MPL3115.cpp

00001 /*
00002  * Copyright (c) 2015 - 2016, Freescale Semiconductor, Inc.
00003  * Copyright 2016-2017 NXP
00004  *
00005  * Redistribution and use in source and binary forms, with or without modification,
00006  * are permitted provided that the following conditions are met:
00007  *
00008  * o Redistributions of source code must retain the above copyright notice, this list
00009  *   of conditions and the following disclaimer.
00010  *
00011  * o Redistributions in binary form must reproduce the above copyright notice, this
00012  *   list of conditions and the following disclaimer in the documentation and/or
00013  *   other materials provided with the distribution.
00014  *
00015  * o Neither the name of the copyright holder nor the names of its
00016  *   contributors may be used to endorse or promote products derived from this
00017  *   software without specific prior written permission.
00018  *
00019  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
00020  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
00021  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00022  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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00024  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
00025  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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00028  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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00030 
00031 #include "MPL3115.h"
00032  #include "mbed.h"
00033 
00034 MPL3115::MPL3115(PinName sda, PinName scl) : MPL3115_i2c(sda,scl)
00035  {
00036        
00037  }
00038     
00039  void MPL3115::MPL3115_config(void)
00040  {
00041    char d[2]; 
00042    d[0] = MPL3115_CTRL_REG1;                     //Puts device in Standby mode
00043    d[1] = 0x00; 
00044    MPL3115_i2c.write(MPL3115_I2C_ADDRESS, d,2);   
00045           
00046    
00047    d[0] = MPL3115_CTRL_REG1;                     //Puts device in Active mode and in altimeter mode
00048    d[1] = 0x81;
00049    MPL3115_i2c.write(MPL3115_I2C_ADDRESS, d, 2);   
00050       
00051  }
00052  
00053  
00054  
00055  void MPL3115::acquire_MPL3115_data_Altitude_in_m(float * alt_data)
00056  {
00057   
00058    char data_bytes[7];
00059    char d[1];
00060    d[0]=MPL3115_STATUS;
00061    MPL3115_i2c.write(MPL3115_I2C_ADDRESS,d,1,true);  // Read the 6 data bytes - LSB and MSB for X, Y and Z Axes.
00062    MPL3115_i2c.read(MPL3115_I2C_ADDRESS,data_bytes,5);
00063    alt_data[0]= (float)((short)((data_bytes[1] << 8 ) | data_bytes[2])) + (float)(data_bytes[3]>>4) * 0.0625;
00064   
00065   
00066  }