148 lines
4.4 KiB
ReStructuredText
148 lines
4.4 KiB
ReStructuredText
.. _adafruit_feather_nrf52840:
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Adafruit Feather nRF52840 Express
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#################################
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Overview
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********
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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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.. figure:: img/adafruit_feather_nrf52840.jpg
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:width: 640px
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:align: center
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:alt: Adafruit Feather nRF52840 Express
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Hardware
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********
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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
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Supported Features
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==================
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The Adafruit Feather nRF52840 board configuration supports the
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following hardware features:
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+-----------+------------+----------------------+
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| Interface | Controller | Driver/Component |
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+===========+============+======================+
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| ADC | on-chip | adc |
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+-----------+------------+----------------------+
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| CLOCK | on-chip | clock_control |
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+-----------+------------+----------------------+
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| FLASH | on-chip | flash |
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+-----------+------------+----------------------+
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| GPIO | on-chip | gpio |
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+-----------+------------+----------------------+
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| I2C | on-chip | i2c |
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+-----------+------------+----------------------+
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| MPU | on-chip | arch/arm |
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+-----------+------------+----------------------+
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| NVIC | on-chip | arch/arm |
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+-----------+------------+----------------------+
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| PWM | on-chip | pwm |
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+-----------+------------+----------------------+
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| RADIO | on-chip | Bluetooth, |
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| | | ieee802154 |
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+-----------+------------+----------------------+
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| RTC | on-chip | system clock |
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+-----------+------------+----------------------+
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| SPI | on-chip | spi |
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+-----------+------------+----------------------+
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| UART | on-chip | serial |
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+-----------+------------+----------------------+
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| USB | on-chip | usb |
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+-----------+------------+----------------------+
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| WDT | on-chip | watchdog |
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+-----------+------------+----------------------+
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Other hardware features are not supported by the Zephyr kernel.
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Connections and IOs
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===================
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The `Adafruit Feather nRF52840 Express Learn site`_ has detailed
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information about the board including `pinouts`_ and the `schematic`_.
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LED
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---
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* LED0 (red) = P1.15
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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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Applications for the ``adafruit_feather_nrf52840`` board configuration
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can be built and flashed in the usual way (see :ref:`build_an_application`
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and :ref:`application_run` for more details).
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Flashing
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========
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Flashing Zephyr onto the ``adafruit_feather_nrf52480`` board requires
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an external programmer. The programmer is attached to the SWD header.
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Build the Zephyr kernel and the :ref:`blinky-sample` sample application.
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.. zephyr-app-commands::
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:zephyr-app: samples/blinky
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:board: adafruit_feather_nrf52840
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:goals: build
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:compact:
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Flash the image.
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.. zephyr-app-commands::
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:zephyr-app: samples/blinky
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:board: adafruit_feather_nrf52840
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:goals: flash
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:compact:
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You should see the 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:
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https://learn.adafruit.com/introducing-the-adafruit-nrf52840-feather/pinouts
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.. _schematic:
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https://learn.adafruit.com/introducing-the-adafruit-nrf52840-feather/downloads
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