| .. _croxel_cx1825_nrf52840: |
| |
| CX1825 nRF52840 |
| ############### |
| |
| 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)` |
| |
| .. figure:: img/cx1825_nrf52840.jpg |
| :align: center |
| :alt: CX1825 |
| |
| Croxel's CX1825 Bluetooth Prototyping board (Credit: Croxel) |
| |
| 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 |
| ================== |
| |
| - Discrete LEDs (red and green) |
| - Buttons (User and Reset) |
| - Sensors (Accelerometer, Light, Temperature and Humidity, Pressure and Hall-Effect sensors) |
| - Beeper |
| - Radio (Bluetooth, IEEE 802.15.4) |
| - SOC peripherals (ADC, Clock, Flash, GPIO, I2C, MPU, NVIC, PWM, Radio, RTC, SPI, USB, WDT) |
| |
| 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 |
| ************************* |
| |
| 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 |
