Sets ticks directly for heater test
Heater.h@23:65a9f9d85a3a, 2019-08-12 (annotated)
- Committer:
- seoirsem
- Date:
- Mon Aug 12 10:41:37 2019 +0000
- Revision:
- 23:65a9f9d85a3a
- Parent:
- 22:2d34a03ae57e
V2 heater set PWM ticks directly;
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
omatthews | 0:4e33cc8171f4 | 1 | /*------------------------------------------------------------------------------ |
omatthews | 0:4e33cc8171f4 | 2 | Library header file for heater operations |
omatthews | 0:4e33cc8171f4 | 3 | Date: 16/07/2018 |
omatthews | 0:4e33cc8171f4 | 4 | |
omatthews | 0:4e33cc8171f4 | 5 | |
omatthews | 0:4e33cc8171f4 | 6 | ------------------------------------------------------------------------------*/ |
omatthews | 0:4e33cc8171f4 | 7 | |
omatthews | 0:4e33cc8171f4 | 8 | #ifndef Heater_H |
omatthews | 0:4e33cc8171f4 | 9 | #define Heater_H |
omatthews | 0:4e33cc8171f4 | 10 | #include "mbed.h" |
omatthews | 0:4e33cc8171f4 | 11 | #include "ADS8568_ADC.h" |
omatthews | 17:0bfed0e96927 | 12 | #include "FastPWM.h" |
omatthews | 0:4e33cc8171f4 | 13 | |
omatthews | 22:2d34a03ae57e | 14 | #define MEAS_DELAY 60 // measurement delay for ADC in us |
omatthews | 19:fccdd7127f94 | 15 | #define WAIT_DELAY 3 // wait delay for ADC in ms |
omatthews | 12:8a048f111140 | 16 | |
omatthews | 16:cd837b230b09 | 17 | #define N_ROLL_AVG 1 // rolling average for R values |
omatthews | 1:4435d407d827 | 18 | #define ALL_CH 15 //value of convst bus to read all chanels simultaneosly |
seoirsem | 23:65a9f9d85a3a | 19 | #define Kp 0.1f //proportional gain |
seoirsem | 23:65a9f9d85a3a | 20 | #define Ti 0.2f //Integration time |
omatthews | 22:2d34a03ae57e | 21 | #define Kd 0.1f //Differentiator gain |
omatthews | 22:2d34a03ae57e | 22 | #define WIND_UP_LIMIT 0.1f //The change in error which turns off the integral term |
seoirsem | 23:65a9f9d85a3a | 23 | #define TICK_CYCLE 1000 //the number of tics per duty cycle |
omatthews | 22:2d34a03ae57e | 24 | #define LOG_LIM 30 //Number of reads before the result is logged |
seoirsem | 23:65a9f9d85a3a | 25 | |
seoirsem | 23:65a9f9d85a3a | 26 | #define GUARD_PWM_RATIO 21.0/82.0 //Ratio of guard duty cycle to heater duty cycle |
omatthews | 18:f5d26d3d532f | 27 | |
omatthews | 0:4e33cc8171f4 | 28 | |
omatthews | 0:4e33cc8171f4 | 29 | class Heater |
omatthews | 0:4e33cc8171f4 | 30 | { |
omatthews | 7:59ece353eea2 | 31 | //This class provides the interface through which each heater can be controlled |
omatthews | 0:4e33cc8171f4 | 32 | public: |
omatthews | 0:4e33cc8171f4 | 33 | /** Constructor |
omatthews | 18:f5d26d3d532f | 34 | * @param i_port, the current port in the ADC |
omatthews | 18:f5d26d3d532f | 35 | * @param v_port, the voltage port in the ADC |
omatthews | 19:fccdd7127f94 | 36 | * @param * drive, a pointer to the heater drive |
seoirsem | 23:65a9f9d85a3a | 37 | * @param * guard, a pointer to the guard |
seoirsem | 23:65a9f9d85a3a | 38 | * @param * intercept, the gradient of the linear relationship between resistance and temperature |
seoirsem | 23:65a9f9d85a3a | 39 | * @param * slope, the intercept of the linear relationship between resistance and temperature |
omatthews | 18:f5d26d3d532f | 40 | * @param R_ref (default value 1), optional parameter sets the target value for R |
omatthews | 18:f5d26d3d532f | 41 | **/ |
seoirsem | 23:65a9f9d85a3a | 42 | Heater(const int i_port, const int v_port, FastPWM * drive, FastPWM * guard, const float intercept, const float slope, float R_ref = 1); |
omatthews | 0:4e33cc8171f4 | 43 | |
omatthews | 0:4e33cc8171f4 | 44 | //Public member functions |
omatthews | 0:4e33cc8171f4 | 45 | |
omatthews | 18:f5d26d3d532f | 46 | void read(); //Updates the resistance and error values for the heater |
omatthews | 18:f5d26d3d532f | 47 | void hold(const int hold_time); //Holds R_ref for hold_time miliseconds |
omatthews | 18:f5d26d3d532f | 48 | void ramp_R(const int ramp_time, const float R_final, const float R_start); //Ramps for ramp_time miliseconds from R_start to R_final |
omatthews | 18:f5d26d3d532f | 49 | void output() const; //Prints the current state of the heater |
omatthews | 18:f5d26d3d532f | 50 | void turn_off(); //Turns the heater off |
omatthews | 1:4435d407d827 | 51 | |
omatthews | 1:4435d407d827 | 52 | |
omatthews | 2:7f15386fcc90 | 53 | //Getters and setters |
omatthews | 7:59ece353eea2 | 54 | void Set_R_ref(float R); |
omatthews | 18:f5d26d3d532f | 55 | float Get_R() const; |
omatthews | 7:59ece353eea2 | 56 | |
omatthews | 0:4e33cc8171f4 | 57 | |
omatthews | 0:4e33cc8171f4 | 58 | protected: |
omatthews | 0:4e33cc8171f4 | 59 | |
omatthews | 0:4e33cc8171f4 | 60 | |
omatthews | 18:f5d26d3d532f | 61 | int curr; //Latest current reading from ADC |
omatthews | 18:f5d26d3d532f | 62 | int v; //Latest voltage reading from ADC |
omatthews | 18:f5d26d3d532f | 63 | float R; //Latest resistance calculated from ADC current and voltage |
omatthews | 18:f5d26d3d532f | 64 | float R_ref; //Current referance for resistance |
omatthews | 18:f5d26d3d532f | 65 | float error; //R_ref - R |
seoirsem | 23:65a9f9d85a3a | 66 | |
seoirsem | 23:65a9f9d85a3a | 67 | |
omatthews | 18:f5d26d3d532f | 68 | //float error_diff; //Differential error |
omatthews | 18:f5d26d3d532f | 69 | float error_integrated; //Integrated error |
omatthews | 1:4435d407d827 | 70 | |
omatthews | 18:f5d26d3d532f | 71 | const int i_port; //ADC port which corresponds to current measurements |
omatthews | 18:f5d26d3d532f | 72 | const int v_port; //ADC port which corresponds to voltage measurements |
seoirsem | 23:65a9f9d85a3a | 73 | const float intercept; |
seoirsem | 23:65a9f9d85a3a | 74 | const float slope; |
seoirsem | 23:65a9f9d85a3a | 75 | |
omatthews | 18:f5d26d3d532f | 76 | FastPWM * drive; //Pointer to the driver |
omatthews | 22:2d34a03ae57e | 77 | FastPWM * guard; //Pointer to the guard |
omatthews | 0:4e33cc8171f4 | 78 | }; |
omatthews | 0:4e33cc8171f4 | 79 | |
omatthews | 19:fccdd7127f94 | 80 | #endif |