obj_t *self, const mcu_pin_obj_t *scl, const mcu_pin_obj_t *sda, uint32_t frequency, uint32_t timeout) {
-    if (scl->pin == sda->pin)
+    if (scl->number == sda->number)
         mp_raise_ValueError(translate("Invalid pins"));
 
     const nrfx_twim_t instance = NRFX_TWIM_INSTANCE(INST_NO);
     self->twim = instance;
 
     nrfx_twim_config_t config = NRFX_TWIM_DEFAULT_CONFIG;
-    config.scl = NRF_GPIO_PIN_MAP(scl->port, scl->pin);
-    config.sda = NRF_GPIO_PIN_MAP(sda->port, sda->pin);
+    config.scl = scl->number;
+    config.sda = sda->number;
 
     // change freq. only if it's less than the default 400K
     if (frequency < 100000) {
diff --git a/ports/nrf/common-hal/busio/SPI.c b/ports/nrf/common-hal/busio/SPI.c
index 10974c4c5b..d4cf1b7ae9 100644
--- a/ports/nrf/common-hal/busio/SPI.c
+++ b/ports/nrf/common-hal/busio/SPI.c
@@ -77,13 +77,13 @@ void common_hal_busio_spi_construct(busio_spi_obj_t *self, const mcu_pin_obj_t *
     nrfx_spim_config_t config = NRFX_SPIM_DEFAULT_CONFIG;
     config.frequency = NRF_SPIM_FREQ_8M;
 
-    config.sck_pin = NRF_GPIO_PIN_MAP(clock->port, clock->pin);
+    config.sck_pin = clock->number;
 
     if (mosi != (mcu_pin_obj_t*)&mp_const_none_obj)
-        config.mosi_pin = NRF_GPIO_PIN_MAP(mosi->port, mosi->pin);
+        config.mosi_pin = mosi->number;
 
     if (miso != (mcu_pin_obj_t*)&mp_const_none_obj)
-        config.miso_pin = NRF_GPIO_PIN_MAP(miso->port, miso->pin);
+        config.miso_pin = miso->number;
 
     nrfx_err_t err = nrfx_spim_init(&self->spim, &config, NULL, NULL);
 
diff --git a/ports/nrf/common-hal/busio/UART.c b/ports/nrf/common-hal/busio/UART.c
index 765c987b5d..f05949e152 100644
--- a/ports/nrf/common-hal/busio/UART.c
+++ b/ports/nrf/common-hal/busio/UART.c
@@ -36,8 +36,6 @@
 
 #include "tick.h"
 
-#include "pins.h"
-
 void common_hal_busio_uart_construct(busio_uart_obj_t *self,
         const mcu_pin_obj_t * tx, const mcu_pin_obj_t * rx, uint32_t baudrate,
         uint8_t bits, uart_parity_t parity, uint8_t stop, uint32_t timeout,
diff --git a/ports/nrf/common-hal/digitalio/DigitalInOut.c b/ports/nrf/common-hal/digitalio/DigitalInOut.c
index 4db9e5efa6..c8ec12c032 100644
--- a/ports/nrf/common-hal/digitalio/DigitalInOut.c
+++ b/ports/nrf/common-hal/digitalio/DigitalInOut.c
@@ -34,7 +34,7 @@ digitalinout_result_t common_hal_digitalio_digitalinout_construct(
         digitalio_digitalinout_obj_t *self, const mcu_pin_obj_t *pin) {
     self->pin = pin;
 
-    nrf_gpio_cfg_input(NRF_GPIO_PIN_MAP(pin->port, pin->pin), NRF_GPIO_PIN_NOPULL);
+    nrf_gpio_cfg_input(pin->number, NRF_GPIO_PIN_NOPULL);
 
     return DIGITALINOUT_OK;
 }
@@ -47,66 +47,53 @@ void common_hal_digitalio_digitalinout_deinit(digitalio_digitalinout_obj_t *self
     if (common_hal_digitalio_digitalinout_deinited(self)) {
         return;
     }
-
-    const uint32_t pin = NRF_GPIO_PIN_MAP(self->pin->port, self->pin->pin);
-    nrf_gpio_cfg_default(pin);
+    nrf_gpio_cfg_default(self->pin->number);
 
     self->pin = mp_const_none;
 }
 
 void common_hal_digitalio_digitalinout_switch_to_input(
         digitalio_digitalinout_obj_t *self, digitalio_pull_t pull) {
-    const uint32_t pin = NRF_GPIO_PIN_MAP(self->pin->port, self->pin->pin);
-
-    nrf_gpio_cfg_input(pin, NRF_GPIO_PIN_NOPULL);
-
+    nrf_gpio_cfg_input(self->pin->number, NRF_GPIO_PIN_NOPULL);
     common_hal_digitalio_digitalinout_set_pull(self, pull);
 }
 
 void common_hal_digitalio_digitalinout_switch_to_output(
         digitalio_digitalinout_obj_t *self, bool value,
         digitalio_drive_mode_t drive_mode) {
-    const uint32_t pin = NRF_GPIO_PIN_MAP(self->pin->port, self->pin->pin);
-
     self->open_drain = (drive_mode == DRIVE_MODE_OPEN_DRAIN);
 
-    nrf_gpio_cfg_input(pin, NRF_GPIO_PIN_NOPULL);
+    nrf_gpio_cfg_input(self->pin->number, NRF_GPIO_PIN_NOPULL);
 
     common_hal_digitalio_digitalinout_set_value(self, value);
 }
 
 digitalio_direction_t common_hal_digitalio_digitalinout_get_direction(
         digitalio_digitalinout_obj_t *self) {
-    const uint32_t pin = NRF_GPIO_PIN_MAP(self->pin->port, self->pin->pin);
-
-    return (nrf_gpio_pin_dir_get(pin) == NRF_GPIO_PIN_DIR_OUTPUT) ? DIRECTION_OUTPUT : DIRECTION_INPUT;
+    return (nrf_gpio_pin_dir_get(self->pin->number) == NRF_GPIO_PIN_DIR_OUTPUT)
+        ? DIRECTION_OUTPUT : DIRECTION_INPUT;
 }
 
 void common_hal_digitalio_digitalinout_set_value(
         digitalio_digitalinout_obj_t *self, bool value) {
-    const uint32_t pin = NRF_GPIO_PIN_MAP(self->pin->port, self->pin->pin);
-
     if (value && self->open_drain) {
-        nrf_gpio_pin_dir_set(pin, NRF_GPIO_PIN_DIR_INPUT);
+        nrf_gpio_pin_dir_set(self->pin->number, NRF_GPIO_PIN_DIR_INPUT);
     } else {
-        nrf_gpio_pin_dir_set(pin, NRF_GPIO_PIN_DIR_OUTPUT);
-        nrf_gpio_pin_write(pin, value);
+        nrf_gpio_pin_dir_set(self->pin->number, NRF_GPIO_PIN_DIR_OUTPUT);
+        nrf_gpio_pin_write(self->pin->number, value);
     }
 }
 
 bool common_hal_digitalio_digitalinout_get_value(
         digitalio_digitalinout_obj_t *self) {
-    const uint32_t pin = NRF_GPIO_PIN_MAP(self->pin->port, self->pin->pin);
-    const nrf_gpio_pin_dir_t dir = nrf_gpio_pin_dir_get(pin);
-
-    if (dir == NRF_GPIO_PIN_DIR_INPUT) {
+    if (nrf_gpio_pin_dir_get(self->pin->number) == NRF_GPIO_PIN_DIR_INPUT) {
         if (self->open_drain)
             return true;
 
-        return nrf_gpio_pin_read(pin);
+        return nrf_gpio_pin_read(self->pin->number);
     }
 
-    return nrf_gpio_pin_out_read(pin);
+    return nrf_gpio_pin_out_read(self->pin->number);
 }
 
 void common_hal_digitalio_digitalinout_set_drive_mode(
@@ -131,7 +118,6 @@ digitalio_drive_mode_t common_hal_digitalio_digitalinout_get_drive_mode(
 
 void common_hal_digitalio_digitalinout_set_pull(
         digitalio_digitalinout_obj_t *self, digitalio_pull_t pull) {
-    const uint32_t pin = NRF_GPIO_PIN_MAP(self->pin->port, self->pin->pin);
     nrf_gpio_pin_pull_t hal_pull = NRF_GPIO_PIN_NOPULL;
 
     switch (pull) {
@@ -146,12 +132,13 @@ void common_hal_digitalio_digitalinout_set_pull(
             break;
     }
 
-    nrf_gpio_cfg_input(pin, hal_pull);
+    nrf_gpio_cfg_input(self->pin->number, hal_pull);
 }
 
 digitalio_pull_t common_hal_digitalio_digitalinout_get_pull(
         digitalio_digitalinout_obj_t *self) {
-    uint32_t pin = NRF_GPIO_PIN_MAP(self->pin->port, self->pin->pin);
+    uint32_t pin = self->pin->number;
+    // Changes pin to be a relative pin number in port.
     NRF_GPIO_Type *reg = nrf_gpio_pin_port_decode(&pin);
 
     if (nrf_gpio_pin_dir_get(pin) == NRF_GPIO_PIN_DIR_OUTPUT) {
@@ -159,7 +146,7 @@ digitalio_pull_t common_hal_digitalio_digitalinout_get_pull(
         return PULL_NONE;
     }
 
-    switch (reg->PIN_CNF[self->pin->pin] & GPIO_PIN_CNF_PULL_Msk) {
+    switch (reg->PIN_CNF[pin] & GPIO_PIN_CNF_PULL_Msk) {
         case NRF_GPIO_PIN_PULLUP:
             return PULL_UP;
 
diff --git a/ports/nrf/common-hal/microcontroller/Pin.c b/ports/nrf/common-hal/microcontroller/Pin.c
index 1b7ac0d838..4d2dea31e1 100644
--- a/ports/nrf/common-hal/microcontroller/Pin.c
+++ b/ports/nrf/common-hal/microcontroller/Pin.c
@@ -24,11 +24,32 @@
  * THE SOFTWARE.
  */
 
-#include "common-hal/microcontroller/Pin.h"
+#include "shared-bindings/microcontroller/Pin.h"
+
 #include "nrf_gpio.h"
 #include "py/mphal.h"
 
+#include "nrf/pins.h"
+#include "supervisor/shared/rgb_led_status.h"
+
+#ifdef MICROPY_HW_NEOPIXEL
+bool neopixel_in_use;
+#endif
+#ifdef MICROPY_HW_APA102_MOSI
+bool apa102_sck_in_use;
+bool apa102_mosi_in_use;
+#endif
+#ifdef SPEAKER_ENABLE_PIN
+bool speaker_enable_in_use;
+#endif
+
+// Bit mask of claimed pins on each of up to two ports. nrf52832 has one port; nrf52840 has two.
+STATIC bool claimed_pins[2];
+
 void reset_all_pins(void) {
+    claimed_pins[0] = 0;
+    claimed_pins[1] = 0;
+
     for (uint32_t pin = 0; pin < NUMBER_OF_PINS; ++pin) {
         nrf_gpio_cfg_default(pin);
     }
@@ -48,7 +69,49 @@ void reset_all_pins(void) {
     #endif
 }
 
+// Mark pin as free and return it to a quiescent state.
+void reset_pin(uint8_t pin) {
+    // Ignore out-of-bound pin numbers. NUMBER_OF_PINS is from nrf_gpio.h.
+    if (pin >= NUMBER_OF_PINS) {
+        return;
+    }
+
+    // Clear claimed bit.
+    claimed_pins[nrf_pin_port(pin)] &= ~(1 << nrf_relative_pin_number(pin));
+
+    #ifdef MICROPY_HW_NEOPIXEL
+    if (pin == MICROPY_HW_NEOPIXEL->number) {
+        neopixel_in_use = false;
+        rgb_led_status_init();
+        return;
+    }
+    #endif
+    #ifdef MICROPY_HW_APA102_MOSI
+    if (pin == MICROPY_HW_APA102_MOSI->number ||
+        pin == MICROPY_HW_APA102_SCK->number) {
+        apa102_mosi_in_use = apa102_mosi_in_use && pin != MICROPY_HW_APA102_MOSI->number;
+        apa102_sck_in_use = apa102_sck_in_use && pin != MICROPY_HW_APA102_SCK->number;
+        if (!apa102_sck_in_use && !apa102_mosi_in_use) {
+            rgb_led_status_init();
+        }
+        return;
+    }
+    #endif
+
+    #ifdef SPEAKER_ENABLE_PIN
+    if (pin == SPEAKER_ENABLE_PIN->number) {
+        speaker_enable_in_use = false;
+        common_hal_digitalio_digitalinout_switch_to_output(
+        nrf_gpio_pin_dir_set(pin, NRF_GPIO_PIN_DIR_OUTPUT);
+        nrf_gpio_pin_write(pin, false);
+    }
+    #endif
+}
+
 void claim_pin(const mcu_pin_obj_t* pin) {
+    // Set bit in claimed_pins bitmask.
+    claimed_pins[nrf_pin_port(pin->number)] |= 1 << nrf_relative_pin_number(pin->number);
+
     #ifdef MICROPY_HW_NEOPIXEL
     if (pin == MICROPY_HW_NEOPIXEL) {
         neopixel_in_use = true;
@@ -91,6 +154,5 @@ bool common_hal_mcu_pin_is_free(const mcu_pin_obj_t *pin) {
     }
     #endif
 
-    // TODO check pin enable.
-    return true;
+    return !(claimed_pins[nrf_pin_port(pin->number)] & (nrf_relative_pin_number(pin->number)));
 }
diff --git a/ports/nrf/common-hal/microcontroller/Pin.h b/ports/nrf/common-hal/microcontroller/Pin.h
index 954d6e51df..1e751c714e 100644
--- a/ports/nrf/common-hal/microcontroller/Pin.h
+++ b/ports/nrf/common-hal/microcontroller/Pin.h
@@ -27,9 +27,10 @@
 #ifndef MICROPY_INCLUDED_NRF_COMMON_HAL_MICROCONTROLLER_PIN_H
 #define MICROPY_INCLUDED_NRF_COMMON_HAL_MICROCONTROLLER_PIN_H
 
-#include "nrf_pin.h"
 #include "py/mphal.h"
 
+#include "peripherals/nrf/pins.h"
+
 #ifdef MICROPY_HW_NEOPIXEL
 extern bool neopixel_in_use;
 #endif
@@ -38,11 +39,21 @@ extern bool apa102_sck_in_use;
 extern bool apa102_mosi_in_use;
 #endif
 
-#define mcu_pin_obj_t pin_obj_t
 void reset_all_pins(void);
 // reset_pin takes the pin number instead of the pointer so that objects don't
 // need to store a full pointer.
 void reset_pin(uint8_t pin);
 void claim_pin(const mcu_pin_obj_t* pin);
 
+// Lower 5 bits of a pin number are the pin number in a port.
+// upper bits (just one bit for current chips) is port number.
+
+static inline uint8_t nrf_pin_port(uint8_t absolute_pin) {
+    return absolute_pin >> 5;
+}
+
+static inline uint8_t nrf_relative_pin_number(uint8_t absolute_pin) {
+    return absolute_pin & 0x1f;
+}
+
 #endif // MICROPY_INCLUDED_NRF_COMMON_HAL_MICROCONTROLLER_PIN_H
diff --git a/ports/nrf/common-hal/microcontroller/__init__.c b/ports/nrf/common-hal/microcontroller/__init__.c
index e88c741365..46fe1e1907 100644
--- a/ports/nrf/common-hal/microcontroller/__init__.c
+++ b/ports/nrf/common-hal/microcontroller/__init__.c
@@ -62,3 +62,59 @@ const mcu_processor_obj_t common_hal_mcu_processor_obj = {
         .type = &mcu_processor_type,
     },
 };
+
+
+STATIC const mp_rom_map_elem_t mcu_pin_globals_table[] = {
+  { MP_ROM_QSTR(MP_QSTR_P0_00), MP_ROM_PTR(&pin_P0_00) },
+  { MP_ROM_QSTR(MP_QSTR_P0_01), MP_ROM_PTR(&pin_P0_01) },
+  { MP_ROM_QSTR(MP_QSTR_P0_02), MP_ROM_PTR(&pin_P0_02) },
+  { MP_ROM_QSTR(MP_QSTR_P0_03), MP_ROM_PTR(&pin_P0_03) },
+  { MP_ROM_QSTR(MP_QSTR_P0_04), MP_ROM_PTR(&pin_P0_04) },
+  { MP_ROM_QSTR(MP_QSTR_P0_05), MP_ROM_PTR(&pin_P0_05) },
+  { MP_ROM_QSTR(MP_QSTR_P0_06), MP_ROM_PTR(&pin_P0_06) },
+  { MP_ROM_QSTR(MP_QSTR_P0_07), MP_ROM_PTR(&pin_P0_07) },
+  { MP_ROM_QSTR(MP_QSTR_P0_08), MP_ROM_PTR(&pin_P0_08) },
+  { MP_ROM_QSTR(MP_QSTR_P0_09), MP_ROM_PTR(&pin_P0_09) },
+  { MP_ROM_QSTR(MP_QSTR_P0_10), MP_ROM_PTR(&pin_P0_10) },
+  { MP_ROM_QSTR(MP_QSTR_P0_11), MP_ROM_PTR(&pin_P0_11) },
+  { MP_ROM_QSTR(MP_QSTR_P0_12), MP_ROM_PTR(&pin_P0_12) },
+  { MP_ROM_QSTR(MP_QSTR_P0_13), MP_ROM_PTR(&pin_P0_13) },
+  { MP_ROM_QSTR(MP_QSTR_P0_13), MP_ROM_PTR(&pin_P0_13) },
+  { MP_ROM_QSTR(MP_QSTR_P0_14), MP_ROM_PTR(&pin_P0_14) },
+  { MP_ROM_QSTR(MP_QSTR_P0_15), MP_ROM_PTR(&pin_P0_15) },
+  { MP_ROM_QSTR(MP_QSTR_P0_16), MP_ROM_PTR(&pin_P0_16) },
+  { MP_ROM_QSTR(MP_QSTR_P0_17), MP_ROM_PTR(&pin_P0_17) },
+  { MP_ROM_QSTR(MP_QSTR_P0_18), MP_ROM_PTR(&pin_P0_18) },
+  { MP_ROM_QSTR(MP_QSTR_P0_19), MP_ROM_PTR(&pin_P0_19) },
+  { MP_ROM_QSTR(MP_QSTR_P0_20), MP_ROM_PTR(&pin_P0_20) },
+  { MP_ROM_QSTR(MP_QSTR_P0_21), MP_ROM_PTR(&pin_P0_21) },
+  { MP_ROM_QSTR(MP_QSTR_P0_22), MP_ROM_PTR(&pin_P0_22) },
+  { MP_ROM_QSTR(MP_QSTR_P0_23), MP_ROM_PTR(&pin_P0_23) },
+  { MP_ROM_QSTR(MP_QSTR_P0_24), MP_ROM_PTR(&pin_P0_24) },
+  { MP_ROM_QSTR(MP_QSTR_P0_25), MP_ROM_PTR(&pin_P0_25) },
+  { MP_ROM_QSTR(MP_QSTR_P0_26), MP_ROM_PTR(&pin_P0_26) },
+  { MP_ROM_QSTR(MP_QSTR_P0_27), MP_ROM_PTR(&pin_P0_27) },
+  { MP_ROM_QSTR(MP_QSTR_P0_28), MP_ROM_PTR(&pin_P0_28) },
+  { MP_ROM_QSTR(MP_QSTR_P0_29), MP_ROM_PTR(&pin_P0_29) },
+  { MP_ROM_QSTR(MP_QSTR_P0_30), MP_ROM_PTR(&pin_P0_30) },
+  { MP_ROM_QSTR(MP_QSTR_P0_31), MP_ROM_PTR(&pin_P0_31) },
+#ifdef NRF52840
+  { MP_ROM_QSTR(MP_QSTR_P1_00), MP_ROM_PTR(&pin_P1_00) },
+  { MP_ROM_QSTR(MP_QSTR_P1_01), MP_ROM_PTR(&pin_P1_01) },
+  { MP_ROM_QSTR(MP_QSTR_P1_02), MP_ROM_PTR(&pin_P1_02) },
+  { MP_ROM_QSTR(MP_QSTR_P1_03), MP_ROM_PTR(&pin_P1_03) },
+  { MP_ROM_QSTR(MP_QSTR_P1_04), MP_ROM_PTR(&pin_P1_04) },
+  { MP_ROM_QSTR(MP_QSTR_P1_05), MP_ROM_PTR(&pin_P1_05) },
+  { MP_ROM_QSTR(MP_QSTR_P1_06), MP_ROM_PTR(&pin_P1_06) },
+  { MP_ROM_QSTR(MP_QSTR_P1_07), MP_ROM_PTR(&pin_P1_07) },
+  { MP_ROM_QSTR(MP_QSTR_P1_08), MP_ROM_PTR(&pin_P1_08) },
+  { MP_ROM_QSTR(MP_QSTR_P1_09), MP_ROM_PTR(&pin_P1_09) },
+  { MP_ROM_QSTR(MP_QSTR_P1_10), MP_ROM_PTR(&pin_P1_10) },
+  { MP_ROM_QSTR(MP_QSTR_P1_11), MP_ROM_PTR(&pin_P1_11) },
+  { MP_ROM_QSTR(MP_QSTR_P1_12), MP_ROM_PTR(&pin_P1_12) },
+  { MP_ROM_QSTR(MP_QSTR_P1_13), MP_ROM_PTR(&pin_P1_13) },
+  { MP_ROM_QSTR(MP_QSTR_P1_14), MP_ROM_PTR(&pin_P1_14) },
+  { MP_ROM_QSTR(MP_QSTR_P1_15), MP_ROM_PTR(&pin_P1_15) },
+#endif
+};
+MP_DEFINE_CONST_DICT(mcu_pin_globals, mcu_pin_globals_table);
diff --git a/ports/nrf/common-hal/neopixel_write/__init__.c b/ports/nrf/common-hal/neopixel_write/__init__.c
new file mode 100644
index 0000000000..a29e1a1369
--- /dev/null
+++ b/ports/nrf/common-hal/neopixel_write/__init__.c
@@ -0,0 +1,161 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Scott Shawcroft for Adafruit Industries
+ *
+ * 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.
+ */
+#include "py/mphal.h"
+
+#include "shared-bindings/neopixel_write/__init__.h"
+
+#include "tick.h"
+
+// This magical macro makes sure the delay isn't optimized out and is the
+// minimal three instructions.
+#define delay_cycles(cycles) \
+{ \
+    uint32_t t; \
+    asm volatile ( \
+        "movs %[t], %[c]\n\t" \
+        "loop%=:\n\t" \
+        "subs	%[t], #1\n\t" \
+        "bne.n  loop%=" : [t] "=r"(t) : [c] "I" (cycles)); \
+    }
+
+uint64_t next_start_tick_ms = 0;
+uint32_t next_start_tick_us = 1000;
+
+void common_hal_neopixel_write(const digitalio_digitalinout_obj_t* digitalinout, uint8_t *pixels, uint32_t numBytes) {
+// TODO: Figure out timing delays on nRF. Turn off cache using ICACHECNF register.
+/*
+    // This is adapted directly from the Adafruit NeoPixel library SAMD21G18A code:
+    // https://github.com/adafruit/Adafruit_NeoPixel/blob/master/Adafruit_NeoPixel.cpp
+    uint8_t  *ptr, *end, p, bitMask;
+    uint32_t  pinMask;
+    PortGroup* port;
+
+    // This must be called while interrupts are on in case we're waiting for a
+    // future ms tick.
+    wait_until(next_start_tick_ms, next_start_tick_us);
+
+    // Turn off interrupts of any kind during timing-sensitive code.
+    mp_hal_disable_all_interrupts();
+
+
+    // Make sure the NVM cache is consistently timed.
+
+    NVMCTRL->CTRLB.bit.READMODE = NVMCTRL_CTRLB_READMODE_DETERMINISTIC_Val;
+    #endif
+
+    uint32_t pin = digitalinout->pin->number;
+    port    =  &PORT->Group[GPIO_PORT(pin)];  // Convert GPIO # to port register
+    pinMask =  (1UL << (pin % 32));  // From port_pin_set_output_level ASF code.
+    ptr     =  pixels;
+    end     =  ptr + numBytes;
+    p       = *ptr++;
+    bitMask =  0x80;
+
+    volatile uint32_t *set = &(port->OUTSET.reg),
+                      *clr = &(port->OUTCLR.reg);
+
+    for(;;) {
+        *set = pinMask;
+        // This is the time where the line is always high regardless of the bit.
+        // For the SK6812 its 0.3us +- 0.15us
+        #ifdef SAMD21
+        asm("nop; nop;");
+        #endif
+        #ifdef SAMD51
+        delay_cycles(3);
+        #endif
+        if(p & bitMask) {
+            // This is the high delay unique to a one bit.
+            // For the SK6812 its 0.3us
+            #ifdef SAMD21
+            asm("nop; nop; nop; nop; nop; nop; nop;");
+            #endif
+            #ifdef SAMD51
+            delay_cycles(11);
+            #endif
+            *clr = pinMask;
+        } else {
+            *clr = pinMask;
+            // This is the low delay unique to a zero bit.
+            // For the SK6812 its 0.3us
+            #ifdef SAMD21
+            asm("nop; nop;");
+            #endif
+            #ifdef SAMD51
+            delay_cycles(3);
+            #endif
+        }
+        if((bitMask >>= 1) != 0) {
+            // This is the delay between bits in a byte and is the 1 code low
+            // level time from the datasheet.
+            // For the SK6812 its 0.6us +- 0.15us
+            #ifdef SAMD21
+            asm("nop; nop; nop; nop; nop;");
+            #endif
+            #ifdef SAMD51
+            delay_cycles(20);
+            #endif
+        } else {
+            if(ptr >= end) break;
+            p       = *ptr++;
+            bitMask = 0x80;
+            // This is the delay between bytes. It's similar to the other branch
+            // in the if statement except its tuned to account for the time the
+            // above operations take.
+            // For the SK6812 its 0.6us +- 0.15us
+            #ifdef SAMD51
+            delay_cycles(15);
+            #endif
+        }
+    }
+
+    #ifdef SAMD21
+    // Speed up! (But inconsistent timing.)
+    NVMCTRL->CTRLB.bit.READMODE = NVMCTRL_CTRLB_READMODE_NO_MISS_PENALTY_Val;
+    #endif
+
+    #ifdef SAMD51
+    // Turn instruction, data, and NVM caches back on.
+    hri_cmcc_clear_CFG_reg(CMCC, CMCC_CFG_DCDIS | CMCC_CFG_ICDIS);
+    hri_nvmctrl_clear_CTRLA_CACHEDIS0_bit(NVMCTRL);
+    hri_nvmctrl_clear_CTRLA_CACHEDIS1_bit(NVMCTRL);
+
+    #endif
+
+    // ticks_ms may be out of date at this point because we stopped the
+    // interrupt. We'll risk it anyway.
+    current_tick(&next_start_tick_ms, &next_start_tick_us);
+    if (next_start_tick_us < 100) {
+        next_start_tick_ms += 1;
+        next_start_tick_us = 100 - next_start_tick_us;
+    } else {
+        next_start_tick_us -= 100;
+    }
+
+    // Turn on interrupts after timing-sensitive code.
+    mp_hal_enable_all_interrupts();
+*/
+}
diff --git a/ports/nrf/common-hal/pulseio/PWMOut.c b/ports/nrf/common-hal/pulseio/PWMOut.c
index 0f14610924..c3c51d5669 100644
--- a/ports/nrf/common-hal/pulseio/PWMOut.c
+++ b/ports/nrf/common-hal/pulseio/PWMOut.c
@@ -146,7 +146,7 @@ void common_hal_pulseio_pwmout_construct(pulseio_pwmout_obj_t* self,
   // check if mapped to PWM channel already
   for(int i=0; i<PWM_MAX_MODULE; i++)
   {
-    int ch = pin2channel(pwm_arr[i], NRF_GPIO_PIN_MAP(pin->port, pin->pin));
+    int ch = pin2channel(pwm_arr[i], pin->number);
     if ( ch >= 0 )
     {
       self->pwm = pwm_arr[i];
@@ -163,12 +163,12 @@ void common_hal_pulseio_pwmout_construct(pulseio_pwmout_obj_t* self,
 
   if (self->pwm)
   {
-    nrf_gpio_cfg_output(NRF_GPIO_PIN_MAP(pin->port, pin->pin));
+    nrf_gpio_cfg_output(pin->number);
 
     // disable before mapping pin channel
     self->pwm->ENABLE = 0;
 
-    self->pwm->PSEL.OUT[self->channel] = NRF_GPIO_PIN_MAP(pin->port, pin->pin);
+    self->pwm->PSEL.OUT[self->channel] = pin->number;
 
     self->pwm->COUNTERTOP = (PWM_MAX_FREQ/frequency);
     self->freq = frequency;
@@ -203,7 +203,7 @@ void common_hal_pulseio_pwmout_deinit(pulseio_pwmout_obj_t* self) {
     }
   }
 
-  nrf_gpio_cfg_default(NRF_GPIO_PIN_MAP(self->pin->port, self->pin->pin));
+  nrf_gpio_cfg_default(self->pin->number);
 
   self->pwm = NULL;
   self->pin = mp_const_none;
diff --git a/ports/nrf/nrf52_af.csv b/ports/nrf/nrf52_af.csv
deleted file mode 100644
index 272d9cd09b..0000000000
--- a/ports/nrf/nrf52_af.csv
+++ /dev/null
@@ -1,48 +0,0 @@
-P0_00
-P0_01
-P0_02,AIN0
-P0_03,AIN1
-P0_04,AIN2
-P0_05,AIN3
-P0_06
-P0_07
-P0_08
-P0_09
-P0_10
-P0_11
-P0_12
-P0_13
-P0_14
-P0_15
-P0_16
-P0_17
-P0_18
-P0_19
-P0_20
-P0_21
-P0_22
-P0_23
-P0_24
-P0_25
-P0_26
-P0_27
-P0_28,AIN4
-P0_29,AIN5
-P0_30,AIN6
-P0_31,AIN7
-P1_00
-P1_01
-P1_02
-P1_03
-P1_04
-P1_05
-P1_06
-P1_07
-P1_08
-P1_09
-P1_10
-P1_11
-P1_12
-P1_13
-P1_14
-P1_15
diff --git a/ports/nrf/peripherals/nrf/nrf52832/pins.c b/ports/nrf/peripherals/nrf/nrf52832/pins.c
new file mode 100644
index 0000000000..fdfa766ec8
--- /dev/null
+++ b/ports/nrf/peripherals/nrf/nrf52832/pins.c
@@ -0,0 +1,65 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 Dan Halbert for Adafruit Industries
+ *
+ * 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.
+ */
+
+// DO NOT include this file directly. Use shared-bindings/microcontroller/Pin.h instead to ensure
+// that all necessary includes are already included.
+
+#include "py/obj.h"
+#include "py/mphal.h"
+#include "nrf/pins.h"
+
+const mcu_pin_obj_t pin_P0_00 = PIN(P0_00, 0, 0, 0);
+const mcu_pin_obj_t pin_P0_01 = PIN(P0_01, 0, 1, 0);
+const mcu_pin_obj_t pin_P0_02 = PIN(P0_02, 0, 2, SAADC_CH_PSELP_PSELP_AnalogInput0);
+const mcu_pin_obj_t pin_P0_03 = PIN(P0_03, 0, 3, SAADC_CH_PSELP_PSELP_AnalogInput1);
+const mcu_pin_obj_t pin_P0_04 = PIN(P0_04, 0, 4, SAADC_CH_PSELP_PSELP_AnalogInput2);
+const mcu_pin_obj_t pin_P0_05 = PIN(P0_05, 0, 5, SAADC_CH_PSELP_PSELP_AnalogInput3);
+const mcu_pin_obj_t pin_P0_06 = PIN(P0_06, 0, 6, 0);
+const mcu_pin_obj_t pin_P0_07 = PIN(P0_07, 0, 7, 0);
+const mcu_pin_obj_t pin_P0_08 = PIN(P0_08, 0, 8, 0);
+const mcu_pin_obj_t pin_P0_09 = PIN(P0_09, 0, 9, 0);
+const mcu_pin_obj_t pin_P0_10 = PIN(P0_10, 0, 10, 0);
+const mcu_pin_obj_t pin_P0_11 = PIN(P0_11, 0, 11, 0);
+const mcu_pin_obj_t pin_P0_12 = PIN(P0_12, 0, 12, 0);
+const mcu_pin_obj_t pin_P0_13 = PIN(P0_13, 0, 13, 0);
+const mcu_pin_obj_t pin_P0_14 = PIN(P0_14, 0, 14, 0);
+const mcu_pin_obj_t pin_P0_15 = PIN(P0_15, 0, 15, 0);
+const mcu_pin_obj_t pin_P0_16 = PIN(P0_16, 0, 16, 0);
+const mcu_pin_obj_t pin_P0_17 = PIN(P0_17, 0, 17, 0);
+const mcu_pin_obj_t pin_P0_18 = PIN(P0_18, 0, 18, 0);
+const mcu_pin_obj_t pin_P0_19 = PIN(P0_19, 0, 19, 0);
+const mcu_pin_obj_t pin_P0_20 = PIN(P0_20, 0, 20, 0);
+const mcu_pin_obj_t pin_P0_21 = PIN(P0_21, 0, 21, 0);
+const mcu_pin_obj_t pin_P0_22 = PIN(P0_22, 0, 22, 0);
+const mcu_pin_obj_t pin_P0_23 = PIN(P0_23, 0, 23, 0);
+const mcu_pin_obj_t pin_P0_24 = PIN(P0_24, 0, 24, 0);
+const mcu_pin_obj_t pin_P0_25 = PIN(P0_25, 0, 25, 0);
+const mcu_pin_obj_t pin_P0_26 = PIN(P0_26, 0, 26, 0);
+const mcu_pin_obj_t pin_P0_27 = PIN(P0_27, 0, 27, 0);
+const mcu_pin_obj_t pin_P0_28 = PIN(P0_28, 0, 28, SAADC_CH_PSELP_PSELP_AnalogInput4);
+const mcu_pin_obj_t pin_P0_29 = PIN(P0_29, 0, 29, SAADC_CH_PSELP_PSELP_AnalogInput5);
+const mcu_pin_obj_t pin_P0_30 = PIN(P0_30, 0, 30, SAADC_CH_PSELP_PSELP_AnalogInput6);
+const mcu_pin_obj_t pin_P0_31 = PIN(P0_31, 0, 31, SAADC_CH_PSELP_PSELP_AnalogInput7);
diff --git a/ports/nrf/peripherals/nrf/nrf52832/pins.h b/ports/nrf/peripherals/nrf/nrf52832/pins.h
new file mode 100644
index 0000000000..0bc039df00
--- /dev/null
+++ b/ports/nrf/peripherals/nrf/nrf52832/pins.h
@@ -0,0 +1,65 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 by Dan Halbert for Adafruit Industries
+ *
+ * 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.
+ */
+
+#ifndef MICROPY_INCLUDED_NRF_PERIPHERALS_NRF52832_PINS_H
+#define MICROPY_INCLUDED_NRF_PERIPHERALS_NRF52832_PINS_H
+
+void reset_pin(uint8_t pin);
+
+extern const mcu_pin_obj_t pin_P0_00;
+extern const mcu_pin_obj_t pin_P0_01;
+extern const mcu_pin_obj_t pin_P0_02;
+extern const mcu_pin_obj_t pin_P0_03;
+extern const mcu_pin_obj_t pin_P0_04;
+extern const mcu_pin_obj_t pin_P0_05;
+extern const mcu_pin_obj_t pin_P0_06;
+extern const mcu_pin_obj_t pin_P0_07;
+extern const mcu_pin_obj_t pin_P0_08;
+extern const mcu_pin_obj_t pin_P0_09;
+extern const mcu_pin_obj_t pin_P0_10;
+extern const mcu_pin_obj_t pin_P0_11;
+extern const mcu_pin_obj_t pin_P0_12;
+extern const mcu_pin_obj_t pin_P0_13;
+extern const mcu_pin_obj_t pin_P0_14;
+extern const mcu_pin_obj_t pin_P0_15;
+extern const mcu_pin_obj_t pin_P0_16;
+extern const mcu_pin_obj_t pin_P0_17;
+extern const mcu_pin_obj_t pin_P0_18;
+extern const mcu_pin_obj_t pin_P0_19;
+extern const mcu_pin_obj_t pin_P0_20;
+extern const mcu_pin_obj_t pin_P0_21;
+extern const mcu_pin_obj_t pin_P0_22;
+extern const mcu_pin_obj_t pin_P0_23;
+extern const mcu_pin_obj_t pin_P0_24;
+extern const mcu_pin_obj_t pin_P0_25;
+extern const mcu_pin_obj_t pin_P0_26;
+extern const mcu_pin_obj_t pin_P0_27;
+extern const mcu_pin_obj_t pin_P0_28;
+extern const mcu_pin_obj_t pin_P0_29;
+extern const mcu_pin_obj_t pin_P0_30;
+extern const mcu_pin_obj_t pin_P0_31;
+
+#endif // MICROPY_INCLUDED_NRF_PERIPHERALS_NRF52832_PINS_H
diff --git a/ports/nrf/peripherals/nrf/nrf52840/pins.c b/ports/nrf/peripherals/nrf/nrf52840/pins.c
new file mode 100644
index 0000000000..b7dc8e65e0
--- /dev/null
+++ b/ports/nrf/peripherals/nrf/nrf52840/pins.c
@@ -0,0 +1,78 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 Dan Halbert for Adafruit Industries
+ *
+ * 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.
+ */
+
+#include "py/obj.h"
+#include "py/mphal.h"
+#include "nrf/pins.h"
+
+const mcu_pin_obj_t pin_P0_00 = PIN(P0_00, 0, 0, 0);
+const mcu_pin_obj_t pin_P0_01 = PIN(P0_01, 0, 1, 0);
+const mcu_pin_obj_t pin_P0_02 = PIN(P0_02, 0, 2, SAADC_CH_PSELP_PSELP_AnalogInput0);
+const mcu_pin_obj_t pin_P0_03 = PIN(P0_03, 0, 3, SAADC_CH_PSELP_PSELP_AnalogInput1);
+const mcu_pin_obj_t pin_P0_04 = PIN(P0_04, 0, 4, SAADC_CH_PSELP_PSELP_AnalogInput2);
+const mcu_pin_obj_t pin_P0_05 = PIN(P0_05, 0, 5, SAADC_CH_PSELP_PSELP_AnalogInput3);
+const mcu_pin_obj_t pin_P0_06 = PIN(P0_06, 0, 6, 0);
+const mcu_pin_obj_t pin_P0_07 = PIN(P0_07, 0, 7, 0);
+const mcu_pin_obj_t pin_P0_08 = PIN(P0_08, 0, 8, 0);
+const mcu_pin_obj_t pin_P0_09 = PIN(P0_09, 0, 9, 0);
+const mcu_pin_obj_t pin_P0_10 = PIN(P0_10, 0, 10, 0);
+const mcu_pin_obj_t pin_P0_11 = PIN(P0_11, 0, 11, 0);
+const mcu_pin_obj_t pin_P0_12 = PIN(P0_12, 0, 12, 0);
+const mcu_pin_obj_t pin_P0_13 = PIN(P0_13, 0, 13, 0);
+const mcu_pin_obj_t pin_P0_14 = PIN(P0_14, 0, 14, 0);
+const mcu_pin_obj_t pin_P0_15 = PIN(P0_15, 0, 15, 0);
+const mcu_pin_obj_t pin_P0_16 = PIN(P0_16, 0, 16, 0);
+const mcu_pin_obj_t pin_P0_17 = PIN(P0_17, 0, 17, 0);
+const mcu_pin_obj_t pin_P0_18 = PIN(P0_18, 0, 18, 0);
+const mcu_pin_obj_t pin_P0_19 = PIN(P0_19, 0, 19, 0);
+const mcu_pin_obj_t pin_P0_20 = PIN(P0_20, 0, 20, 0);
+const mcu_pin_obj_t pin_P0_21 = PIN(P0_21, 0, 21, 0);
+const mcu_pin_obj_t pin_P0_22 = PIN(P0_22, 0, 22, 0);
+const mcu_pin_obj_t pin_P0_23 = PIN(P0_23, 0, 23, 0);
+const mcu_pin_obj_t pin_P0_24 = PIN(P0_24, 0, 24, 0);
+const mcu_pin_obj_t pin_P0_25 = PIN(P0_25, 0, 25, 0);
+const mcu_pin_obj_t pin_P0_26 = PIN(P0_26, 0, 26, 0);
+const mcu_pin_obj_t pin_P0_27 = PIN(P0_27, 0, 27, 0);
+const mcu_pin_obj_t pin_P0_28 = PIN(P0_28, 0, 28, SAADC_CH_PSELP_PSELP_AnalogInput4);
+const mcu_pin_obj_t pin_P0_29 = PIN(P0_29, 0, 29, SAADC_CH_PSELP_PSELP_AnalogInput5);
+const mcu_pin_obj_t pin_P0_30 = PIN(P0_30, 0, 30, SAADC_CH_PSELP_PSELP_AnalogInput6);
+const mcu_pin_obj_t pin_P0_31 = PIN(P0_31, 0, 31, SAADC_CH_PSELP_PSELP_AnalogInput7);
+const mcu_pin_obj_t pin_P1_00 = PIN(P1_00, 1, 0, 0);
+const mcu_pin_obj_t pin_P1_01 = PIN(P1_01, 1, 1, 0);
+const mcu_pin_obj_t pin_P1_02 = PIN(P1_02, 1, 2, 0);
+const mcu_pin_obj_t pin_P1_03 = PIN(P1_03, 1, 3, 0);
+const mcu_pin_obj_t pin_P1_04 = PIN(P1_04, 1, 4, 0);
+const mcu_pin_obj_t pin_P1_05 = PIN(P1_05, 1, 5, 0);
+const mcu_pin_obj_t pin_P1_06 = PIN(P1_06, 1, 6, 0);
+const mcu_pin_obj_t pin_P1_07 = PIN(P1_07, 1, 7, 0);
+const mcu_pin_obj_t pin_P1_08 = PIN(P1_08, 1, 8, 0);
+const mcu_pin_obj_t pin_P1_09 = PIN(P1_09, 1, 9, 0);
+const mcu_pin_obj_t pin_P1_10 = PIN(P1_10, 1, 10, 0);
+const mcu_pin_obj_t pin_P1_11 = PIN(P1_11, 1, 11, 0);
+const mcu_pin_obj_t pin_P1_12 = PIN(P1_12, 1, 12, 0);
+const mcu_pin_obj_t pin_P1_13 = PIN(P1_13, 1, 13, 0);
+const mcu_pin_obj_t pin_P1_14 = PIN(P1_14, 1, 14, 0);
+const mcu_pin_obj_t pin_P1_15 = PIN(P1_15, 1, 15, 0);
diff --git a/ports/nrf/peripherals/nrf/nrf52840/pins.h b/ports/nrf/peripherals/nrf/nrf52840/pins.h
new file mode 100644
index 0000000000..80f1d14af3
--- /dev/null
+++ b/ports/nrf/peripherals/nrf/nrf52840/pins.h
@@ -0,0 +1,81 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 by Dan Halbert for Adafruit Industries
+ *
+ * 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.
+ */
+
+#ifndef MICROPY_INCLUDED_NRF_PERIPHERALS_NRF52840_PINS_H
+#define MICROPY_INCLUDED_NRF_PERIPHERALS_NRF52840_PINS_H
+
+void reset_pin(uint8_t pin);
+
+extern const mcu_pin_obj_t pin_P0_00;
+extern const mcu_pin_obj_t pin_P0_01;
+extern const mcu_pin_obj_t pin_P0_02;
+extern const mcu_pin_obj_t pin_P0_03;
+extern const mcu_pin_obj_t pin_P0_04;
+extern const mcu_pin_obj_t pin_P0_05;
+extern const mcu_pin_obj_t pin_P0_06;
+extern const mcu_pin_obj_t pin_P0_07;
+extern const mcu_pin_obj_t pin_P0_08;
+extern const mcu_pin_obj_t pin_P0_09;
+extern const mcu_pin_obj_t pin_P0_10;
+extern const mcu_pin_obj_t pin_P0_11;
+extern const mcu_pin_obj_t pin_P0_12;
+extern const mcu_pin_obj_t pin_P0_13;
+extern const mcu_pin_obj_t pin_P0_14;
+extern const mcu_pin_obj_t pin_P0_15;
+extern const mcu_pin_obj_t pin_P0_16;
+extern const mcu_pin_obj_t pin_P0_17;
+extern const mcu_pin_obj_t pin_P0_18;
+extern const mcu_pin_obj_t pin_P0_19;
+extern const mcu_pin_obj_t pin_P0_20;
+extern const mcu_pin_obj_t pin_P0_21;
+extern const mcu_pin_obj_t pin_P0_22;
+extern const mcu_pin_obj_t pin_P0_23;
+extern const mcu_pin_obj_t pin_P0_24;
+extern const mcu_pin_obj_t pin_P0_25;
+extern const mcu_pin_obj_t pin_P0_26;
+extern const mcu_pin_obj_t pin_P0_27;
+extern const mcu_pin_obj_t pin_P0_28;
+extern const mcu_pin_obj_t pin_P0_29;
+extern const mcu_pin_obj_t pin_P0_30;
+extern const mcu_pin_obj_t pin_P0_31;
+extern const mcu_pin_obj_t pin_P1_00;
+extern const mcu_pin_obj_t pin_P1_01;
+extern const mcu_pin_obj_t pin_P1_02;
+extern const mcu_pin_obj_t pin_P1_03;
+extern const mcu_pin_obj_t pin_P1_04;
+extern const mcu_pin_obj_t pin_P1_05;
+extern const mcu_pin_obj_t pin_P1_06;
+extern const mcu_pin_obj_t pin_P1_07;
+extern const mcu_pin_obj_t pin_P1_08;
+extern const mcu_pin_obj_t pin_P1_09;
+extern const mcu_pin_obj_t pin_P1_10;
+extern const mcu_pin_obj_t pin_P1_11;
+extern const mcu_pin_obj_t pin_P1_12;
+extern const mcu_pin_obj_t pin_P1_13;
+extern const mcu_pin_obj_t pin_P1_14;
+extern const mcu_pin_obj_t pin_P1_15;
+
+#endif // MICROPY_INCLUDED_NRF_PERIPHERALS_NRF52840_PINS_H
diff --git a/ports/nrf/peripherals/nrf/pins.h b/ports/nrf/peripherals/nrf/pins.h
new file mode 100644
index 0000000000..ca58f5fad0
--- /dev/null
+++ b/ports/nrf/peripherals/nrf/pins.h
@@ -0,0 +1,69 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2013, 2014 Damien P. George
+ *
+ * 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.
+ */
+
+// DO NOT include this file directly. Use shared-bindings/microcontroller/Pin.h instead to ensure
+// that all necessary includes are already included.
+
+#ifndef __MICROPY_INCLUDED_NRF_PERIPHERALS_PINS_H__
+#define __MICROPY_INCLUDED_NRF_PERIPHERALS_PINS_H__
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "nrf_gpio.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    qstr name;
+    // These could be squeezed to fewer bits if more fields are needed.
+    uint8_t number;      // port << 5 | pin number in port (0-31): 6 bits needed
+    uint8_t adc_channel; // 0 is no ADC, ADC channel from 1 to 8:
+                         // 4 bits needed here; 5 bits used in periph registers
+} mcu_pin_obj_t;
+
+extern const mp_obj_type_t mcu_pin_type;
+
+// Used in device-specific pins.c
+#define PIN(p_name, p_port, p_pin, p_adc_channel)       \
+{ \
+    { &mcu_pin_type }, \
+    .name = MP_QSTR_ ## p_name, \
+    .number = NRF_GPIO_PIN_MAP(p_port, p_pin),      \
+    .adc_channel = (p_adc_channel), \
+}
+
+// Choose based on chip, but not specifically revision (e.g., not NRF52832_XXAA)
+#ifdef NRF52832
+#include "nrf52832/pins.h"
+#endif
+
+#ifdef NRF52840
+#include "nrf52840/pins.h"
+#endif
+
+//**************extern const mp_obj_type_t mcu_pin_type;
+
+#endif // __MICROPY_INCLUDED_NRF_PERIPHERALS_PINS_H__
diff --git a/ports/nrf/supervisor/serial.c b/ports/nrf/supervisor/serial.c
index a822dc9936..da7fe07fd3 100644
--- a/ports/nrf/supervisor/serial.c
+++ b/ports/nrf/supervisor/serial.c
@@ -30,7 +30,6 @@
 #include "ble_uart.h"
 #else
 #include "nrf_gpio.h"
-#include "nrf_pin.h"
 #endif
 
 #if !defined( NRF52840_XXAA) || ( defined(CFG_HWUART_FOR_SERIAL) && CFG_HWUART_FOR_SERIAL == 1 )