Chandra Tjhai / Mbed 2 deprecated ENGO333_Lab_tiltmeter

Simple tiltmeter using accelerometer

Dependencies:   mbed C12832

ENGO333_MMA7660.h@0:7d6134e052e0, 2019-11-23 (annotated)

Committer:
chtjhai
Date:
Sat Nov 23 04:58:09 2019 +0000
Revision:
0:7d6134e052e0
Simple tiltmeter using accelerometer

Who changed what in which revision?

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chtjhai 0:7d6134e052e0 1 /**
chtjhai 0:7d6134e052e0 2 * File : ENGO333_MMA7660.h
chtjhai 0:7d6134e052e0 3 * Created by : Chandra Tjhai
chtjhai 0:7d6134e052e0 4 * Created on : September 10, 2016
chtjhai 0:7d6134e052e0 5 *
chtjhai 0:7d6134e052e0 6 * Description :
chtjhai 0:7d6134e052e0 7 * This library is created for ENGO 333 class. The accelerometer is mounted
chtjhai 0:7d6134e052e0 8 * on the mbed Application Board. The I2C connection is permanently set to p28
chtjhai 0:7d6134e052e0 9 * (SDA) and p27 (SCL).
chtjhai 0:7d6134e052e0 10 */
chtjhai 0:7d6134e052e0 11
chtjhai 0:7d6134e052e0 12 #ifndef ENGO333_MMA7660_H
chtjhai 0:7d6134e052e0 13 #define ENGO333_MMA7660_H
chtjhai 0:7d6134e052e0 14
chtjhai 0:7d6134e052e0 15 #include "ENGO333_I2C.h"
chtjhai 0:7d6134e052e0 16 #include "Tiltmeter.h"
chtjhai 0:7d6134e052e0 17
chtjhai 0:7d6134e052e0 18 // Sensor I2C address
chtjhai 0:7d6134e052e0 19 #define MMA7660_ADDRESS 0x98
chtjhai 0:7d6134e052e0 20
chtjhai 0:7d6134e052e0 21 // Define sensor registers
chtjhai 0:7d6134e052e0 22 #define MMA7660_XOUT_REG 0x00
chtjhai 0:7d6134e052e0 23 #define MMA7660_YOUT_REG 0x01
chtjhai 0:7d6134e052e0 24 #define MMA7660_ZOUT_REG 0x02
chtjhai 0:7d6134e052e0 25 #define MMA7660_TILT_REG 0x03
chtjhai 0:7d6134e052e0 26 #define MMA7660_SRST_REG 0x04
chtjhai 0:7d6134e052e0 27 #define MMA7660_SPCNT_REG 0x05
chtjhai 0:7d6134e052e0 28 #define MMA7660_INTSU_REG 0x06
chtjhai 0:7d6134e052e0 29 #define MMA7660_MODE_REG 0x07
chtjhai 0:7d6134e052e0 30 #define MMA7660_SR_REG 0x08
chtjhai 0:7d6134e052e0 31 #define MMA7660_PDET_REF 0x09
chtjhai 0:7d6134e052e0 32 #define MMA7660_PD_REG 0x0A
chtjhai 0:7d6134e052e0 33
chtjhai 0:7d6134e052e0 34 // Define acceleration scale
chtjhai 0:7d6134e052e0 35 #define MMA7660_SCALE (21.33)
chtjhai 0:7d6134e052e0 36
chtjhai 0:7d6134e052e0 37 // Define AMSR values
chtjhai 0:7d6134e052e0 38 typedef enum
chtjhai 0:7d6134e052e0 39 {
chtjhai 0:7d6134e052e0 40 MMA7660_AMSR120 = 0,
chtjhai 0:7d6134e052e0 41 MMA7660_AMSR64 = 1,
chtjhai 0:7d6134e052e0 42 MMA7660_AMSR32 = 2,
chtjhai 0:7d6134e052e0 43 MMA7660_AMSR16 = 3,
chtjhai 0:7d6134e052e0 44 MMA7660_AMSR8 = 4,
chtjhai 0:7d6134e052e0 45 MMA7660_AMSR4 = 5,
chtjhai 0:7d6134e052e0 46 MMA7660_AMSR2 = 6,
chtjhai 0:7d6134e052e0 47 MMA7660_AMSR1 = 7
chtjhai 0:7d6134e052e0 48 }MMA7660_AMSR_t;
chtjhai 0:7d6134e052e0 49
chtjhai 0:7d6134e052e0 50 /**
chtjhai 0:7d6134e052e0 51 * Class
chtjhai 0:7d6134e052e0 52 * A class to handle MMA7660 3-DOF accelerometer
chtjhai 0:7d6134e052e0 53 */
chtjhai 0:7d6134e052e0 54 class ENGO333_MMA7660
chtjhai 0:7d6134e052e0 55 {
chtjhai 0:7d6134e052e0 56 private:
chtjhai 0:7d6134e052e0 57 ENGO333_I2C i2c; // I2C communication connection
chtjhai 0:7d6134e052e0 58 float measAccel[3]; // Measured acceleration values in units of m/s/s
chtjhai 0:7d6134e052e0 59
chtjhai 0:7d6134e052e0 60 public:
chtjhai 0:7d6134e052e0 61 /**
chtjhai 0:7d6134e052e0 62 * Default Constructor
chtjhai 0:7d6134e052e0 63 * Once called, trigger active mode and set MMA7660_AMSR8
chtjhai 0:7d6134e052e0 64 */
chtjhai 0:7d6134e052e0 65 ENGO333_MMA7660();
chtjhai 0:7d6134e052e0 66
chtjhai 0:7d6134e052e0 67 /**
chtjhai 0:7d6134e052e0 68 * Function :
chtjhai 0:7d6134e052e0 69 * Test device's accelerometer connection. MMA7660 does not have identifier
chtjhai 0:7d6134e052e0 70 * registers. Thus, this function will simply take measurements and check
chtjhai 0:7d6134e052e0 71 * their validity.
chtjhai 0:7d6134e052e0 72 *
chtjhai 0:7d6134e052e0 73 * Argument :
chtjhai 0:7d6134e052e0 74 * NONE
chtjhai 0:7d6134e052e0 75 *
chtjhai 0:7d6134e052e0 76 * Return :
chtjhai 0:7d6134e052e0 77 * Return TRUE if connection is good, otherwise FALSSE
chtjhai 0:7d6134e052e0 78 */
chtjhai 0:7d6134e052e0 79 virtual bool TestConnection();
chtjhai 0:7d6134e052e0 80
chtjhai 0:7d6134e052e0 81
chtjhai 0:7d6134e052e0 82 private:
chtjhai 0:7d6134e052e0 83
chtjhai 0:7d6134e052e0 84 // Read the accelerometer data and store the values for later use. You can access the values by
chtjhai 0:7d6134e052e0 85 // calling the GetAccelX(), GetAccelY() and/or GetAccelZ();
chtjhai 0:7d6134e052e0 86 //
chtjhai 0:7d6134e052e0 87 // Arguments:
chtjhai 0:7d6134e052e0 88 // None
chtjhai 0:7d6134e052e0 89 //
chtjhai 0:7d6134e052e0 90 // Returns:
chtjhai 0:7d6134e052e0 91 // Nothing
chtjhai 0:7d6134e052e0 92 //
chtjhai 0:7d6134e052e0 93 // Remarks:
chtjhai 0:7d6134e052e0 94 // The data will be stored in the 'MeasuredAccel' member variable in units of m/s/s
chtjhai 0:7d6134e052e0 95 virtual void ReadAccelerometers();
chtjhai 0:7d6134e052e0 96
chtjhai 0:7d6134e052e0 97
chtjhai 0:7d6134e052e0 98 // Get the most recently measured X-axis acceleration as stored during the last call to
chtjhai 0:7d6134e052e0 99 // ReadAccelerometer()
chtjhai 0:7d6134e052e0 100 //
chtjhai 0:7d6134e052e0 101 // Arguments:
chtjhai 0:7d6134e052e0 102 // None
chtjhai 0:7d6134e052e0 103 //
chtjhai 0:7d6134e052e0 104 // Returns:
chtjhai 0:7d6134e052e0 105 // The function returns the most recently measured X-axis acceleration in units of m/s/s
chtjhai 0:7d6134e052e0 106 virtual float GetAccelX() const;
chtjhai 0:7d6134e052e0 107
chtjhai 0:7d6134e052e0 108
chtjhai 0:7d6134e052e0 109 // Get the most recently measured Y-axis acceleration as stored during the last call to
chtjhai 0:7d6134e052e0 110 // ReadAccelerometer()
chtjhai 0:7d6134e052e0 111 //
chtjhai 0:7d6134e052e0 112 // Arguments:
chtjhai 0:7d6134e052e0 113 // None
chtjhai 0:7d6134e052e0 114 //
chtjhai 0:7d6134e052e0 115 // Returns:
chtjhai 0:7d6134e052e0 116 // The function returns the most recently measured Y-axis acceleration in units of m/s/s
chtjhai 0:7d6134e052e0 117 virtual float GetAccelY() const;
chtjhai 0:7d6134e052e0 118
chtjhai 0:7d6134e052e0 119
chtjhai 0:7d6134e052e0 120 // Get the most recently measured Z-axis acceleration as stored during the last call to
chtjhai 0:7d6134e052e0 121 // ReadAccelerometer()
chtjhai 0:7d6134e052e0 122 //
chtjhai 0:7d6134e052e0 123 // Arguments:
chtjhai 0:7d6134e052e0 124 // None
chtjhai 0:7d6134e052e0 125 //
chtjhai 0:7d6134e052e0 126 // Returns:
chtjhai 0:7d6134e052e0 127 // The function returns the most recently measured Z-axis acceleration in units of m/s/s
chtjhai 0:7d6134e052e0 128 virtual float GetAccelZ() const;
chtjhai 0:7d6134e052e0 129
chtjhai 0:7d6134e052e0 130
chtjhai 0:7d6134e052e0 131 // Set the device to 'active' mode
chtjhai 0:7d6134e052e0 132 //
chtjhai 0:7d6134e052e0 133 // Arguments:
chtjhai 0:7d6134e052e0 134 // None
chtjhai 0:7d6134e052e0 135 //
chtjhai 0:7d6134e052e0 136 // Returns:
chtjhai 0:7d6134e052e0 137 // Nothing
chtjhai 0:7d6134e052e0 138 void SetActiveMode();
chtjhai 0:7d6134e052e0 139
chtjhai 0:7d6134e052e0 140
chtjhai 0:7d6134e052e0 141 // Set the device sampling rate through AM bits, see MMA7660_SR_REG
chtjhai 0:7d6134e052e0 142 //
chtjhai 0:7d6134e052e0 143 // Arguments:
chtjhai 0:7d6134e052e0 144 // samplingRate = setting of AM bits in MMA7660_SR_REG
chtjhai 0:7d6134e052e0 145 //
chtjhai 0:7d6134e052e0 146 // Returns:
chtjhai 0:7d6134e052e0 147 // Nothing
chtjhai 0:7d6134e052e0 148 void SetSamplingRateAM(MMA7660_AMSR_t samplingRate);
chtjhai 0:7d6134e052e0 149
chtjhai 0:7d6134e052e0 150 };
chtjhai 0:7d6134e052e0 151
chtjhai 0:7d6134e052e0 152 #endif
chtjhai 0:7d6134e052e0 153
chtjhai 0:7d6134e052e0 154