Tedd OKANO / PCT2075

Component class library for PCT2075 and LM75B. The PCT2075 is a temperature-to-digital converter featuring +/-1 degree-C accuracy over -25 degree-C to +100 degree-C range. It uses an on-chip band gap temperature sensor and Sigma-Delta A-to-D conversion technique with an overtemperature detection output that is a drop-in replacement for other LM75 series thermal sensors.

Dependents:   PCT2075_Hello Brushless_STM3_ESC_2019_10 Alternator2020_06

base_class/I2CTempSensor.cpp

Committer:
okano
Date:
2015-03-05
Revision:
1:0cdfb3ea5969
Parent:
0:ae0333775d7e

File content as of revision 1:0cdfb3ea5969:

#include "I2CTempSensor.h"

I2CTempSensor::I2CTempSensor( PinName i2c_sda, PinName i2c_scl, char address ) 
    : i2c_p( new I2C( i2c_sda, i2c_scl ) ), i2c( *i2c_p ), adr( address )
{
    init();
}

I2CTempSensor::I2CTempSensor( I2C &i2c_obj, char address )
    : i2c_p( NULL ), i2c( i2c_obj ), adr( address )
{
    init();
}

I2CTempSensor::~I2CTempSensor()
{
    if ( NULL != i2c_p )
        delete  i2c_p;
}

void I2CTempSensor::init( void )
{
    char    command[ 2 ];

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

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

short I2CTempSensor::read16( void )
{
    char    command[ 2 ];

    command[ 0 ]    = LM75B_Temp;

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

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