119 lines
3.5 KiB
ReStructuredText
119 lines
3.5 KiB
ReStructuredText
.. _esp32c3_devkitm:
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ESP32-C3
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########
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Overview
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********
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ESP32-C3 is a single-core Wi-Fi and Bluetooth 5 (LE) microcontroller SoC,
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based on the open-source RISC-V architecture. It strikes the right balance of power,
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I/O capabilities and security, thus offering the optimal cost-effective
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solution for connected devices.
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The availability of Wi-Fi and Bluetooth 5 (LE) connectivity not only makes the device configuration easy,
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but it also facilitates a variety of use-cases based on dual connectivity. [1]_
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The features include the following:
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- 32-bit core RISC-V microcontroller with a maximum clock speed of 160 MHz
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- 400 KB of internal RAM
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- 802.11b/g/n/e/i
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- A Bluetooth LE subsystem that supports features of Bluetooth 5 and Bluetooth mesh
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- Various peripherals:
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- 12-bit ADC with up to 6 channels
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- TWAI compatible with CAN bus 2.0
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- Temperature sensor
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- 3x SPI
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- 1x I2S
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- 1x I2C
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- 2x UART
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- LED PWM with up to 6 channels
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- Cryptographic hardware acceleration (RNG, ECC, RSA, SHA-2, AES)
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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: esp32c3_devkitm
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:goals: build
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The usual ``flash`` target will work with the ``esp32c3_devkitm`` 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: esp32c3_devkitm
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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! esp32c3_devkitm
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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: esp32c3_devkitm
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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: esp32c3_devkitm
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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-c3
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.. _`ESP32C3 Technical Reference Manual`: https://espressif.com/sites/default/files/documentation/esp32-c3_technical_reference_manual_en.pdf
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.. _`ESP32C3 Datasheet`: https://www.espressif.com/sites/default/files/documentation/esp32-c3_datasheet_en.pdf
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.. _`OpenOCD ESP32`: https://github.com/espressif/openocd-esp32/releases
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