# CamLink 4K: replacement gateware and firmware for an Elgato capture card

> CamLink 4K rebuilds the first-generation Elgato Cam Link 4K capture pipeline with LiteX gateware for its ECP5 FPGA and bare-metal C firmware for its FX3 controller. It documents the HDMI receiver, DDR3 frame buffer, GPIF-II link and USB UVC/UAC output, with host tools for flashing and validation.

- Type: Case study
- Targets: Firmware
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-08
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/enjoy-digital/camlink_4k>
- Primary source: <https://github.com/enjoy-digital/camlink_4k/blob/55bfabaa7b91cf3711f4d1e3da575b1039ead907/README.md>
- Catalog page: <https://awesomerea.org/resources/camlink-4k-case/>
- Record JSON: <https://awesomerea.org/resources/camlink-4k-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/camlink-4k-case/index.md)

## Requirements & limits

- **Prerequisites:** First-generation Cam Link 4K hardware; back up its full SPI flash before replacing firmware.
- **Prerequisites:** Linux host; LiteX, LiteDRAM, Migen, Yosys, nextpnr-ecp5, Project Trellis and arm-none-eabi-gcc for source builds.
- **Scope:** The Cam Link 4K MK.2 and Rev.3 use different designs.
- **License:** BSD 2-Clause licence.

## Primary sources

1. <https://github.com/enjoy-digital/camlink_4k/blob/55bfabaa7b91cf3711f4d1e3da575b1039ead907/README.md>
2. <https://github.com/enjoy-digital/camlink_4k/blob/55bfabaa7b91cf3711f4d1e3da575b1039ead907/LICENSE>

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## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.