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.. zephyr:board:: adafruit_feather_esp32s3_tft_reverse |
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Overview |
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The Adafruit ESP32-S3 Reverse TFT Feather is a development board in the |
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Feather standard layout, sharing peripheral placement with other devices |
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labeled as Feathers or FeatherWings. The board is equipped with an |
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ESP32-S3 mini module, a fuel gauge, a USB-C and Qwiic/STEMMA-QT connector. |
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This variant additionally comes with a 240x135 pixel IPS TFT color display |
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on the backside of the boards and with 3 buttons. |
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For more information, check |
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`Adafruit ESP32-S3 Reverse TFT Feather`_. |
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Hardware |
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- ESP32-S3 mini module, featuring the dual core 32-bit Xtensa Microprocessor |
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(Tensilica LX7), running at up to 240MHz |
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- 512KB SRAM and either 4MB flash + 2MB PSRAM |
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- USB-C directly connected to the ESP32-S3 for USB/UART and JTAG debugging |
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- LiPo connector and built-in battery charging when powered via USB-C |
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- MAX17048 fuel gauge for battery voltage and state-of-charge reporting |
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- Charging indicator LED, user LED, reset buttons |
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- Built-in NeoPixel indicator RGB LED |
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- STEMMA QT connector for I2C devices, with switchable power for low-power mode |
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- 240x135 pixel IPS TFT color display with 1.14" diagonal and ST7789 chipset |
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- Three User Tactile buttons - D0, D1, and D2. D0/BOOT0 is also used for entering ROM |
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bootloader mode if necessary. |
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Asymmetric Multiprocessing (AMP) |
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================================ |
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The ESP32-S3 SoC allows 2 different applications to be executed in asymmetric |
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multiprocessing. Due to its dual-core architecture, each core can be enabled to |
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execute customized tasks in stand-alone mode and/or exchanging data over OpenAMP |
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framework. See :zephyr:code-sample-category:`ipc` folder as code reference. |
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For more information, check the datasheet at `ESP32-S3 Datasheet`_. |
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Supported Features |
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================== |
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.. zephyr:board-supported-hw:: |
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Connections and IOs |
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=================== |
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The `Adafruit ESP32-S3 Reverse TFT Feather User Guide`_ has detailed information about |
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the board including `pinouts`_ and the `schematic`_. |
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Programming and Debugging |
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************************* |
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.. zephyr:board-supported-runners:: |
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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 |
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command 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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Simple boot |
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----------- |
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The board could be loaded using the single binary image, without 2nd stage |
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bootloader. It is the default option when building the application without |
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additional configuration. |
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.. note:: |
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Simple boot does not provide any security features nor OTA updates. |
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MCUboot bootloader |
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------------------ |
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User may choose to use MCUboot bootloader instead. In that case the bootloader |
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must be build (and flash) at least once. |
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There are two options to be used when building an application: |
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1. Sysbuild |
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2. Manual build |
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.. note:: |
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User can select the MCUboot bootloader by adding the following line |
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to the board default configuration file. |
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.. code:: cfg |
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CONFIG_BOOTLOADER_MCUBOOT=y |
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Sysbuild |
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-------- |
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The sysbuild makes possible to build and flash all necessary images needed to |
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bootstrap the board with the ESP32-S3 SoC. |
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To build the sample application using sysbuild use the command: |
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.. zephyr-app-commands:: |
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:tool: west |
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:zephyr-app: samples/hello_world |
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:board: adafruit_feather_esp32s3_tft_reverse/esp32s3/procpu |
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:goals: build |
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:west-args: --sysbuild |
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:compact: |
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By default, the ESP32-S3 sysbuild creates bootloader (MCUboot) and application |
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images. But it can be configured to create other kind of images. |
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Build directory structure created by sysbuild is different from traditional |
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Zephyr build. Output is structured by the domain subdirectories: |
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.. code-block:: |
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build/ |
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├── hello_world |
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│ └── zephyr |
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│ ├── zephyr.elf |
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│ └── zephyr.bin |
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├── mcuboot |
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│ └── zephyr |
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│ ├── zephyr.elf |
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│ └── zephyr.bin |
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└── domains.yaml |
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.. note:: |
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With ``--sysbuild`` option the bootloader will be re-build and re-flash |
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every time the pristine build is used. |
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For more information about the system build please read the :ref:`sysbuild` |
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documentation. |
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Manual build |
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------------ |
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During the development cycle, it is intended to build & flash as quickly |
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possible. For that reason, images can be build one at a time using traditional |
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build. |
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The instructions following are relevant for both manual build and sysbuild. |
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The only difference is the structure of the build directory. |
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.. note:: |
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Remember that bootloader (MCUboot) needs to be flash at least once. |
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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: :board: adafruit_feather_esp32s3_tft_reverse/esp32s3/procpu |
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:goals: build |
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The usual ``flash`` target will work with the ``adafruit_feather_esp32s3_tft_reverse`` |
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board. Here is an example for the :zephyr:code-sample:`hello_world` application. |
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.. zephyr-app-commands:: |
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:zephyr-app: samples/hello_world |
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:board: adafruit_feather_esp32s3_tft_reverse/esp32s3/procpu |
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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! adafruit_feather_esp32s3_tft_reverse/esp32s3/procpu |
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Debugging |
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========= |
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ESP32-S3 support on OpenOCD is available upstream as of version 0.12.0. Download |
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and install OpenOCD from `OpenOCD`_. |
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ESP32-S3 has a built-in JTAG circuitry and can be debugged without any |
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additional chip. Only an USB cable connected to the D+/D- pins is necessary. |
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Further documentation can be obtained from the SoC vendor in `JTAG debugging |
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for ESP32-S3`_. |
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Here is an example for building the :zephyr:code-sample:`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: adafruit_feather_esp32s3_tft_reverse/esp32s3/procpu |
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:goals: build flash |
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You can debug an application in the usual way. Here is an example for the |
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:zephyr:code-sample:`hello_world` application. |
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.. zephyr-app-commands:: |
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:zephyr-app: samples/hello_world |
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:board: adafruit_feather_esp32s3_tft_reverse/esp32s3/procpu |
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:goals: debug |
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References |
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********** |
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.. target-notes:: |
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.. _`Adafruit ESP32-S3 Reverse TFT Feather`: |
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https://www.adafruit.com/product/5691 |
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.. _`OpenOCD`: |
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https://github.com/openocd-org/openocd |
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.. _`JTAG debugging for ESP32-S3`: |
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https://docs.espressif.com/projects/esp-idf/en/latest/esp32s3/api-guides/jtag-debugging/ |
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.. _Adafruit ESP32-S3 Reverse TFT Feather User Guide: |
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https://learn.adafruit.com/esp32-s3-reverse-tft-feather |
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.. _pinouts: |
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https://learn.adafruit.com/esp32-s3-reverse-tft-feather/pinouts |
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.. _schematic: |
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https://learn.adafruit.com/esp32-s3-reverse-tft-feather/downloads |
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.. _ESP32-S3 Datasheet: |
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https://www.espressif.com/sites/default/files/documentation/esp32-s3-wroom-1_wroom-1u_datasheet_en.pdf |
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.. _ESP32 Technical Reference Manual: |
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https://www.espressif.com/sites/default/files/documentation/esp32-s3_technical_reference_manual_en.pdf
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