LPC552xx How to calculating program execution time in microseconds ?

[Marconi_]

Dear all,

I'm develping a projetc using LPC55S20 CPU and I need to know the execution time of a routine.

How to calculating program execution time in microseconds ?

Thank you very much for your help and cooperation

best regards.

[EdwinHz]

Hi @Marconi_,

This would be done with the System Tick Timer or Systick. Please look into the code my colleague provided on the following community post: Re: Time elapsed - NXP Community

Just make sure to use the appropriate System Tick Timer, as the LPC55S2x has 3: "Two inside the CPU0 (Secured and Non-Secured), and one inside the CPU1 (Non-Secured)". For more information on how the Systick timer works, please look into Chapter 29 of the LPC55S6x/LPC55S2x/LPC552x User manual. 

BR,
Edwin.