NXP / MMA8652FC

MMA8652 accelerometer library

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

MMA8652.cpp@0:6642dad09196, 2016-01-23 (annotated)

Committer:
AswinSivakumar
Date:
Sat Jan 23 00:07:11 2016 +0000
Revision:
0:6642dad09196
Child:
1:ccaeb5d75dc2
First commit;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AswinSivakumar 0:6642dad09196 1 /* Copyright (c) 2015 NXP Semiconductors. MIT License
AswinSivakumar 0:6642dad09196 2 *
AswinSivakumar 0:6642dad09196 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
AswinSivakumar 0:6642dad09196 4 * and associated documentation files (the "Software"), to deal in the Software without
AswinSivakumar 0:6642dad09196 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
AswinSivakumar 0:6642dad09196 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
AswinSivakumar 0:6642dad09196 7 * Software is furnished to do so, subject to the following conditions:
AswinSivakumar 0:6642dad09196 8 *
AswinSivakumar 0:6642dad09196 9 * The above copyright notice and this permission notice shall be included in all copies or
AswinSivakumar 0:6642dad09196 10 * substantial portions of the Software.
AswinSivakumar 0:6642dad09196 11 *
AswinSivakumar 0:6642dad09196 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
AswinSivakumar 0:6642dad09196 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
AswinSivakumar 0:6642dad09196 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
AswinSivakumar 0:6642dad09196 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
AswinSivakumar 0:6642dad09196 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
AswinSivakumar 0:6642dad09196 17 */
AswinSivakumar 0:6642dad09196 18
AswinSivakumar 0:6642dad09196 19 #include "MMA8652.h"
AswinSivakumar 0:6642dad09196 20 #include "mbed.h"
AswinSivakumar 0:6642dad09196 21
AswinSivakumar 0:6642dad09196 22 MMA8652::MMA8652(PinName sda, PinName scl) : MMA8652_i2c(sda,scl)
AswinSivakumar 0:6642dad09196 23 {
AswinSivakumar 0:6642dad09196 24
AswinSivakumar 0:6642dad09196 25 }
AswinSivakumar 0:6642dad09196 26
AswinSivakumar 0:6642dad09196 27 void MMA8652::MMA8652_config(void)
AswinSivakumar 0:6642dad09196 28 {
AswinSivakumar 0:6642dad09196 29 char d[2];
AswinSivakumar 0:6642dad09196 30 d[0] = MMA8652_CTRL_REG1; //Puts device in Standby mode
AswinSivakumar 0:6642dad09196 31 d[1] = 0x00;
AswinSivakumar 0:6642dad09196 32 MMA8652_i2c.write(MMA8652_I2C_ADDRESS, d,2);
AswinSivakumar 0:6642dad09196 33
AswinSivakumar 0:6642dad09196 34
AswinSivakumar 0:6642dad09196 35 d[0] = MMA8652_CTRL_REG1; //Puts device in Active mode
AswinSivakumar 0:6642dad09196 36 d[1] = 0x01;
AswinSivakumar 0:6642dad09196 37 MMA8652_i2c.write(MMA8652_I2C_ADDRESS, d,2);
AswinSivakumar 0:6642dad09196 38
AswinSivakumar 0:6642dad09196 39 }
AswinSivakumar 0:6642dad09196 40
AswinSivakumar 0:6642dad09196 41
AswinSivakumar 0:6642dad09196 42
AswinSivakumar 0:6642dad09196 43 void MMA8652::acquire_MMA8652_data_g(float * a_data)
AswinSivakumar 0:6642dad09196 44 {
AswinSivakumar 0:6642dad09196 45
AswinSivakumar 0:6642dad09196 46 char data_bytes[7];
AswinSivakumar 0:6642dad09196 47 char d[1];
AswinSivakumar 0:6642dad09196 48 d[0]=MMA8652_STATUS;
AswinSivakumar 0:6642dad09196 49 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 50 MMA8652_i2c.read(MMA8652_I2C_ADDRESS,data_bytes,7);
AswinSivakumar 0:6642dad09196 51
AswinSivakumar 0:6642dad09196 52 a_data[0] = ((float)((int16_t)(((data_bytes[1]*256) + (data_bytes[2])))>> 4) * 0.0009765);
AswinSivakumar 0:6642dad09196 53 a_data[1] = ((float)((int16_t)(((data_bytes[3]*256) + (data_bytes[4])))>> 4) * 0.0009765);
AswinSivakumar 0:6642dad09196 54 a_data[2] = ((float)((int16_t)(((data_bytes[5]*256) + (data_bytes[6])))>> 4) * 0.0009765);
AswinSivakumar 0:6642dad09196 55
AswinSivakumar 0:6642dad09196 56 }
AswinSivakumar 0:6642dad09196 57
AswinSivakumar 0:6642dad09196 58