.. zephyr:board:: contextualelectronics_abc

Overview

The Contextual Electronics ABC (PCA10056) hardware provides support for the Nordic Semiconductor nRF52840 ARM Cortex-M4F CPU and the following devices:

CLOCK
FLASH
:abbr:GPIO (General Purpose Input Output)
:abbr:I2C (Inter-Integrated Circuit)
:abbr:MPU (Memory Protection Unit)
:abbr:NVIC (Nested Vectored Interrupt Controller)
:abbr:PWM (Pulse Width Modulation)
Segger RTT (RTT Console)
:abbr:SPI (Serial Peripheral Interface)
:abbr:UART (Universal asynchronous receiver-transmitter)
Quectel BG95 Modem

More information about the board can be found at the ABC Board website. The Nordic Semiconductor Infocenter contains the processor's information and the datasheet.

Hardware

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

nRF52840 ARM Cortex-M4F processor at 64 MHz
1 MB flash memory and 256 KB of SRAM
SWD connector

Supported Features

.. zephyr:board-supported-hw::

See ABC Board website_ for more details on this board, and Nordic Semiconductor Infocenter_ for a complete list of SoC features.

Programming and Debugging

.. zephyr:board-supported-runners::

Applications for the contextualelectronics_abc board configuration can be built and flashed in the usual way (see :ref:build_an_application and :ref:application_run for more details).

Flashing

Flashing Zephyr onto the contextualelectronics_abc board requires an external programmer. The programmer is attached to the SWD header.

Build the Zephyr kernel and the :zephyr:code-sample:hello_world sample application.

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: contextualelectronics_abc :goals: build :compact:

Flash the image.

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: contextualelectronics_abc :goals: flash :compact:

To see the output, run your favorite terminal program.

.. code-block:: console

$ minicom -D <tty_device> -b 115200

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

Debugging

Refer to the :ref:nordic_segger page to learn about debugging Nordic boards with a Segger IC.

Selecting the pins

Pins can be configured in the board pinctrl file. To see the available mappings, open the nRF52840 Product Specification_, chapter 7 'Hardware and Layout'. In the table 7.1.1 'aQFN73 ball assignments' select the pins marked 'General purpose I/O'. Note that pins marked as 'low frequency I/O only' can only be used in under-10KHz applications. They are not suitable for 115200 speed of UART.

References

.. target-notes::

.. _ABC Board website: https://contextualelectronics.com/courses/advanced-ble-cell-abc-board/ .. _Nordic Semiconductor Infocenter: https://infocenter.nordicsemi.com .. _J-Link Software and documentation pack: https://www.segger.com/jlink-software.html .. _nRF52840 Product Specification: http://infocenter.nordicsemi.com/pdf/nRF52840_PS_v1.0.pdf