go-jtagenum | JTAG enumeration tool written in Go

go-jtagenum is a Go library typically used in Internet of Things (IoT), Raspberry Pi applications. go-jtagenum has no bugs, it has no vulnerabilities, it has a Strong Copyleft License and it has low support. You can download it from GitHub.

This project is aimed to find which pins exposed by the target device are JTAG pins. It does so by enumerating throughout the provided pins set and trying to abuse some JTAG features, such as BYPASS and IDCODE registers. It is written in Go and supposed to be used under Linux (or any OS which Go supports) on the device with GPIO lines exported to userspace. Raspberry Pi 1,2,3 is the most famous example. The tool drives GPIO either using [go-rpio] or [libgpiod] The first one is designed for Raspberry Pi and uses gpiomem driver which makes it really fast. libgpiod works on any Linux system. Thus, this tool can be used on general-purpose laptops/desktops as well. However, the corresponding device is required that exposes /dev/gpiochipX pseudo-files. Initially this project was a port of [JTAGenum] to Golang. Current version has implementation mostly ported from another great project [JTAGulator] For technical documentation refer to the [original project] Also, consider comments in the source code that were taken from JTAGulator implementation.