.. zephyr:board:: croxel_cx1825

Overview

Croxel's CX1825 Bluetooth Prototyping board_ provides support for the Nordic Semiconductor nRF52840 ARM Cortex-M4F CPU and the following devices:

:abbr:ADC (Analog to Digital Converter)
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)
RADIO (Bluetooth Low Energy and 802.15.4)
:abbr:RTC (nRF RTC System Clock)
Segger RTT (RTT Console)
:abbr:SPI (Serial Peripheral Interface)
:abbr:USB (Universal Serial Bus)
:abbr:WDT (Watchdog Timer)

Hardware

Ezurio's BL654 (nRF52840 ARM Cortex-M4F processor at 64MHz)
1 MB flash memory and 256 KB of SRAM
Coin-cell retainer for Lithium coincell batteries
2 Discrete LEDs (Red and Green)
User Button
Reset Button
Accelerometer (LIS3DH)
Ambient & RGB Light and Proximity Sensor (APDS9960)
Temperature and Humidity Sensor (HTS221)
Barometric Pressure sensor (LPS22H)
Hall Effect Switch (MLX90248)
RGB LED with Charge-Pump driver (LP5521)
Digital Microphone
Beeper
QWIIC connector supporting expansion for I2C devices
USB Connector for data and power
16-pin Expansion connector
SWD Connector

Supported Features

.. zephyr:board-supported-hw::

Future Feature Support

RGB LED (Charge-Pump driver not implemented)
Microphone

Connections and IOs

Croxel's CX1825 Bluetooth Prototyping board has detailed information about the board (schematic_)

LEDs

LED1 (red) = P0.8
LED2 (green) = P0.12

Digital Inputs

User Button = P1.16
Reset Button = P0.18
Hall-Effect Switch = P0.15

Programming and Debugging

.. zephyr:board-supported-runners::

Applications for the croxel_cx1825/nrf52840 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 croxel_cx1825_nrf52840 board requires an external programmer. The programmer is attached to the SWD header.

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

.. zephyr-app-commands:: :zephyr-app: samples/basic/blinky :board: croxel_cx1825/nrf52840 :goals: build :compact:

Flash the image.

.. zephyr-app-commands:: :zephyr-app: samples/basic/blinky :board: croxel_cx1825/nrf52840 :goals: flash :compact:

You should see the red LED blink.

References

.. target-notes::

.. _CX1825 Bluetooth Prototyping board: https://croxel.com/ble

.. _schematic: https://croxeldata.s3.amazonaws.com/cx1825/CX1825-01_SCH_200424A.PDF