Interfacing a digital compass with the RC

[Qbranch]

Originally Posted by Dave Flowerday

As for reading the PWM input, sometimes you can take the PWM output and run it through a simple RC circuit to convert it to an analog value that you could read directly with the RC.

Give me a pwm signal, a timer (internal peripheral) and an external interrupt (portb) and i'll time you a pulse...

Have had to do this this year and in the past for getting distance data out of an ultrasonic sensor...

-q

[Kelly]

How hard is that?

[Qbranch]

Algorithm wise its easy peasy. Hardware wise, you'll need to know how to use interrupts, and how to use a hardware timer... nothing too bad.

If you'd like to try, i'll write up how you do it, just don't want to take the time to write it till i'm sure somebody needs it. (call me lazy )

-q

[Dave Flowerday]

Originally Posted by Qbranch

Give me a pwm signal, a timer (internal peripheral) and an external interrupt (portb) and i'll time you a pulse...

Yes, that's not hard to do at all. I was simply offering a potential alternative solution in case the original poster isn't comfortable using timer interrupts and such. Occasionally things which seem most obvious to one person can be very daunting to another.