palheart@mailinator.com palheart@mailinator.com / MMA8451QASD

Renamed the whole thing in order to prevent messing up with the real library

Dependents:   ActiveGamesWeek1

Fork of MMA8451Q by Emilio Monti

MMA8451Q.cpp@5:d3d979cbf5b6, 2014-08-07 (annotated)

Committer:
palheart
Date:
Thu Aug 07 08:36:48 2014 +0000
Revision:
5:d3d979cbf5b6
Parent:
3:db7126dbd63f 
Renamed the whole thing in order to prevent messing up with the real library

Who changed what in which revision?

UserRevisionLine numberNew contents of line
samux 1:d2630136d51e 1 /* Copyright (c) 2010-2011 mbed.org, MIT License
samux 1:d2630136d51e 2 *
samux 1:d2630136d51e 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
samux 1:d2630136d51e 4 * and associated documentation files (the "Software"), to deal in the Software without
samux 1:d2630136d51e 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
samux 1:d2630136d51e 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
samux 1:d2630136d51e 7 * Software is furnished to do so, subject to the following conditions:
samux 1:d2630136d51e 8 *
samux 1:d2630136d51e 9 * The above copyright notice and this permission notice shall be included in all copies or
samux 1:d2630136d51e 10 * substantial portions of the Software.
samux 1:d2630136d51e 11 *
samux 1:d2630136d51e 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
samux 1:d2630136d51e 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
samux 1:d2630136d51e 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
samux 1:d2630136d51e 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
samux 1:d2630136d51e 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
samux 1:d2630136d51e 17 */
samux 1:d2630136d51e 18
emilmont 0:6149091f755d 19 #include "MMA8451Q.h"
emilmont 0:6149091f755d 20
samux 1:d2630136d51e 21 #define REG_WHO_AM_I 0x0D
samux 1:d2630136d51e 22 #define REG_CTRL_REG_1 0x2A
emilmont 0:6149091f755d 23 #define REG_OUT_X_MSB 0x01
emilmont 0:6149091f755d 24 #define REG_OUT_Y_MSB 0x03
emilmont 0:6149091f755d 25 #define REG_OUT_Z_MSB 0x05
emilmont 0:6149091f755d 26
samux 1:d2630136d51e 27 #define UINT14_MAX 16383
emilmont 0:6149091f755d 28
emilmont 0:6149091f755d 29 MMA8451Q::MMA8451Q(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr) {
emilmont 0:6149091f755d 30 // activate the peripheral
palheart 5:d3d979cbf5b6 31 // uint8_t data[2] = {REG_CTRL_REG_1, 0x01};
palheart 5:d3d979cbf5b6 32 uint8_t data[2] = {REG_CTRL_REG_1, 0x15}; // 0001 0101. 200Hz, low noise, active
palheart 5:d3d979cbf5b6 33 uint8_t dataa[2] = {0x2b, 0x12}; // high resoluition
palheart 5:d3d979cbf5b6 34
samux 1:d2630136d51e 35 writeRegs(data, 2);
palheart 5:d3d979cbf5b6 36 writeRegs(dataa, 2);
palheart 5:d3d979cbf5b6 37
emilmont 0:6149091f755d 38 }
emilmont 0:6149091f755d 39
emilmont 0:6149091f755d 40 MMA8451Q::~MMA8451Q() { }
emilmont 0:6149091f755d 41
emilmont 0:6149091f755d 42 uint8_t MMA8451Q::getWhoAmI() {
emilmont 0:6149091f755d 43 uint8_t who_am_i = 0;
samux 1:d2630136d51e 44 readRegs(REG_WHO_AM_I, &who_am_i, 1);
emilmont 0:6149091f755d 45 return who_am_i;
emilmont 0:6149091f755d 46 }
emilmont 0:6149091f755d 47
palheart 5:d3d979cbf5b6 48 int16_t MMA8451Q::getAccXX() {
palheart 5:d3d979cbf5b6 49 return (getAccAxis(REG_OUT_X_MSB));
palheart 5:d3d979cbf5b6 50 }
palheart 5:d3d979cbf5b6 51
palheart 5:d3d979cbf5b6 52 int16_t MMA8451Q::getAccYY() {
palheart 5:d3d979cbf5b6 53 return (getAccAxis(REG_OUT_Y_MSB));
palheart 5:d3d979cbf5b6 54 }
palheart 5:d3d979cbf5b6 55
palheart 5:d3d979cbf5b6 56
chris 3:db7126dbd63f 57 float MMA8451Q::getAccX() {
chris 3:db7126dbd63f 58 return (float(getAccAxis(REG_OUT_X_MSB))/4096.0);
emilmont 0:6149091f755d 59 }
emilmont 0:6149091f755d 60
chris 3:db7126dbd63f 61 float MMA8451Q::getAccY() {
chris 3:db7126dbd63f 62 return (float(getAccAxis(REG_OUT_Y_MSB))/4096.0);
emilmont 0:6149091f755d 63 }
emilmont 0:6149091f755d 64
chris 3:db7126dbd63f 65 float MMA8451Q::getAccZ() {
chris 3:db7126dbd63f 66 return (float(getAccAxis(REG_OUT_Z_MSB))/4096.0);
emilmont 0:6149091f755d 67 }
emilmont 0:6149091f755d 68
chris 3:db7126dbd63f 69 void MMA8451Q::getAccAllAxis(float * res) {
emilmont 0:6149091f755d 70 res[0] = getAccX();
emilmont 0:6149091f755d 71 res[1] = getAccY();
emilmont 0:6149091f755d 72 res[2] = getAccZ();
emilmont 0:6149091f755d 73 }
emilmont 0:6149091f755d 74
emilmont 0:6149091f755d 75 int16_t MMA8451Q::getAccAxis(uint8_t addr) {
emilmont 0:6149091f755d 76 int16_t acc;
emilmont 0:6149091f755d 77 uint8_t res[2];
samux 1:d2630136d51e 78 readRegs(addr, res, 2);
emilmont 0:6149091f755d 79
emilmont 0:6149091f755d 80 acc = (res[0] << 6) | (res[1] >> 2);
emilmont 0:6149091f755d 81 if (acc > UINT14_MAX/2)
emilmont 0:6149091f755d 82 acc -= UINT14_MAX;
emilmont 0:6149091f755d 83
emilmont 0:6149091f755d 84 return acc;
emilmont 0:6149091f755d 85 }
emilmont 0:6149091f755d 86
samux 1:d2630136d51e 87 void MMA8451Q::readRegs(int addr, uint8_t * data, int len) {
emilmont 0:6149091f755d 88 char t[1] = {addr};
emilmont 0:6149091f755d 89 m_i2c.write(m_addr, t, 1, true);
emilmont 0:6149091f755d 90 m_i2c.read(m_addr, (char *)data, len);
emilmont 0:6149091f755d 91 }
emilmont 0:6149091f755d 92
samux 1:d2630136d51e 93 void MMA8451Q::writeRegs(uint8_t * data, int len) {
emilmont 0:6149091f755d 94 m_i2c.write(m_addr, (char *)data, len);
emilmont 0:6149091f755d 95 }