Revision 0:640bac35614f, committed 2016-01-25

Comitter:

dwijaybane

Date:

Mon Jan 25 10:59:27 2016 +0000

Commit message:

TMP102 I2C based Temperature Sensor Library Created

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TMP102.cpp	Mon Jan 25 10:59:27 2016 +0000
@@ -0,0 +1,65 @@
+/* Copyright (C) 2016,Edutech IoT Team, mbed.org, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "TMP102.h"
+
+#define TEMP_REG_ADDR 0x00
+
+TMP102::TMP102(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr)
+{
+
+}
+
+TMP102::~TMP102()
+{
+
+}
+
+
+float TMP102::read_12b()
+{
+  const char tempRegAddr = TEMP_REG_ADDR;
+
+  m_i2c.write(m_addr, &tempRegAddr, 1); //Pointer to the temperature register
+
+  char reg[2] = {0,0};
+  m_i2c.read(m_addr, reg, 2); //Rea
+
+  int16_t res  = ((int8_t)reg[0] << 4) | ((uint8_t)reg[1] >> 4);
+
+  float temp =  (float) ((float)res * 0.0625);
+
+  return temp;
+}
+
+
+float TMP102::read_13b()
+{
+  const char tempRegAddr = TEMP_REG_ADDR;
+
+  m_i2c.write(m_addr, &tempRegAddr, 1); //Pointer to the temperature register
+
+  char reg[2] = {0,0};
+  m_i2c.read(m_addr, reg, 2); //Rea
+
+  int16_t res  = ((int8_t)reg[0] << 5) | ((uint8_t)reg[1] >> 3);
+
+  float temp =  (float) ((float)res * 0.0625);
+
+  return temp;
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TMP102.h	Mon Jan 25 10:59:27 2016 +0000
@@ -0,0 +1,58 @@
+
+/* Copyright (C) 2016,Edutech IoT Team, mbed.org, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef TMP102_H
+#define TMP102_H
+
+#include "mbed.h"
+
+//!Library for the TI TMP102 temperature sensor.
+/*!
+The TMP102 is an I2C digital temperature sensor in a small SOT563 package, with a 0.0625C resolution and 0.5C accuracy.
+*/
+class TMP102
+{
+public:
+  //!Creates an instance of the class.
+  /*!
+  Connect module at I2C address addr using I2C port pins sda and scl.
+  TMP102
+  \param addr <table><tr><th>A0 pin connection</th><th>Address</th></tr><tr><td>GND</td><td>0x90</td></tr><tr><td>V+</td><td>0x92</td></tr><tr><td>SDA</td><td>0x94</td></tr><tr><td>SCL</td><td>0x96</td></tr></table>
+  */
+  TMP102(PinName sda, PinName scl, int addr);
+
+  /*!
+  Destroys instance.
+  */
+  ~TMP102();
+
+  //!Reads the current temperature.
+  /*!
+  Reads the temperature register of the TMP102 and converts it to a useable value.
+  */
+  float read_12b();
+  float read_13b();
+
+private:
+  I2C m_i2c;
+  int m_addr;
+
+};
+
+#endif