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Originally Posted by JefferMC
According the the documentation, the FPGA is only used when the counter type is set to k4x, not for k2x and/or k1x.
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What documentation are you referring to?
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I seem to recall that the PID classes wanted an Encoder and would not accept a Counter. I may be wrong about that.
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Many teams are successfully using home-brew one-count-per-rev counters on their one-directional shooter wheels. Also, PID is not the only game in town.
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I never found that the handling the second channel caused an appreciable issue for the cRIO.
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Perhaps you did but didn't realize it:
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Originally Posted by JefferMC
we were forced to use a 360 CPR encoder to attempt to measure our shooting wheel. We exceeded the CPR limit.
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However, the point is well taken that it is extra interrupts and unneeded effort.
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There are no interrupts involved. The FPGA polls the DIO at ~153KHz