Handheld game console

A small six-button handheld game console with a bootloader and games stored in external flash memory. A complete solution was created to create, simulate, compile and upload apps for the device.

There are currently 2 games written for the console:

• Tetris
• Tile World

Specifications

• Display: 1.5" OLED 128x128, 4-bit gray.
• MCU: ATmega3208 @ 10 MHz, 4 kB RAM, 32 kB ROM (bootloader uses 8.25 kB).
• Memory: 4 kB EEPROM (up to 64 kB), 1 MB flash (up to 8 MB).
• Physical: 40 mm x 71 mm x 15.4 mm, 60 g.
• Battery: 850 mAh Li-Po, 5-20h active, several months standby, USB micro B charging.

Hardware

• MCU: ATmega3208, compatible with ATmega4808, AVR128DA28, AVR64DA28, AVR32DA28 (none tested).
• EEPROM: FT25C32A, 4 kB (compatible with same series devices)
• Flash: AT25SF081B, 1 MB (compatible with 25-series flash devices)
• Display: EastRising ER-OLED015-3 (SSD1327 display controller, 15V VCC)

Tools and building

Everything was built and tested on Linux only (Ubuntu 20.04). The PCB was made in KiCAD 6 and the enclosure was made in FreeCAD 0.19. Building and using the software requires the following tools and libraries:

• AVR GCC >= 5.4.0 (7.3.0 used)
• GCC >= 9
• Python >= 3.7
• freeglut, pulseaudio, libpng

Architecture

The architecture of the software is described in details in sw/README.md.

Project structure

• hw: PCB and enclosure
• sw: all software SDK including programming utility and all apps.
• docs: documentation source files

License

All code is licensed under Apache License 2.0 and all assets are licensed under Creative Commons v4.0, unless otherwise indicated. Bitmap fonts were taken from the u8g2 project and are not my work. Credits to my brother for making the game music.