nRF52840-DK

The NRF52840-DK (PCA10056) is a development board for the nRF52840 SoC from Nordic.

Serial Console

The PCA10056 default console is the UART0.

The PCA10056 does not have RS-232 drivers or serial connectors on board. UART0 is connected to the virtual COM port:

Signal

PIN

UART0-RX

P0.08

UART0-TX

P0.06

LEDs and Buttons

LEDs

The PCA10056 has 4 user-controllable LEDs:

LED

MCU

LED1

P0.13

LED2

P0.14

LED3

P0.15

LED4

P0.26

A low output illuminates the LED.

Pushbuttons

BUTTON

MCU

BUTTON1

P0.11

BUTTON2

P0.12

BUTTON3

P0.24

BUTTON4

P0.25

Configurations

Each configuration is maintained in a sub-directory and can be selected as follow:

tools/configure.sh nrf52840-dk:<subdir>

Where <subdir> is one of the following:

adc

This configuration shows the use of the ADC peripheral.

buttons

This configuration shows the use of the buttons subsystem.

cdcacm

NuttShell configuration with support for CDC/ACM USB device driver.

composite

NuttShell configuration with support for CDC/ACM with RNDIS composite driver.

highpri

This application demonstrates high priority interrupt feature of the NuttX.

nsh

Basic NuttShell configuration (console enabled in UART0, exposed via J-Link VCOM connection, at 115200 bps).

ostest_tickless

This is a NSH configuration that includes apps/testing/ostest as a builtin and enable support for the tick-less OS.

pwm

This configuration shows the use of the PWM peripheral.

qspi

NuttShell configuration with enabled support for on-board MX25R QSPI memory.

rndis

NuttShell configuration with support for RNDIS USB device driver.

sdc

Enables Nordic’s SoftDevice controller and uses NuttX BLE stack for the host-layer. The btsak application is included as a builtin.

sdc_nimble

Enables Nordic’s SoftDevice controller and uses nimBLE for the host-layer. The nimble test application can be used to enable a simple GATT server.

sx127x

NuttShell configuration with support for sx127x chip.

timer

This configuration shows the use of the TIMER peripheral.

usbnsh

Basic NuttShell configuration (CDCACM console enabled in USB Port, at 115200 bps).