File content as of revision 0:f947ed831c67:

#include "mbed.h"

//  LM75B I2C slave address
#define     ADDRESS_LM75B   0x90

//  LM75B registers
#define     LM75B_Conf      0x01
#define     LM75B_Temp      0x00
#define     LM75B_Tos       0x03
#define     LM75B_Thyst     0x02

I2C     i2c( p28, p27 );

void    init( void );
float   read_temp( void );


int main()
{
    init();

    while(1) {
        printf( "temp = %7.3f\r\n", read_temp() );
        wait( 1 );
    }
}

void init( void )
{
    char    command[ 2 ];

    command[ 0 ]    = LM75B_Conf;
    command[ 1 ]    = 0x00;

    i2c.write( ADDRESS_LM75B, command, 2 );
}

float read_temp( void )
{
    char    command[ 2 ];

    command[ 0 ]    = LM75B_Temp;

    i2c.write( ADDRESS_LM75B, command, 1 );  // Send command string
    i2c.read(  ADDRESS_LM75B, command, 2 );  // read two bytes data

    return ( (float)( (command[ 0 ] << 8)| command[1] ) / 256.0 );
}