Revision 0:42e8fa13c7a9, committed 2016-03-03

Comitter:

DanielBlomdahl

Date:

Thu Mar 03 16:24:22 2016 +0000

Child:

1:8116bd9d3c46

Commit message:

Initial copy-and-paste from Dr. Larkin. Includes capability for more than one thermometer.

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TMP102.cpp	Thu Mar 03 16:24:22 2016 +0000
@@ -0,0 +1,30 @@
+#include "TMP102.h"
+ 
+#define TEMP_REG_ADDR 0x00
+ 
+TMP102::TMP102(I2C i2c, int addr) : m_i2c(i2c), m_addr(addr)
+{
+ 
+}
+ 
+TMP102::~TMP102()
+{
+ 
+}
+ 
+float TMP102::read()
+{
+  
+  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;
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TMP102.h	Thu Mar 03 16:24:22 2016 +0000
@@ -0,0 +1,38 @@
+#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(I2C i2c, 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();
+  
+private:
+  I2C m_i2c;
+  int m_addr;
+ 
+};
+ 
+#endif
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Mar 03 16:24:22 2016 +0000
@@ -0,0 +1,18 @@
+#include "mbed.h"
+#include "TMP102.h"
+
+I2C i2c(PTE25, PTE24);
+TMP102 temperature(i2c,0x90);  // i2c, address
+/* The TMP102 board has an address of 0x90 if ADD0 is connected to ground */
+
+Serial pc(USBTX,USBRX);
+
+int main()
+{
+   float currentTemp;
+   while (true) {
+       currentTemp = temperature.read();
+       pc.printf("T = %.2fC\r\n", currentTemp);
+       wait(0.5);
+   }
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Thu Mar 03 16:24:22 2016 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/87f2f5183dfb
\ No newline at end of file