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pololu / vl53l0x-arduino

Pololu Arduino library for VL53L0X time-of-flight distance sensor
https://www.pololu.com/product/2490
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Request for a comment explaining why 1910 was changed to 1320 in setMeasurementTimingBudget #19

Closed ssilverman closed 5 years ago

ssilverman commented 6 years ago

https://github.com/pololu/vl53l0x-arduino/blob/22d997afc59625d14c3940d54dfd6d1800efa627/VL53L0X.cpp#L427

Would you mind adding a comment explaining why this value was changed from 1910?

kevin-pololu commented 6 years ago

I originally wrote this library based on version 1.0.0 of ST's API, where the corresponding definition in VL53L0X_set_measurement_timing_budget_micro_seconds() uses the same value (line 1118 of vl53l0x_api_core.c): uint32_t StartOverheadMicroSeconds = 1320;

At the time, I noticed it was different than the the value 1910 used in VL53L0X_get_measurement_timing_budget_micro_seconds() and made a note of it in the comment for the line you noted above. It is interesting that the value has been changed to 1910 in version 1.0.2; I wonder if this was a mistake in the earlier versions of the API. It would probably be a good idea for me to take a look at what changed between API version 1.0.0 and the current 1.0.2 and update our library to match.