Add JTAG Boundary Scan to readme

tigard-tools / tigard

An FTDI FT2232H-based multi-protocol tool for hardware hacking

Other

592 stars 72 forks source link

Add JTAG Boundary Scan to readme #42

Closed colinoflynn closed 3 years ago

colinoflynn commented 3 years ago

How verbose do you want the readme? I've confirmed that the follow works with JTAG boundary scan - I find this isn't as well documented in general (compared to say openocd) so wanted to be slightly more verbose. I haven't tried this with urjtag which supports boundary scan but the urjtag interface is more complicated for using with just arbitrary pin toggling than the software links I've included here.

securelyfitz commented 3 years ago

awesome, looks good. I haven't messed with jtag BS for a while and have been curious if there were other tools than URJTAG. Will merge this then add URJTAG shortly.

colinoflynn commented 3 years ago

Yeah the only details I found with urjtag for actual BS work was at https://www.bigmessowires.com/2011/06/26/jtag-extest-and-hair-loss/, which isn't remotely as user-friendly as I needed. In particular for automating it. Despite urjtag's tag line I never found the 'server' or 'library' aspect super workable...