topic CW10.4 breakpoints not working...? in CodeWarrior for MCU

CW10.4 breakpoints not working...?

KeithL — Tue, 02 Jul 2013 17:26:26 GMT

I'm using CW10.4 on WinXP. I have a project that uses a K10 72 MHz variant. When I initiate a debug session, I can set a breakpoint, and it will work *once*. After that, it seems to be ignored - even though the symbol and checkmark in the margin of the editor window remain. I'm debugging the code in flash, so, I'm using a hardware breakpoint. I only have one set (I know the limit is 4). The connection to the system is a P&E multilink universal USB. Does anyone have any ideas?

This may or may not be related to the above problem, but, I notice that when I add global variables to the variable window, they are disabled by default. When I right click on one them, the "enable" checkbox is checked, and when I *un-check* it, the variable appears! Just the opposite of the behavior I'd expect...

All of these things seemed to work fine on my previous project using a K40 processor and CW10.1. Maybe these are issues with the K10...?

Thanks,

Keith

Re: CW10.4 breakpoints not working...?

KeithL — Tue, 02 Jul 2013 21:01:00 GMT

Well - looks like a rookie mistake on my part. The code where my breakpoint was set was truly never getting executed. Forgot to declare a certain variable "volatile" and so the compiler optimized that section of code out. Didn't see what was going on 'til I looked at the disassembler window and tried to follow it there...

Re: CW10.4 breakpoints not working...?

trytohelp — Wed, 03 Jul 2013 06:01:11 GMT

Hi Keith,

Under some condition in your application, the compiler and linker could optimize some part of your application.

For the variables, moving a variable as global could be enough to avoid optimization.

However in some case the volatile keyword is required too.

Regards

Pascal

Re: CW10.4 breakpoints not working...?

KeithL — Wed, 03 Jul 2013 13:49:42 GMT

Thanks, Pascal - I hadn't thought of that angle...

Keith