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171 lines
5.6 KiB
171 lines
5.6 KiB
.. _arduino_nano_33_iot: |
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Arduino Nano 33 IOT |
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################### |
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Overview |
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******** |
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The Arduino Nano 33 IOT is a small form factor development board with USB, |
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Wifi, Bluetooth, a 6 axis IMU, and secure element. |
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.. image:: img/nano_33_iot.jpg |
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:align: center |
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:alt: Arduino Nano 33 IOT |
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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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- 256 KiB flash memory and 32 KiB of RAM |
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- One user LED |
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- One reset button |
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- Native USB port |
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- Wifi and Bluetooth via a u-blox NINA-W102 |
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- ATECC608A secure element |
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- LSM6DS3 six axis accelerometer and gyro |
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Supported Features |
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================== |
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The arduino_nano_33_iot board configuration supports the following hardware |
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features: |
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+-----------+------------+------------------------------------------+ |
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| Interface | Controller | Driver/Component | |
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+===========+============+==========================================+ |
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| ADC | on-chip | Analog to digital converter | |
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+-----------+------------+------------------------------------------+ |
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| COUNTER | on-chip | Pulse counter | |
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+-----------+------------+------------------------------------------+ |
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| DMA | on-chip | Direct memory access unit | |
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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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| GPIO | on-chip | I/O ports | |
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+-----------+------------+------------------------------------------+ |
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| HWINFO | on-chip | Hardware info and serial number | |
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+-----------+------------+------------------------------------------+ |
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| NVIC | on-chip | nested vector interrupt controller | |
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+-----------+------------+------------------------------------------+ |
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| PWM | on-chip | Pulse Width Modulation | |
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+-----------+------------+------------------------------------------+ |
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| SPI | on-chip | Serial Peripheral Interface ports | |
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+-----------+------------+------------------------------------------+ |
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| SYSTICK | on-chip | systick | |
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+-----------+------------+------------------------------------------+ |
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| USART | on-chip | Serial ports | |
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+-----------+------------+------------------------------------------+ |
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| USB | on-chip | USB device | |
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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 currently supported by Zephyr. |
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The default configuration can be found in the Kconfig |
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:zephyr_file:`boards/arduino/nano_33_iot/arduino_nano_33_iot_defconfig`. |
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Connections and IOs |
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=================== |
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The `Arduino store`_ has detailed information about board |
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connections. Download the `schematic`_ for more detail. |
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System Clock |
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============ |
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The SAMD21 MCU is configured to use the 8 MHz internal oscillator |
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with the on-chip PLL generating the 48 MHz system clock. The internal |
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APB and GCLK unit are set up in the same way as the upstream Arduino |
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libraries. |
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Serial Port |
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=========== |
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The SAMD21 MCU has 6 SERCOM based USARTs. SERCOM5 is available on pins 1 and 2. |
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PWM |
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=== |
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The SAMD21 MCU has 3 TCC based PWM units with up to 4 outputs each and a period |
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of 24 bits or 16 bits. If :code:`CONFIG_PWM_SAM0_TCC` is enabled then LED0 is |
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driven by TCC2 instead of by GPIO. |
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SPI Port |
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======== |
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The SAMD21 MCU has 6 SERCOM based SPIs. SERCOM1 is available on pins 1, 14, |
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and 15. |
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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 Nano 33 IOT ships the BOSSA compatible UF2 bootloader. The |
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bootloader can be entered by quickly tapping the reset button twice. |
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Additionally, if :code:`CONFIG_USB_CDC_ACM` is enabled then the bootloader |
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will be entered automatically when you run :code:`west flash`. |
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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: arduino_nano_33_iot |
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:goals: build |
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:compact: |
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#. Connect the Nano 33 IOT to your host computer 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: arduino_nano_33_iot |
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:goals: flash |
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:compact: |
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You should see "Hello World! arduino_nano_33_iot" in your terminal. |
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References |
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********** |
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.. target-notes:: |
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.. _Arduino Store: |
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https://store.arduino.cc/arduino-nano-33-iot |
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.. _schematic: |
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https://content.arduino.cc/assets/NANO33IoTV2.0_sch.pdf
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