Aswin Sivakumar / MPL3115A2

MPL3115A2 Pressure sensor library

Dependents:   FRDM-FXS-MULTI2-B_SensorShield_HelloWorld

MPL3115.cpp@1:423fad528a24, 2017-04-26 (annotated)

Committer:
AswinSivakumar
Date:
Wed Apr 26 00:20:55 2017 +0000
Revision:
1:423fad528a24
Parent:
0:2cc0f6ef330f 
updated

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AswinSivakumar 1:423fad528a24 1 /*
AswinSivakumar 1:423fad528a24 2 * Copyright (c) 2015 - 2016, Freescale Semiconductor, Inc.
AswinSivakumar 1:423fad528a24 3 * Copyright 2016-2017 NXP
AswinSivakumar 1:423fad528a24 4 *
AswinSivakumar 1:423fad528a24 5 * Redistribution and use in source and binary forms, with or without modification,
AswinSivakumar 1:423fad528a24 6 * are permitted provided that the following conditions are met:
AswinSivakumar 1:423fad528a24 7 *
AswinSivakumar 1:423fad528a24 8 * o Redistributions of source code must retain the above copyright notice, this list
AswinSivakumar 1:423fad528a24 9 * of conditions and the following disclaimer.
AswinSivakumar 1:423fad528a24 10 *
AswinSivakumar 1:423fad528a24 11 * o Redistributions in binary form must reproduce the above copyright notice, this
AswinSivakumar 1:423fad528a24 12 * list of conditions and the following disclaimer in the documentation and/or
AswinSivakumar 1:423fad528a24 13 * other materials provided with the distribution.
AswinSivakumar 1:423fad528a24 14 *
AswinSivakumar 1:423fad528a24 15 * o Neither the name of the copyright holder nor the names of its
AswinSivakumar 1:423fad528a24 16 * contributors may be used to endorse or promote products derived from this
AswinSivakumar 1:423fad528a24 17 * software without specific prior written permission.
AswinSivakumar 1:423fad528a24 18 *
AswinSivakumar 1:423fad528a24 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
AswinSivakumar 1:423fad528a24 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
AswinSivakumar 1:423fad528a24 21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
AswinSivakumar 1:423fad528a24 22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
AswinSivakumar 1:423fad528a24 23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
AswinSivakumar 1:423fad528a24 24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
AswinSivakumar 1:423fad528a24 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
AswinSivakumar 1:423fad528a24 26 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
AswinSivakumar 1:423fad528a24 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
AswinSivakumar 1:423fad528a24 28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
AswinSivakumar 1:423fad528a24 29 */
AswinSivakumar 0:2cc0f6ef330f 30
AswinSivakumar 0:2cc0f6ef330f 31 #include "MPL3115.h"
AswinSivakumar 0:2cc0f6ef330f 32 #include "mbed.h"
AswinSivakumar 0:2cc0f6ef330f 33
AswinSivakumar 0:2cc0f6ef330f 34 MPL3115::MPL3115(PinName sda, PinName scl) : MPL3115_i2c(sda,scl)
AswinSivakumar 0:2cc0f6ef330f 35 {
AswinSivakumar 0:2cc0f6ef330f 36
AswinSivakumar 0:2cc0f6ef330f 37 }
AswinSivakumar 0:2cc0f6ef330f 38
AswinSivakumar 0:2cc0f6ef330f 39 void MPL3115::MPL3115_config(void)
AswinSivakumar 0:2cc0f6ef330f 40 {
AswinSivakumar 0:2cc0f6ef330f 41 char d[2];
AswinSivakumar 0:2cc0f6ef330f 42 d[0] = MPL3115_CTRL_REG1; //Puts device in Standby mode
AswinSivakumar 0:2cc0f6ef330f 43 d[1] = 0x00;
AswinSivakumar 0:2cc0f6ef330f 44 MPL3115_i2c.write(MPL3115_I2C_ADDRESS, d,2);
AswinSivakumar 0:2cc0f6ef330f 45
AswinSivakumar 0:2cc0f6ef330f 46
AswinSivakumar 0:2cc0f6ef330f 47 d[0] = MPL3115_CTRL_REG1; //Puts device in Active mode and in altimeter mode
AswinSivakumar 0:2cc0f6ef330f 48 d[1] = 0x81;
AswinSivakumar 0:2cc0f6ef330f 49 MPL3115_i2c.write(MPL3115_I2C_ADDRESS, d, 2);
AswinSivakumar 0:2cc0f6ef330f 50
AswinSivakumar 0:2cc0f6ef330f 51 }
AswinSivakumar 0:2cc0f6ef330f 52
AswinSivakumar 0:2cc0f6ef330f 53
AswinSivakumar 0:2cc0f6ef330f 54
AswinSivakumar 0:2cc0f6ef330f 55 void MPL3115::acquire_MPL3115_data_Altitude_in_m(float * alt_data)
AswinSivakumar 0:2cc0f6ef330f 56 {
AswinSivakumar 0:2cc0f6ef330f 57
AswinSivakumar 0:2cc0f6ef330f 58 char data_bytes[7];
AswinSivakumar 0:2cc0f6ef330f 59 char d[1];
AswinSivakumar 0:2cc0f6ef330f 60 d[0]=MPL3115_STATUS;
AswinSivakumar 0:2cc0f6ef330f 61 MPL3115_i2c.write(MPL3115_I2C_ADDRESS,d,1,true); // Read the 6 data bytes - LSB and MSB for X, Y and Z Axes.
AswinSivakumar 0:2cc0f6ef330f 62 MPL3115_i2c.read(MPL3115_I2C_ADDRESS,data_bytes,5);
AswinSivakumar 0:2cc0f6ef330f 63 alt_data[0]= (float)((short)((data_bytes[1] << 8 ) | data_bytes[2])) + (float)(data_bytes[3]>>4) * 0.0625;
AswinSivakumar 0:2cc0f6ef330f 64
AswinSivakumar 0:2cc0f6ef330f 65
AswinSivakumar 0:2cc0f6ef330f 66 }