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Add getter and setter for the "Averaging and Sampling Configuration" register #17

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Add getter and setter for the "Averaging and Sampling Configuration" register #17

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Add getter and setter for the "Averaging and Sampling Configuration" …
Jul 29, 2020
608d1d5
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evaherrada Nov 24, 2020
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27 changes: 27 additions & 0 deletions adafruit_cap1188/cap1188.py
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Original file line number Diff line number Diff line change
Expand Up @@ -66,6 +66,7 @@
const(0x17),
)
_CAP1188_SENSITIVTY = const(0x1F)
_CAP1188_AVERAGING = const(0x24)
_CAP1188_CAL_ACTIVATE = const(0x26)
_CAP1188_MULTI_TOUCH_CFG = const(0x2A)
_CAP1188_THESHOLD_1 = const(0x30)
Expand All @@ -77,6 +78,9 @@
# pylint: enable=bad-whitespace

_SENSITIVITY = (128, 64, 32, 16, 8, 4, 2, 1)
_AVG = (1, 2, 4, 8, 16, 32, 64, 128)
_SAMP_TIME = ("320us", "640us", "1.28ms", "2.56ms")
_CYCLE_TIME = ("35ms", "70ms", "105ms", "140ms")


class CAP1188_Channel:
Expand Down Expand Up @@ -171,6 +175,29 @@ def sensitivity(self, value):
new_setting = self._read_register(_CAP1188_SENSITIVTY) & 0x8F | value
self._write_register(_CAP1188_SENSITIVTY, new_setting)

@property
def averaging(self):
"""Triple containing the number of samples taken for each channel,
the sample time, and the cycle time."""
register = self._read_register(_CAP1188_AVERAGING)
avg = _AVG[register >> 4 & 0x07]
samp_time = _SAMP_TIME[register >> 2 & 0x03]
cycle_time = _CYCLE_TIME[register & 0x03]
return (avg, samp_time, cycle_time)

@averaging.setter
def averaging(self, value):
if value[0] not in _AVG:
raise ValueError("Avg must be one of: {}".format(_AVG))
if value[1] not in _SAMP_TIME:
raise ValueError("Sample Time must be one of: {}".format(_SAMP_TIME))
if value[2] not in _CYCLE_TIME:
raise ValueError("Cycle Time must be one of: {}".format(_CYCLE_TIME))
avg = _AVG.index(value[0]) << 4
samp_time = _SAMP_TIME.index(value[1]) << 2
cycle_time = _CYCLE_TIME.index(value[2])
self._write_register(_CAP1188_AVERAGING, avg | samp_time | cycle_time)

@property
def thresholds(self):
"""Touch threshold value for all channels."""
Expand Down