Topic : how many microseconds take a ISR ? is there a way to show it in RIDE7?

Forum : ARM

Original Post
Post Information Post
May 12, 2011 - 8:24pm

I want to know how many microseconds my Interrupt Service Routine takes

Is there a way RIDE7 shows it to me ?

Post Information Post
May 13, 2011 - 10:17am
Raisonance Support Team


The easiest way is to activate a LED upon entry of the ISR and reset it upon exit, then use your favorite oscilloscope to measure the execution time.

Another way is to use the cycle counters if you are using a Cortex-M3 chip. Please refer to for details.

Best Regards,