GHI Electronics / Mbed 2 deprecated Official_E-Dice

The preloaded firmware shipped on the E-Dice.

Dependencies:   mbed

MMA845x.cpp@1:a30065092967, 2014-09-15 (annotated)

Committer:
Experiment626
Date:
Mon Sep 15 16:09:51 2014 +0000
Revision:
1:a30065092967
Parent:
0:7c263455b8b9 
Added Apache 2 license text

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Experiment626 0:7c263455b8b9 1 /* Copyright (c) 2014 GHI Electronics, LLC
Experiment626 0:7c263455b8b9 2 *
Experiment626 0:7c263455b8b9 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
Experiment626 0:7c263455b8b9 4 * and associated documentation files (the "Software"), to deal in the Software without
Experiment626 0:7c263455b8b9 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
Experiment626 0:7c263455b8b9 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
Experiment626 0:7c263455b8b9 7 * Software is furnished to do so, subject to the following conditions:
Experiment626 0:7c263455b8b9 8 *
Experiment626 0:7c263455b8b9 9 * The above copyright notice and this permission notice shall be included in all copies or
Experiment626 0:7c263455b8b9 10 * substantial portions of the Software.
Experiment626 0:7c263455b8b9 11 *
Experiment626 0:7c263455b8b9 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
Experiment626 0:7c263455b8b9 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
Experiment626 0:7c263455b8b9 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
Experiment626 0:7c263455b8b9 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
Experiment626 0:7c263455b8b9 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Experiment626 0:7c263455b8b9 17 */
Experiment626 0:7c263455b8b9 18
Experiment626 0:7c263455b8b9 19 #include "MMA845x.h"
Experiment626 0:7c263455b8b9 20
Experiment626 0:7c263455b8b9 21 #define X_AXIS 0x01
Experiment626 0:7c263455b8b9 22 #define Y_AXIS 0x03
Experiment626 0:7c263455b8b9 23 #define Z_AXIS 0x05
Experiment626 0:7c263455b8b9 24
Experiment626 0:7c263455b8b9 25 MMA845x::MMA845x(PinName sda, PinName scl, int i2cAddress) : i2cBus(sda, scl), i2cAddress(i2cAddress)
Experiment626 0:7c263455b8b9 26 {
Experiment626 0:7c263455b8b9 27 uint8_t initializeDataCommand[2] = {0x2A, 0x01};
Experiment626 0:7c263455b8b9 28 i2cBus.write(i2cAddress, (char*)initializeDataCommand, 2);
Experiment626 0:7c263455b8b9 29 }
Experiment626 0:7c263455b8b9 30
Experiment626 0:7c263455b8b9 31 MMA845x::~MMA845x()
Experiment626 0:7c263455b8b9 32 {
Experiment626 0:7c263455b8b9 33 }
Experiment626 0:7c263455b8b9 34
Experiment626 0:7c263455b8b9 35 int16_t MMA845x::getX()
Experiment626 0:7c263455b8b9 36 {
Experiment626 0:7c263455b8b9 37 return readAxisRegister(X_AXIS);
Experiment626 0:7c263455b8b9 38 }
Experiment626 0:7c263455b8b9 39
Experiment626 0:7c263455b8b9 40 int16_t MMA845x::getY()
Experiment626 0:7c263455b8b9 41 {
Experiment626 0:7c263455b8b9 42 return readAxisRegister(Y_AXIS);
Experiment626 0:7c263455b8b9 43 }
Experiment626 0:7c263455b8b9 44
Experiment626 0:7c263455b8b9 45 int16_t MMA845x::getZ()
Experiment626 0:7c263455b8b9 46 {
Experiment626 0:7c263455b8b9 47 return readAxisRegister(Z_AXIS);
Experiment626 0:7c263455b8b9 48 }
Experiment626 0:7c263455b8b9 49
Experiment626 0:7c263455b8b9 50 void MMA845x::GetXYZ(int& x, int& y, int& z)
Experiment626 0:7c263455b8b9 51 {
Experiment626 0:7c263455b8b9 52 }
Experiment626 0:7c263455b8b9 53
Experiment626 0:7c263455b8b9 54 int16_t MMA845x::readAxisRegister(uint8_t axisRegisterAddress)
Experiment626 0:7c263455b8b9 55 {
Experiment626 0:7c263455b8b9 56 uint8_t axisData[2];
Experiment626 0:7c263455b8b9 57 readRegister(axisRegisterAddress, axisData, 2);
Experiment626 0:7c263455b8b9 58
Experiment626 0:7c263455b8b9 59 int16_t rawAxisData = ((axisData[0] << 2) | (axisData[1] >> 6));
Experiment626 0:7c263455b8b9 60
Experiment626 0:7c263455b8b9 61 if (rawAxisData > 511)
Experiment626 0:7c263455b8b9 62 rawAxisData = rawAxisData - 1024;
Experiment626 0:7c263455b8b9 63
Experiment626 0:7c263455b8b9 64 return rawAxisData;
Experiment626 0:7c263455b8b9 65 }
Experiment626 0:7c263455b8b9 66
Experiment626 0:7c263455b8b9 67 void MMA845x::readRegister(uint8_t registerAddress, uint8_t* data, int length)
Experiment626 0:7c263455b8b9 68 {
Experiment626 0:7c263455b8b9 69 char convertedRegisterAddress[] = {registerAddress};
Experiment626 0:7c263455b8b9 70 i2cBus.write(i2cAddress, convertedRegisterAddress, 1, true);
Experiment626 0:7c263455b8b9 71 i2cBus.read(i2cAddress, (char*)data, length);
Experiment626 0:7c263455b8b9 72 }
Experiment626 0:7c263455b8b9 73
Experiment626 0:7c263455b8b9 74