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:
- NVIC
- RTC
- UART
- GPIO
- FLASH
- RADIO (Bluetooth Low Energy)
- Segger RTT (RTT Console)
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 |
|---|---|---|
| NVIC | on-chip | nested vectored interrupt controller |
| RTC | on-chip | system clock |
| UART | on-chip | serial port |
| GPIO | on-chip | gpio |
| FLASH | on-chip | flash |
| RADIO | on-chip | Bluetooth |
| RTT | on-chip | console |
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.