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); }