ODROID-GO
Overview
ODROID-GO Game Kit is a “Do it yourself” (“DIY”) portable game console by HardKernel. It features a custom ESP32-WROVER with 16 MB flash and it operates from 80 MHz - 240 MHz 1.
The features include the following:
Dual core Xtensa microprocessor (LX6), running at 80 - 240MHz
4 MB of PSRAM
802.11b/g/n/e/i
Bluetooth v4.2 BR/EDR and BLE
2.4 inch 320x240 TFT LCD
Speaker
Micro SD card slot
Micro USB port (battery charging and USB_UART data communication
Input Buttons (Menu, Volume, Select, Start, A, B, Direction Pad)
Expansion port (I2C, GPIO, SPI)
Cryptographic hardware acceleration (RNG, ECC, RSA, SHA-2, AES)
Fig. 195 ODROID-Go Game Kit
External Connector
PIN # |
Signal Name |
ESP32-WROVER Functions |
|---|---|---|
1 |
GND |
GND |
2 |
VSPI.SCK (IO18) |
GPIO18, VSPICLK |
3 |
IO12 |
GPIO12 |
4 |
IO15 |
GPIO15, ADC2_CH3 |
5 |
IO4 |
GPIO4, ADC2_CH0 |
6 |
P3V3 |
3.3 V |
7 |
VSPI.MISO (IO19) |
GPIO19, VSPIQ |
8 |
VSPI.MOSI (IO23) |
GPIO23, VSPID |
9 |
N.C |
N/A |
10 |
VBUS |
USB VBUS (5V) |
Supported Features
The Zephyr odroid_go board configuration supports the following hardware features:
Interface |
Controller |
Driver/Component |
|---|---|---|
UART |
on-chip |
serial port |
GPIO |
on-chip |
gpio |
PINMUX |
on-chip |
pinmux |
I2C |
on-chip |
i2c |
Programming
The ESP32 toolchain xtensa-esp32-elf is required to build this port.
Install the toolchain:
west espressif installNote
By default, the toolchain will be downloaded and installed under $HOME/.espressif directory (%USERPROFILE%/.espressif on Windows).
Set up build environment
With the toolchain installed, the Zephyr build system must be instructed to use this particular variant by setting the following shell variables:
export ZEPHYR_TOOLCHAIN_VARIANT="espressif"
export ESPRESSIF_TOOLCHAIN_PATH="/path/to/xtensa-esp32-elf/"
Finally, retrieve required submodules to build this port. This might take a while for the first time:
west espressif update
Note
It is recommended running the command above after west update so
that submodules also get updated.
Flashing
The usual flash target will work with the odroid_go board configuration.
Here is an example for the Hello World application.
# From the root of the zephyr repository
west build -b odroid_go samples/hello_world
Refer to Building an Application and Run an Application for more details.
All flashing options are handled by the West (Zephyr’s meta-tool) tool, including flashing
with custom options such as a different serial port. The west tool supports
specific options for the ESP32 board, as listed here:
- --esp-idf-path ESP_IDF_PATH
path to ESP-IDF
- --esp-device ESP_DEVICE
serial port to flash, default /dev/ttyUSB0
- --esp-baud-rate ESP_BAUD_RATE
serial baud rate, default 921600
- --esp-flash-size ESP_FLASH_SIZE
flash size, default “detect”
- --esp-flash-freq ESP_FLASH_FREQ
flash frequency, default “40m”
- --esp-flash-mode ESP_FLASH_MODE
flash mode, default “dio”
- --esp-tool ESP_TOOL
complete path to espidf, default is to search for it in [ESP_IDF_PATH]/components/esptool_py/esptool/esptool.py
- --esp-flash-bootloader ESP_FLASH_BOOTLOADER
Bootloader image to flash
- --esp-flash-partition_table ESP_FLASH_PARTITION_TABLE
Partition table to flash
For example, to flash to /dev/ttyUSB0, use the following command after
having build the application in the build directory:
west flash -d build/ --skip-rebuild --esp-device /dev/ttyUSB0
Connect ODROID-GO to your PC via the mini USB port and run your favorite terminal program to listen for output.
minicom -D /dev/ttyUSB0 -b 115200
Power off and then power on ODROID-GO. You should see the following message in your terminal:
Hello World! odroid_go