Quote Originally Posted by rmteo View Post
the abovementioned PIC24 is <$2) and will outperform anything that can be done in software.
Agreed, that is a very fast chip, but I always get an error programing PIC24F's with PBP code.

The PIC18 devices have a hardware multiplier, so that is ultimately where I am going with this. The pulse width is being sensed with a CCP1 capture, which is hardware. But the 12F needs a tiny bit of assembly to control that hardware. The PIC18F2431 has more hardware that lends itself better (than the 12F and 16F) to that sort of thing.

Right now I'm working a flybarless controller which needs to take inputs from a receiver, inputs from 3 axis accelerometers, do the necessary math intensive (mostly word) computations, then output pulses to the CCPM servos. The pulses should be output concurrently and this is where the hardware PWM becomes really important.
I really don't know what flybarless is vs flybraless, but seriously, that sounds very cool! I would love to see your code for that, and I am sure others would as well.

But with RC working at 50 hertz, how quick do you REALLY need the chip to be? That is a lot of time to do some math, at least for most applications.