Quote:
Originally Posted by neilh
2) Measure the change in time between 2 successive pulses or ticks. Although I haven’t tried this I calculate about 3 ms change in time and I feel this will give lots of noise. Furthermore, I also am worried about CPU usage when throwing interrupts ever 3 ms.
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The RoboRIO can timestamp pulses to about 25ns accuracy (in FPGA hardware, with no CPU overhead). With 3ms between pulses, this is an absolute ton (O(10^-6)) of precision.