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How measure frequency of signals other than squarewaves with timer capture?

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jmur

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Im using timer capture on an lpc2106 to measure frequency of signals by basically counting the number of rising edges captured in 1 second. This works fine for squarewaves but not for any other signal types.
Is there way to measure the frequency of other wave types with timer capture?

Regards,
J
 
*Sounds* easy, I would need a circuit though that can output a square for a square, triangle, rampup or rampdown input, is this possible what kind of circuit would you suggest? maybe a comparator would do the job?
Regards,
J
 
Last edited:
I used a lm358 as a noninverting comparator with vref set at 50% of the input vpp, works fine.
Regards,
j
 
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