I2C Accelerometer library
Dependents: FRDMSTBC-A8491_SensorShield xtrinsic_sensors 1-FRDM-Gimbal-LAB
MMA8491.cpp
- Committer:
- AswinSivakumar
- Date:
- 2016-03-23
- Revision:
- 0:4f7ab3a47e7b
- Child:
- 1:ce9ae6fa9407
File content as of revision 0:4f7ab3a47e7b:
/* 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 "MMA8491.h" #include "mbed.h" MMA8491::MMA8491(PinName sda, PinName scl, PinName en) : MMA8491_i2c(sda,scl),MMA8491_en(en) { MMA8491_en=0; } void MMA8491::acquire_MMA8491_data_g(float * a_data) { char data_bytes[7]; char d[1]; MMA8491_en=1; wait(0.001); d[0]=MMA8491_STATUS; MMA8491_i2c.write(MMA8491_I2C_ADDRESS,d,1,true); MMA8491_i2c.read(MMA8491_I2C_ADDRESS,data_bytes,7);// Read the 6 data bytes - LSB and MSB for X, Y and Z Axes. MMA8491_en=0; // a_data[0]= ((float)((int16_t)data_bytes[1])); a_data[0] = ((float)((int16_t)(((data_bytes[1]*256) + (data_bytes[2])))>> 2) * 0.0009765); a_data[1] = ((float)((int16_t)(((data_bytes[3]*256) + (data_bytes[4])))>> 2) * 0.0009765); a_data[2] = ((float)((int16_t)(((data_bytes[5]*256) + (data_bytes[6])))>> 2) * 0.0009765); }