An experimental pocket computer built on a LilyGo T-HMI (ESP32-S3 + touchscreen). The project explores building a small interactive system in Rust, with a focus on responsive input, incremental rendering, and simple app-style software structure.
- Rust (no_std)
- Custom grid-based screen model
- Dirty rendering (only redraws what changed)
- Touch input + on-screen buttons
- App framework with launcher
- System title bar and status bar
- Color picker app
The UI originally used full-screen redraws (~200ms per update). The renderer was reworked to use dirty cell tracking and incremental updates.
Typical timings now:
- Full screen clear: ~30–40ms
- Normal UI updates: ~8–15ms
This significantly improves input responsiveness.
- LilyGo T-HMI
- ESP32-S3
- ST7789 LCD
- Rust (
no_std) embedded-graphics,mipidsi
- Calibration & settings app
- Persistent storage (mem-fs integration)
- Games (Snake, Breakout, etc.)
- Keyboard input (on-screen / Bluetooth)
- Optional DMA-backed graphics backend
- Additional apps & tools