Low level JTAG Interface programming

Question

What I have is direct access to the four JTAG Interface pins on an Atmel CPU.

What I need is low-level C code to wiggle those pins and implement two functions:

ReadMemoryWord(address)
WriteMemoryWord(address, word)

Anyone done this before? Or can point me in the right direction?

I already have one answer: Read the IEEE spec. I'm hoping there's a shorter path.

score 6 · Accepted Answer · answered Mar 01 '12 at 15:17

6

You could look through OpenOCD. I'm not sure if it's a shorter path :)

answered Mar 01 '12 at 15:17

XTL

1

I have been looking at OpenOCD and it has been helpful. – Tergiver Mar 02 '12 at 17:41

1 Answers1