Impossible to vary square wave FREQUENCY output based on a PWM input?

[anon35827816]

@trentonp

Everyone tells me to use the following code with the delay time dependent on my PWM input from the receiver:

Everyone is a moron. Don't listen to him.

@trentonp

HOWEVER, any time I try and use a digital pin as an input, the processor gets tied up and causes a delay following the end of the loop.

Well, there you go.

@trentonp

This type of code works perfectly fine if you are using an analog input

So one solution would be to transform your incoming PWM signal into a DC signal that varies with the duty cycle of the PWM signal. A simple R/C filter may already get you in that direction - in fact, it may be the solution in itself. Give it a try?

@trentonp

I would think that using one of the dedicated timers would be the way to go.

Me too. You could use it to measure the duty cycle of the incoming PWM, provided that the incoming signal is of sufficiently low frequency and your demands on measurement resolution aren't too high. And you could use a timer to generate a PWM signal of adjustable frequency as well. Good thinking!

@trentonp

Does anyone know how I could go about linking a timer to output a specific starting PWM frequency to a digital pin that can be adjusted every 10-20 milliseconds or so based on changes in the input PWM duty cycle from the RC receiver?

Yes, it's quite well documented in the datasheet of common microcontrollers. For instance, if you were to us a classic Arduino Nano or UNO, you'd be looking at the Atmega328P datasheet, which has a few chapters dedicated to the use of Timers, including PWM signal generation.
In addition, if you google 'Arduino pwm timer' I think you'll find something. Part of that 'something' is probably also sets of ready-made libraries that you could use.

So my question to you is, really: given your sound reasoning and good ideas so far, what's holding you back!?