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remove dependency on chrono module #3

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remove dependency on chrono module #3

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5 changes: 2 additions & 3 deletions VL53L0X.py
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Original file line number Diff line number Diff line change
Expand Up @@ -636,11 +636,10 @@ def set_measurement_timing_budget(self, budget_us):
return True

def perform_single_ref_calibration(self, vhv_init_byte):
chrono = Timer.Chrono()
self._register(SYSRANGE_START, 0x01|vhv_init_byte)
chrono.start()
startTime = utime.ticks_ms()
while self._register((RESULT_INTERRUPT_STATUS & 0x07) == 0):
time_elapsed = chrono.read_ms()
time_elapsed = utime.ticks_diff(utime.ticks_ms(), startTime)
if time_elapsed > _IO_TIMEOUT:
return False
self._register(SYSTEM_INTERRUPT_CLEAR, 0x01)
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