MPL3115A2

Sensors

10

Freescale Semiconductor, Inc.

4

Quick Start Quick Setup Guide

The quick setup guide shows how to put the part in Altimeter mode with an OSR of 128. You may then select your data retrieval

method between polling, interrupt or FIFO. The following routines are used:

/*********************************************************\

* IIC Write Register

\*********************************************************/

void IIC_RegWrite(byte address, byte reg,byte val)

{

IICC_TX = 1;

// Transmit Mode

IIC_Start();

// Send Start

IIC_CycleWrite(address);

// Send IIC "Write" Address

IIC_CycleWrite(reg);

// Send Register

IIC_CycleWrite(val);

// Send Value

IIC_Stop();

// Send Stop

}

/*********************************************************\

* IIC Read Register

\*********************************************************/

byte IIC_RegRead(byte address, byte reg)

{

byte b;

IICC_TX = 1;

// Transmit Mode

IIC_Start();

// Send Start

IIC_CycleWrite(address);

// Send IIC "Write" Address

IIC_CycleWrite(reg);

// Send Register

IIC_RepeatStart();

// Send Repeat Start

IIC_CycleWrite(address+1);

// Send IIC "Read" Address

b = IIC_CycleRead(1);

// *** Dummy read: reads

// "IIC_ReadAddress" value ***

b = IIC_StopRead();

// Send Stop Read Command IICD

return b;

}

/*********************************************************\

* IIC Read Multiple Registers

\*********************************************************/

void IIC_RegReadN(byte address, byte reg1,byte N,byte *array)

{

byte b;

IICC_TX = 1;

// Transmit Mode

IIC_Start();

// Send Start

IIC_CycleWrite(address);

// Send IIC "Write" Address

IIC_CycleWrite(reg1);

// Send Register

IIC_RepeatStart();

// Send Repeat Start

IIC_CycleWrite(address+1);

// Send IIC "Read" Address

b = IIC_CycleRead(N);

// *** Dummy read: reads

// "IIC_ReadAddress" value ***