boards/espressif/esp32c3_devkitc/doc/index.rst - third_party/github/zephyrproject-rtos/zephyr - Git at Google

 .. zephyr:board:: esp32c3_devkitc

 Overview
 ********

 ESP32-C3-DevKitC-02 is an entry-level development board based on ESP32-C3-WROOM-02,
 a general-purpose module with 4 MB SPI flash. This board integrates complete Wi-Fi and Bluetooth® Low Energy functions.
 For more information, check `ESP32-C3-DevKitC`_.

 Hardware
 ********

 ESP32-C3 is a single-core Wi-Fi and Bluetooth 5 (LE) microcontroller SoC,
 based on the open-source RISC-V architecture. It strikes the right balance of power,
 I/O capabilities and security, thus offering the optimal cost-effective
 solution for connected devices.
 The availability of Wi-Fi and Bluetooth 5 (LE) connectivity not only makes the device configuration easy,
 but it also facilitates a variety of use-cases based on dual connectivity.

 The features include the following:

 - 32-bit core RISC-V microcontroller with a maximum clock speed of 160 MHz
 - 400 KB of internal RAM
 - 802.11b/g/n/e/i
 - A Bluetooth LE subsystem that supports features of Bluetooth 5 and Bluetooth Mesh
 - Various peripherals:

   - 12-bit ADC with up to 6 channels
   - TWAI compatible with CAN bus 2.0
   - Temperature sensor
   - 3x SPI
   - 1x I2S
   - 1x I2C
   - 2x UART
   - LED PWM with up to 6 channels

 - Cryptographic hardware acceleration (RNG, ECC, RSA, SHA-2, AES)

 For more information, check the datasheet at `ESP32-C3 Datasheet`_ or the technical reference
 manual at `ESP32-C3 Technical Reference Manual`_.

 Supported Features
 ==================

 Current Zephyr's ESP32-C3-DevKitC board supports the following features:

 +------------+------------+-------------------------------------+
 | Interface  | Controller | Driver/Component                    |
 +============+============+=====================================+
 | UART       | on-chip    | serial port                         |
 +------------+------------+-------------------------------------+
 | GPIO       | on-chip    | gpio                                |
 +------------+------------+-------------------------------------+
 | PINMUX     | on-chip    | pinmux                              |
 +------------+------------+-------------------------------------+
 | USB-JTAG   | on-chip    | hardware interface                  |
 +------------+------------+-------------------------------------+
 | SPI Master | on-chip    | spi                                 |
 +------------+------------+-------------------------------------+
 | Timers     | on-chip    | counter                             |
 +------------+------------+-------------------------------------+
 | Watchdog   | on-chip    | watchdog                            |
 +------------+------------+-------------------------------------+
 | TRNG       | on-chip    | entropy                             |
 +------------+------------+-------------------------------------+
 | LEDC       | on-chip    | pwm                                 |
 +------------+------------+-------------------------------------+
 | SPI DMA    | on-chip    | spi                                 |
 +------------+------------+-------------------------------------+
 | TWAI       | on-chip    | can                                 |
 +------------+------------+-------------------------------------+
 | USB-CDC    | on-chip    | serial                              |
 +------------+------------+-------------------------------------+
 | ADC        | on-chip    | adc                                 |
 +------------+------------+-------------------------------------+
 | Wi-Fi      | on-chip    |                                     |
 +------------+------------+-------------------------------------+
 | Bluetooth  | on-chip    |                                     |
 +------------+------------+-------------------------------------+

 System requirements
 *******************

 Prerequisites
 =============

 Espressif HAL requires WiFi and Bluetooth binary blobs in order work. Run the command
 below to retrieve those files.

 .. code-block:: console

    west blobs fetch hal_espressif

 .. note::

    It is recommended running the command above after :file:`west update`.

 Building & Flashing
 *******************

 Simple boot
 ===========

 The board could be loaded using the single binary image, without 2nd stage bootloader.
 It is the default option when building the application without additional configuration.

 .. note::

    Simple boot does not provide any security features nor OTA updates.

 MCUboot bootloader
 ==================

 User may choose to use MCUboot bootloader instead. In that case the bootloader
 must be built (and flashed) at least once.

 There are two options to be used when building an application:

 1. Sysbuild
 2. Manual build

 .. note::

    User can select the MCUboot bootloader by adding the following line
    to the board default configuration file.

    .. code:: cfg

       CONFIG_BOOTLOADER_MCUBOOT=y

 Sysbuild
 ========

 The sysbuild makes possible to build and flash all necessary images needed to
 bootstrap the board with the ESP32 SoC.

 To build the sample application using sysbuild use the command:

 .. zephyr-app-commands::
    :tool: west
    :zephyr-app: samples/hello_world
    :board: esp32c3_devkitc
    :goals: build
    :west-args: --sysbuild
    :compact:

 By default, the ESP32 sysbuild creates bootloader (MCUboot) and application
 images. But it can be configured to create other kind of images.

 Build directory structure created by sysbuild is different from traditional
 Zephyr build. Output is structured by the domain subdirectories:

 .. code-block::

   build/
   ├── hello_world
   │   └── zephyr
   │       ├── zephyr.elf
   │       └── zephyr.bin
   ├── mcuboot
   │    └── zephyr
   │       ├── zephyr.elf
   │       └── zephyr.bin
   └── domains.yaml

 .. note::

    With ``--sysbuild`` option the bootloader will be re-build and re-flash
    every time the pristine build is used.

 For more information about the system build please read the :ref:`sysbuild` documentation.

 Manual build
 ============

 During the development cycle, it is intended to build & flash as quickly possible.
 For that reason, images can be built one at a time using traditional build.

 The instructions following are relevant for both manual build and sysbuild.
 The only difference is the structure of the build directory.

 .. note::

    Remember that bootloader (MCUboot) needs to be flash at least once.

 Build and flash applications as usual (see :ref:`build_an_application` and
 :ref:`application_run` for more details).

 .. zephyr-app-commands::
    :zephyr-app: samples/hello_world
    :board: esp32c3_devkitc
    :goals: build

 The usual ``flash`` target will work with the ``esp32c3_devkitc`` board
 configuration. Here is an example for the :zephyr:code-sample:`hello_world`
 application.

 .. zephyr-app-commands::
    :zephyr-app: samples/hello_world
    :board: esp32c3_devkitc
    :goals: flash

 Open the serial monitor using the following command:

 .. code-block:: shell

    west espressif monitor

 After the board has automatically reset and booted, you should see the following
 message in the monitor:

 .. code-block:: console

    ***** Booting Zephyr OS vx.x.x-xxx-gxxxxxxxxxxxx *****
    Hello World! esp32c3_devkitc

 Debugging
 *********

 As with much custom hardware, the ESP32-C3 modules require patches to
 OpenOCD that are not upstreamed yet. Espressif maintains their own fork of
 the project. The custom OpenOCD can be obtained at `OpenOCD ESP32`_.

 The Zephyr SDK uses a bundled version of OpenOCD by default. You can overwrite that behavior by adding the
 ``-DOPENOCD=<path/to/bin/openocd> -DOPENOCD_DEFAULT_PATH=<path/to/openocd/share/openocd/scripts>``
 parameter when building.

 Here is an example for building the :zephyr:code-sample:`hello_world` application.

 .. zephyr-app-commands::
    :zephyr-app: samples/hello_world
    :board: esp32c3_devkitc
    :goals: build flash
    :gen-args: -DOPENOCD=<path/to/bin/openocd> -DOPENOCD_DEFAULT_PATH=<path/to/openocd/share/openocd/scripts>

 You can debug an application in the usual way. Here is an example for the :zephyr:code-sample:`hello_world` application.

 .. zephyr-app-commands::
    :zephyr-app: samples/hello_world
    :board: esp32c3_devkitc
    :goals: debug

 References
 **********

 .. target-notes::

 .. _`ESP32-C3-DevKitC`: https://docs.espressif.com/projects/esp-dev-kits/en/latest/esp32c3/esp32-c3-devkitc-02/index.html
 .. _`ESP32-C3 Datasheet`: https://www.espressif.com/sites/default/files/documentation/esp32-c3_datasheet_en.pdf
 .. _`ESP32-C3 Technical Reference Manual`: https://espressif.com/sites/default/files/documentation/esp32-c3_technical_reference_manual_en.pdf
 .. _`OpenOCD ESP32`: https://github.com/espressif/openocd-esp32/releases
	.. zephyr:board:: esp32c3_devkitc

	Overview
	********

	ESP32-C3-DevKitC-02 is an entry-level development board based on ESP32-C3-WROOM-02,
	a general-purpose module with 4 MB SPI flash. This board integrates complete Wi-Fi and Bluetooth® Low Energy functions.
	For more information, check `ESP32-C3-DevKitC`_.

	Hardware
	********

	ESP32-C3 is a single-core Wi-Fi and Bluetooth 5 (LE) microcontroller SoC,
	based on the open-source RISC-V architecture. It strikes the right balance of power,
	I/O capabilities and security, thus offering the optimal cost-effective
	solution for connected devices.
	The availability of Wi-Fi and Bluetooth 5 (LE) connectivity not only makes the device configuration easy,
	but it also facilitates a variety of use-cases based on dual connectivity.

	The features include the following:

	- 32-bit core RISC-V microcontroller with a maximum clock speed of 160 MHz
	- 400 KB of internal RAM
	- 802.11b/g/n/e/i
	- A Bluetooth LE subsystem that supports features of Bluetooth 5 and Bluetooth Mesh
	- Various peripherals:

	- 12-bit ADC with up to 6 channels
	- TWAI compatible with CAN bus 2.0
	- Temperature sensor
	- 3x SPI
	- 1x I2S
	- 1x I2C
	- 2x UART
	- LED PWM with up to 6 channels

	- Cryptographic hardware acceleration (RNG, ECC, RSA, SHA-2, AES)

	For more information, check the datasheet at `ESP32-C3 Datasheet`_ or the technical reference
	manual at `ESP32-C3 Technical Reference Manual`_.

	Supported Features
	==================

	Current Zephyr's ESP32-C3-DevKitC board supports the following features:

	+------------+------------+-------------------------------------+
	\| Interface \| Controller \| Driver/Component \|
	+============+============+=====================================+
	\| UART \| on-chip \| serial port \|
	+------------+------------+-------------------------------------+
	\| GPIO \| on-chip \| gpio \|
	+------------+------------+-------------------------------------+
	\| PINMUX \| on-chip \| pinmux \|
	+------------+------------+-------------------------------------+
	\| USB-JTAG \| on-chip \| hardware interface \|
	+------------+------------+-------------------------------------+
	\| SPI Master \| on-chip \| spi \|
	+------------+------------+-------------------------------------+
	\| Timers \| on-chip \| counter \|
	+------------+------------+-------------------------------------+
	\| Watchdog \| on-chip \| watchdog \|
	+------------+------------+-------------------------------------+
	\| TRNG \| on-chip \| entropy \|
	+------------+------------+-------------------------------------+
	\| LEDC \| on-chip \| pwm \|
	+------------+------------+-------------------------------------+
	\| SPI DMA \| on-chip \| spi \|
	+------------+------------+-------------------------------------+
	\| TWAI \| on-chip \| can \|
	+------------+------------+-------------------------------------+
	\| USB-CDC \| on-chip \| serial \|
	+------------+------------+-------------------------------------+
	\| ADC \| on-chip \| adc \|
	+------------+------------+-------------------------------------+
	\| Wi-Fi \| on-chip \| \|
	+------------+------------+-------------------------------------+
	\| Bluetooth \| on-chip \| \|
	+------------+------------+-------------------------------------+

	System requirements
	*******************

	Prerequisites
	=============

	Espressif HAL requires WiFi and Bluetooth binary blobs in order work. Run the command
	below to retrieve those files.

	.. code-block:: console

	west blobs fetch hal_espressif

	.. note::

	It is recommended running the command above after :file:`west update`.

	Building & Flashing
	*******************

	Simple boot
	===========

	The board could be loaded using the single binary image, without 2nd stage bootloader.
	It is the default option when building the application without additional configuration.

	.. note::

	Simple boot does not provide any security features nor OTA updates.

	MCUboot bootloader
	==================

	User may choose to use MCUboot bootloader instead. In that case the bootloader
	must be built (and flashed) at least once.

	There are two options to be used when building an application:

	1. Sysbuild
	2. Manual build

	.. note::

	User can select the MCUboot bootloader by adding the following line
	to the board default configuration file.

	.. code:: cfg

	CONFIG_BOOTLOADER_MCUBOOT=y

	Sysbuild
	========

	The sysbuild makes possible to build and flash all necessary images needed to
	bootstrap the board with the ESP32 SoC.

	To build the sample application using sysbuild use the command:

	.. zephyr-app-commands::
	:tool: west
	:zephyr-app: samples/hello_world
	:board: esp32c3_devkitc
	:goals: build
	:west-args: --sysbuild
	:compact:

	By default, the ESP32 sysbuild creates bootloader (MCUboot) and application
	images. But it can be configured to create other kind of images.

	Build directory structure created by sysbuild is different from traditional
	Zephyr build. Output is structured by the domain subdirectories:

	.. code-block::

	build/
	├── hello_world
	│ └── zephyr
	│ ├── zephyr.elf
	│ └── zephyr.bin
	├── mcuboot
	│ └── zephyr
	│ ├── zephyr.elf
	│ └── zephyr.bin
	└── domains.yaml

	.. note::

	With ``--sysbuild`` option the bootloader will be re-build and re-flash
	every time the pristine build is used.

	For more information about the system build please read the :ref:`sysbuild` documentation.

	Manual build
	============

	During the development cycle, it is intended to build & flash as quickly possible.
	For that reason, images can be built one at a time using traditional build.

	The instructions following are relevant for both manual build and sysbuild.
	The only difference is the structure of the build directory.

	.. note::

	Remember that bootloader (MCUboot) needs to be flash at least once.

	Build and flash applications as usual (see :ref:`build_an_application` and
	:ref:`application_run` for more details).

	.. zephyr-app-commands::
	:zephyr-app: samples/hello_world
	:board: esp32c3_devkitc
	:goals: build

	The usual ``flash`` target will work with the ``esp32c3_devkitc`` board
	configuration. Here is an example for the :zephyr:code-sample:`hello_world`
	application.

	.. zephyr-app-commands::
	:zephyr-app: samples/hello_world
	:board: esp32c3_devkitc
	:goals: flash

	Open the serial monitor using the following command:

	.. code-block:: shell

	west espressif monitor

	After the board has automatically reset and booted, you should see the following
	message in the monitor:

	.. code-block:: console

	*** Booting Zephyr OS vx.x.x-xxx-gxxxxxxxxxxxx ***
	Hello World! esp32c3_devkitc

	Debugging
	*********

	As with much custom hardware, the ESP32-C3 modules require patches to
	OpenOCD that are not upstreamed yet. Espressif maintains their own fork of
	the project. The custom OpenOCD can be obtained at `OpenOCD ESP32`_.

	The Zephyr SDK uses a bundled version of OpenOCD by default. You can overwrite that behavior by adding the
	``-DOPENOCD=<path/to/bin/openocd> -DOPENOCD_DEFAULT_PATH=<path/to/openocd/share/openocd/scripts>``
	parameter when building.

	Here is an example for building the :zephyr:code-sample:`hello_world` application.

	.. zephyr-app-commands::
	:zephyr-app: samples/hello_world
	:board: esp32c3_devkitc
	:goals: build flash
	:gen-args: -DOPENOCD=<path/to/bin/openocd> -DOPENOCD_DEFAULT_PATH=<path/to/openocd/share/openocd/scripts>

	You can debug an application in the usual way. Here is an example for the :zephyr:code-sample:`hello_world` application.

	.. zephyr-app-commands::
	:zephyr-app: samples/hello_world
	:board: esp32c3_devkitc
	:goals: debug

	References
	**********

	.. target-notes::

	.. _`ESP32-C3-DevKitC`: https://docs.espressif.com/projects/esp-dev-kits/en/latest/esp32c3/esp32-c3-devkitc-02/index.html
	.. _`ESP32-C3 Datasheet`: https://www.espressif.com/sites/default/files/documentation/esp32-c3_datasheet_en.pdf
	.. _`ESP32-C3 Technical Reference Manual`: https://espressif.com/sites/default/files/documentation/esp32-c3_technical_reference_manual_en.pdf
	.. _`OpenOCD ESP32`: https://github.com/espressif/openocd-esp32/releases