Add watchpoint to stackpointer

[simonwyss]

I would like to add a watchpoint to the stackpointer to monitor the maximum level of the stack.

The following solution didn't work for me (LPCXpresso 8.2.2, Hardware LPC54102):
How to use Watchpoints 
I can attach watchpoints to variables but not to the CPU registers.

1. Add Watch for Stack Pointer:

2. Want to add Watchpoint, didn't work! - No option for "Add Watchpoint"

Add Watchpoint works for Variables:

[converse · Accepted solution]

It is not possible to watch registers on Cortex-M cpus.

this thread may be of interest

https://community.nxp.com/thread/428355 

[simonwyss]

Thank you for your response.

I already saw the article Monitoring Stack Size 
This works for me.

However, I was mislead by the article How to use Watchpoints 

This article documents that it should be possible to use Watchpoints on the Stackpointer on ARM CPUs !!!

[converse]

It doesn't say that at all.

The document states "Since watchpoint 'watch' access to memory...". I.e. It works on memory. So this example is watching a write to address 0x10007D000. I guess they chose this address in case the stack grows that large.

[simonwyss]

Thank you for your explanation.
Now I understand how this mechanism works!