172 lines
6.2 KiB
ReStructuredText
172 lines
6.2 KiB
ReStructuredText
.. _odroid_go:
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ODROID-GO
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#########
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Overview
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********
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ODROID-GO Game Kit is a "Do it yourself" ("DIY") portable game console by
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HardKernel. It features a custom ESP32-WROVER with 16 MB flash and it operates
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from 80 MHz - 240 MHz [1]_.
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The features include the following:
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- Dual core Xtensa microprocessor (LX6), running at 80 - 240MHz
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- 4 MB of PSRAM
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- 802.11b/g/n/e/i
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- Bluetooth v4.2 BR/EDR and BLE
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- 2.4 inch 320x240 TFT LCD
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- Speaker
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- Micro SD card slot
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- Micro USB port (battery charging and USB_UART data communication
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- Input Buttons (Menu, Volume, Select, Start, A, B, Direction Pad)
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- Expansion port (I2C, GPIO, SPI)
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- Cryptographic hardware acceleration (RNG, ECC, RSA, SHA-2, AES)
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.. figure:: img/odroid_go.png
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:align: center
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:alt: ODROID-GO
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ODROID-Go Game Kit
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External Connector
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------------------
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+-------+------------------+-------------------------+
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| PIN # | Signal Name | ESP32-WROVER Functions |
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+=======+==================+=========================+
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| 1 | GND | GND |
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+-------+------------------+-------------------------+
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| 2 | VSPI.SCK (IO18) | GPIO18, VSPICLK |
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+-------+------------------+-------------------------+
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| 3 | IO12 | GPIO12 |
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+-------+------------------+-------------------------+
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| 4 | IO15 | GPIO15, ADC2_CH3 |
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+-------+------------------+-------------------------+
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| 5 | IO4 | GPIO4, ADC2_CH0 |
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+-------+------------------+-------------------------+
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| 6 | P3V3 | 3.3 V |
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+-------+------------------+-------------------------+
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| 7 | VSPI.MISO (IO19) | GPIO19, VSPIQ |
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+-------+------------------+-------------------------+
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| 8 | VSPI.MOSI (IO23) | GPIO23, VSPID |
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+-------+------------------+-------------------------+
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| 9 | N.C | N/A |
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+-------+------------------+-------------------------+
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| 10 | VBUS | USB VBUS (5V) |
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+-------+------------------+-------------------------+
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Supported Features
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******************
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The Zephyr odroid_go 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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| UART | on-chip | serial port |
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+------------+------------+-------------------------------------+
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| GPIO | on-chip | gpio |
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+------------+------------+-------------------------------------+
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| PINMUX | on-chip | pinmux |
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+------------+------------+-------------------------------------+
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| I2C | on-chip | i2c |
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+------------+------------+-------------------------------------+
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Programming
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***********
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Two components are required in order to build applications for this board: the
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`toolchain`_ and the `SDK`_. Both are provided by the SoC manufacturer.
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The SDK contains headers and a hardware abstraction layer library (provided only
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as object files) that are required for the port to function.
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The toolchain is available for Linux, Windows, and macOS hosts and instructions
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to obtain and set them up are available in the `ESP-IDF repository
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<https://github.com/espressif/esp-idf>`_, as explained in the
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`ESP-IDF Programming Guide <SDK>`_.
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Set up build environment
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------------------------
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With both the toolchain and SDK installed, the Zephyr build system must be
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instructed to use this particular variant by setting the following shell
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variables:
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.. code-block:: console
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export ZEPHYR_TOOLCHAIN_VARIANT="espressif"
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export ESPRESSIF_TOOLCHAIN_PATH="/path/to/xtensa-esp32-elf/"
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Flashing
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--------
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The usual ``flash`` target will work with the ``odroid_go`` board configuration.
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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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:host-os: unix
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:board: odroid_go
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:goals: build
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:gen-args: -DESP_IDF_PATH=/path/to/esp-idf/
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Refer to :ref:`build_an_application` and :ref:`application_run` for more
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details.
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All flashing options are handled by the :ref:`west` tool, including flashing
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with custom options such as a different serial port. The ``west`` tool supports
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specific options for the ESP32 board, as listed here:
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--esp-idf-path ESP_IDF_PATH
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path to ESP-IDF
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--esp-device ESP_DEVICE
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serial port to flash, default /dev/ttyUSB0
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--esp-baud-rate ESP_BAUD_RATE
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serial baud rate, default 921600
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--esp-flash-size ESP_FLASH_SIZE
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flash size, default "detect"
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--esp-flash-freq ESP_FLASH_FREQ
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flash frequency, default "40m"
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--esp-flash-mode ESP_FLASH_MODE
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flash mode, default "dio"
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--esp-tool ESP_TOOL complete path to espidf, default is to search for it in
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[ESP_IDF_PATH]/components/esptool_py/esptool/esptool.py
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--esp-flash-bootloader ESP_FLASH_BOOTLOADER
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Bootloader image to flash
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--esp-flash-partition_table ESP_FLASH_PARTITION_TABLE
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Partition table to flash
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For example, to flash to ``/dev/ttyUSB0``, use the following command after
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having build the application in the ``build`` directory:
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.. code-block:: console
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west flash -d build/ --skip-rebuild --esp-tool=/path/to/esp-idf/components/esptool_py/esptool/esptool.py --esp-device /dev/ttyUSB0
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Connect ODROID-GO to your PC via the mini USB port and run your favorite
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terminal program to listen for output.
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.. code-block:: console
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minicom -D /dev/ttyUSB0 -b 115200
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Power off and then power on ODROID-GO. You should see the following message in
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your terminal:
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.. code-block:: console
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Hello World! odroid_go
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References
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**********
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.. target-notes::
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.. [1] https://wiki.odroid.com/odroid_go/odroid_go
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.. _`toolchain`: https://docs.espressif.com/projects/esp-idf/en/latest/get-started/index.html#get-started-setup-toolchain
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.. _`SDK`: https://docs.espressif.com/projects/esp-idf/en/latest/get-started/index.html#get-started-get-esp-idf
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