Fix bug with endian of config, and add fahrenheit to example.

Author: tdicola

Adafruit_TMP/TMP006.py

@@ -84,7 +84,12 @@ def begin(self, samplerate=CFG_16SAMPLE):
 		self._logger.debug('Using samplerate value: {0:04X}'.format(samplerate))
 		# Set configuration register to turn on chip, enable data ready output,
 		# and start sampling at the specified rate.
-		self._device.write16(TMP006_CONFIG, TMP006_CFG_MODEON | TMP006_CFG_DRDYEN | samplerate)
+		config = TMP006_CFG_MODEON | TMP006_CFG_DRDYEN | samplerate
+		# Flip byte order of config value because write16 uses little endian but we
+		# need big endian here.  This is an ugly hack for now, better to add support
+		# in write16 for explicit endians.
+		config = ((config & 0xFF) << 8) | (config >> 8)
+		self._device.write16(TMP006_CONFIG, config)
 		# Check manufacturer and device ID match expected values.
 		mid = self._device.readU16BE(TMP006_MANID)
 		did = self._device.readU16BE(TMP006_DEVID)

examples/simpletest.py

@@ -29,6 +29,11 @@
 import Adafruit_TMP.TMP006 as TMP006
 
 
+# Define a function to convert celsius to fahrenheit.
+def c_to_f(c):
+		return c * 9.0 / 5.0 + 32.0
+
+
 # Default constructor will use the default I2C address (0x40) and pick a default I2C bus.
 #
 # For the Raspberry Pi this means you should hook up to the only exposed I2C bus
@@ -54,6 +59,8 @@
 # Loop printing measurements every second.
 print 'Press Ctrl-C to quit.'
 while True:
-	print 'Object temperature: {0:0.4F} *C'.format(sensor.readObjTempC())
-	print '   Die temperature: {0:0.4F} *C'.format(sensor.readDieTempC())
+	obj_temp = sensor.readObjTempC()
+	die_temp = sensor.readDieTempC()
+	print 'Object temperature: {0:0.3F}*C / {1:0.3F}*F'.format(obj_temp, c_to_f(obj_temp))
+	print '   Die temperature: {0:0.3F}*C / {1:0.3F}*F'.format(die_temp, c_to_f(die_temp))
 	time.sleep(1.0)