127 lines
3.8 KiB
ReStructuredText
127 lines
3.8 KiB
ReStructuredText
.. _serpente:
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Arturo182 Serpente
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##################
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Overview
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********
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The Serpente is a very small low-cost development and prototyping
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board equipped with 4MiB flash storage, a PWM enabled RGB led and 6 I/O pins.
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The board comes with 3 different USB connector options: USB Type-C plug,
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USB Type-C socket and USB Type-A plug.
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.. image:: img/serpente.jpg
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:width: 640px
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:align: center
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:alt: Serpente Boards
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Hardware
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********
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- ATSAMD21E18A ARM Cortex-M0+ processor at 48 MHz
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- 256 KiB flash memory and 32 KiB of RAM
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- Extra 4MiB SPI flash memory
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- RGB User LED
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- Reset button
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- Native USB port
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Supported Features
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==================
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The Serpente 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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| NVIC | on-chip | nested vector interrupt controller |
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+-----------+------------+------------------------------------------+
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| Flash | on-chip | Can be used with LittleFS to store files |
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+-----------+------------+------------------------------------------+
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| SYSTICK | on-chip | systick |
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+-----------+------------+------------------------------------------+
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| WDT | on-chip | Watchdog |
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+-----------+------------+------------------------------------------+
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| GPIO | on-chip | I/O ports |
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+-----------+------------+------------------------------------------+
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| PWM | on-chip | Pulse Width Modulation |
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+-----------+------------+------------------------------------------+
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| USART | on-chip | Serial ports |
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+-----------+------------+------------------------------------------+
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| SPI | on-chip | Serial Peripheral Interface ports |
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+-----------+------------+------------------------------------------+
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| USB | on-chip | USB device |
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+-----------+------------+------------------------------------------+
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Other hardware features are not currently supported by Zephyr.
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The default configuration can be found in the Kconfig file
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:zephyr_file:`boards/arm/serpente/serpente_defconfig`.
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Connections and IOs
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===================
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The `Serpente documentation`_ has detailed information about the board
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including `pinouts`_ and the `schematic`_.
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System Clock
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============
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The SAMD21 MCU is configured to use the 8MHz internal oscillator
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with the on-chip PLL generating the 48 MHz system clock.
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USB Device Port
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===============
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The SAMD21 MCU has a USB device port that can be used to communicate
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with a host PC. See the :ref:`usb-samples` sample applications for
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more, such as the :ref:`usb_cdc-acm` sample which prints "Hello World!"
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to the host PC.
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Programming and Debugging
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=========================
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The Serpente ships the BOSSA compatible UF2 bootloader. The bootloader
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can be entered by quickly tapping the reset button twice.
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Flashing
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========
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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/basic/blinky
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:board: serpente
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:goals: build
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:compact:
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#. Connect the Serpente to your host computer using USB
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#. Tap the reset button twice quickly to enter bootloader mode
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#. Flash the image:
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.. zephyr-app-commands::
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:zephyr-app: samples/basic/blinky
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:board: serpente
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:goals: flash
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:compact:
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You should see the User LED blink.
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References
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**********
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.. target-notes::
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.. _Serpente documentation:
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https://serpente.solder.party/r2/
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.. _pinouts:
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https://serpente.solder.party/r2/docs/pinout/
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.. _schematic:
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https://serpente.solder.party/r2/docs/downloads/
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