BasicMicro - Forums

I have a single line coming to the chip. I need to beable to not only count the number of pulses, but the frequency of them.
I see ways to get the freq and ways to get the count, but not at the same time.
The counter could hit the int pin and run a routine to count the pulse.
I couls also start a counter and count between the pulses for the freq.
But. One will interfer with the other.
Any way I can accomplish both at the same time?

I am trying to work out how to build a digital spedometer with Odometer.

Hello, juliemac.
Basically, pulse count is done over a set time period. Do this over a one second interval and now you have both the count and frequency. If you get 117 pulses in your one second period, you have a frequency of 117 Herz (cycles per second). If you need a more frequent update than once per second, then do the sampling in a tenth second interval and multiply the count by 10 to arrive at a slightly less accurate frequency.
Of course you'll have to use interrupts to get a time interval larger than a few milliseconds. BASIC interrupts for Nanos aren't supported in Studio, just Pro parts. You'll have to search the forums for how to do this in assembly for Atom parts, which also applies to Nanos (Or buy a Pro One-M). The examples are there.
Take care.

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