nRF52 DK

Overview

The nRF52 Development Kit (PCA10040) hardware provides support for the Nordic Semiconductor nRF52832 ARM Cortex-M4F CPU and the following devices:

ADC
CLOCK
FLASH
GPIO
I2C
MPU
NVIC
PWM
RADIO (Bluetooth Low Energy)
RTC
Segger RTT (RTT Console)
SPI
UART
WDT

More information about the board can be found at the nRF52 DK website [1]. The Nordic Semiconductor Infocenter [2] contains the processor’s information and the datasheet.

Hardware

nRF52 DK has two external oscillators. The frequency of the slow clock is 32.768 kHz. The frequency of the main clock is 32 MHz.

Supported Features

The nrf52dk_nrf52832 board configuration supports the following hardware features:

Interface	Controller	Driver/Component
ADC	on-chip	adc
CLOCK	on-chip	clock_control
FLASH	on-chip	flash
GPIO	on-chip	gpio
I2C(M)	on-chip	i2c
MPU	on-chip	arch/arm
NVIC	on-chip	arch/arm
PWM	on-chip	pwm
RADIO	on-chip	Bluetooth
RTC	on-chip	system clock
RTT	Segger	console
SPI(M/S)	on-chip	spi
UART	on-chip	serial
WDT	on-chip	watchdog

Other hardware features have not been enabled yet for this board. See nRF52 DK website [1] and Nordic Semiconductor Infocenter [2] for a complete list of nRF52 Development Kit board hardware features.

Connections and IOs

LED

LED1 (green) = P0.17
LED2 (green) = P0.18
LED3 (green) = P0.19
LED4 (green) = P0.20
LD5 (red/green) = OB LED 1/2

Push buttons

BUTTON1 = SW1 = P0.13
BUTTON2 = SW2 = P0.14
BUTTON3 = SW3 = P0.15
BUTTON4 = SW4 = P0.16
BOOT = SW5 = boot/reset

External Connectors

J-Link Prog Connector

PIN #	Signal Name
1	VDD
2	IMCU_TMSS
3	GND
4	IMCU_TCKS
5	V5V
6	IMCU_TDOS
7	Cut off
8	IMCU_TDIS
9	Cut off
10	IMCU_RESET

Debug IN

PIN #	Signal Name	NRF52832 Functions
1	VDD	N/A
2	SWDIO	SWDIO
3	GND	N/A
4	SWDCLK	SWDCLK
5	GND	N/A
6	P0.18	P0.18 / TRACEDATA[0] / SWO
7	Cut off	N/A
8	Cut off	N/A
9	GND	N/A
10	P0.21	P0.21 / RESET

Debug OUT

PIN #	Signal Name
1	EXT_VTG
2	EXT_SWDIO
3	GND
4	EXT_SWDCLK
5	GND
6	EXT_SWO
7	Cut off
8	Cut off
9	EXT_GND_DETECT
10	EXT_RESET

Shield Debug and Current measurement

PIN #	Signal Name
1	VDD_nRF
2	VDD
3	SH_VTG
4	SH_SWDIO
5	SH_SWDCLK
6	SH_SWO
7	SH_RESET
8	SH_GND_DETECT

Auxiliary

PIN #	Signal Name	NRF52832 Functions
1	P0.00	P0.00 / XL1
2	P0.01	P0.01 / XL2
3	P0.21	P0.21 / RESET
4	P0.05_C	P0.05 / AIN3
5	P0.06_C	P0.06
6	P0.07_C	P0.07
7	P0.08_C	P0.08
8	P0.09	P0.09 / NFC1
9	P0.10	P0.10 / NFC2

Arduino Headers

P1/P7 Power

PIN #	Signal Name	NRF52832 Functions
1	VDD	N/A
2	VDD	N/A
3	RESET	P0.21 / RESET
4	VDD	N/A
5	V5V	N/A
6	GND	N/A
7	GND	N/A
8	VIN	N/A

P2/P8 Analog in

PIN #	Signal Name	NRF52832 Functions
1	A0	P0.03 / AIN1
2	A1	P0.04 / AIN2
3	A2	P0.28 / AIN4
4	A3	P0.29 / AIN5
5	A4	P0.30 / AIN6
6	A5	P0.31 / AIN7

P3/P9 Digital I/O

PIN #	Signal Name	NRF52832 Functions
1	D0 (RX)	P0.11
2	D1 (TX)	P0.12
3	D2	P0.13
4	D3	P0.14 / TRACEDATA[3]
5	D4	P0.15 / TRACEDATA[2]
6	D5	P0.16 / TRACEDATA[1]
7	D6	P0.17
8	D7	P0.18 / TRACEDATA[3] / SWO

P4/P10 Digital I/O

PIN #	Signal Name	NRF52832 Functions
1	D8	P0.19
2	D9	P0.20 / TRACECLK
3	D10 (SS)	P0.22
4	D11 (MOSI)	P0.23
5	D12 (MISO)	P0.24
6	D13 (SCK)	P0.25
7	GND	N/A
8	AREF	P0.02 / AIN0
9	SDA	P0.26
10	SCL	P0.27

P5/P11

PIN #	Signal Name	NRF52832 Functions
1	D12 (MISO)	P0.24
2	V5V	N/A
3	D13 (SCK)	P0.25
4	D11 (MOSI)	P0.23
5	RESET	N/A
6	N/A	N/A

Programming and Debugging

Flashing

Follow the instructions in the Nordic nRF5x Segger J-Link page to install and configure all the necessary software. Further information can be found in Flashing. Then build and flash applications as usual (see Building an Application and Run an Application for more details).

Here is an example for the Hello World application.

First, run your favorite terminal program to listen for output.

$ minicom -D <tty_device> -b 115200

Replace <tty_device> with the port where the board nRF52 DK can be found. For example, under Linux, /dev/ttyACM0.

Then build and flash the application in the usual way.

# From the root of the zephyr repository
west build -b nrf52dk_nrf52832 samples/hello_world
west flash

Debugging

Refer to the Nordic nRF5x Segger J-Link page to learn about debugging Nordic boards with a Segger IC.

Testing the LEDs and buttons in the nRF52 DK

There are 2 samples that allow you to test that the buttons (switches) and LEDs on the board are working properly with Zephyr:

samples/basic/blinky
samples/basic/button

You can build and flash the examples to make sure Zephyr is running correctly on your board. The button and LED definitions can be found in boards/arm/nrf52dk_nrf52832/nrf52dk_nrf52832.dts.