@@ -71,6 +71,7 @@ class tmp102:

         if self.debugMode:

             # Read the TMP102 configuration register.

             data = self.getInfo()

+            print(self)

             print("configuration register: %s %s\n" % data)

     ## end def

@@ -57,17 +57,25 @@ class tmp102:

     # register.

     def __init__(self, sAddr=DEFAULT_BUS_ADDRESS,

                  sbus=DEFAULT_BUS_NUMBER,

-                 config=DEFAULT_CONFIG): 

+                 config=DEFAULT_CONFIG,

+                 debug=False): 

         # Instantiate a smbus object

         self.sensorAddr = sAddr

         self.bus = smbus.SMBus(sbus)

+        self.debugMode = debug

+ 

         # Initialize TMP102 sensor.  

         initData = [(config >> 8), (config & 0x00FF)]

         self.bus.write_i2c_block_data(self.sensorAddr, CONFIG_REG, initData)

+

+        if self.debugMode:

+            # Read the TMP102 configuration register.

+            data = self.getInfo()

+            print("configuration register: %s %s\n" % data)

     ## end def

     # Reads the configuration register (two bytes).

-    def status(self):

+    def getInfo(self):

         # Read configuration data

         config = self.bus.read_i2c_block_data(self.sensorAddr, CONFIG_REG, 2)

         configB1 = format(config[0], "08b")

@@ -99,6 +107,12 @@ class tmp102:

         # The temperature is returned in d11-d0, a two's complement,

         # 12 bit number.  This means that d11 is the sign bit.

         data=self.bus.read_i2c_block_data(self.sensorAddr, TEMP_REG, 2)

+

+        if self.debugMode:

+            dataB1 = format(data[0], "08b")

+            dataB2 = format(data[1], "08b")

+            print("Temperature Reg: %s %s" % (dataB1, dataB2))

+

         # Format into a 12 bit word.

         bData = ( data[0] << 8 | data[1] ) >> 4

         # Convert from two's complement to integer.

@@ -121,24 +135,18 @@ class tmp102:

 def testclass():

     # Initialize the smbus and TMP102 sensor.

-    ts1 = tmp102(0x48, 1)

-    # Read the TMP102 configuration register.

-    data = ts1.status()

-    print "configuration register: %s %s\n" % data

+    ts1 = tmp102(0x48, 1, debug=True)

     # Print out sensor values.

     bAl = False

     while True:

-        regdata = ts1.getTempReg()

         tempC = ts1.getTempC()

         tempF = ts1.getTempF()

         if bAl:

             bAl = False

-            print("\033[42;30mTemperature Reg: %s %s\033[m" % regdata)

-            print("\033[42;30m%6.2f%sC  %6.2f%s                 \033[m" % \

+            print("\033[42;30m%6.2f%sC  %6.2f%sF                 \033[m" % \

                   (tempC, DEGSYM, tempF, DEGSYM))

         else:

             bAl = True

-            print("Temperature Reg: %s %s" % regdata)

             print("%6.2f%sC  %6.2f%sF" % \

                   (tempC, DEGSYM, tempF, DEGSYM))

         time.sleep(2)

@@ -1,4 +1,4 @@

-#!/usr/bin/python

+#!/usr/bin/python2

 #

 # Module: tmp102.py

 #

@@ -31,12 +31,23 @@ import smbus

 import time

 # Define constants

-DEGSYM = u'\xb0'

+DEGSYM = u'\xB0'

 # Define TMP102 Device Registers

 CONFIG_REG = 0x1

 TEMP_REG = 0x0

+# Define default sm bus address.

+DEFAULT_BUS_ADDRESS = 0x48

+DEFAULT_BUS_NUMBER = 1

+

+# Define the default sensor configuration.  See the TMP102 data sheet

+# for meaning of each bit.  The following bytes are written to the

+# configuration register

+#     byte 1: 01100000

+#     byte 2: 10100000

+DEFAULT_CONFIG = 0x60A0

+

 class tmp102:

     # Initialize the TMP102 sensor at the supplied address (default

@@ -44,16 +55,14 @@ class tmp102:

     # a new SMBus object for each instance of this class.  Writes

     # configuration data (two bytes) to the TMP102 configuration

     # register.

-    def __init__(self, sAddr=0x48, sbus=1): 

+    def __init__(self, sAddr=DEFAULT_BUS_ADDRESS,

+                 sbus=DEFAULT_BUS_NUMBER,

+                 config=DEFAULT_CONFIG): 

         # Instantiate a smbus object

         self.sensorAddr = sAddr

         self.bus = smbus.SMBus(sbus)

-        # Initialize TMP102 sensor.  See the data sheet for meaning of

-        # each bit.  The following bytes are written to the configuration

-        # register

-        #     byte 1: 01100000

-        #     byte 2: 10100000

-        initData = [0x60, 0xA0]

+        # Initialize TMP102 sensor.  

+        initData = [(config >> 8), (config & 0x00FF)]

         self.bus.write_i2c_block_data(self.sensorAddr, CONFIG_REG, initData)

     ## end def

@@ -95,7 +104,7 @@ class tmp102:

         # Convert from two's complement to integer.

         # If d11 is 1, the the number is a negative two's complement

         # number.  The absolute value is 2^12 - 1 minus the value

-        # of d10-d0 taken as a positive number.

+        # of d11-d0 taken as a positive number.

         if bData > 0x7FF:  # all greater values are negative numbers

             bData = -(0xFFF - bData)  # 0xFFF is 2^12 - 1

         # convert integer data to Celsius

@@ -124,14 +133,14 @@ def testclass():

         tempF = ts1.getTempF()

         if bAl:

             bAl = False

-            print "\033[42;30mTemperature Reg: %s %s\033[m" % regdata

-            print "\033[42;30m%6.2f%sC  %6.2f%s                 \033[m" % \

-                  (tempC, DEGSYM, tempF, DEGSYM)

+            print("\033[42;30mTemperature Reg: %s %s\033[m" % regdata)

+            print("\033[42;30m%6.2f%sC  %6.2f%s                 \033[m" % \

+                  (tempC, DEGSYM, tempF, DEGSYM))

         else:

             bAl = True

-            print "Temperature Reg: %s %s" % regdata

-            print "%6.2f%sC  %6.2f%sF" % \

-                  (tempC, DEGSYM, tempF, DEGSYM)

+            print("Temperature Reg: %s %s" % regdata)

+            print("%6.2f%sC  %6.2f%sF" % \

+                  (tempC, DEGSYM, tempF, DEGSYM))

         time.sleep(2)

     ## end while

 ## end def

old mode 100644

new mode 100755

@@ -66,6 +66,15 @@ class tmp102:

         return (configB1, configB2)

     ## end def

+    def getTempReg(self):

+        # Read temperature register and return raw binary data for test

+        # and debug.

+        data = self.bus.read_i2c_block_data(self.sensorAddr, TEMP_REG, 2)

+        dataB1 = format(data[0], "08b")

+        dataB2 = format(data[1], "08b")

+        return (dataB1, dataB2)

+    ## end def

+

     # Gets the temperature in binary format and converts to degrees

     # Celsius.

     def getTempC(self):

@@ -110,14 +119,17 @@ def testclass():

     # Print out sensor values.

     bAl = False

     while True:

+        regdata = ts1.getTempReg()

         tempC = ts1.getTempC()

         tempF = ts1.getTempF()

         if bAl:

             bAl = False

-            print "\033[42;30m%6.2f%sC  %6.2f%sF\033[m" % \

+            print "\033[42;30mTemperature Reg: %s %s\033[m" % regdata

+            print "\033[42;30m%6.2f%sC  %6.2f%s                 \033[m" % \

                   (tempC, DEGSYM, tempF, DEGSYM)

         else:

             bAl = True

+            print "Temperature Reg: %s %s" % regdata

             print "%6.2f%sC  %6.2f%sF" % \

                   (tempC, DEGSYM, tempF, DEGSYM)

         time.sleep(2)

new file mode 100644

@@ -0,0 +1,129 @@

+#!/usr/bin/python

+#

+# Module: tmp102.py

+#

+# Description: This module acts as an interface between the TMP102 sensor

+# and downstream applications that use the data.  Class methods get

+# temperature data from the TMP102 sensor. It acts as a library module that

+# can be imported into and called from other Python programs.

+#

+# Copyright 2021 Jeff Owrey

+#    This program is free software: you can redistribute it and/or modify

+#    it under the terms of the GNU General Public License as published by

+#    the Free Software Foundation, either version 3 of the License, or

+#    (at your option) any later version.

+#

+#    This program is distributed in the hope that it will be useful,

+#    but WITHOUT ANY WARRANTY; without even the implied warranty of

+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

+#    GNU General Public License for more details.

+#

+#    You should have received a copy of the GNU General Public License

+#    along with this program.  If not, see http://www.gnu.org/license.

+#

+# Revision History

+#   * v10 released 01 June 2021 by J L Owrey; first release

+#

+#2345678901234567890123456789012345678901234567890123456789012345678901234567890

+

+# Import the I2C interface library

+import smbus

+import time

+

+# Define constants

+DEGSYM = u'\xb0'

+

+# Define TMP102 Device Registers

+CONFIG_REG = 0x1

+TEMP_REG = 0x0

+

+class tmp102:

+

+    # Initialize the TMP102 sensor at the supplied address (default

+    # address is 0x48), and supplied bus (default is 1).  Creates

+    # a new SMBus object for each instance of this class.  Writes

+    # configuration data (two bytes) to the TMP102 configuration

+    # register.

+    def __init__(self, sAddr=0x48, sbus=1): 

+        # Instantiate a smbus object

+        self.sensorAddr = sAddr

+        self.bus = smbus.SMBus(sbus)

+        # Initialize TMP102 sensor.  See the data sheet for meaning of

+        # each bit.  The following bytes are written to the configuration

+        # register

+        #     byte 1: 01100000

+        #     byte 2: 10100000

+        initData = [0x60, 0xA0]

+        self.bus.write_i2c_block_data(self.sensorAddr, CONFIG_REG, initData)

+    ## end def

+

+    # Reads the configuration register (two bytes).

+    def status(self):

+        # Read configuration data

+        config = self.bus.read_i2c_block_data(self.sensorAddr, CONFIG_REG, 2)

+        configB1 = format(config[0], "08b")

+        configB2 = format(config[1], "08b")

+        return (configB1, configB2)

+    ## end def

+

+    # Gets the temperature in binary format and converts to degrees

+    # Celsius.

+    def getTempC(self):

+        # Get temperature data from the sensor.

+        # TMP102 returns the data in two bytes formatted as follows

+        #        -------------------------------------------------

+        #    bit | b7  | b6  | b5  | b4  | b3  | b2  | b1  | b0  |

+        #        -------------------------------------------------

+        # byte 1 | d11 | d10 | d9  | d8  | d7  | d6  | d5  | d4  |

+        #        -------------------------------------------------

+        # byte 2 | d3  | d2  | d1  | d0  | 0   |  0  |  0  |  0  |

+        #        -------------------------------------------------

+        # The temperature is returned in d11-d0, a two's complement,

+        # 12 bit number.  This means that d11 is the sign bit.

+        data=self.bus.read_i2c_block_data(self.sensorAddr, TEMP_REG, 2)

+        # Format into a 12 bit word.

+        bData = ( data[0] << 8 | data[1] ) >> 4

+        # Convert from two's complement to integer.

+        # If d11 is 1, the the number is a negative two's complement

+        # number.  The absolute value is 2^12 - 1 minus the value

+        # of d10-d0 taken as a positive number.

+        if bData > 0x7FF:  # all greater values are negative numbers

+            bData = -(0xFFF - bData)  # 0xFFF is 2^12 - 1

+        # convert integer data to Celsius

+        tempC = bData * 0.0625 # LSB is 0.0625 deg Celsius

+        return tempC

+    ## end def

+

+    def getTempF(self):

+        # Convert Celsius to Fahrenheit using standard formula.

+        tempF = (9./5.) * self.getTempC() + 32.

+        return tempF

+    ## end def

+## end class

+

+def testclass():

+    # Initialize the smbus and TMP102 sensor.

+    ts1 = tmp102(0x48, 1)

+    # Read the TMP102 configuration register.

+    data = ts1.status()

+    print "configuration register: %s %s\n" % data

+    # Print out sensor values.

+    bAl = False

+    while True:

+        tempC = ts1.getTempC()

+        tempF = ts1.getTempF()

+        if bAl:

+            bAl = False

+            print "\033[42;30m%6.2f%sC  %6.2f%sF\033[m" % \

+                  (tempC, DEGSYM, tempF, DEGSYM)

+        else:

+            bAl = True

+            print "%6.2f%sC  %6.2f%sF" % \

+                  (tempC, DEGSYM, tempF, DEGSYM)

+        time.sleep(2)

+    ## end while

+## end def

+

+if __name__ == '__main__':

+    testclass()

+