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XMEGA 32bit frequency capture

 
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boeseturbo

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Joined: 23 Jul 2007
Posts: 46

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PostPosted: Thu May 16, 2019 1:04 pm    Post subject: XMEGA 32bit frequency capture Reply with quote
Hey friends,

I want to build a frequency-meter. I have a triggerwheel with 20 teeth on it and this can have a rotating speed of 4000RPM.

I see now I can put 2 timers at xmega together to one 32bit timer.

I want to use frequency capture on this timer. Do I understand it right, that the value in the register is the time between two rising edges? So the register
will be refreshed every next tooth on trigger-wheel?

Did anybody have a code to make it working? I did not make much with xmega yet, but I remember, that timer-config is not a basic thing, maybe
anybody can help with it Smile

Than I can give out frequency every 10ms over uart Smile

Cheers

Boese

(BASCOM-AVR version : 2.0.8.1 )
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MWS

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Joined: 22 Aug 2009
Posts: 2262

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PostPosted: Fri May 17, 2019 10:54 am    Post subject: Reply with quote
http://ww1.microchip.com/downloads/en/AppNotes/doc8045.pdf
Page 13 and 15.
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