Jose Escalona / ADXL345

Republished Library, to be refined for use with the SparkFun 9DOF in HARP project.

Dependents:   vmConfort_v6

Fork of ADXL345 by Tyler Weaver

ADXL345.h@4:8046894b947e, 2012-09-17 (annotated)

Committer:
gltest26
Date:
Mon Sep 17 10:39:19 2012 +0000
Revision:
4:8046894b947e
Parent:
3:7b83694c7292
Child:
5:122a504fcfa3
Added bit mask replace version of ADXL345::setDataFormatControl() as an overload.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Digixx 0:1e4aa22fc1a1 1 /**
gltest26 3:7b83694c7292 2 * @file ADXL345.h
Digixx 1:45faba962a46 3 * @author Uwe Gartmann
Digixx 1:45faba962a46 4 * @author Used ITG3200 library developed Peter Swanson as template
Digixx 1:45faba962a46 5 * A special thanks to Ewout van Bekkum for all his patient help in developing this library!
Digixx 0:1e4aa22fc1a1 6 *
Digixx 0:1e4aa22fc1a1 7 * @section LICENSE
Digixx 0:1e4aa22fc1a1 8 *
Digixx 0:1e4aa22fc1a1 9 * Permission is hereby granted, free of charge, to any person obtaining a copy
Digixx 0:1e4aa22fc1a1 10 * of this software and associated documentation files (the "Software"), to deal
Digixx 0:1e4aa22fc1a1 11 * in the Software without restriction, including without limitation the rights
Digixx 0:1e4aa22fc1a1 12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
Digixx 0:1e4aa22fc1a1 13 * copies of the Software, and to permit persons to whom the Software is
Digixx 0:1e4aa22fc1a1 14 * furnished to do so, subject to the following conditions:
Digixx 0:1e4aa22fc1a1 15 *
Digixx 0:1e4aa22fc1a1 16 * The above copyright notice and this permission notice shall be included in
Digixx 0:1e4aa22fc1a1 17 * all copies or substantial portions of the Software.
Digixx 0:1e4aa22fc1a1 18 *
Digixx 0:1e4aa22fc1a1 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
Digixx 0:1e4aa22fc1a1 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
Digixx 0:1e4aa22fc1a1 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
Digixx 0:1e4aa22fc1a1 22 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
Digixx 0:1e4aa22fc1a1 23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
Digixx 0:1e4aa22fc1a1 24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
Digixx 0:1e4aa22fc1a1 25 * THE SOFTWARE.
Digixx 0:1e4aa22fc1a1 26 *
Digixx 0:1e4aa22fc1a1 27 * @section DESCRIPTION
Digixx 0:1e4aa22fc1a1 28 *
Digixx 0:1e4aa22fc1a1 29 * ADXL345, triple axis, I2C interface, accelerometer.
Digixx 0:1e4aa22fc1a1 30 *
Digixx 0:1e4aa22fc1a1 31 * Datasheet:
Digixx 0:1e4aa22fc1a1 32 *
Digixx 0:1e4aa22fc1a1 33 * http://www.analog.com/static/imported-files/data_sheets/ADXL345.pdf
Digixx 0:1e4aa22fc1a1 34 */
Digixx 0:1e4aa22fc1a1 35
Digixx 0:1e4aa22fc1a1 36
Digixx 0:1e4aa22fc1a1 37
Digixx 0:1e4aa22fc1a1 38 #ifndef ADXL345_H
Digixx 0:1e4aa22fc1a1 39 #define ADXL345_H
Digixx 0:1e4aa22fc1a1 40
gltest26 3:7b83694c7292 41 /*
Digixx 0:1e4aa22fc1a1 42 * Includes
Digixx 0:1e4aa22fc1a1 43 */
Digixx 0:1e4aa22fc1a1 44 #include "mbed.h"
Digixx 0:1e4aa22fc1a1 45
gltest26 3:7b83694c7292 46 /*
Digixx 0:1e4aa22fc1a1 47 * Defines
Digixx 0:1e4aa22fc1a1 48 */
Digixx 0:1e4aa22fc1a1 49 //Registers.
Digixx 0:1e4aa22fc1a1 50 #define ADXL345_DEVID_REG 0x00
Digixx 0:1e4aa22fc1a1 51 #define ADXL345_THRESH_TAP_REG 0x1D
Digixx 0:1e4aa22fc1a1 52 #define ADXL345_OFSX_REG 0x1E
Digixx 0:1e4aa22fc1a1 53 #define ADXL345_OFSY_REG 0x1F
Digixx 0:1e4aa22fc1a1 54 #define ADXL345_OFSZ_REG 0x20
Digixx 0:1e4aa22fc1a1 55 #define ADXL345_DUR_REG 0x21
Digixx 0:1e4aa22fc1a1 56 #define ADXL345_LATENT_REG 0x22
Digixx 0:1e4aa22fc1a1 57 #define ADXL345_WINDOW_REG 0x23
Digixx 0:1e4aa22fc1a1 58 #define ADXL345_THRESH_ACT_REG 0x24
Digixx 0:1e4aa22fc1a1 59 #define ADXL345_THRESH_INACT_REG 0x25
Digixx 0:1e4aa22fc1a1 60 #define ADXL345_TIME_INACT_REG 0x26
Digixx 0:1e4aa22fc1a1 61 #define ADXL345_ACT_INACT_CTL_REG 0x27
Digixx 0:1e4aa22fc1a1 62 #define ADXL345_THRESH_FF_REG 0x28
Digixx 0:1e4aa22fc1a1 63 #define ADXL345_TIME_FF_REG 0x29
Digixx 0:1e4aa22fc1a1 64 #define ADXL345_TAP_AXES_REG 0x2A
Digixx 0:1e4aa22fc1a1 65 #define ADXL345_ACT_TAP_STATUS_REG 0x2B
Digixx 0:1e4aa22fc1a1 66 #define ADXL345_BW_RATE_REG 0x2C
Digixx 0:1e4aa22fc1a1 67 #define ADXL345_POWER_CTL_REG 0x2D
Digixx 0:1e4aa22fc1a1 68 #define ADXL345_INT_ENABLE_REG 0x2E
Digixx 0:1e4aa22fc1a1 69 #define ADXL345_INT_MAP_REG 0x2F
Digixx 0:1e4aa22fc1a1 70 #define ADXL345_INT_SOURCE_REG 0x30
Digixx 0:1e4aa22fc1a1 71 #define ADXL345_DATA_FORMAT_REG 0x31
Digixx 0:1e4aa22fc1a1 72 #define ADXL345_DATAX0_REG 0x32
Digixx 0:1e4aa22fc1a1 73 #define ADXL345_DATAX1_REG 0x33
Digixx 0:1e4aa22fc1a1 74 #define ADXL345_DATAY0_REG 0x34
Digixx 0:1e4aa22fc1a1 75 #define ADXL345_DATAY1_REG 0x35
Digixx 0:1e4aa22fc1a1 76 #define ADXL345_DATAZ0_REG 0x36
Digixx 0:1e4aa22fc1a1 77 #define ADXL345_DATAZ1_REG 0x37
Digixx 0:1e4aa22fc1a1 78 #define ADXL345_FIFO_CTL 0x38
Digixx 0:1e4aa22fc1a1 79 #define ADXL345_FIFO_STATUS 0x39
Digixx 0:1e4aa22fc1a1 80
Digixx 0:1e4aa22fc1a1 81 //Data rate codes.
Digixx 0:1e4aa22fc1a1 82 #define ADXL345_3200HZ 0x0F
Digixx 0:1e4aa22fc1a1 83 #define ADXL345_1600HZ 0x0E
Digixx 0:1e4aa22fc1a1 84 #define ADXL345_800HZ 0x0D
Digixx 0:1e4aa22fc1a1 85 #define ADXL345_400HZ 0x0C
Digixx 0:1e4aa22fc1a1 86 #define ADXL345_200HZ 0x0B
Digixx 0:1e4aa22fc1a1 87 #define ADXL345_100HZ 0x0A
Digixx 0:1e4aa22fc1a1 88 #define ADXL345_50HZ 0x09
Digixx 0:1e4aa22fc1a1 89 #define ADXL345_25HZ 0x08
Digixx 0:1e4aa22fc1a1 90 #define ADXL345_12HZ5 0x07
Digixx 0:1e4aa22fc1a1 91 #define ADXL345_6HZ25 0x06
Digixx 0:1e4aa22fc1a1 92
Digixx 0:1e4aa22fc1a1 93 // read or write bytes
Digixx 0:1e4aa22fc1a1 94 #define ADXL345_READ 0xA7
Digixx 0:1e4aa22fc1a1 95 #define ADXL345_WRITE 0xA6
Digixx 0:1e4aa22fc1a1 96 #define ADXL345_ADDRESS 0x53 //the ADXL345 7-bit address is 0x53 when ALT ADDRESS is low as it is on the sparkfun chip: when ALT ADDRESS is high the address is 0x1D
Digixx 0:1e4aa22fc1a1 97
Digixx 0:1e4aa22fc1a1 98 /////////////when ALT ADDRESS pin is high:
Digixx 0:1e4aa22fc1a1 99 //#define ADXL345_READ 0x3B
Digixx 0:1e4aa22fc1a1 100 //#define ADXL345_WRITE 0x3A
Digixx 0:1e4aa22fc1a1 101 //#define ADXL345_ADDRESS 0x1D
Digixx 0:1e4aa22fc1a1 102
Digixx 0:1e4aa22fc1a1 103 #define ADXL345_X 0x00
Digixx 0:1e4aa22fc1a1 104 #define ADXL345_Y 0x01
Digixx 0:1e4aa22fc1a1 105 #define ADXL345_Z 0x02
Digixx 0:1e4aa22fc1a1 106
Digixx 0:1e4aa22fc1a1 107
Digixx 0:1e4aa22fc1a1 108
Digixx 0:1e4aa22fc1a1 109 // modes
Digixx 0:1e4aa22fc1a1 110 #define MeasurementMode 0x08
Digixx 0:1e4aa22fc1a1 111
Digixx 0:1e4aa22fc1a1 112
Digixx 0:1e4aa22fc1a1 113
Digixx 0:1e4aa22fc1a1 114
Digixx 0:1e4aa22fc1a1 115
Digixx 0:1e4aa22fc1a1 116
gltest26 3:7b83694c7292 117 /**
gltest26 3:7b83694c7292 118 * ADXL345 triple axis accelerometer.
gltest26 3:7b83694c7292 119 */
Digixx 0:1e4aa22fc1a1 120 class ADXL345 {
Digixx 0:1e4aa22fc1a1 121
Digixx 0:1e4aa22fc1a1 122 public:
Digixx 0:1e4aa22fc1a1 123
gltest26 4:8046894b947e 124 static const char RANGE_BITS = 0x3;
gltest26 4:8046894b947e 125 static const char RANGE_2G = 0x0;
gltest26 4:8046894b947e 126 static const char RANGE_4G = 0x1;
gltest26 4:8046894b947e 127 static const char RANGE_8G = 0x2;
gltest26 4:8046894b947e 128 static const char RANGE_16G = 0x3;
gltest26 4:8046894b947e 129
Digixx 0:1e4aa22fc1a1 130 /**
Digixx 0:1e4aa22fc1a1 131 * Constructor.
Digixx 0:1e4aa22fc1a1 132 *
Digixx 0:1e4aa22fc1a1 133 * @param mosi mbed pin to use for SDA line of I2C interface.
Digixx 0:1e4aa22fc1a1 134 * @param sck mbed pin to use for SCL line of I2C interface.
Digixx 0:1e4aa22fc1a1 135 */
Digixx 0:1e4aa22fc1a1 136 ADXL345(PinName sda, PinName scl);
Digixx 0:1e4aa22fc1a1 137
Digixx 0:1e4aa22fc1a1 138 /**
Digixx 0:1e4aa22fc1a1 139 * Get the output of all three axes.
Digixx 0:1e4aa22fc1a1 140 *
Digixx 0:1e4aa22fc1a1 141 * @param Pointer to a buffer to hold the accelerometer value for the
Digixx 0:1e4aa22fc1a1 142 * x-axis, y-axis and z-axis [in that order].
Digixx 0:1e4aa22fc1a1 143 */
Digixx 0:1e4aa22fc1a1 144 void getOutput(int* readings);
Digixx 0:1e4aa22fc1a1 145
Digixx 0:1e4aa22fc1a1 146 /**
Digixx 0:1e4aa22fc1a1 147 * Read the device ID register on the device.
Digixx 0:1e4aa22fc1a1 148 *
Digixx 0:1e4aa22fc1a1 149 * @return The device ID code [0xE5]
Digixx 0:1e4aa22fc1a1 150 */
Digixx 0:1e4aa22fc1a1 151 char getDeviceID(void);
Digixx 0:1e4aa22fc1a1 152
Digixx 0:1e4aa22fc1a1 153 /**
Digixx 0:1e4aa22fc1a1 154 * Set the power mode.
Digixx 0:1e4aa22fc1a1 155 *
Digixx 0:1e4aa22fc1a1 156 * @param mode 0 -> Normal operation.
Digixx 0:1e4aa22fc1a1 157 * 1 -> Reduced power operation.
Digixx 0:1e4aa22fc1a1 158 */
Digixx 0:1e4aa22fc1a1 159 int setPowerMode(char mode);
Digixx 0:1e4aa22fc1a1 160
Digixx 0:1e4aa22fc1a1 161 /**
Digixx 0:1e4aa22fc1a1 162 * Set the power control settings.
Digixx 0:1e4aa22fc1a1 163 *
Digixx 0:1e4aa22fc1a1 164 * See datasheet for details.
Digixx 0:1e4aa22fc1a1 165 *
Digixx 0:1e4aa22fc1a1 166 * @param The control byte to write to the POWER_CTL register.
Digixx 0:1e4aa22fc1a1 167 */
Digixx 0:1e4aa22fc1a1 168 int setPowerControl(char settings);
Digixx 0:1e4aa22fc1a1 169 /**
Digixx 0:1e4aa22fc1a1 170 * Get the power control settings.
Digixx 0:1e4aa22fc1a1 171 *
Digixx 0:1e4aa22fc1a1 172 * See datasheet for details.
Digixx 0:1e4aa22fc1a1 173 *
Digixx 0:1e4aa22fc1a1 174 * @return The contents of the POWER_CTL register.
Digixx 0:1e4aa22fc1a1 175 */
Digixx 0:1e4aa22fc1a1 176 char getPowerControl(void);
Digixx 0:1e4aa22fc1a1 177
Digixx 0:1e4aa22fc1a1 178
Digixx 0:1e4aa22fc1a1 179 /**
Digixx 0:1e4aa22fc1a1 180 * Get the data format settings.
Digixx 0:1e4aa22fc1a1 181 *
Digixx 0:1e4aa22fc1a1 182 * @return The contents of the DATA_FORMAT register.
Digixx 0:1e4aa22fc1a1 183 */
Digixx 0:1e4aa22fc1a1 184
Digixx 0:1e4aa22fc1a1 185 char getDataFormatControl(void);
Digixx 0:1e4aa22fc1a1 186
Digixx 0:1e4aa22fc1a1 187 /**
Digixx 0:1e4aa22fc1a1 188 * Set the data format settings.
Digixx 0:1e4aa22fc1a1 189 *
Digixx 0:1e4aa22fc1a1 190 * @param settings The control byte to write to the DATA_FORMAT register.
Digixx 0:1e4aa22fc1a1 191 */
Digixx 0:1e4aa22fc1a1 192 int setDataFormatControl(char settings);
gltest26 4:8046894b947e 193
gltest26 4:8046894b947e 194 /**
gltest26 4:8046894b947e 195 * Set the data format settings with only specified bits.
gltest26 4:8046894b947e 196 *
gltest26 4:8046894b947e 197 * @param settings The control byte to write to the DATA_FORMAT register.
gltest26 4:8046894b947e 198 * @param mask The mask bits that
gltest26 4:8046894b947e 199 */
gltest26 4:8046894b947e 200 int setDataFormatControl(char settings, char mask, char *prev = NULL);
Digixx 0:1e4aa22fc1a1 201
gltest26 4:8046894b947e 202 /**
Digixx 0:1e4aa22fc1a1 203 * Set the data rate.
Digixx 0:1e4aa22fc1a1 204 *
Digixx 0:1e4aa22fc1a1 205 * @param rate The rate code (see #defines or datasheet).
Digixx 0:1e4aa22fc1a1 206 */
Digixx 0:1e4aa22fc1a1 207 int setDataRate(char rate);
Digixx 0:1e4aa22fc1a1 208
Digixx 0:1e4aa22fc1a1 209
Digixx 0:1e4aa22fc1a1 210 /**
Digixx 0:1e4aa22fc1a1 211 * Get the current offset for a particular axis.
Digixx 0:1e4aa22fc1a1 212 *
Digixx 0:1e4aa22fc1a1 213 * @param axis 0x00 -> X-axis
Digixx 0:1e4aa22fc1a1 214 * 0x01 -> Y-axis
Digixx 0:1e4aa22fc1a1 215 * 0x02 -> Z-axis
Digixx 0:1e4aa22fc1a1 216 * @return The current offset as an 8-bit 2's complement number with scale
Digixx 0:1e4aa22fc1a1 217 * factor 15.6mg/LSB.
Digixx 0:1e4aa22fc1a1 218 */
Digixx 0:1e4aa22fc1a1 219
Digixx 0:1e4aa22fc1a1 220 char getOffset(char axis);
Digixx 0:1e4aa22fc1a1 221
Digixx 0:1e4aa22fc1a1 222 /**
Digixx 0:1e4aa22fc1a1 223 * Set the offset for a particular axis.
Digixx 0:1e4aa22fc1a1 224 *
Digixx 0:1e4aa22fc1a1 225 * @param axis 0x00 -> X-axis
Digixx 0:1e4aa22fc1a1 226 * 0x01 -> Y-axis
Digixx 0:1e4aa22fc1a1 227 * 0x02 -> Z-axis
Digixx 0:1e4aa22fc1a1 228 * @param offset The offset as an 8-bit 2's complement number with scale
Digixx 0:1e4aa22fc1a1 229 * factor 15.6mg/LSB.
Digixx 0:1e4aa22fc1a1 230 */
Digixx 0:1e4aa22fc1a1 231 int setOffset(char axis, char offset);
Digixx 0:1e4aa22fc1a1 232
Digixx 0:1e4aa22fc1a1 233 /**
Digixx 0:1e4aa22fc1a1 234 * Get the FIFO control settings.
Digixx 0:1e4aa22fc1a1 235 *
Digixx 0:1e4aa22fc1a1 236 * @return The contents of the FIFO_CTL register.
Digixx 0:1e4aa22fc1a1 237 */
Digixx 0:1e4aa22fc1a1 238 char getFifoControl(void);
Digixx 0:1e4aa22fc1a1 239
Digixx 0:1e4aa22fc1a1 240 /**
Digixx 0:1e4aa22fc1a1 241 * Set the FIFO control settings.
Digixx 0:1e4aa22fc1a1 242 *
Digixx 0:1e4aa22fc1a1 243 * @param The control byte to write to the FIFO_CTL register.
Digixx 0:1e4aa22fc1a1 244 */
Digixx 0:1e4aa22fc1a1 245 int setFifoControl(char settings);
Digixx 0:1e4aa22fc1a1 246
Digixx 0:1e4aa22fc1a1 247 /**
Digixx 0:1e4aa22fc1a1 248 * Get FIFO status.
Digixx 0:1e4aa22fc1a1 249 *
Digixx 0:1e4aa22fc1a1 250 * @return The contents of the FIFO_STATUS register.
Digixx 0:1e4aa22fc1a1 251 */
Digixx 0:1e4aa22fc1a1 252 char getFifoStatus(void);
Digixx 0:1e4aa22fc1a1 253
Digixx 0:1e4aa22fc1a1 254 /**
Digixx 0:1e4aa22fc1a1 255 * Read the tap threshold on the device.
Digixx 0:1e4aa22fc1a1 256 *
Digixx 0:1e4aa22fc1a1 257 * @return The tap threshold as an 8-bit number with a scale factor of
Digixx 0:1e4aa22fc1a1 258 * 62.5mg/LSB.
Digixx 0:1e4aa22fc1a1 259 */
Digixx 0:1e4aa22fc1a1 260 char getTapThreshold(void);
Digixx 0:1e4aa22fc1a1 261
Digixx 0:1e4aa22fc1a1 262 /**
Digixx 0:1e4aa22fc1a1 263 * Set the tap threshold.
Digixx 0:1e4aa22fc1a1 264 *
Digixx 0:1e4aa22fc1a1 265 * @param The tap threshold as an 8-bit number with a scale factor of
Digixx 0:1e4aa22fc1a1 266 * 62.5mg/LSB.
Digixx 0:1e4aa22fc1a1 267 */
Digixx 0:1e4aa22fc1a1 268 int setTapThreshold(char threshold);
Digixx 0:1e4aa22fc1a1 269
Digixx 0:1e4aa22fc1a1 270 /**
Digixx 0:1e4aa22fc1a1 271 * Get the tap duration required to trigger an event.
Digixx 0:1e4aa22fc1a1 272 *
Digixx 0:1e4aa22fc1a1 273 * @return The max time that an event must be above the tap threshold to
Digixx 0:1e4aa22fc1a1 274 * qualify as a tap event, in microseconds.
Digixx 0:1e4aa22fc1a1 275 */
Digixx 0:1e4aa22fc1a1 276 float getTapDuration(void);
Digixx 0:1e4aa22fc1a1 277
Digixx 0:1e4aa22fc1a1 278 /**
Digixx 0:1e4aa22fc1a1 279 * Set the tap duration required to trigger an event.
Digixx 0:1e4aa22fc1a1 280 *
Digixx 0:1e4aa22fc1a1 281 * @param duration_us The max time that an event must be above the tap
Digixx 0:1e4aa22fc1a1 282 * threshold to qualify as a tap event, in microseconds.
Digixx 0:1e4aa22fc1a1 283 * Time will be normalized by the scale factor which is
Digixx 0:1e4aa22fc1a1 284 * 625us/LSB. A value of 0 disables the single/double
Digixx 0:1e4aa22fc1a1 285 * tap functions.
Digixx 0:1e4aa22fc1a1 286 */
Digixx 0:1e4aa22fc1a1 287 int setTapDuration(short int duration_us);
Digixx 0:1e4aa22fc1a1 288
Digixx 0:1e4aa22fc1a1 289 /**
Digixx 0:1e4aa22fc1a1 290 * Get the tap latency between the detection of a tap and the time window.
Digixx 0:1e4aa22fc1a1 291 *
Digixx 0:1e4aa22fc1a1 292 * @return The wait time from the detection of a tap event to the start of
Digixx 0:1e4aa22fc1a1 293 * the time window during which a possible second tap event can be
Digixx 0:1e4aa22fc1a1 294 * detected in milliseconds.
Digixx 0:1e4aa22fc1a1 295 */
Digixx 0:1e4aa22fc1a1 296 float getTapLatency(void);
Digixx 0:1e4aa22fc1a1 297
Digixx 0:1e4aa22fc1a1 298 /**
Digixx 0:1e4aa22fc1a1 299 * Set the tap latency between the detection of a tap and the time window.
Digixx 0:1e4aa22fc1a1 300 *
Digixx 0:1e4aa22fc1a1 301 * @param latency_ms The wait time from the detection of a tap event to the
Digixx 0:1e4aa22fc1a1 302 * start of the time window during which a possible
Digixx 0:1e4aa22fc1a1 303 * second tap event can be detected in milliseconds.
Digixx 0:1e4aa22fc1a1 304 * A value of 0 disables the double tap function.
Digixx 0:1e4aa22fc1a1 305 */
Digixx 0:1e4aa22fc1a1 306 int setTapLatency(short int latency_ms);
Digixx 0:1e4aa22fc1a1 307
Digixx 0:1e4aa22fc1a1 308 /**
Digixx 0:1e4aa22fc1a1 309 * Get the time of window between tap latency and a double tap.
Digixx 0:1e4aa22fc1a1 310 *
Digixx 0:1e4aa22fc1a1 311 * @return The amount of time after the expiration of the latency time
Digixx 0:1e4aa22fc1a1 312 * during which a second valid tap can begin, in milliseconds.
Digixx 0:1e4aa22fc1a1 313 */
Digixx 0:1e4aa22fc1a1 314 float getWindowTime(void);
Digixx 0:1e4aa22fc1a1 315
Digixx 0:1e4aa22fc1a1 316 /**
Digixx 0:1e4aa22fc1a1 317 * Set the time of the window between tap latency and a double tap.
Digixx 0:1e4aa22fc1a1 318 *
Digixx 0:1e4aa22fc1a1 319 * @param window_ms The amount of time after the expiration of the latency
Digixx 0:1e4aa22fc1a1 320 * time during which a second valid tap can begin,
Digixx 0:1e4aa22fc1a1 321 * in milliseconds.
Digixx 0:1e4aa22fc1a1 322 */
Digixx 0:1e4aa22fc1a1 323 int setWindowTime(short int window_ms);
Digixx 0:1e4aa22fc1a1 324
Digixx 0:1e4aa22fc1a1 325 /**
Digixx 0:1e4aa22fc1a1 326 * Get the threshold value for detecting activity.
Digixx 0:1e4aa22fc1a1 327 *
Digixx 0:1e4aa22fc1a1 328 * @return The threshold value for detecting activity as an 8-bit number.
Digixx 0:1e4aa22fc1a1 329 * Scale factor is 62.5mg/LSB.
Digixx 0:1e4aa22fc1a1 330 */
Digixx 0:1e4aa22fc1a1 331 char getActivityThreshold(void);
Digixx 0:1e4aa22fc1a1 332
Digixx 0:1e4aa22fc1a1 333 /**
Digixx 0:1e4aa22fc1a1 334 * Set the threshold value for detecting activity.
Digixx 0:1e4aa22fc1a1 335 *
Digixx 0:1e4aa22fc1a1 336 * @param threshold The threshold value for detecting activity as an 8-bit
Digixx 0:1e4aa22fc1a1 337 * number. Scale factor is 62.5mg/LSB. A value of 0 may
Digixx 0:1e4aa22fc1a1 338 * result in undesirable behavior if the activity
Digixx 0:1e4aa22fc1a1 339 * interrupt is enabled.
Digixx 0:1e4aa22fc1a1 340 */
Digixx 0:1e4aa22fc1a1 341 int setActivityThreshold(char threshold);
Digixx 0:1e4aa22fc1a1 342
Digixx 0:1e4aa22fc1a1 343 /**
Digixx 0:1e4aa22fc1a1 344 * Get the threshold value for detecting inactivity.
Digixx 0:1e4aa22fc1a1 345 *
Digixx 0:1e4aa22fc1a1 346 * @return The threshold value for detecting inactivity as an 8-bit number.
Digixx 0:1e4aa22fc1a1 347 * Scale factor is 62.5mg/LSB.
Digixx 0:1e4aa22fc1a1 348 */
Digixx 0:1e4aa22fc1a1 349 char getInactivityThreshold(void);
Digixx 0:1e4aa22fc1a1 350
Digixx 0:1e4aa22fc1a1 351 /**
Digixx 0:1e4aa22fc1a1 352 * Set the threshold value for detecting inactivity.
Digixx 0:1e4aa22fc1a1 353 *
Digixx 0:1e4aa22fc1a1 354 * @param threshold The threshold value for detecting inactivity as an
Digixx 0:1e4aa22fc1a1 355 * 8-bit number. Scale factor is 62.5mg/LSB.
Digixx 0:1e4aa22fc1a1 356 */
Digixx 0:1e4aa22fc1a1 357 int setInactivityThreshold(char threshold);
Digixx 0:1e4aa22fc1a1 358
Digixx 0:1e4aa22fc1a1 359 /**
Digixx 0:1e4aa22fc1a1 360 * Get the time required for inactivity to be declared.
Digixx 0:1e4aa22fc1a1 361 *
Digixx 0:1e4aa22fc1a1 362 * @return The amount of time that acceleration must be less than the
Digixx 0:1e4aa22fc1a1 363 * inactivity threshold for inactivity to be declared, in
Digixx 0:1e4aa22fc1a1 364 * seconds.
Digixx 0:1e4aa22fc1a1 365 */
Digixx 0:1e4aa22fc1a1 366 char getTimeInactivity(void);
Digixx 0:1e4aa22fc1a1 367
Digixx 0:1e4aa22fc1a1 368 /**
Digixx 0:1e4aa22fc1a1 369 * Set the time required for inactivity to be declared.
Digixx 0:1e4aa22fc1a1 370 *
Digixx 0:1e4aa22fc1a1 371 * @param inactivity The amount of time that acceleration must be less than
Digixx 0:1e4aa22fc1a1 372 * the inactivity threshold for inactivity to be
Digixx 0:1e4aa22fc1a1 373 * declared, in seconds. A value of 0 results in an
Digixx 0:1e4aa22fc1a1 374 * interrupt when the output data is less than the
Digixx 0:1e4aa22fc1a1 375 * threshold inactivity.
Digixx 0:1e4aa22fc1a1 376 */
Digixx 0:1e4aa22fc1a1 377 int setTimeInactivity(char timeInactivity);
Digixx 0:1e4aa22fc1a1 378
Digixx 0:1e4aa22fc1a1 379 /**
Digixx 0:1e4aa22fc1a1 380 * Get the activity/inactivity control settings.
Digixx 0:1e4aa22fc1a1 381 *
Digixx 0:1e4aa22fc1a1 382 * D7 D6 D5 D4
Digixx 0:1e4aa22fc1a1 383 * +-----------+--------------+--------------+--------------+
Digixx 0:1e4aa22fc1a1 384 * | ACT ac/dc | ACT_X enable | ACT_Y enable | ACT_Z enable |
Digixx 0:1e4aa22fc1a1 385 * +-----------+--------------+--------------+--------------+
Digixx 0:1e4aa22fc1a1 386 *
Digixx 0:1e4aa22fc1a1 387 * D3 D2 D1 D0
Digixx 0:1e4aa22fc1a1 388 * +-------------+----------------+----------------+----------------+
Digixx 0:1e4aa22fc1a1 389 * | INACT ac/dc | INACT_X enable | INACT_Y enable | INACT_Z enable |
Digixx 0:1e4aa22fc1a1 390 * +-------------+----------------+----------------+----------------+
Digixx 0:1e4aa22fc1a1 391 *
Digixx 0:1e4aa22fc1a1 392 * See datasheet for details.
Digixx 0:1e4aa22fc1a1 393 *
Digixx 0:1e4aa22fc1a1 394 * @return The contents of the ACT_INACT_CTL register.
Digixx 0:1e4aa22fc1a1 395 */
Digixx 0:1e4aa22fc1a1 396 char getActivityInactivityControl(void);
Digixx 0:1e4aa22fc1a1 397
Digixx 0:1e4aa22fc1a1 398 /**
Digixx 0:1e4aa22fc1a1 399 * Set the activity/inactivity control settings.
Digixx 0:1e4aa22fc1a1 400 *
Digixx 0:1e4aa22fc1a1 401 * D7 D6 D5 D4
Digixx 0:1e4aa22fc1a1 402 * +-----------+--------------+--------------+--------------+
Digixx 0:1e4aa22fc1a1 403 * | ACT ac/dc | ACT_X enable | ACT_Y enable | ACT_Z enable |
Digixx 0:1e4aa22fc1a1 404 * +-----------+--------------+--------------+--------------+
Digixx 0:1e4aa22fc1a1 405 *
Digixx 0:1e4aa22fc1a1 406 * D3 D2 D1 D0
Digixx 0:1e4aa22fc1a1 407 * +-------------+----------------+----------------+----------------+
Digixx 0:1e4aa22fc1a1 408 * | INACT ac/dc | INACT_X enable | INACT_Y enable | INACT_Z enable |
Digixx 0:1e4aa22fc1a1 409 * +-------------+----------------+----------------+----------------+
Digixx 0:1e4aa22fc1a1 410 *
Digixx 0:1e4aa22fc1a1 411 * See datasheet for details.
Digixx 0:1e4aa22fc1a1 412 *
Digixx 0:1e4aa22fc1a1 413 * @param settings The control byte to write to the ACT_INACT_CTL register.
Digixx 0:1e4aa22fc1a1 414 */
Digixx 0:1e4aa22fc1a1 415 int setActivityInactivityControl(char settings);
Digixx 0:1e4aa22fc1a1 416
Digixx 0:1e4aa22fc1a1 417 /**
Digixx 0:1e4aa22fc1a1 418 * Get the threshold for free fall detection.
Digixx 0:1e4aa22fc1a1 419 *
Digixx 0:1e4aa22fc1a1 420 * @return The threshold value for free-fall detection, as an 8-bit number,
Digixx 0:1e4aa22fc1a1 421 * with scale factor 62.5mg/LSB.
Digixx 0:1e4aa22fc1a1 422 */
Digixx 0:1e4aa22fc1a1 423 char getFreefallThreshold(void);
Digixx 0:1e4aa22fc1a1 424
Digixx 0:1e4aa22fc1a1 425 /**
Digixx 0:1e4aa22fc1a1 426 * Set the threshold for free fall detection.
Digixx 0:1e4aa22fc1a1 427 *
Digixx 0:1e4aa22fc1a1 428 * @return The threshold value for free-fall detection, as an 8-bit number,
Digixx 0:1e4aa22fc1a1 429 * with scale factor 62.5mg/LSB. A value of 0 may result in
Digixx 0:1e4aa22fc1a1 430 * undesirable behavior if the free-fall interrupt is enabled.
Digixx 0:1e4aa22fc1a1 431 * Values between 300 mg and 600 mg (0x05 to 0x09) are recommended.
Digixx 0:1e4aa22fc1a1 432 */
Digixx 0:1e4aa22fc1a1 433 int setFreefallThreshold(char threshold);
Digixx 0:1e4aa22fc1a1 434
Digixx 0:1e4aa22fc1a1 435 /**
Digixx 0:1e4aa22fc1a1 436 * Get the time required to generate a free fall interrupt.
Digixx 0:1e4aa22fc1a1 437 *
Digixx 0:1e4aa22fc1a1 438 * @return The minimum time that the value of all axes must be less than
Digixx 0:1e4aa22fc1a1 439 * the freefall threshold to generate a free-fall interrupt, in
Digixx 0:1e4aa22fc1a1 440 * milliseconds.
Digixx 0:1e4aa22fc1a1 441 */
Digixx 0:1e4aa22fc1a1 442 char getFreefallTime(void);
Digixx 0:1e4aa22fc1a1 443
Digixx 0:1e4aa22fc1a1 444 /**
Digixx 0:1e4aa22fc1a1 445 * Set the time required to generate a free fall interrupt.
Digixx 0:1e4aa22fc1a1 446 *
Digixx 0:1e4aa22fc1a1 447 * @return The minimum time that the value of all axes must be less than
Digixx 0:1e4aa22fc1a1 448 * the freefall threshold to generate a free-fall interrupt, in
Digixx 0:1e4aa22fc1a1 449 * milliseconds. A value of 0 may result in undesirable behavior
Digixx 0:1e4aa22fc1a1 450 * if the free-fall interrupt is enabled. Values between 100 ms
Digixx 0:1e4aa22fc1a1 451 * and 350 ms (0x14 to 0x46) are recommended.
Digixx 0:1e4aa22fc1a1 452 */
Digixx 0:1e4aa22fc1a1 453 int setFreefallTime(short int freefallTime_ms);
Digixx 0:1e4aa22fc1a1 454
Digixx 0:1e4aa22fc1a1 455 /**
Digixx 0:1e4aa22fc1a1 456 * Get the axis tap settings.
Digixx 0:1e4aa22fc1a1 457 *
Digixx 0:1e4aa22fc1a1 458 * D3 D2 D1 D0
Digixx 0:1e4aa22fc1a1 459 * +----------+--------------+--------------+--------------+
Digixx 0:1e4aa22fc1a1 460 * | Suppress | TAP_X enable | TAP_Y enable | TAP_Z enable |
Digixx 0:1e4aa22fc1a1 461 * +----------+--------------+--------------+--------------+
Digixx 0:1e4aa22fc1a1 462 *
Digixx 0:1e4aa22fc1a1 463 * (D7-D4 are 0s).
Digixx 0:1e4aa22fc1a1 464 *
Digixx 0:1e4aa22fc1a1 465 * See datasheet for more details.
Digixx 0:1e4aa22fc1a1 466 *
Digixx 0:1e4aa22fc1a1 467 * @return The contents of the TAP_AXES register.
Digixx 0:1e4aa22fc1a1 468 */
Digixx 0:1e4aa22fc1a1 469 char getTapAxisControl(void);
Digixx 0:1e4aa22fc1a1 470
Digixx 0:1e4aa22fc1a1 471 /**
Digixx 0:1e4aa22fc1a1 472 * Set the axis tap settings.
Digixx 0:1e4aa22fc1a1 473 *
Digixx 0:1e4aa22fc1a1 474 * D3 D2 D1 D0
Digixx 0:1e4aa22fc1a1 475 * +----------+--------------+--------------+--------------+
Digixx 0:1e4aa22fc1a1 476 * | Suppress | TAP_X enable | TAP_Y enable | TAP_Z enable |
Digixx 0:1e4aa22fc1a1 477 * +----------+--------------+--------------+--------------+
Digixx 0:1e4aa22fc1a1 478 *
Digixx 0:1e4aa22fc1a1 479 * (D7-D4 are 0s).
Digixx 0:1e4aa22fc1a1 480 *
Digixx 0:1e4aa22fc1a1 481 * See datasheet for more details.
Digixx 0:1e4aa22fc1a1 482 *
Digixx 0:1e4aa22fc1a1 483 * @param The control byte to write to the TAP_AXES register.
Digixx 0:1e4aa22fc1a1 484 */
Digixx 0:1e4aa22fc1a1 485 int setTapAxisControl(char settings);
Digixx 0:1e4aa22fc1a1 486
Digixx 0:1e4aa22fc1a1 487 /**
Digixx 0:1e4aa22fc1a1 488 * Get the source of a tap.
Digixx 0:1e4aa22fc1a1 489 *
Digixx 0:1e4aa22fc1a1 490 * @return The contents of the ACT_TAP_STATUS register.
Digixx 0:1e4aa22fc1a1 491 */
Digixx 0:1e4aa22fc1a1 492 char getTapSource(void);
Digixx 0:1e4aa22fc1a1 493
Digixx 0:1e4aa22fc1a1 494 /**
Digixx 0:1e4aa22fc1a1 495 * Get the interrupt enable settings.
Digixx 0:1e4aa22fc1a1 496 *
Digixx 0:1e4aa22fc1a1 497 * @return The contents of the INT_ENABLE register.
Digixx 0:1e4aa22fc1a1 498 */
Digixx 0:1e4aa22fc1a1 499
Digixx 0:1e4aa22fc1a1 500 char getInterruptEnableControl(void);
Digixx 0:1e4aa22fc1a1 501
Digixx 0:1e4aa22fc1a1 502 /**
Digixx 0:1e4aa22fc1a1 503 * Set the interrupt enable settings.
Digixx 0:1e4aa22fc1a1 504 *
Digixx 0:1e4aa22fc1a1 505 * @param settings The control byte to write to the INT_ENABLE register.
Digixx 0:1e4aa22fc1a1 506 */
Digixx 0:1e4aa22fc1a1 507 int setInterruptEnableControl(char settings);
Digixx 0:1e4aa22fc1a1 508
Digixx 0:1e4aa22fc1a1 509 /**
Digixx 0:1e4aa22fc1a1 510 * Get the interrupt mapping settings.
Digixx 0:1e4aa22fc1a1 511 *
Digixx 0:1e4aa22fc1a1 512 * @return The contents of the INT_MAP register.
Digixx 0:1e4aa22fc1a1 513 */
Digixx 0:1e4aa22fc1a1 514 char getInterruptMappingControl(void);
Digixx 0:1e4aa22fc1a1 515
Digixx 0:1e4aa22fc1a1 516 /**
Digixx 0:1e4aa22fc1a1 517 * Set the interrupt mapping settings.
Digixx 0:1e4aa22fc1a1 518 *
Digixx 0:1e4aa22fc1a1 519 * @param settings The control byte to write to the INT_MAP register.
Digixx 0:1e4aa22fc1a1 520 */
Digixx 0:1e4aa22fc1a1 521 int setInterruptMappingControl(char settings);
Digixx 0:1e4aa22fc1a1 522
Digixx 0:1e4aa22fc1a1 523 /**
Digixx 0:1e4aa22fc1a1 524 * Get the interrupt source.
Digixx 0:1e4aa22fc1a1 525 *
Digixx 0:1e4aa22fc1a1 526 * @return The contents of the INT_SOURCE register.
Digixx 0:1e4aa22fc1a1 527 */
Digixx 0:1e4aa22fc1a1 528 char getInterruptSource(void);
Digixx 0:1e4aa22fc1a1 529
Digixx 0:1e4aa22fc1a1 530
Digixx 0:1e4aa22fc1a1 531 private:
Digixx 0:1e4aa22fc1a1 532
Digixx 0:1e4aa22fc1a1 533 I2C i2c_;
Digixx 0:1e4aa22fc1a1 534
Digixx 0:1e4aa22fc1a1 535
Digixx 0:1e4aa22fc1a1 536 /**
Digixx 0:1e4aa22fc1a1 537 * Read one byte from a register on the device.
Digixx 0:1e4aa22fc1a1 538 *
Digixx 0:1e4aa22fc1a1 539 * @param: - the address to be read from
Digixx 0:1e4aa22fc1a1 540 *
Digixx 0:1e4aa22fc1a1 541 * @return: the value of the data read
Digixx 0:1e4aa22fc1a1 542 */
Digixx 0:1e4aa22fc1a1 543 char SingleByteRead(char address);
Digixx 0:1e4aa22fc1a1 544
Digixx 0:1e4aa22fc1a1 545 /**
Digixx 0:1e4aa22fc1a1 546 * Write one byte to a register on the device.
Digixx 0:1e4aa22fc1a1 547 *
Digixx 0:1e4aa22fc1a1 548 * @param:
Digixx 0:1e4aa22fc1a1 549 - address of the register to write to.
Digixx 0:1e4aa22fc1a1 550 - the value of the data to store
Digixx 0:1e4aa22fc1a1 551 */
gltest26 4:8046894b947e 552 int SingleByteWrite(char address, char data);
Digixx 0:1e4aa22fc1a1 553
Digixx 0:1e4aa22fc1a1 554 /**
Digixx 0:1e4aa22fc1a1 555 * Read several consecutive bytes on the device and store them in a given location.
Digixx 0:1e4aa22fc1a1 556 *
Digixx 0:1e4aa22fc1a1 557 * @param startAddress: The address of the first register to read from.
Digixx 0:1e4aa22fc1a1 558 * @param ptr_output: a pointer to the location to store the data being read
Digixx 0:1e4aa22fc1a1 559 * @param size: The number of bytes to read.
Digixx 0:1e4aa22fc1a1 560 */
Digixx 0:1e4aa22fc1a1 561 void multiByteRead(char startAddress, char* ptr_output, int size);
Digixx 0:1e4aa22fc1a1 562
Digixx 0:1e4aa22fc1a1 563 /**
Digixx 0:1e4aa22fc1a1 564 * Write several consecutive bytes on the device.
Digixx 0:1e4aa22fc1a1 565 *
Digixx 0:1e4aa22fc1a1 566 * @param startAddress: The address of the first register to write to.
Digixx 0:1e4aa22fc1a1 567 * @param ptr_data: Pointer to a location which contains the data to write.
Digixx 0:1e4aa22fc1a1 568 * @param size: The number of bytes to write.
Digixx 0:1e4aa22fc1a1 569 */
Digixx 0:1e4aa22fc1a1 570 int multiByteWrite(char startAddress, char* ptr_data, int size);
Digixx 0:1e4aa22fc1a1 571
gltest26 3:7b83694c7292 572 private:
gltest26 3:7b83694c7292 573
gltest26 3:7b83694c7292 574 /**
gltest26 3:7b83694c7292 575 * Converts little-endian 2's complement byte pair to native byte order of
gltest26 3:7b83694c7292 576 * the CPU and then sign extend it to the CPU's register size.
gltest26 3:7b83694c7292 577 *
gltest26 3:7b83694c7292 578 * Implemented here to make the compiler inline expand it.
gltest26 3:7b83694c7292 579 */
gltest26 3:7b83694c7292 580 static int wordExtend(const char rx[2]){
gltest26 3:7b83694c7292 581 // Readings are expressed in 16bit 2's complement, so we must first
gltest26 3:7b83694c7292 582 // concatenate two bytes to make a word and sign extend it to obtain
gltest26 3:7b83694c7292 583 // correct negative values.
gltest26 3:7b83694c7292 584 // ARMCC compiles char as unsigned, which means no sign extension is
gltest26 3:7b83694c7292 585 // performed during bitwise operations to chars. But we should make sure
gltest26 3:7b83694c7292 586 // that lower byte won't extend its sign past upper byte for other
gltest26 3:7b83694c7292 587 // compilers if we want to keep it portable.
gltest26 3:7b83694c7292 588 return int16_t(((unsigned char)rx[1] << 8) | (unsigned char)rx[0]);
gltest26 3:7b83694c7292 589 }
gltest26 3:7b83694c7292 590
Digixx 0:1e4aa22fc1a1 591 };
Digixx 0:1e4aa22fc1a1 592
Digixx 0:1e4aa22fc1a1 593 #endif /* ADXL345_H */