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217 lines
5.6 KiB
217 lines
5.6 KiB
.. zephyr:board:: adafruit_feather_nrf52840 |
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Overview |
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The Adafruit Feather nRF52840 provides support for the Nordic Semiconductor |
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nRF52840 ARM Cortex-M4F CPU and the following devices: |
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* :abbr:`ADC (Analog to Digital Converter)` |
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* CLOCK |
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* FLASH |
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* :abbr:`GPIO (General Purpose Input Output)` |
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* :abbr:`I2C (Inter-Integrated Circuit)` |
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* :abbr:`MPU (Memory Protection Unit)` |
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* :abbr:`NVIC (Nested Vectored Interrupt Controller)` |
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* :abbr:`PWM (Pulse Width Modulation)` |
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* RADIO (Bluetooth Low Energy and 802.15.4) |
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* :abbr:`RTC (nRF RTC System Clock)` |
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* Segger RTT (RTT Console) |
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* :abbr:`SPI (Serial Peripheral Interface)` |
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* :abbr:`UART (Universal asynchronous receiver-transmitter)` |
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* :abbr:`USB (Universal Serial Bus)` |
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* :abbr:`WDT (Watchdog Timer)` |
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.. tabs:: |
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.. group-tab:: Express |
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.. figure:: img/adafruit_feather_nrf52840_express.jpg |
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:align: center |
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:alt: Adafruit Feather nRF52840 Express |
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.. group-tab:: Sense |
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.. figure:: img/adafruit_feather_nrf52840_sense.jpg |
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:align: center |
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:alt: Adafruit Feather nRF52840 Sense |
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Hardware |
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- nRF52840 ARM Cortex-M4F processor at 64 MHz |
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- 1 MB flash memory and 256 KB of SRAM |
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- Battery connector and charger for 3.7 V lithium polymer batteries |
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- Charging indicator LED |
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- 2 User LEDs |
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- 1 NeoPixel LED |
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- Reset button |
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- SWD connector (Express only) |
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- SWD solder pads on bottom of PCB (Sense only) |
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- LSM6DS33 Accel/Gyro (Sense only) |
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- LIS3MDL magnetometer (Sense only) |
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- APDS9960 Proximity, Light, Color, and Gesture Sensor (Sense only) |
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- MP34DT01-M PDM Microphone sound sensor (Sense only) |
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- SHT3X Humidity sensor (Sense only) |
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- BMP280 temperature and barometric pressure/altitude (Sense only) |
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Supported Features |
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================== |
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.. zephyr:board-supported-hw:: |
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Connections and IOs |
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=================== |
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.. tabs:: |
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.. group-tab:: Express |
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The `Adafruit Feather nRF52840 Express Learn site`_ has |
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detailed information about the board including |
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`pinouts (Express)`_ and the `schematic (Express)`_. |
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.. group-tab:: Sense |
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The `Adafruit Feather nRF52840 Sense Learn site`_ has |
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detailed information about the board including |
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`pinouts (Sense)`_ and the `schematic (Sense)`_. |
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LED |
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--- |
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* LED0 (red) = P1.15 (Express) |
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* LED0 (red) = P1.9 (Sense) |
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* LED1 (blue) = P1.10 |
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Push buttons |
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------------ |
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* SWITCH = P1.02 |
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* RESET = P0.18 |
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Programming and Debugging |
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************************* |
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.. zephyr:board-supported-runners:: |
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Flashing |
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======== |
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Flashing Zephyr onto both the Feather nRF52840 Express and Sense is possible |
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using the SWD headers. Only the Express board has an SWD connector however. |
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Both the Feather nRF52840 Express and Sense ship with the `Adafruit nRF52 Bootloader`_ |
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which supports flashing using `UF2`_. This allows easy flashing of new images, |
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but does not support debugging the device. |
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#. Build the Zephyr kernel and the :zephyr:code-sample:`blinky` sample application. |
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.. tabs:: |
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.. group-tab:: Express |
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.. zephyr-app-commands:: |
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:zephyr-app: samples/basic/blinky |
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:board: adafruit_feather_nrf52840 |
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:goals: build |
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:compact: |
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.. group-tab:: Express UF2 |
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.. zephyr-app-commands:: |
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:zephyr-app: samples/basic/blinky |
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:board: adafruit_feather_nrf52840/nrf52840/uf2 |
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:goals: build |
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:compact: |
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.. group-tab:: Sense |
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.. zephyr-app-commands:: |
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:zephyr-app: samples/basic/blinky |
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:board: adafruit_feather_nrf52840/nrf52840/sense |
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:goals: build |
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:compact: |
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.. group-tab:: Sense UF2 |
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.. zephyr-app-commands:: |
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:zephyr-app: samples/basic/blinky |
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:board: adafruit_feather_nrf52840/nrf52840/sense/uf2 |
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:goals: build |
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:compact: |
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#. If using UF2, connect the board to your host computer using USB. |
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#. Tap the reset button twice quickly to enter bootloader mode. |
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A mass storage device named ``FTHR840BOOT`` for (Express) or |
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``FTHRSNSBOOT`` (Sense) should appear on the host. Ensure this is |
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mounted. |
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#. Flash the image. |
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.. tabs:: |
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.. group-tab:: Express |
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.. zephyr-app-commands:: |
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:zephyr-app: samples/basic/blinky |
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:board: adafruit_feather_nrf52840 |
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:goals: flash |
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:compact: |
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.. group-tab:: Express UF2 |
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.. zephyr-app-commands:: |
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:zephyr-app: samples/basic/blinky |
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:board: adafruit_feather_nrf52840/nrf52840/uf2 |
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:goals: flash |
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:compact: |
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.. group-tab:: Sense |
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.. zephyr-app-commands:: |
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:zephyr-app: samples/basic/blinky |
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:board: adafruit_feather_nrf52840/nrf52840/sense |
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:goals: flash |
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:compact: |
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.. group-tab:: Sense UF2 |
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.. zephyr-app-commands:: |
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:zephyr-app: samples/basic/blinky |
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:board: adafruit_feather_nrf52840/nrf52840/sense/uf2 |
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:goals: flash |
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:compact: |
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#. You should see the red LED blink. |
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References |
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********** |
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.. target-notes:: |
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.. _Adafruit Feather nRF52840 Express Learn site: |
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https://learn.adafruit.com/introducing-the-adafruit-nrf52840-feather/ |
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.. _pinouts (Express): |
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https://learn.adafruit.com/introducing-the-adafruit-nrf52840-feather/pinouts |
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.. _schematic (Express): |
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https://learn.adafruit.com/introducing-the-adafruit-nrf52840-feather/downloads |
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.. _Adafruit Feather nRF52840 Sense Learn site: |
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https://learn.adafruit.com/adafruit-feather-sense |
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.. _pinouts (Sense): |
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https://learn.adafruit.com/adafruit-feather-sense/pinouts |
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.. _schematic (Sense): |
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https://learn.adafruit.com/adafruit-feather-sense/downloads |
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.. _Adafruit nRF52 Bootloader: |
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https://github.com/adafruit/Adafruit_nRF52_Bootloader |
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.. _UF2: |
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https://github.com/microsoft/uf2
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