frequency out BS2

hippalator

Is there a way to have the freqout to be constant?
The whats a microcontroller doesnt say if the freqout can remain constaint. It shows only a fre / duration.
Will a do loop command work or will there be a pause using this method?

PJAllen

"Will a do loop command work or will there be a pause using this method?"

Plug it in and find out.· How hard is that?

irkris77

if you dont know just say so. no reason to be impolite

NWCCTV

I agree. PJ, That was quite rude. Many people (myself included) are new to this kind of thing and would rather ask before doing something that could maybe ruin expensive parts, etc.

hippalator

Yea considering I was at work when I posted the message. Really kind of hard to plug it in and test when you are not home to plug it in and test. But anyway it doesnt matter.
My next question is the freq a sine wave or what?
Is a pulsout a square wave? If so, I can easily run the sig through a butterworth 6th order filter I have laying around to get the sinewave.

Tracy Allen

The FREQOUT has a duration up to 65535 milliseconds, so for some purposes that would be "constant". If FREQOUT is in a loop, there will be about one millisecond of pause between one duration and the next. Keep in mind that the PBASIC program can't be doing anything else while it executes one duration. If you make the duration relatively short so that it executes frequently, say 20 or 200 times per second, you can hear the pauses as a sub-frequency that might remind you of a cricket or a motorboat.

FREQOUT produces a sine wave made by varying pulse frequency modulation. That is, it is made of pulses that go from 0 to 5 volts at a much higher frequency, and the density of the pulses is a good sine wave. A low-pass filter will remove the high frequency and leave the sine wave.

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Tracy Allen
www.emesystems.com

hippalator

Thanks Tracy