nRF51 DK
Overview
The nRF51 Development Kit (PCA10028) hardware provides support for the Nordic Semiconductor nRF51422 ARM Cortex-M0 CPU and the following devices:
ADC
CLOCK
FLASH
GPIO
I2C
NVIC
RADIO (Bluetooth Low Energy)
RTC
Segger RTT (RTT Console)
SPI
UART
WDT
Fig. 109 nRF51 DK (Credit: Nordic Semiconductor)
More information about the board can be found at the nRF51 DK website 1. The Nordic Semiconductor Infocenter 2 contains the processor’s information and the datasheet.
Hardware
nRF51 DK has two external oscillators. The frequency of the slow clock is 32.768 kHz. The frequency of the main clock is 16 MHz.
Supported Features
The nrf51dk_nrf51422 board configuration supports the following nRF51 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 |
NVIC |
on-chip |
arch/arm |
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 nRF51 DK website 1 and Nordic Semiconductor Infocenter 2 for a complete list of nRF51 Development Kit board hardware features.
Connections and IOs
LED
LED1 (green) = P0.21
LED2 (green) = P0.22
LED3 (green) = P0.23
LED4 (green) = P0.24
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 nRF51 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 nrf51dk_nrf51422 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.