CCS/AWR1642BOOST: Consistently getting exception thrown on boot

Tool/software: Code Composer Studio

Hi,

I'm attempting to modify the mmw demo project from version 2.0.0.4 of the mmwave_sdk (I couldn't get the demo from the LTS version 2.1.0.4 to work), and am having trouble debugging my code.

I've flashed the xwr16xx_ccsdebug.bin binary using the cloud uniflash tool.

The first run after a hard reset leaves the instructon pointer at the first line of main, however breakpoints don't seem to be working. After this any further attempts to debug result in a thrown exception as reported in the console:

Exception occurred in ThreadType_Task.
Task handle: 0x800cef8.
Task stack base: 0x800b000.
Task stack size: 0x800.
R0 = 0x00000000  R8  = 0xffffffff
R1 = 0x00000000  R9  = 0xffffffff
R2 = 0x00000000  R10 = 0xffffffff
R3 = 0x00000000  R11 = 0xffffffff
R4 = 0x00000000  R12 = 0x0000215d
R5 = 0x0000a6d8  SP(R13) = 0x0800b7d0
R6 = 0xffffffff  LR(R14) = 0x00007e6c
R7 = 0xffffffff  PC(R15) = 0x00006b7c
PSR = 0x400c019f
DFSR = 0x00000000  IFSR = 0x00000000
DFAR = 0x00000000  IFAR = 0x00000000
ti.sysbios.family.arm.exc.Exception: line 209: E_undefinedInstruction: pc = 0x00006b7c, lr = 0x00007e6c.
xdc.runtime.Error.raise: terminating execution

If I restart the processor then I get the same error, however if I reset the CPU and then resume then the code executes but once again no breakpoints work.

This behaviour is intermittent, occasionally I'll be in a situation where the debugging works as expected (though often it requries two clicks on the debug button to execute), but a few code changes later and we're back in the non-working situation again.

I'm using CCSv9.

Any thoughts?

Rob