David Cowan

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9 years, 3 months ago.

Count frequencies using interuptin

I am hoping to use the interruptin function to count pulses (I'm using either the FRDM KL25Z or the NUCLEO-L152RE) I was wondering what the maximum pulse frequency I might expect to achieve using code similar to that posted on the site.

I am hoping to count up to 500000 pulses/s.

Thanks,

David Cowan

Question relating to:

Last updated: 30 Apr 2020

2 Answers

Martin Kojtal
9 years, 3 months ago.

Please read this, https://developer.mbed.org/forum/mbed/topic/2538/ where you can find a link to a post here on the forum, with some explanations.

Erik -
9 years, 3 months ago.

By far the best method is to use a timer capture input/timer with clock from external pin, although the mbed library does not support this, so you will need to write the code yourself (or search if someone else already did).