Firmware reverse engineering of the Elgato Cam Link 4K (USB 0fd9:0066): vendor HID protocol, SPI flash layout, FX3 and ECP5 firmware formats, update path, security analysis, and an independent flashing tool.
Headless HDMI video rotator for Raspberry Pi 4 — captures USB video, rotates, and displays fullscreen via KMS/DRM. Designed for iPhone vertical viewfinder setups.
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