frequency estimation using labview fpga

[mangood]

hi member

i want to caculate the frequency of the input ttl signal using lab view fpga

how can i do this??

[crossrulz]

What you want to do is use a Single Cycle Timed Loop to read the signal.  Use a shift register that holds how many cycles have passed since the last rising edge.  On the rising edge, reset the counter and calculate the frequency.  The frequency will be 1/(Numer of Cycles*Cycle Rate).

[mangood]

can you show me the vi plaese>>>???
where i put the counter inside or outside the single loop cycle!!

[crossrulz]

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@mangood wrote:

can you show me the vi plaese>>>???
where i put the counter inside or outside the single loop cycle!!

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I don't have the resources available right now to build this up.  Since you are updating the couter with each cycle, it should be inside of the SCTL.