A simply library for the LM75B I2C temperature sensor

Dependents:   LM75B-HelloWorld app-board-Sprint-SMS-LM75B SprintUSBModemWebsocketTest-Temp app-board-Ethernet-Websocket ... more

Files at this revision

API Documentation at this revision

Comitter:
chris
Date:
Fri Oct 26 20:34:16 2012 +0000
Child:
1:6a70c9303bbe
Commit message:
First commit

Changed in this revision

LM75B.cpp Show annotated file Show diff for this revision Revisions of this file
LM75B.h Show annotated file Show diff for this revision Revisions of this file
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LM75B.cpp	Fri Oct 26 20:34:16 2012 +0000
@@ -0,0 +1,49 @@
+
+/*
+Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
+ 
+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 "LM75B.h"
+
+LM75B::LM75B(PinName sda, PinName scl) : i2c(sda, scl)
+{
+   char cmd[2];
+   cmd[0]    = LM75B_Conf;
+   cmd[1]    = 0x0;   
+   i2c.write( LM75B_ADDR, cmd, 2);
+}
+
+
+
+LM75B::~LM75B()
+{
+
+}
+
+float LM75B::read()
+{
+    char cmd[2];
+    cmd[0] = LM75B_Temp;
+   
+    i2c.write( LM75B_ADDR, cmd, 1); // Send command string
+    i2c.read( LM75B_ADDR, cmd, 2); // Send command string    
+    return (   float((cmd[0]<<8)|cmd[1]) / 256.0   );
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LM75B.h	Fri Oct 26 20:34:16 2012 +0000
@@ -0,0 +1,64 @@
+/* Copyright (c) 2012 cstyles, 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 LM75B_H
+#define LM75B_H
+
+#include "mbed.h"
+
+//  LM75B IIC address
+#define    LM75B_ADDR 0x90
+
+//  LM75B registers
+#define    LM75B_Conf        0x01
+#define    LM75B_Temp        0x00
+#define    LM75B_Tos         0x03
+#define    LM75B_Thyst       0x02
+
+//!Library for the LM75B temperature sensor.
+/*!
+The LM75B is an I2C digital temperature sensor, with a range of -55C to +125C and a 0.125C resolution.
+*/
+class LM75B
+{
+public:
+  //!Creates an instance of the class.
+  /*!
+  Connect module at I2C address addr using I2C port pins sda and scl.
+  LM75B
+  */
+  LM75B(PinName sda, PinName scl);
+  
+  /*!
+  Destroys instance.
+  */ 
+  ~LM75B();
+  
+  //!Reads the current temperature.
+  /*!
+  Reads the temperature register of the LM75B and converts it to a useable value.
+  */
+  float read();
+  
+private:
+  
+  I2C i2c;
+
+};
+
+#endif
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