Tedd OKANO / Mbed 2 deprecated TempSensor_LM75B

Dependencies:   mbed

TempSensor_LM75B.h@0:b1a5601983d4, 2010-01-23 (annotated)

Committer:
okano
Date:
Sat Jan 23 13:45:00 2010 +0000
Revision:
0:b1a5601983d4

        

        
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/*





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 *  I2C digital temperature sensor "LM75B" library





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 *





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 *  LM75B is an I2C based digital temperature sensor





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 *  http://www.nxp.com/pip/LM75B_2.html





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 *





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 *  This is a library to operate this chip easy.





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 *





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 *  Copyright (c) 2010 Tedd OKANO





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 *  Released under the MIT License: http://mbed.org/license/mit





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 *





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 *  revision 1.0  16-Jan-2010   a. 1st release





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 *  revision 1.1  23-Jan-2010   a. class name has been changed from LM75B to TempSensor_LM75B





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 *                              b. copyright notice added





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 */





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#ifndef        MBED_TempSensor_LM75B





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#define        MBED_TempSensor_LM75B





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#include    "mbed.h"





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#include    "I2cBusDevice.h"





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//  LM75B IIC address





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const char    LM75B_base_addr = 0x90;





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//  LM75B registers





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const char    Conf            = 0x01;





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const char    Temp            = 0x00;





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const char    Tos             = 0x03;





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const char    Thyst           = 0x02;





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class TempSensor_LM75B : I2cBusDevice {





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public:





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    TempSensor_LM75B( I2C *i2c, char dev_address = LM75B_base_addr, char vConf = 0x00, short vTos  = 0x5000, short vThyst = 0x4B00 ) : I2cBusDevice( i2c, dev_address ) {





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        char    data[ 3 ];





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        data[ 0 ]    = Conf;





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        data[ 1 ]    = vConf;





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        if ( write( data, 2 ) )





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            ;





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        data[ 0 ]    = Tos;





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        data[ 1 ]    = (char)(vTos >> 8);





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        data[ 2 ]    = (char)vTos;





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        if ( write( data, 3 ) )





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            ;





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        data[ 0 ]    = Thyst;





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        data[ 1 ]    = (char)(vThyst >> 8);





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        data[ 2 ]    = (char)vThyst;





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        if ( write( data, 3 ) )





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            ;





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    }





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    ~TempSensor_LM75B() {





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    }





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    int temp_short( void ) {





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        char    data[ 2 ];





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        if ( read( Temp, data, 2 ) )





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            return ( 1e6 );





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        return ( (((short)data[ 0 ]) << 8 | data[ 1 ]) >> 5 );





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    }





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    float temp( void ) {





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        return ( (float)(temp_short()) / 8.0 );





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    }





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    operator float( void ) {





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        return( temp() );





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    }





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#if 0





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    operator short( void ) {





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        return( temp_short() );





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    }





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#endif





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private:





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}





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;





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#endif