topic Re: Count clock cycles of a particular algorithm in Kinetis Design Studio

Count clock cycles of a particular algorithm

carlostadeoorte — Thu, 11 Jun 2015 21:31:01 GMT

Hello,

I would like to know if any of you know how to count the cycles (or instruction count) executed between 2 breakpoints on KDS?. Alternatively do any of you know if there is a way to know the timestamp between two breakpoints.

Thank you!

-Carlos

Re: Count clock cycles of a particular algorithm

DavidS — Thu, 11 Jun 2015 22:37:12 GMT

Hi Carlos,

Which Kinetis device are you using?

Are you using RTOS? If yes which?

If MQX please review this previous Community Post:

Re: elapsed time in nanoseconds

If baremetal then you could use a PIT timer to is derived from the Peripheral Bus Clock (1/2 the core clock) and start the timer are one breakpoint and stop it at the second breakpoint. Be careful the PIT has not overflown.

Regards,

David

Re: Count clock cycles of a particular algorithm

carlostadeoorte — Fri, 12 Jun 2015 02:30:08 GMT

Thank you, I am using the KL03 baremetal. Using the timers make sense. I was hoping for cycle count, but the timer approach will work as well I guess, I am thinking on counting a few microseconds with a core clock on the 1/2 MHz range, so I think it should not overflow.

Thank you!

-Carlos