PULSIN for frequency meter?

[Acetronics2]

And now the question; is this achievable using a 16FXXX device and the PBP PULSIN command?

a 16F device running @ 20 Mhz max... so PULSIN will give you 2µs per count.

PBP 16F compiler uses 16 bits ... so, 65535 counts at a maximum


Pulsin will give you a valid result from 1 to 65535 unit +/- 1 count.

@ 50% duty cycle your period can be ... 4 to 131070 µs +/- 4µs


a 16F device running @ 4Mhz ... so PULSIN will give you 10µs per count.

PBP 16F compiler uses 16 bits ... so, 65535 counts at a maximum


Pulsin will give you a valid result from 1 to 65535 unit +/- 1 count.

@ 50% duty cycle your period can be ... 20 to 655350 µs +/- 20µs



from that you can understand what precision and resolution you can get with the PULSIN command.

That's quite simple ...

Alain

PS: Gioppy gave you ... half of the answer !!! LOL