CPS-Lab1 / Lab7-ReadReg

Working on readReg

Fork of MPL3115A2 by NXP

MPL3115.cpp@3:641510862795, 2018-02-27 (annotated)

Committer:
csinders
Date:
Tue Feb 27 15:56:28 2018 +0000
Revision:
3:641510862795
Parent:
2:c705222de18d 
Have a start for readReg.  Need to figure out the bitshifting for it.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AswinSivakumar 2:c705222de18d 1 /*
AswinSivakumar 2:c705222de18d 2 * Copyright (c) 2015 - 2016, Freescale Semiconductor, Inc.
AswinSivakumar 2:c705222de18d 3 * Copyright 2016-2017 NXP
AswinSivakumar 2:c705222de18d 4 *
AswinSivakumar 2:c705222de18d 5 * Redistribution and use in source and binary forms, with or without modification,
AswinSivakumar 2:c705222de18d 6 * are permitted provided that the following conditions are met:
AswinSivakumar 2:c705222de18d 7 *
AswinSivakumar 2:c705222de18d 8 * o Redistributions of source code must retain the above copyright notice, this list
AswinSivakumar 2:c705222de18d 9 * of conditions and the following disclaimer.
AswinSivakumar 2:c705222de18d 10 *
AswinSivakumar 2:c705222de18d 11 * o Redistributions in binary form must reproduce the above copyright notice, this
AswinSivakumar 2:c705222de18d 12 * list of conditions and the following disclaimer in the documentation and/or
AswinSivakumar 2:c705222de18d 13 * other materials provided with the distribution.
AswinSivakumar 2:c705222de18d 14 *
AswinSivakumar 2:c705222de18d 15 * o Neither the name of the copyright holder nor the names of its
AswinSivakumar 2:c705222de18d 16 * contributors may be used to endorse or promote products derived from this
AswinSivakumar 2:c705222de18d 17 * software without specific prior written permission.
AswinSivakumar 2:c705222de18d 18 *
AswinSivakumar 2:c705222de18d 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
AswinSivakumar 2:c705222de18d 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
AswinSivakumar 2:c705222de18d 21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
AswinSivakumar 2:c705222de18d 22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
AswinSivakumar 2:c705222de18d 23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
AswinSivakumar 2:c705222de18d 24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
AswinSivakumar 2:c705222de18d 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
AswinSivakumar 2:c705222de18d 26 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
AswinSivakumar 2:c705222de18d 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
AswinSivakumar 2:c705222de18d 28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
AswinSivakumar 2:c705222de18d 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
csinders 3:641510862795 53 int MPL3115::readReg(int address) {
csinders 3:641510862795 54 int length = 8;
csinders 3:641510862795 55 char d[1];
csinders 3:641510862795 56 char readData[length];
csinders 3:641510862795 57
csinders 3:641510862795 58 d[0] = MPL3115_STATUS;
csinders 3:641510862795 59 MPL3115_i2c.write(MPL3115_I2C_ADDRESS,d,1,true);
csinders 3:641510862795 60 MPL3115_i2c.read(MPL3115_I2C_ADDRESS,readData,length);
csinders 3:641510862795 61 for (int i = 0; i < length; i++) {
csinders 3:641510862795 62 if (readData[i]) {
csinders 3:641510862795 63 printf("The readData of %d is 1\r\n",i);
csinders 3:641510862795 64 } else {
csinders 3:641510862795 65 printf("The readData of %d is 0\r\n",i);
csinders 3:641510862795 66 }
csinders 3:641510862795 67 }
csinders 3:641510862795 68
csinders 3:641510862795 69 //printf("The readData is : %s\r\n", readData);
csinders 3:641510862795 70 int returnValue = 0;
csinders 3:641510862795 71 for (int i = 0; i < length; i++) {
csinders 3:641510862795 72 returnValue << readData[i];
csinders 3:641510862795 73 }
csinders 3:641510862795 74
csinders 3:641510862795 75 return returnValue;
csinders 3:641510862795 76
csinders 3:641510862795 77 }
AswinSivakumar 0:2cc0f6ef330f 78
csinders 3:641510862795 79
AswinSivakumar 0:2cc0f6ef330f 80
AswinSivakumar 0:2cc0f6ef330f 81 void MPL3115::acquire_MPL3115_data_Altitude_in_m(float * alt_data)
AswinSivakumar 0:2cc0f6ef330f 82 {
AswinSivakumar 0:2cc0f6ef330f 83
AswinSivakumar 0:2cc0f6ef330f 84 char data_bytes[7];
AswinSivakumar 0:2cc0f6ef330f 85 char d[1];
AswinSivakumar 0:2cc0f6ef330f 86 d[0]=MPL3115_STATUS;
AswinSivakumar 0:2cc0f6ef330f 87 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 88 MPL3115_i2c.read(MPL3115_I2C_ADDRESS,data_bytes,5);
AswinSivakumar 0:2cc0f6ef330f 89 alt_data[0]= (float)((short)((data_bytes[1] << 8 ) | data_bytes[2])) + (float)(data_bytes[3]>>4) * 0.0625;
AswinSivakumar 0:2cc0f6ef330f 90
AswinSivakumar 0:2cc0f6ef330f 91
AswinSivakumar 0:2cc0f6ef330f 92 }