NXP / MMA8652FC

MMA8652 accelerometer library

Dependents:   FRDM-FXS-MULTI2-B_SensorShield_HelloWorld ina-hack-2nd

MMA8652.cpp@1:ccaeb5d75dc2, 2017-04-24 (annotated)

Committer:
AswinSivakumar
Date:
Mon Apr 24 19:09:59 2017 +0000
Revision:
1:ccaeb5d75dc2
Parent:
0:6642dad09196 
updated

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AswinSivakumar 1:ccaeb5d75dc2 1 /*
AswinSivakumar 1:ccaeb5d75dc2 2 * Copyright (c) 2015 - 2016, Freescale Semiconductor, Inc.
AswinSivakumar 1:ccaeb5d75dc2 3 * Copyright 2016-2017 NXP
AswinSivakumar 1:ccaeb5d75dc2 4 *
AswinSivakumar 1:ccaeb5d75dc2 5 * Redistribution and use in source and binary forms, with or without modification,
AswinSivakumar 1:ccaeb5d75dc2 6 * are permitted provided that the following conditions are met:
AswinSivakumar 1:ccaeb5d75dc2 7 *
AswinSivakumar 1:ccaeb5d75dc2 8 * o Redistributions of source code must retain the above copyright notice, this list
AswinSivakumar 1:ccaeb5d75dc2 9 * of conditions and the following disclaimer.
AswinSivakumar 1:ccaeb5d75dc2 10 *
AswinSivakumar 1:ccaeb5d75dc2 11 * o Redistributions in binary form must reproduce the above copyright notice, this
AswinSivakumar 1:ccaeb5d75dc2 12 * list of conditions and the following disclaimer in the documentation and/or
AswinSivakumar 1:ccaeb5d75dc2 13 * other materials provided with the distribution.
AswinSivakumar 1:ccaeb5d75dc2 14 *
AswinSivakumar 1:ccaeb5d75dc2 15 * o Neither the name of the copyright holder nor the names of its
AswinSivakumar 1:ccaeb5d75dc2 16 * contributors may be used to endorse or promote products derived from this
AswinSivakumar 1:ccaeb5d75dc2 17 * software without specific prior written permission.
AswinSivakumar 1:ccaeb5d75dc2 18 *
AswinSivakumar 1:ccaeb5d75dc2 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
AswinSivakumar 1:ccaeb5d75dc2 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
AswinSivakumar 1:ccaeb5d75dc2 21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
AswinSivakumar 1:ccaeb5d75dc2 22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
AswinSivakumar 1:ccaeb5d75dc2 23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
AswinSivakumar 1:ccaeb5d75dc2 24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
AswinSivakumar 1:ccaeb5d75dc2 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
AswinSivakumar 1:ccaeb5d75dc2 26 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
AswinSivakumar 1:ccaeb5d75dc2 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
AswinSivakumar 1:ccaeb5d75dc2 28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
AswinSivakumar 1:ccaeb5d75dc2 29 */
AswinSivakumar 0:6642dad09196 30
AswinSivakumar 0:6642dad09196 31 #include "MMA8652.h"
AswinSivakumar 0:6642dad09196 32 #include "mbed.h"
AswinSivakumar 0:6642dad09196 33
AswinSivakumar 0:6642dad09196 34 MMA8652::MMA8652(PinName sda, PinName scl) : MMA8652_i2c(sda,scl)
AswinSivakumar 0:6642dad09196 35 {
AswinSivakumar 0:6642dad09196 36
AswinSivakumar 0:6642dad09196 37 }
AswinSivakumar 0:6642dad09196 38
AswinSivakumar 0:6642dad09196 39 void MMA8652::MMA8652_config(void)
AswinSivakumar 0:6642dad09196 40 {
AswinSivakumar 0:6642dad09196 41 char d[2];
AswinSivakumar 0:6642dad09196 42 d[0] = MMA8652_CTRL_REG1; //Puts device in Standby mode
AswinSivakumar 0:6642dad09196 43 d[1] = 0x00;
AswinSivakumar 0:6642dad09196 44 MMA8652_i2c.write(MMA8652_I2C_ADDRESS, d,2);
AswinSivakumar 0:6642dad09196 45
AswinSivakumar 0:6642dad09196 46
AswinSivakumar 0:6642dad09196 47 d[0] = MMA8652_CTRL_REG1; //Puts device in Active mode
AswinSivakumar 0:6642dad09196 48 d[1] = 0x01;
AswinSivakumar 0:6642dad09196 49 MMA8652_i2c.write(MMA8652_I2C_ADDRESS, d,2);
AswinSivakumar 0:6642dad09196 50
AswinSivakumar 0:6642dad09196 51 }
AswinSivakumar 0:6642dad09196 52
AswinSivakumar 0:6642dad09196 53
AswinSivakumar 0:6642dad09196 54
AswinSivakumar 0:6642dad09196 55 void MMA8652::acquire_MMA8652_data_g(float * a_data)
AswinSivakumar 0:6642dad09196 56 {
AswinSivakumar 0:6642dad09196 57
AswinSivakumar 0:6642dad09196 58 char data_bytes[7];
AswinSivakumar 0:6642dad09196 59 char d[1];
AswinSivakumar 0:6642dad09196 60 d[0]=MMA8652_STATUS;
AswinSivakumar 0:6642dad09196 61 MMA8652_i2c.write(MMA8652_I2C_ADDRESS,d,1,true); // Read the 6 data bytes - LSB and MSB for X, Y and Z Axes.
AswinSivakumar 0:6642dad09196 62 MMA8652_i2c.read(MMA8652_I2C_ADDRESS,data_bytes,7);
AswinSivakumar 0:6642dad09196 63
AswinSivakumar 0:6642dad09196 64 a_data[0] = ((float)((int16_t)(((data_bytes[1]*256) + (data_bytes[2])))>> 4) * 0.0009765);
AswinSivakumar 0:6642dad09196 65 a_data[1] = ((float)((int16_t)(((data_bytes[3]*256) + (data_bytes[4])))>> 4) * 0.0009765);
AswinSivakumar 0:6642dad09196 66 a_data[2] = ((float)((int16_t)(((data_bytes[5]*256) + (data_bytes[6])))>> 4) * 0.0009765);
AswinSivakumar 0:6642dad09196 67
AswinSivakumar 0:6642dad09196 68 }
AswinSivakumar 0:6642dad09196 69
AswinSivakumar 0:6642dad09196 70