Quote:
Originally Posted by Ron Nielsen
I think I understand the difference between PWM signals and PPM signals, how are PPM signals different from DIO? Is PPM a sub type of DIO? Can the NI RoboReo read PPM signals?
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Pulse Width Modulation (PWM) is not the same thing as Pulse Position Modulation. As the names imply, PWM varies the width of the pulse to effect a change in a motor. PPM varies the position of a pulse within a periodic frame. Both are examples of digital signals but Digital Input/Output (DIO) is a general form of digital interfaces. The PWM and PPM type signals require internal processing of the DIO signals. This is what the Field Programmable Gate Array (FPGA) does for a living.
As far as I know, PPM is not programmed into the RoboRIO's FPGA.