Mark Gottscho / SensorsLib

A compilation of some hardware sensors and their shared programming interfaces.

MMA8451Q.h@1:15396cab58d1, 2014-03-19 (annotated)

Committer:
mgottscho
Date:
Wed Mar 19 00:35:31 2014 +0000
Revision:
1:15396cab58d1
Parent:
0:8d34cc2ff388 
Updated for most recent UtilityLib.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mgottscho 0:8d34cc2ff388 1 /* MMA8451Q.h
mgottscho 0:8d34cc2ff388 2 * Tested with mbed board: FRDM-KL46Z
mgottscho 0:8d34cc2ff388 3 * Author: Mark Gottscho
mgottscho 0:8d34cc2ff388 4 * mgottscho@ucla.edu
mgottscho 0:8d34cc2ff388 5 */
mgottscho 0:8d34cc2ff388 6
mgottscho 0:8d34cc2ff388 7 #ifndef MMA8451Q_H
mgottscho 0:8d34cc2ff388 8 #define MMA8451Q_H
mgottscho 0:8d34cc2ff388 9
mgottscho 0:8d34cc2ff388 10 #include "mbed.h"
mgottscho 0:8d34cc2ff388 11 #include "I2CSensor.h"
mgottscho 0:8d34cc2ff388 12 #include "PeriodicSensor.h"
mgottscho 0:8d34cc2ff388 13 #include "SleepableSensor.h"
mgottscho 0:8d34cc2ff388 14
mgottscho 0:8d34cc2ff388 15 /**
mgottscho 0:8d34cc2ff388 16 * This class allows for easy control of an MMA8451Q accelerometer IC.
mgottscho 0:8d34cc2ff388 17 */
mgottscho 0:8d34cc2ff388 18 class MMA8451Q : public I2CSensor, public PeriodicSensor, public SleepableSensor {
mgottscho 0:8d34cc2ff388 19 public:
mgottscho 0:8d34cc2ff388 20 /**
mgottscho 0:8d34cc2ff388 21 * Enumeration of allowed output data sampling rates.
mgottscho 0:8d34cc2ff388 22 */
mgottscho 0:8d34cc2ff388 23 typedef enum {
mgottscho 0:8d34cc2ff388 24 HZ800,
mgottscho 0:8d34cc2ff388 25 HZ400,
mgottscho 0:8d34cc2ff388 26 HZ200,
mgottscho 0:8d34cc2ff388 27 HZ100,
mgottscho 0:8d34cc2ff388 28 HZ50,
mgottscho 0:8d34cc2ff388 29 HZ12_5,
mgottscho 0:8d34cc2ff388 30 HZ6_25,
mgottscho 0:8d34cc2ff388 31 HZ1_56
mgottscho 0:8d34cc2ff388 32 } smpl_rate_t;
mgottscho 0:8d34cc2ff388 33
mgottscho 0:8d34cc2ff388 34 /**
mgottscho 0:8d34cc2ff388 35 * Enumeration of allowed dynamic ranges (full scale) of the accelerometer data.
mgottscho 0:8d34cc2ff388 36 * G2: +/- 2G (0.25 mg/level at 14b, 15.6 mg/level at 8b)
mgottscho 0:8d34cc2ff388 37 * G4: +/- 4G (0.5 mg/level at 14b, 31.25 mg/level at 8b)
mgottscho 0:8d34cc2ff388 38 * G8: +/- 8G (1.0 mg/level at 14b, 62.5 mg/level at 8b)
mgottscho 0:8d34cc2ff388 39 */
mgottscho 0:8d34cc2ff388 40 typedef enum {
mgottscho 0:8d34cc2ff388 41 G2,
mgottscho 0:8d34cc2ff388 42 G4,
mgottscho 0:8d34cc2ff388 43 G8
mgottscho 0:8d34cc2ff388 44 } scale_t;
mgottscho 0:8d34cc2ff388 45
mgottscho 0:8d34cc2ff388 46 /**
mgottscho 0:8d34cc2ff388 47 * @param sda the pin identifier for SDA I2C signal
mgottscho 0:8d34cc2ff388 48 * @param scl the pin identifier for SCL I2C signal
mgottscho 0:8d34cc2ff388 49 * @param i2c_addr the 8-bit I2C address for this device. Note that LSB is a don't care.
mgottscho 0:8d34cc2ff388 50 */
mgottscho 0:8d34cc2ff388 51 MMA8451Q(PinName sda, PinName scl, int i2c_addr);
mgottscho 0:8d34cc2ff388 52
mgottscho 0:8d34cc2ff388 53 /**
mgottscho 0:8d34cc2ff388 54 */
mgottscho 0:8d34cc2ff388 55 ~MMA8451Q();
mgottscho 0:8d34cc2ff388 56
mgottscho 0:8d34cc2ff388 57 /**
mgottscho 0:8d34cc2ff388 58 * Self-initialization to some nice preset. You must ensure the device is first deactivated using setActive().
mgottscho 0:8d34cc2ff388 59 */
mgottscho 0:8d34cc2ff388 60 void selfInit();
mgottscho 0:8d34cc2ff388 61
mgottscho 0:8d34cc2ff388 62 /**
mgottscho 0:8d34cc2ff388 63 * Does a soft reset of the device.
mgottscho 0:8d34cc2ff388 64 */
mgottscho 0:8d34cc2ff388 65 void reset();
mgottscho 0:8d34cc2ff388 66
mgottscho 0:8d34cc2ff388 67 //I2C specific methods
mgottscho 0:8d34cc2ff388 68
mgottscho 0:8d34cc2ff388 69 /**
mgottscho 0:8d34cc2ff388 70 * Implements the pure virtual method of the parent I2CSensor class.
mgottscho 0:8d34cc2ff388 71 * @returns the 8-bit device identifier.
mgottscho 0:8d34cc2ff388 72 */
mgottscho 0:8d34cc2ff388 73 uint8_t whoAmI();
mgottscho 0:8d34cc2ff388 74
mgottscho 0:8d34cc2ff388 75 //Device-specific methods
mgottscho 0:8d34cc2ff388 76
mgottscho 0:8d34cc2ff388 77 /**
mgottscho 0:8d34cc2ff388 78 * @returns true if the device is active
mgottscho 0:8d34cc2ff388 79 */
mgottscho 0:8d34cc2ff388 80 bool isActive();
mgottscho 0:8d34cc2ff388 81
mgottscho 0:8d34cc2ff388 82 /**
mgottscho 0:8d34cc2ff388 83 * @param activate if true, enables the device, else disables it
mgottscho 0:8d34cc2ff388 84 */
mgottscho 0:8d34cc2ff388 85 void setActive(bool activate);
mgottscho 0:8d34cc2ff388 86
mgottscho 0:8d34cc2ff388 87 /**
mgottscho 0:8d34cc2ff388 88 * @returns the 8-bit system mode status
mgottscho 0:8d34cc2ff388 89 */
mgottscho 0:8d34cc2ff388 90 uint8_t getSystemMode();
mgottscho 0:8d34cc2ff388 91
mgottscho 0:8d34cc2ff388 92 /**
mgottscho 0:8d34cc2ff388 93 * @returns true if the device is generating 14b resolution data, otherwise 8b
mgottscho 0:8d34cc2ff388 94 */
mgottscho 0:8d34cc2ff388 95 bool is14bDataEnabled();
mgottscho 0:8d34cc2ff388 96
mgottscho 0:8d34cc2ff388 97 /**
mgottscho 0:8d34cc2ff388 98 * @param enable if true, sets 14b data, otherwise 8b data
mgottscho 0:8d34cc2ff388 99 */
mgottscho 0:8d34cc2ff388 100 void set14bData(bool enable);
mgottscho 0:8d34cc2ff388 101
mgottscho 0:8d34cc2ff388 102 /**
mgottscho 0:8d34cc2ff388 103 * @returns an enumerated value corresponding to the current output data sample rate
mgottscho 0:8d34cc2ff388 104 */
mgottscho 0:8d34cc2ff388 105 smpl_rate_t getOutputDataRate();
mgottscho 0:8d34cc2ff388 106
mgottscho 0:8d34cc2ff388 107 /**
mgottscho 0:8d34cc2ff388 108 * @param the enumerated value corresponding to the output data sample rate to use
mgottscho 0:8d34cc2ff388 109 */
mgottscho 0:8d34cc2ff388 110 void setOutputDataRate(smpl_rate_t rate);
mgottscho 0:8d34cc2ff388 111
mgottscho 0:8d34cc2ff388 112 /**
mgottscho 0:8d34cc2ff388 113 * @returns an enumerated value corresponding to the full scale (range) of the output data
mgottscho 0:8d34cc2ff388 114 */
mgottscho 0:8d34cc2ff388 115 scale_t getScale();
mgottscho 0:8d34cc2ff388 116
mgottscho 0:8d34cc2ff388 117 /**
mgottscho 0:8d34cc2ff388 118 * @param scale sets the sample scale via the enumerated value
mgottscho 0:8d34cc2ff388 119 */
mgottscho 0:8d34cc2ff388 120 void setScale(scale_t scale);
mgottscho 0:8d34cc2ff388 121
mgottscho 0:8d34cc2ff388 122 /**
mgottscho 0:8d34cc2ff388 123 * Enables an interrupt output signal from the device whenever data (XYZ) is generated.
mgottscho 0:8d34cc2ff388 124 * @param enable Enables/disables interrupt
mgottscho 0:8d34cc2ff388 125 * @param pinSelect if false, INT2. if true, INT1
mgottscho 0:8d34cc2ff388 126 */
mgottscho 0:8d34cc2ff388 127 void enableDataReadyInterrupt(bool enable, bool pinSelect);
mgottscho 0:8d34cc2ff388 128
mgottscho 0:8d34cc2ff388 129
mgottscho 0:8d34cc2ff388 130 //Device-specific data retrieval methods
mgottscho 0:8d34cc2ff388 131 /**
mgottscho 0:8d34cc2ff388 132 * @param sampleNow if true, queries the device for the sample and returns it. if false, gets the last queried value.
mgottscho 0:8d34cc2ff388 133 * The latter is preferred if this object is set up to sample using interrupts.
mgottscho 0:8d34cc2ff388 134 * @returns a 14-bit value representing the latest data sample for the X dimension, centered at 0.
mgottscho 0:8d34cc2ff388 135 */
mgottscho 0:8d34cc2ff388 136 int16_t getX(bool sampleNow);
mgottscho 0:8d34cc2ff388 137
mgottscho 0:8d34cc2ff388 138 /**
mgottscho 0:8d34cc2ff388 139 * @param sampleNow if true, queries the device for the sample and returns it. if false, gets the last queried value.
mgottscho 0:8d34cc2ff388 140 * The latter is preferred if this object is set up to sample using interrupts.
mgottscho 0:8d34cc2ff388 141 * @returns a 14-bit value representing the latest data sample for the Y dimension, centered at 0.
mgottscho 0:8d34cc2ff388 142 */
mgottscho 0:8d34cc2ff388 143 int16_t getY(bool sampleNow);
mgottscho 0:8d34cc2ff388 144
mgottscho 0:8d34cc2ff388 145 /**
mgottscho 0:8d34cc2ff388 146 * @param sampleNow if true, queries the device for the sample and returns it. if false, gets the last queried value.
mgottscho 0:8d34cc2ff388 147 * The latter is preferred if this object is set up to sample using interrupts.
mgottscho 0:8d34cc2ff388 148 * @returns a 14-bit value representing the latest data sample for the Z dimension, centered at 0.
mgottscho 0:8d34cc2ff388 149 */
mgottscho 0:8d34cc2ff388 150 int16_t getZ(bool sampleNow);
mgottscho 0:8d34cc2ff388 151
mgottscho 0:8d34cc2ff388 152 /**
mgottscho 0:8d34cc2ff388 153 * @param sampleNow if true, queries the device for the sample and returns it. if false, gets the last queried value.
mgottscho 0:8d34cc2ff388 154 * The latter is preferred if this object is set up to sample using interrupts.
mgottscho 0:8d34cc2ff388 155 * Returns the latest X data reading as a float in Gs
mgottscho 0:8d34cc2ff388 156 */
mgottscho 0:8d34cc2ff388 157 float getFloatX(bool sampleNow);
mgottscho 0:8d34cc2ff388 158
mgottscho 0:8d34cc2ff388 159 /**
mgottscho 0:8d34cc2ff388 160 * @param sampleNow if true, queries the device for the sample and returns it. if false, gets the last queried value.
mgottscho 0:8d34cc2ff388 161 * The latter is preferred if this object is set up to sample using interrupts.
mgottscho 0:8d34cc2ff388 162 * Returns the latest Y data reading as a float in Gs
mgottscho 0:8d34cc2ff388 163 */
mgottscho 0:8d34cc2ff388 164 float getFloatY(bool sampleNow);
mgottscho 0:8d34cc2ff388 165
mgottscho 0:8d34cc2ff388 166 /**
mgottscho 0:8d34cc2ff388 167 * @param sampleNow if true, queries the device for the sample and returns it. if false, gets the last queried value.
mgottscho 0:8d34cc2ff388 168 * The latter is preferred if this object is set up to sample using interrupts.
mgottscho 0:8d34cc2ff388 169 * Returns the latest Z data reading as a float in Gs
mgottscho 0:8d34cc2ff388 170 */
mgottscho 0:8d34cc2ff388 171 float getFloatZ(bool sampleNow);
mgottscho 0:8d34cc2ff388 172
mgottscho 0:8d34cc2ff388 173 virtual void sleep();
mgottscho 0:8d34cc2ff388 174
mgottscho 0:8d34cc2ff388 175 virtual void wake();
mgottscho 0:8d34cc2ff388 176
mgottscho 0:8d34cc2ff388 177 private:
mgottscho 0:8d34cc2ff388 178 /**
mgottscho 0:8d34cc2ff388 179 * Interrupt service routine for fetching accelerometer data from the device.
mgottscho 0:8d34cc2ff388 180 */
mgottscho 0:8d34cc2ff388 181 virtual void __sample_data_ISR();
mgottscho 0:8d34cc2ff388 182
mgottscho 0:8d34cc2ff388 183 ///////////////// CONSTANTS /////////////////////
mgottscho 0:8d34cc2ff388 184
mgottscho 0:8d34cc2ff388 185 //Device register addresses
mgottscho 0:8d34cc2ff388 186 static const uint8_t STATUS = 0x00;
mgottscho 0:8d34cc2ff388 187 static const uint8_t F_STATUS = 0x00;
mgottscho 0:8d34cc2ff388 188 static const uint8_t OUT_X_MSB = 0x01;
mgottscho 0:8d34cc2ff388 189 static const uint8_t OUT_X_LSB = 0x02;
mgottscho 0:8d34cc2ff388 190 static const uint8_t OUT_Y_MSB = 0x03;
mgottscho 0:8d34cc2ff388 191 static const uint8_t OUT_Y_LSB = 0x04;
mgottscho 0:8d34cc2ff388 192 static const uint8_t OUT_Z_MSB = 0x05;
mgottscho 0:8d34cc2ff388 193 static const uint8_t OUT_Z_LSB = 0x06;
mgottscho 0:8d34cc2ff388 194 static const uint8_t F_SETUP = 0x09;
mgottscho 0:8d34cc2ff388 195 static const uint8_t TRIG_CFG = 0x0A;
mgottscho 0:8d34cc2ff388 196 static const uint8_t SYSMOD = 0x0B;
mgottscho 0:8d34cc2ff388 197 static const uint8_t INT_SOURCE = 0x0C;
mgottscho 0:8d34cc2ff388 198 static const uint8_t WHO_AM_I = 0x0D;
mgottscho 0:8d34cc2ff388 199 static const uint8_t XYZ_DATA_CFG = 0x0E;
mgottscho 0:8d34cc2ff388 200 static const uint8_t HP_FILTER_CUTOFF = 0x0F;
mgottscho 0:8d34cc2ff388 201 static const uint8_t PL_STATUS = 0x10;
mgottscho 0:8d34cc2ff388 202 static const uint8_t PL_CFG = 0x11;
mgottscho 0:8d34cc2ff388 203 static const uint8_t PL_COUNT = 0x12;
mgottscho 0:8d34cc2ff388 204 static const uint8_t PL_BF_ZCOMP = 0x13;
mgottscho 0:8d34cc2ff388 205 static const uint8_t P_L_THS_REG = 0x14;
mgottscho 0:8d34cc2ff388 206 static const uint8_t FF_MT_CFG = 0x15;
mgottscho 0:8d34cc2ff388 207 static const uint8_t FF_MT_SRC = 0x16;
mgottscho 0:8d34cc2ff388 208 static const uint8_t FF_MT_THS = 0x17;
mgottscho 0:8d34cc2ff388 209 static const uint8_t FF_MT_COUNT = 0x18;
mgottscho 0:8d34cc2ff388 210 static const uint8_t TRANSIENT_CFG = 0x1D;
mgottscho 0:8d34cc2ff388 211 static const uint8_t TRANSIENT_SRC = 0x1E;
mgottscho 0:8d34cc2ff388 212 static const uint8_t TRANSIENT_THS = 0x1F;
mgottscho 0:8d34cc2ff388 213 static const uint8_t PULSE_CFG = 0x21;
mgottscho 0:8d34cc2ff388 214 static const uint8_t PULSE_SRC = 0x22;
mgottscho 0:8d34cc2ff388 215 static const uint8_t PULSE_THSX = 0x23;
mgottscho 0:8d34cc2ff388 216 static const uint8_t PULSE_THSY = 0x24;
mgottscho 0:8d34cc2ff388 217 static const uint8_t PULSE_THSZ = 0x25;
mgottscho 0:8d34cc2ff388 218 static const uint8_t PULSE_TMLT = 0x26;
mgottscho 0:8d34cc2ff388 219 static const uint8_t PULSE_LTCY = 0x27;
mgottscho 0:8d34cc2ff388 220 static const uint8_t PULSE_WIND = 0x28;
mgottscho 0:8d34cc2ff388 221 static const uint8_t ASLP_COUNT = 0x29;
mgottscho 0:8d34cc2ff388 222 static const uint8_t CTRL_REG1 = 0x2A;
mgottscho 0:8d34cc2ff388 223 static const uint8_t CTRL_REG2 = 0x2B;
mgottscho 0:8d34cc2ff388 224 static const uint8_t CTRL_REG3 = 0x2C;
mgottscho 0:8d34cc2ff388 225 static const uint8_t CTRL_REG4 = 0x2D;
mgottscho 0:8d34cc2ff388 226 static const uint8_t CTRL_REG5 = 0x2E;
mgottscho 0:8d34cc2ff388 227 static const uint8_t OFF_X = 0x2F;
mgottscho 0:8d34cc2ff388 228 static const uint8_t OFF_Y = 0x30;
mgottscho 0:8d34cc2ff388 229 static const uint8_t OFF_Z = 0x31;
mgottscho 0:8d34cc2ff388 230
mgottscho 0:8d34cc2ff388 231 //Register masks
mgottscho 0:8d34cc2ff388 232 static const uint8_t XYZ_DATA_CFG_HPF_OUT_MASK = 0x10; //b0001 0000
mgottscho 0:8d34cc2ff388 233 static const uint8_t XYZ_DATA_CFG_FS_MASK = 0x03; //b0000 0011
mgottscho 0:8d34cc2ff388 234 static const uint8_t CTRL_REG1_ASLP_RATE_MASK = 0xC0; //b1100 0000
mgottscho 0:8d34cc2ff388 235 static const uint8_t CTRL_REG1_DR_MASK = 0x38; //b0011 1000
mgottscho 0:8d34cc2ff388 236 static const uint8_t CTRL_REG1_LNOISE_MASK = 0x04; //b0000 0100
mgottscho 0:8d34cc2ff388 237 static const uint8_t CTRL_REG1_F_READ_MASK = 0x02; //b0000 0010
mgottscho 0:8d34cc2ff388 238 static const uint8_t CTRL_REG1_ACTIVE_MASK = 0x01; //b0000 0001
mgottscho 0:8d34cc2ff388 239 static const uint8_t CTRL_REG2_ST_MASK = 0x80; //b1000 0000
mgottscho 0:8d34cc2ff388 240 static const uint8_t CTRL_REG2_RST_MASK = 0x40; //b0100 0000
mgottscho 0:8d34cc2ff388 241 static const uint8_t CTRL_REG2_SMODS_MASK = 0x18; //b0001 1000
mgottscho 0:8d34cc2ff388 242 static const uint8_t CTRL_REG2_SLPE_MASK = 0x04; //b0000 0100
mgottscho 0:8d34cc2ff388 243 static const uint8_t CTRL_REG2_MODS_MASK = 0x03; //b0000 0011
mgottscho 0:8d34cc2ff388 244 static const uint8_t CTRL_REG3_FIFO_GATE_MASK = 0x80; //b1000 0000
mgottscho 0:8d34cc2ff388 245 static const uint8_t CTRL_REG3_WAKE_TRANS_MASK = 0x40; //b0100 0000
mgottscho 0:8d34cc2ff388 246 static const uint8_t CTRL_REG3_WAKE_LNDPRT_MASK = 0x20; //b0010 0000
mgottscho 0:8d34cc2ff388 247 static const uint8_t CTRL_REG3_WAKE_PULSE_MASK = 0x10; //b0001 0000
mgottscho 0:8d34cc2ff388 248 static const uint8_t CTRL_REG3_WAKE_FF_MT_MASK = 0x08; //b0000 1000
mgottscho 0:8d34cc2ff388 249 static const uint8_t CTRL_REG3_IPOL_MASK = 0x02; //b0000 0010
mgottscho 0:8d34cc2ff388 250 static const uint8_t CTRL_REG3_PP_OD_MASK = 0x01; //b0000 0001
mgottscho 0:8d34cc2ff388 251 static const uint8_t CTRL_REG4_INT_EN_ASLP_MASK = 0x80; //b1000 0000
mgottscho 0:8d34cc2ff388 252 static const uint8_t CTRL_REG4_INT_EN_FIFO_MASK = 0x40; //b0100 0000
mgottscho 0:8d34cc2ff388 253 static const uint8_t CTRL_REG4_INT_EN_TRANS_MASK = 0x20; //b0010 0000
mgottscho 0:8d34cc2ff388 254 static const uint8_t CTRL_REG4_INT_EN_LNDPR_MASK = 0x10; //b0001 0000
mgottscho 0:8d34cc2ff388 255 static const uint8_t CTRL_REG4_INT_EN_PULSE_MASK = 0x08; //b0000 1000
mgottscho 0:8d34cc2ff388 256 static const uint8_t CTRL_REG4_INT_EN_FF_MT_MASK = 0x04; //b0000 0100
mgottscho 0:8d34cc2ff388 257 static const uint8_t CTRL_REG4_INT_EN_DRDY_MASK = 0x01; //b0000 0001
mgottscho 0:8d34cc2ff388 258 static const uint8_t CTRL_REG5_INT_CFG_ASLP_MASK = 0x80; //b1000 0000
mgottscho 0:8d34cc2ff388 259 static const uint8_t CTRL_REG5_INT_CFG_FIFO_MASK = 0x40; //b0100 0000
mgottscho 0:8d34cc2ff388 260 static const uint8_t CTRL_REG5_INT_CFG_TRANS_MASK = 0x20; //b0010 0000
mgottscho 0:8d34cc2ff388 261 static const uint8_t CTRL_REG5_INT_CFG_LNDPRT_MASK = 0x10; //b0001 0000
mgottscho 0:8d34cc2ff388 262 static const uint8_t CTRL_REG5_INT_CFG_PULSE_MASK = 0x08; //b0000 1000
mgottscho 0:8d34cc2ff388 263 static const uint8_t CTRL_REG5_INT_CFG_FF_MT_MASK = 0x04; //b0000 0100
mgottscho 0:8d34cc2ff388 264 static const uint8_t CTRL_REG5_INT_CFG_DRDY_MASK = 0x01; //b0000 0001
mgottscho 0:8d34cc2ff388 265
mgottscho 0:8d34cc2ff388 266 //Mapping of sensor values
mgottscho 0:8d34cc2ff388 267 static const float G2_DIV = 0.00024414; // in Gs/level, 1/4096
mgottscho 0:8d34cc2ff388 268 static const float G4_DIV = 0.00048828; // in Gs/level, 1/2048
mgottscho 0:8d34cc2ff388 269 static const float G8_DIV = 0.00097656; // in Gs/level, 1/1024
mgottscho 0:8d34cc2ff388 270
mgottscho 0:8d34cc2ff388 271
mgottscho 0:8d34cc2ff388 272 ////////////// VARIABLES /////////////////
mgottscho 0:8d34cc2ff388 273
mgottscho 0:8d34cc2ff388 274 //MMA8451Q state ("cached" from the values actually on the device)
mgottscho 0:8d34cc2ff388 275 volatile int16_t __x;
mgottscho 0:8d34cc2ff388 276 volatile int16_t __y;
mgottscho 0:8d34cc2ff388 277 volatile int16_t __z;
mgottscho 0:8d34cc2ff388 278
mgottscho 0:8d34cc2ff388 279 bool __active;
mgottscho 0:8d34cc2ff388 280 bool __14b_data_enabled;
mgottscho 0:8d34cc2ff388 281 smpl_rate_t __output_data_rate;
mgottscho 0:8d34cc2ff388 282 scale_t __scale;
mgottscho 0:8d34cc2ff388 283 float __div; //current sensor mapping
mgottscho 0:8d34cc2ff388 284 };
mgottscho 0:8d34cc2ff388 285
mgottscho 0:8d34cc2ff388 286 #endif