https://github.com/limpix31/r0

Ultra-precise human reaction meter
https://github.com/limpix31/r0

fpga hardware-design hdl verilog

Last synced: 4 months ago
JSON representation

Ultra-precise human reaction meter

• Host: GitHub
• URL: https://github.com/limpix31/r0
• Owner: LIMPIX31
• Created: 2025-06-29T12:26:23.000Z (12 months ago)
• Default Branch: main
• Last Pushed: 2025-07-31T14:41:38.000Z (11 months ago)
• Last Synced: 2025-09-11T22:30:24.089Z (9 months ago)
• Topics: fpga, hardware-design, hdl, verilog
• Language: SystemVerilog
• Homepage:
• Size: 25.4 KB
• Stars: 4
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: readme.md

Awesome Lists containing this project

README

          
# r0 - Ultra-precise human reaction meter

FPGA Digital Design challenge

## Features

* Sub-µ precision

* 720p @ 60Hz output

* Unboring font

* Pleasant color scheme

* Zero full-frame buffers

Target device: [Sipeed Tang Mega 138K Pro Dock](https://wiki.sipeed.com/hardware/en/tang/tang-mega-138k/mega-138k-pro.html)

## Key concepts

* No deep buffers or FIFOs

* State update and clock domain crossing during the VSync period

* ASCII font and color mapping

* Double-Dabble number format conversion

* UI update FSM

## TODOs

* [ ] Self-compensation \

 Automatically measures and subtracts latency from the result

* [ ] Dark/Light theme switch

* [x] TRNG instead of PRNG

* [x] Full HD

* [ ] RISC-V core

![img1](https://i.imgur.com/hQxPF07.jpeg)

![img2](https://i.imgur.com/OwlEGOg.jpeg)

### Video demonstration

[![video](https://img.youtube.com/vi/Y8pYJHHqsCo/0.jpg)](https://www.youtube.com/watch?v=Y8pYJHHqsCo)