486: A Nice Rainbow Dream
Antoine van Gelder from Great Scott Gadgets discusses the development of Cynthion, an FPGA-based USB protocol analysis tool, and FaceDancer, a Python library for emulating USB devices. He explains the technical differences between MIDI and USB for digital musical instruments, highlighting latency and timing issues, and details how Cynthion can be used to learn USB standards and debug complex protocol bugs like zero-length packet errors. Van Gelder also shares insights on Great Scott Gadgets' open-source business model and the challenges of implementing robust USB stacks in embedded systems.