1) If I bring in another board, I can connect via JTAG. So I'm declaring the host and associated peripherals innocent.
2) Here is what I was doing that almost certainly caused the problem: I uploaded a .hex file, processed it, and stored it off to flash. In the process of copying that file off to its permanent home and then restarting, I lost everything.
That is, the original program that ran to the point of allowing my serial console and upload to occur is gone. The program won't boot.
And I can't connect via JTAG and begin to debug. I get: C28xx: Error connecting to the target: (Error -183 @ 0x0) The controller has detected a cable break far-from itself.
I believe I have affected the boot mode. Anybody have an idea how I can reset the part to allow JTAG to function once again? Or if that is even the problem.