Configure TCC of SAML21J18B in capture mode

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Hi All,


I have to measure the frequency of Square wave which is varying from 125KHz to 150KHz. This square wave is fed at pin-39 (TCC0/WO[4]) of SAML21J18B micro-controller. Can anyone please guide me as how to configure TCC0 in Capture mode so as to calculate the exact frequency of the square wave ?