117 lines
3.2 KiB
ReStructuredText
117 lines
3.2 KiB
ReStructuredText
.. _esp32s2_saola:
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ESP32-S2
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########
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Overview
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********
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ESP32-S2 is a highly integrated, low-power, single-core Wi-Fi Microcontroller SoC, designed to be secure and
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cost-effective, with a high performance and a rich set of IO capabilities. [1]_
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The features include the following:
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- RSA-3072-based secure boot
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- AES-XTS-256-based flash encryption
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- Protected private key and device secrets from software access
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- Cryptographic accelerators for enhanced performance
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- Protection against physical fault injection attacks
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- Various peripherals:
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- 43x programmable GPIOs
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- 14x configurable capacitive touch GPIOs
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- USB OTG
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- LCD interface
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- camera interface
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- SPI
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- I2S
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- UART
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- ADC
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- DAC
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- LED PWM with up to 8 channels
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System requirements
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*******************
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Prerequisites
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-------------
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Espressif HAL requires WiFi and Bluetooth binary blobs in order work. Run the command
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below to retrieve those files.
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.. code-block:: console
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west blobs fetch hal_espressif
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.. note::
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It is recommended running the command above after :file:`west update`.
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Building & Flashing
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-------------------
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Build and flash applications as usual (see :ref:`build_an_application` and
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:ref:`application_run` for more details).
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.. zephyr-app-commands::
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:zephyr-app: samples/hello_world
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:board: esp32s2_saola
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:goals: build
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The usual ``flash`` target will work with the ``esp32s2_saola`` board
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configuration. Here is an example for the :ref:`hello_world`
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application.
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.. zephyr-app-commands::
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:zephyr-app: samples/hello_world
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:board: esp32s2_saola
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:goals: flash
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Open the serial monitor using the following command:
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.. code-block:: shell
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west espressif monitor
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After the board has automatically reset and booted, you should see the following
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message in the monitor:
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.. code-block:: console
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***** Booting Zephyr OS vx.x.x-xxx-gxxxxxxxxxxxx *****
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Hello World! esp32s2_saola
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Debugging
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---------
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As with much custom hardware, the ESP32 modules require patches to
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OpenOCD that are not upstreamed yet. Espressif maintains their own fork of
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the project. The custom OpenOCD can be obtained at `OpenOCD ESP32`_
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The Zephyr SDK uses a bundled version of OpenOCD by default. You can overwrite that behavior by adding the
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``-DOPENOCD=<path/to/bin/openocd> -DOPENOCD_DEFAULT_PATH=<path/to/openocd/share/openocd/scripts>``
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parameter when building.
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Here is an example for building the :ref:`hello_world` application.
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.. zephyr-app-commands::
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:zephyr-app: samples/hello_world
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:board: esp32s2_saola
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:goals: build flash
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:gen-args: -DOPENOCD=<path/to/bin/openocd> -DOPENOCD_DEFAULT_PATH=<path/to/openocd/share/openocd/scripts>
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You can debug an application in the usual way. Here is an example for the :ref:`hello_world` application.
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.. zephyr-app-commands::
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:zephyr-app: samples/hello_world
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:board: esp32s2_saola
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:goals: debug
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References
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**********
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.. [1] https://www.espressif.com/en/products/socs/esp32-s2
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.. _`ESP32S2 Technical Reference Manual`: https://espressif.com/sites/default/files/documentation/esp32-s2_technical_reference_manual_en.pdf
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.. _`ESP32S2 Datasheet`: https://www.espressif.com/sites/default/files/documentation/esp32-s2_datasheet_en.pdf
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.. _`OpenOCD ESP32`: https://github.com/espressif/openocd-esp32/releases
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