Qualcomm released the open‐source Embedded USB Debug (EUD) library for SoCs since 2018, enabling deep debug via USB.
EUD exposes a SWD debug interface over a standard USB port with no extra hardware required.
Qualcomm’s openOCD fork now integrates EUD support, but community patches and rebases were needed for modern toolchains.
EUD can simplify debugging of Linux, U-Boot, TF-A, and OP-TEE on Qualcomm platforms using OpenOCD.
Additional COM (UART) and trace peripherals are available but not yet integrated into OpenOCD.
Community contributions are needed for SoC-specific register addresses, SMP support, and resolving quirks.
EUD remains disabled in production by fuse or signed debug policy and does not compromise higher execution levels.
EUD can significantly reduce debugging equipment costs and setup time, improving remote and closed‐case debugging workflows.
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