Figuring out the JTAG pinout on a device turns out to be the most time consuming hardware portion of many hacks. [hunz] started a project called JTAG Finder to automatically detect the JTAG ...

He absorbed the JTAG specification and coded a bit banging programmer using an Arduino. We’ve used JTAG many times to program ARM chips. But until now we never took the time to figure out how t ...