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BMP085 pressure calculation #13

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BMP085 pressure calculation #13

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5 changes: 3 additions & 2 deletions sensors/bmpBackend.py
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Original file line number Diff line number Diff line change
Expand Up @@ -167,6 +167,7 @@ def readPressure(self):
UP = 23843
self._cal_AC6 = 23153
self._cal_AC5 = 32757
self._cal_MB = -32767
self._cal_MC = -8711
self._cal_MD = 2868
self._cal_B1 = 6190
Expand All @@ -191,7 +192,7 @@ def readPressure(self):

# Pressure Calculations
B6 = B5 - 4000
X1 = (self._cal_B2 * (B6 * B6) >> 12) >> 11
X1 = (self._cal_B2 * ((B6 * B6) >> 12)) >> 11
X2 = (self._cal_AC2 * B6) >> 11
X3 = X1 + X2
B3 = (((self._cal_AC1 * 4 + X3) << self.mode) + 2) / 4
Expand Down Expand Up @@ -219,7 +220,7 @@ def readPressure(self):

X1 = (p >> 8) * (p >> 8)
X1 = (X1 * 3038) >> 16
X2 = (-7375 * p) >> 16
X2 = (-7357 * p) >> 16
if (self.debug):
print "DBG: p = %d" % (p)
print "DBG: X1 = %d" % (X1)
Expand Down