> Reason for temp variable is for me it's confusing to see statement like > "rate_khz = rate_khz / 1000".
Yes. And with this clearer calculation, we can maybe skip the HZ_PER_KHZ define completely and just use plain '1000' as a factor/divider because it then becomes obvious. I still find the define more confusing than helpful TBH. But I'll leave the final decision to Yicong Yang.
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