Measure code execution time on ARM Cortex-M0 using KDS

[rafaalvescomp11]

Good night,

I am using the Freedom KL25Z platform and the Kinetis Design Studio (KDS) software.

How can I measure code execution time in KDS?

Agradeço desde já,

Rafael

[jingpan]

Hi rafaalvescomp11,

KDS hasn't this function. You use systick to count time or use gpio and oscillator to monitor.

Rregards,

Jing

[rafaalvescomp11]

Good afternoon,

I used a Systick, configured and programmed the Systick according to the images below and the current countdown value was 2410470, how do I convert this value to the execution time?

[jingpan]

Hi,

Systick clock frequency is equal to core clock frequency. For example, if the core run at 48M, the total time is 2410470/48M.

Regards,

Jing

[rafaalvescomp11]

Hi Jing,

Dividing 2410470 by 20.97152M which is the system clock I get as a result 0.11 seconds, but wouldn't the execution time of the attached example have to be close to 5s?

Regards,

Rafael 

[rafaalvescomp11]

Hi jingpan,

Thank you.