Heater files
Dependents: LEX-Demo-Firmware-Logging LEX-Demo-Firmware-Logging
Heater.cpp@2:7f15386fcc90, 2019-07-17 (annotated)
- Committer:
- omatthews
- Date:
- Wed Jul 17 13:55:33 2019 +0000
- Revision:
- 2:7f15386fcc90
- Parent:
- 1:4435d407d827
- Child:
- 3:313711a66929
- Child:
- 7:59ece353eea2
Commit for testing ADC error;
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
omatthews | 0:4e33cc8171f4 | 1 | /*------------------------------------------------------------------------------ |
omatthews | 0:4e33cc8171f4 | 2 | Library code file for interface to Heater |
omatthews | 0:4e33cc8171f4 | 3 | Date: 16/07/2018 |
omatthews | 0:4e33cc8171f4 | 4 | |
omatthews | 0:4e33cc8171f4 | 5 | |
omatthews | 0:4e33cc8171f4 | 6 | ------------------------------------------------------------------------------*/ |
omatthews | 1:4435d407d827 | 7 | #include "mbed.h" |
omatthews | 1:4435d407d827 | 8 | #include "MODSERIAL.h" |
omatthews | 0:4e33cc8171f4 | 9 | #include "Heater.h" |
omatthews | 0:4e33cc8171f4 | 10 | #include "ADS8568_ADC.h" |
omatthews | 0:4e33cc8171f4 | 11 | |
omatthews | 0:4e33cc8171f4 | 12 | extern ADS8568_ADC adc; |
omatthews | 0:4e33cc8171f4 | 13 | extern float scale_factors[8]; |
omatthews | 0:4e33cc8171f4 | 14 | extern Timer timer; |
omatthews | 1:4435d407d827 | 15 | extern DigitalIn adc_busy; |
omatthews | 1:4435d407d827 | 16 | extern MODSERIAL pc; |
omatthews | 1:4435d407d827 | 17 | |
omatthews | 0:4e33cc8171f4 | 18 | |
omatthews | 0:4e33cc8171f4 | 19 | |
omatthews | 0:4e33cc8171f4 | 20 | Heater::Heater(int i_port, int v_port, DigitalOut drive, float R_set) |
omatthews | 1:4435d407d827 | 21 | :R_set(R_set),i_port(i_port),v_port(v_port),drive(drive){} |
omatthews | 0:4e33cc8171f4 | 22 | |
omatthews | 0:4e33cc8171f4 | 23 | |
omatthews | 2:7f15386fcc90 | 24 | void Heater::read() |
omatthews | 0:4e33cc8171f4 | 25 | { |
omatthews | 1:4435d407d827 | 26 | //Reads R and then resets the drive back to its previous value |
omatthews | 1:4435d407d827 | 27 | int i = 0; |
omatthews | 1:4435d407d827 | 28 | int drive_prev = drive; |
omatthews | 1:4435d407d827 | 29 | drive = 1; |
omatthews | 1:4435d407d827 | 30 | wait_us(10); |
omatthews | 1:4435d407d827 | 31 | adc.start_conversion(ALL_CH); |
omatthews | 1:4435d407d827 | 32 | while(adc_busy == 1) |
omatthews | 1:4435d407d827 | 33 | { |
omatthews | 1:4435d407d827 | 34 | wait_us(1); |
omatthews | 1:4435d407d827 | 35 | i++; |
omatthews | 1:4435d407d827 | 36 | } |
omatthews | 2:7f15386fcc90 | 37 | |
omatthews | 2:7f15386fcc90 | 38 | drive = drive_prev; |
omatthews | 2:7f15386fcc90 | 39 | |
omatthews | 0:4e33cc8171f4 | 40 | adc.read_channels(); |
omatthews | 1:4435d407d827 | 41 | |
omatthews | 1:4435d407d827 | 42 | //pc.printf("conversion took %d us\n", i ); |
omatthews | 1:4435d407d827 | 43 | i=0; |
omatthews | 1:4435d407d827 | 44 | |
omatthews | 1:4435d407d827 | 45 | |
omatthews | 1:4435d407d827 | 46 | curr = adc.read_channel_result(i_port)/scale_factors[i_port]; |
omatthews | 0:4e33cc8171f4 | 47 | v = adc.read_channel_result(v_port)/scale_factors[v_port]; |
omatthews | 2:7f15386fcc90 | 48 | if (curr > 0) R = float(v)/float(curr); |
omatthews | 0:4e33cc8171f4 | 49 | } |
omatthews | 0:4e33cc8171f4 | 50 | |
omatthews | 2:7f15386fcc90 | 51 | |
omatthews | 2:7f15386fcc90 | 52 | |
omatthews | 2:7f15386fcc90 | 53 | |
omatthews | 0:4e33cc8171f4 | 54 | void Heater::hold(int hold_time) |
omatthews | 0:4e33cc8171f4 | 55 | { |
omatthews | 0:4e33cc8171f4 | 56 | int end_time = timer.read_ms() + hold_time; |
omatthews | 1:4435d407d827 | 57 | pc.printf("end time is %d \n",end_time); |
omatthews | 1:4435d407d827 | 58 | float R_avg = 0; |
omatthews | 1:4435d407d827 | 59 | while (timer.read_ms() < end_time) |
omatthews | 0:4e33cc8171f4 | 60 | { |
omatthews | 0:4e33cc8171f4 | 61 | drive = 1; |
omatthews | 0:4e33cc8171f4 | 62 | wait_us(MEAS_DELAY); |
omatthews | 2:7f15386fcc90 | 63 | read(); |
omatthews | 1:4435d407d827 | 64 | R_avg = ((N_ROLL_AVG-1)*R_avg + R)/N_ROLL_AVG; |
omatthews | 1:4435d407d827 | 65 | if (R_avg > R_set) |
omatthews | 0:4e33cc8171f4 | 66 | { |
omatthews | 0:4e33cc8171f4 | 67 | drive = 0; |
omatthews | 1:4435d407d827 | 68 | wait_us(2*MEAS_DELAY); |
omatthews | 0:4e33cc8171f4 | 69 | } |
omatthews | 1:4435d407d827 | 70 | |
omatthews | 0:4e33cc8171f4 | 71 | } |
omatthews | 1:4435d407d827 | 72 | } |
omatthews | 1:4435d407d827 | 73 | |
omatthews | 0:4e33cc8171f4 | 74 | |
omatthews | 0:4e33cc8171f4 | 75 | void Heater::Set_R_set(float R) {R_set = R;} |
omatthews | 0:4e33cc8171f4 | 76 | |
omatthews | 2:7f15386fcc90 | 77 | int Heater::Get_i() {return curr;} |
omatthews | 2:7f15386fcc90 | 78 | int Heater::Get_v() {return v;} |
omatthews | 2:7f15386fcc90 | 79 | |
omatthews | 0:4e33cc8171f4 | 80 | float Heater::Get_R() {return R;} |
omatthews | 0:4e33cc8171f4 | 81 | |
omatthews | 1:4435d407d827 | 82 | void Heater::turn_on () {drive = 1;} |
omatthews | 1:4435d407d827 | 83 | |
omatthews | 1:4435d407d827 | 84 | void Heater::turn_off () {drive = 0;} |