Half of my lines of code are not accessible to the debugger

[brianreinhold]

I am using Keil and trying to debug one of the examples in nrf_SDK_12.3.0 and half of the lines are not accessible in line by line debugging. Those lines where one can set break points are highlighted by a darker gray in the far left column. Some lines I can set break points on, but half of them I cannot. When stepping through the code those un-highlighted lines are just skipped.

I have never seen that before. How does this happen and why?

[Jørgen Holmefjord]

Hi,

Most likely the code is optimized away by the compiler. You can change the optimization in your project settings. Setting it to Level 0 (-O0) should disable all optimization.

Best regards,
Jørgen

[brianreinhold]

Thank you - that was it. Thought was it but I just couldn't find where to turn it off!