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167 lines
5.4 KiB
167 lines
5.4 KiB
.. _adafruit_feather_m0_basic_proto: |
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Adafruit Feather M0 Basic Proto |
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############################### |
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Overview |
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******** |
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The Adafruit Feather M0 Basic Proto is a thin, light ARM development |
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board with an onboard battery connector and charger for 3.7 V lithium |
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polymer batteries, charging status indicator and user LEDs, native USB |
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connector, 20 I/O pins, and a small prototyping area. |
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.. image:: img/adafruit_feather_m0_basic_proto.jpg |
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:align: center |
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:alt: Adafruit Feather M0 Basic Proto |
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Hardware |
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******** |
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- ATSAMD21G18A ARM Cortex-M0+ processor at 48 MHz |
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- 32.768 kHz crystal oscillator |
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- 256 KiB flash memory and 32 KiB of RAM |
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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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- 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 adafruit_feather_m0_basic_proto 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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| USART | on-chip | Serial port | |
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+-----------+------------+------------------------------------------+ |
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| I2C | on-chip | Inter-Integrated Circuit | |
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+-----------+------------+------------------------------------------+ |
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| SPI | on-chip | Serial Peripheral Interface port | |
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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/adafruit/feather_m0_basic_proto/adafruit_feather_m0_basic_proto_defconfig`. |
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Connections and IOs |
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=================== |
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The `Adafruit Feather M0 Basic Proto Learn site`_ has detailed |
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information about the board 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 32.768 kHz external oscillator |
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with the on-chip PLL generating the 48 MHz system clock. |
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Serial Port |
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=========== |
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The SAMD21 MCU has 6 SERCOM based USARTs. On the Adafruit Feather M0 |
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Basic Proto, SERCOM0 is the Zephyr console and is available on pins 0 |
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(RX) and 1 (TX). |
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I2C Port |
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======== |
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The SAMD21 MCU has 6 SERCOM based USARTs. On the Adafruit Feather M0 |
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Basic Proto, SERCOM3 is available on pin 20 (SDA) and pin 21 (SCL). |
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SPI Port |
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======== |
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The SAMD21 MCU has 6 SERCOM based SPIs. On the Adafruit Feather M0 |
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Basic Proto, SERCOM4 is available on pin 22 (MISO), pin 23 (MOSI), and |
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pin 24 (SCK). |
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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 :zephyr:code-sample-category:`usb` sample applications for |
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more, such as the :zephyr:code-sample:`usb-cdc-acm` sample which sets up a virtual |
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serial port that echos characters back to the host PC. |
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Programming and Debugging |
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************************* |
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The Adafruit Feather M0 Basic Proto ships with a BOSSA compatible |
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SAM-BA bootloader. The bootloader can be entered by quickly tapping |
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the reset button twice. |
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Flashing |
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======== |
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#. Build the Zephyr kernel and the :zephyr:code-sample:`hello_world` sample application: |
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.. zephyr-app-commands:: |
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:zephyr-app: samples/hello_world |
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:board: adafruit_feather_m0_basic_proto |
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:goals: build |
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:compact: |
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#. Connect the Adafruit Feather M0 Basic Proto to your host computer |
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using USB |
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#. Connect a 3.3 V USB to serial adapter to the board and to the |
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host. See the `Serial Port`_ section above for the board's pin |
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connections. |
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#. Run your favorite terminal program to listen for output. Under Linux the |
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terminal should be :code:`/dev/ttyACM0`. For example: |
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.. code-block:: console |
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$ minicom -D /dev/ttyACM0 -o |
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The -o option tells minicom not to send the modem initialization |
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string. Connection should be configured as follows: |
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- Speed: 115200 |
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- Data: 8 bits |
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- Parity: None |
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- Stop bits: 1 |
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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/hello_world |
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:board: adafruit_feather_m0_basic_proto |
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:goals: flash |
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:compact: |
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You should see "Hello World! adafruit_feather_m0_basic_proto" in your terminal. |
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References |
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********** |
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.. target-notes:: |
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.. _Adafruit Feather M0 Basic Proto Learn site: |
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https://learn.adafruit.com/adafruit-feather-m0-basic-proto/ |
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.. _pinouts: |
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https://learn.adafruit.com/adafruit-feather-m0-basic-proto/pinouts |
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.. _schematic: |
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https://learn.adafruit.com/adafruit-feather-m0-basic-proto/downloads
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