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auto_convert: set/unset bias, + use in read_rtd #32

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Merged
merged 1 commit into from
Jan 17, 2022
Merged

auto_convert: set/unset bias, + use in read_rtd #32

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7 changes: 7 additions & 0 deletions adafruit_max31865.py
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Original file line number Diff line number Diff line change
Expand Up @@ -204,8 +204,10 @@ def auto_convert(self, val):
config = self._read_u8(_MAX31865_CONFIG_REG)
if val:
config |= _MAX31865_CONFIG_MODEAUTO # Enable auto convert.
config |= _MAX31865_CONFIG_BIAS # Enable bias.
else:
config &= ~_MAX31865_CONFIG_MODEAUTO # Disable auto convert.
config &= ~_MAX31865_CONFIG_BIAS # Disable bias.
self._write_u8(_MAX31865_CONFIG_REG, config)

@property
Expand Down Expand Up @@ -243,6 +245,11 @@ def read_rtd(self):
nominal value of the resistance-to-digital conversion and some math. If you just want
temperature use the temperature property instead.
"""
if self.auto_convert:
rtd = self._read_u16(_MAX31865_RTDMSB_REG)
if not rtd & 1:
rtd >>= 1
return rtd
self.clear_faults()
self.bias = True
time.sleep(0.01)
Expand Down