Advanced BLE Cell

Overview

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

  • CLOCK

  • FLASH

  • GPIO

  • I2C

  • MPU

  • NVIC

  • PWM

  • Segger RTT (RTT Console)

  • SPI

  • UART

  • Quectel BG95 Modem

More information about the board can be found at the ABC Board website [1]. The Nordic Semiconductor Infocenter [2] 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

The contextualelectronics_abc board supports the hardware features listed below.

on-chip / on-board
Feature integrated in the SoC / present on the board.
2 / 2
Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files.
vnd,foo
Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.

See ABC Board website [1] for more details on this board, and Nordic Semiconductor Infocenter [2] for a complete list of SoC features.

Programming and Debugging

The contextualelectronics_abc board supports the runners and associated west commands listed below.

flash debug

Applications for the contextualelectronics_abc board configuration can be built and flashed in the usual way (see Building an Application and Run an Application 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 Hello World sample application.

west build -b contextualelectronics_abc samples/hello_world

Flash the image.

west build -b contextualelectronics_abc samples/hello_world
west flash

To see the output, run your favorite terminal program.

$ minicom -D <tty_device> -b 115200

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

Debugging

Refer to the Nordic nRF5x Segger J-Link 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 [3], 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