SPI accelerometer library

Dependents:   FRDMSTBC-A8471_SensorShield_HelloWorld

Fork of MMA8652FC by NXP

FXLS8471.cpp

Committer:
AswinSivakumar
Date:
2017-04-24
Revision:
2:0eacd0e5db3b
Parent:
1:ac1a9afd8401

File content as of revision 2:0eacd0e5db3b:

/*
 * Copyright (c) 2015 - 2016, Freescale Semiconductor, Inc.
 * Copyright 2016-2017 NXP
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * o Redistributions of source code must retain the above copyright notice, this list
 *   of conditions and the following disclaimer.
 *
 * o Redistributions in binary form must reproduce the above copyright notice, this
 *   list of conditions and the following disclaimer in the documentation and/or
 *   other materials provided with the distribution.
 *
 * o Neither the name of the copyright holder nor the names of its
 *   contributors may be used to endorse or promote products derived from this
 *   software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "FXLS8471.h"
 #include "mbed.h"

FXLS8471::FXLS8471(PinName MOSI, PinName MISO, PinName CLK, PinName CS) : FXLS8471_spi(MOSI,MISO,CLK), FXLS8471_cs(CS)
 {
      FXLS8471_cs=1;
 }
    
 void FXLS8471::FXLS8471_config(void)
 {
   char d[2]; 
   d[0] = FXLS8471_CTRL_REG1;                     //Puts device in Standby mode
   FXLS8471_cs=0;
   FXLS8471_spi.write(d[0]+128); 
   FXLS8471_spi.write(0x00);  
   FXLS8471_spi.write(0x00);  
   FXLS8471_cs=1;
          
   
   d[0] = FXLS8471_CTRL_REG1;                     //Puts device in Active mode
   FXLS8471_cs=0;
   FXLS8471_spi.write(d[0]+128); 
   FXLS8471_spi.write(0x01);  
   FXLS8471_spi.write(0x01);  
   FXLS8471_cs=1;  
      
 }
 
  
 
 void FXLS8471::acquire_FXLS8471_data_g(float * a_data)
 {
  
   char data_bytes[7];
   char d[1];
   int count=1;
   d[0]=0x01;
   
   FXLS8471_cs=0;
   FXLS8471_spi.write(d[0]); 
   FXLS8471_spi.write(0x00);  
   while(count<7)
   {  data_bytes[count]= FXLS8471_spi.write(0xff);  count=count+1;
   }
   FXLS8471_cs=1;
   
   // a_data[0]= ((float)((int16_t)data_bytes[1]));
   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);
   
 }