Zero crossing time measurement

I want to measure the time interval between every zero crossings for 5V AC input signal using the PIC16f877a.
I understand c programming but I am struggling to measure the time interval between every zero crossings. I did google search and found that I have to use Analog Comparator, Interrupt and CCP Module.

How to detect every zero crossing ?

if crossing detect then how to measure time ?

You asked this question a month ago. Give more information.

Mike.

Pommie said:

You asked this question a month ago. Give more information.

Mike.

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Please tell me What information you want ? I want to measure the time interval between every zero crossings for 5V AC input signal using the PIC16f877a.

Read your last thread on this.

Mike.