Neil Hardy / Mbed 2 deprecated ImpedanceMeasurement

using AD5933 to measure impedances

Dependencies:   4DGL-uLCD-SE mbed

AD5933.h@71:91f99e81cd1c, 2016-12-13 (annotated)

Committer:
mvaca3
Date:
Tue Dec 13 15:50:29 2016 +0000
Revision:
71:91f99e81cd1c
Parent:
65:c3324ec84a48 
fixed fmod issue

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nhardy6 17:ee9374e89c54 1 #include <mbed.h>
nhardy6 17:ee9374e89c54 2 #include "uLCD_4DGL.h"
nhardy6 17:ee9374e89c54 3
nhardy6 17:ee9374e89c54 4 #ifndef AD5933_H
nhardy6 17:ee9374e89c54 5 #define AD5933_H
nhardy6 17:ee9374e89c54 6
nhardy6 17:ee9374e89c54 7 class AD5933
nhardy6 17:ee9374e89c54 8 {
nhardy6 17:ee9374e89c54 9 public:
nhardy6 17:ee9374e89c54 10 //constructor
Luke95 49:f9b34fc28449 11 AD5933(I2C* i2c, Serial *pc, Serial *bt);
nhardy6 17:ee9374e89c54 12
nhardy6 17:ee9374e89c54 13 //functions
Luke95 63:a85af2f0f13b 14 void calibrate(double); //setup device
nhardy6 48:3e9159532341 15 void findZ(int); //finds impedance
nhardy6 48:3e9159532341 16 float getZ(); //returns impedance
nhardy6 48:3e9159532341 17 float getPhase(); //returns phase
nhardy6 17:ee9374e89c54 18 private:
nhardy6 17:ee9374e89c54 19 //devices
nhardy6 17:ee9374e89c54 20 I2C* _i2c;
nhardy6 17:ee9374e89c54 21 Serial* _pc;
nhardy6 17:ee9374e89c54 22 Serial* _bt;
nhardy6 17:ee9374e89c54 23 //variables
nhardy6 17:ee9374e89c54 24 //data
Luke95 64:0dd5e0e2f8bf 25 int _real[10]; //real/imaginary values for a sweep
Luke95 64:0dd5e0e2f8bf 26 int _imag[10];
Luke95 49:f9b34fc28449 27 int _r; //real/imaginary values for a single frequency reading
Luke95 40:8cad112eb8aa 28 int _i;
nhardy6 23:458b9d572628 29 int _temp[2]; //temperature (calibrated and current value)
Luke95 65:c3324ec84a48 30 long double _z; //impedance array
Luke95 65:c3324ec84a48 31 long double _phs; //real phase array
nhardy6 23:458b9d572628 32 //for calibration
Luke95 65:c3324ec84a48 33 long double _gain[10]; //gain
Luke95 64:0dd5e0e2f8bf 34 float _phase[10]; //phase
nhardy6 25:b74e22cfe52a 35 float _ref; //reference resistance
nhardy6 17:ee9374e89c54 36 //settings
nhardy6 23:458b9d572628 37 int _range; //output voltage range
nhardy6 17:ee9374e89c54 38 int _freq; //start frequency
nhardy6 17:ee9374e89c54 39 int _inc; //increment
nhardy6 23:458b9d572628 40 int _n; //number of increments
Luke95 49:f9b34fc28449 41 char _pga;
nhardy6 17:ee9374e89c54 42 //functions
nhardy6 48:3e9159532341 43 void sweep(); //gets the data
Luke95 49:f9b34fc28449 44 void sweep1();
nhardy6 48:3e9159532341 45 void configure(); //ready the device for sweep
nhardy6 48:3e9159532341 46 void read(int); //get value
nhardy6 48:3e9159532341 47 void calculate(); //cleans value
nhardy6 48:3e9159532341 48 float getTemp(); //returns temperature
nhardy6 17:ee9374e89c54 49 };
nhardy6 17:ee9374e89c54 50
nhardy6 17:ee9374e89c54 51 //Register defines
nhardy6 17:ee9374e89c54 52
nhardy6 17:ee9374e89c54 53 //control
nhardy6 17:ee9374e89c54 54 #define CTRL_HIGH 0x80
nhardy6 17:ee9374e89c54 55 #define CTRL_LOW 0x81
nhardy6 17:ee9374e89c54 56 //start frequency
nhardy6 17:ee9374e89c54 57 #define FREQ_HIGH 0x82
nhardy6 17:ee9374e89c54 58 #define FREQ_MID 0x83
nhardy6 17:ee9374e89c54 59 #define FREQ_LOW 0x84
nhardy6 17:ee9374e89c54 60 //frequency increment
nhardy6 17:ee9374e89c54 61 #define FINC_HIGH 0x85
nhardy6 17:ee9374e89c54 62 #define FINC_MID 0x86
nhardy6 17:ee9374e89c54 63 #define FINC_LOW 0x87
nhardy6 17:ee9374e89c54 64 //number of increments
nhardy6 17:ee9374e89c54 65 #define NINC_HIGH 0x88
nhardy6 17:ee9374e89c54 66 #define NINC_LOW 0x89
nhardy6 17:ee9374e89c54 67 //number of settling time cycles
nhardy6 17:ee9374e89c54 68 #define SET_CYCLE 0x8A
nhardy6 17:ee9374e89c54 69 #define CYCLES 0x8B
nhardy6 17:ee9374e89c54 70 //status
nhardy6 17:ee9374e89c54 71 #define STATUS 0x8F
nhardy6 17:ee9374e89c54 72 //temperature data
nhardy6 17:ee9374e89c54 73 #define TEMP_HIGH 0x92
nhardy6 17:ee9374e89c54 74 #define TEMP_LOW 0x93
nhardy6 17:ee9374e89c54 75 //real data
nhardy6 17:ee9374e89c54 76 #define REAL_HIGH 0x94
nhardy6 17:ee9374e89c54 77 #define REAL_LOW 0x95
nhardy6 17:ee9374e89c54 78 //imaginary data
nhardy6 17:ee9374e89c54 79 #define IMAG_HIGH 0x96
nhardy6 17:ee9374e89c54 80 #define IMAG_LOW 0x97
nhardy6 17:ee9374e89c54 81
nhardy6 23:458b9d572628 82 //Constants
nhardy6 23:458b9d572628 83
nhardy6 17:ee9374e89c54 84 // Temperature measuring
nhardy6 17:ee9374e89c54 85 #define TEMP_MEASURE (CTRL_TEMP_MEASURE)
nhardy6 17:ee9374e89c54 86 #define TEMP_NO_MEASURE (CTRL_NO_OPERATION)
nhardy6 17:ee9374e89c54 87 // Clock sources
nhardy6 17:ee9374e89c54 88 #define CLOCK_INTERNAL (CTRL_CLOCK_INTERNAL)
nhardy6 17:ee9374e89c54 89 #define CLOCK_EXTERNAL (CTRL_CLOCK_EXTERNAL)
nhardy6 17:ee9374e89c54 90 // PGA gain options
nhardy6 17:ee9374e89c54 91 #define PGA_GAIN_X1 (CTRL_PGA_GAIN_X1)
nhardy6 17:ee9374e89c54 92 #define PGA_GAIN_X5 (CTRL_PGA_GAIN_X5)
nhardy6 17:ee9374e89c54 93 // Power modes
nhardy6 17:ee9374e89c54 94 #define POWER_STANDBY (CTRL_STANDBY_MODE)
nhardy6 17:ee9374e89c54 95 #define POWER_DOWN (CTRL_POWER_DOWN_MODE)
nhardy6 17:ee9374e89c54 96 #define POWER_ON (CTRL_NO_OPERATION)
nhardy6 17:ee9374e89c54 97 // I2C result success/fail
nhardy6 17:ee9374e89c54 98 #define I2C_RESULT_SUCCESS (0)
nhardy6 17:ee9374e89c54 99 #define I2C_RESULT_DATA_TOO_LONG (1)
nhardy6 17:ee9374e89c54 100 #define I2C_RESULT_ADDR_NAK (2)
nhardy6 17:ee9374e89c54 101 #define I2C_RESULT_DATA_NAK (3)
nhardy6 17:ee9374e89c54 102 #define I2C_RESULT_OTHER_FAIL (4)
nhardy6 17:ee9374e89c54 103 // Control register options
nhardy6 17:ee9374e89c54 104 #define CTRL_NO_OPERATION (0b00000000)
nhardy6 17:ee9374e89c54 105 #define CTRL_INIT_START_FREQ (0b00010000)
nhardy6 17:ee9374e89c54 106 #define CTRL_START_FREQ_SWEEP (0b00100000)
nhardy6 17:ee9374e89c54 107 #define CTRL_INCREMENT_FREQ (0b00110000)
nhardy6 17:ee9374e89c54 108 #define CTRL_REPEAT_FREQ (0b01000000)
nhardy6 17:ee9374e89c54 109 #define CTRL_TEMP_MEASURE (0b10010000)
nhardy6 17:ee9374e89c54 110 #define CTRL_POWER_DOWN_MODE (0b10100000)
nhardy6 17:ee9374e89c54 111 #define CTRL_STANDBY_MODE (0b10110000)
nhardy6 17:ee9374e89c54 112 #define CTRL_RESET (0b00010000)
nhardy6 17:ee9374e89c54 113 #define CTRL_CLOCK_EXTERNAL (0b00001000)
nhardy6 17:ee9374e89c54 114 #define CTRL_CLOCK_INTERNAL (0b00000000)
nhardy6 17:ee9374e89c54 115 #define CTRL_PGA_GAIN_X1 (0b00000001)
nhardy6 17:ee9374e89c54 116 #define CTRL_PGA_GAIN_X5 (0b00000000)
nhardy6 17:ee9374e89c54 117 // Status register options
nhardy6 17:ee9374e89c54 118 #define STATUS_TEMP_VALID (0x01)
nhardy6 17:ee9374e89c54 119 #define STATUS_DATA_VALID (0x02)
nhardy6 17:ee9374e89c54 120 #define STATUS_SWEEP_DONE (0x04)
nhardy6 17:ee9374e89c54 121 #define STATUS_ERROR (0xFF)
nhardy6 17:ee9374e89c54 122 // Frequency sweep parameters
nhardy6 17:ee9374e89c54 123 #define SWEEP_DELAY (1)
nhardy6 17:ee9374e89c54 124
nhardy6 17:ee9374e89c54 125 #endif