MMA8652 accelerometer library

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

MMA8652.cpp

Committer:
AswinSivakumar
Date:
2016-01-23
Revision:
0:6642dad09196
Child:
1:ccaeb5d75dc2

File content as of revision 0:6642dad09196:

 /* Copyright (c) 2015 NXP Semiconductors. MIT License
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
* and associated documentation files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or
* substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

#include "MMA8652.h"
 #include "mbed.h"

MMA8652::MMA8652(PinName sda, PinName scl) : MMA8652_i2c(sda,scl)
 {
       
 }
    
 void MMA8652::MMA8652_config(void)
 {
   char d[2]; 
   d[0] = MMA8652_CTRL_REG1;                     //Puts device in Standby mode
   d[1] = 0x00; 
   MMA8652_i2c.write(MMA8652_I2C_ADDRESS, d,2);   
          
   
   d[0] = MMA8652_CTRL_REG1;                     //Puts device in Active mode
   d[1] = 0x01;
   MMA8652_i2c.write(MMA8652_I2C_ADDRESS, d,2);   
      
 }
 
  
 
 void MMA8652::acquire_MMA8652_data_g(float * a_data)
 {
  
   char data_bytes[7];
   char d[1];
   d[0]=MMA8652_STATUS;
  MMA8652_i2c.write(MMA8652_I2C_ADDRESS,d,1,true);  // Read the 6 data bytes - LSB and MSB for X, Y and Z Axes.
   MMA8652_i2c.read(MMA8652_I2C_ADDRESS,data_bytes,7);
   
   a_data[0] =  ((float)((int16_t)(((data_bytes[1]*256) + (data_bytes[2])))>> 4) * 0.0009765);
   a_data[1] =  ((float)((int16_t)(((data_bytes[3]*256) + (data_bytes[4])))>> 4) * 0.0009765);
   a_data[2] =  ((float)((int16_t)(((data_bytes[5]*256) + (data_bytes[6])))>> 4) * 0.0009765);
   
 }