Smooth output and round to tenth of degC

git-svn-id: http://moon:8086/svn/projects/HendiControl@200 fda53097-d464-4ada-af97-ba876c37ca34

Control/brewpi/max31865.py

@@ -15,6 +15,7 @@ class Max31865(ATemperatureSensor):
 		self.spi.mode = 0b01
 		self.write_reg(0x00, 0xA3)
 		self.temp_correction = -0.2
+		self.temp = self.__tempRaw()
 
 	def read_reg(self, addr):
 		reg = self.spi.xfer([addr, 0xFF])
@@ -28,14 +29,19 @@ class Max31865(ATemperatureSensor):
 		msb = self.read_reg(0x01)
 		lsb = self.read_reg(0x02)
 		digits = float(256*msb + lsb)/2
+		self.write_reg(0x00, 0xA3)
 
 		return digits
 
 	def temperature(self):
+		self.temp = 0.5*self.temp + 0.5*self.__tempRaw()
+		return round(self.temp, 1)
+
+	def __tempRaw(self):
 		digits = self.read_digits()
 		R = Max31865.calc_R(430, digits)
 		T = Max31865.vanDusen_temp(R) + self.temp_correction
-		print("R={:.3f} Ohm, T={:.2f} degC".format(R, T))
+#		print("R={:.3f} Ohm, T={:.2f} degC".format(R, T))
 		return T
 
 	@staticmethod