MSP430FR2355

Hadi Eskandari

Other Parts Discussed in Thread: MSP430FR2355, MSP430FR5994

Dear all
I am using to MSP430FR2355, Now, I'm planning to measure frequency from one pin in one application.
How can I found it?
I couldn't find example code for this work.

Best Regards
Hadi

over 4 years ago

+1 Keith Barkley over 4 years ago

Guru 42205 points

You won't since this is extremely application specific.

If this is a square wave that goes from 0 to Vdd, you can probably use a port interrupt and timer to capture the on/off transitions.

If this is a sine wave, you might need some sort of zero crossing detector or an FFT.

If this is an arbitrary waveform, you really need an FFT.

+1 Mike_H over 4 years ago

Intellectual 305 points

I agree with Keith. The MSP430FR5994 has a low energy accelerator that will calculate the FFT for you. Example code in MSPWare. Can be acquired as an inexpensive Launchpad dev board.

0 Hadi Eskandari over 4 years ago in reply to Keith Barkley

Prodigy 110 points

Dear Keith

Thank you for your reply and consideration.

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MSP430FR2355