nRF52-PCA10040

Overview

Zephyr applications use the nrf52_pca10040 board configuration to run on the nRF52 Development Kit (PCA10040) hardware. It 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 and 802.15.4)
  • RTC
  • Segger RTT (RTT Console)
  • SPI
  • UART
  • WDT
nRF52 PCA10040 DK

nRF52 PCA10040 DK (Credit: Nordic Semi)

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 nrf52_pca10040 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 are not supported by the Zephyr kernel. 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 Build 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.

# On Linux/macOS
cd $ZEPHYR_BASE/samples/hello_world
mkdir build && cd build

# On Windows
cd %ZEPHYR_BASE%\samples\hello_world
mkdir build & cd build


# Use cmake to configure a Ninja-based build system:
cmake -GNinja -DBOARD=nrf52_pca10040 ..

# Now run ninja on the generated build system:
ninja
ninja 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/nrf52_pca10040/board.h.