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simplify ADC readings

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This commit is contained in:
Zach Richard 2022-04-25 20:23:24 -04:00 committed by Kyle Brown
parent 8208194842
commit f119678ec7
1 changed files with 4 additions and 17 deletions
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21
kmk/modules/potentiometer.py
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@ -11,8 +11,6 @@ class BasePotentiometer:
self._direction = None
self._pos = 0
self._timestamp = ticks_ms()
self._truncate_bits = 6
# callback function on events. Needs to be defined externally
self.on_move_do = None
@ -24,21 +22,10 @@ class BasePotentiometer:
}
def get_pos(self):
# Debounce...
# AnalogRead always reports 16 bit values - truncate to 6 to de-noise
# convert to percentage and round to quarter of a percent
readings = [(self.read_pin.value >> (16 - self._truncate_bits)) for i in range(3)]
reading = sum(readings) / len(readings)
# reading = self.read_pin.value >> 10
dec_val = reading / (pow(2, self._truncate_bits) - 1)
# new_pos = round(dec_val * 4, 1) / 4
new_pos = round(dec_val, 2)
return int(new_pos * 127)
"""Read from the analog pin assingned, truncate to 7 bits,
average over 10 readings, and return a value 0-127
"""
return int(sum([(self.read_pin.value >> 9) for i in range(10)]) / 10)
def update_state(self):
self._direction = 0