Heater files
Dependents: LEX-Demo-Firmware-Logging LEX-Demo-Firmware-Logging
Heater.cpp@0:4e33cc8171f4, 2019-07-17 (annotated)
- Committer:
- omatthews
- Date:
- Wed Jul 17 07:54:07 2019 +0000
- Revision:
- 0:4e33cc8171f4
- Child:
- 1:4435d407d827
First attempt to add in heater
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 | 0:4e33cc8171f4 | 7 | |
omatthews | 0:4e33cc8171f4 | 8 | #include "Heater.h" |
omatthews | 0:4e33cc8171f4 | 9 | #include "ADS8568_ADC.h" |
omatthews | 0:4e33cc8171f4 | 10 | |
omatthews | 0:4e33cc8171f4 | 11 | extern ADS8568_ADC adc; |
omatthews | 0:4e33cc8171f4 | 12 | extern float scale_factors[8]; |
omatthews | 0:4e33cc8171f4 | 13 | extern Timer timer; |
omatthews | 0:4e33cc8171f4 | 14 | extern int MEAS_DELAY; |
omatthews | 0:4e33cc8171f4 | 15 | extern int N_ROLL_AVG; |
omatthews | 0:4e33cc8171f4 | 16 | |
omatthews | 0:4e33cc8171f4 | 17 | |
omatthews | 0:4e33cc8171f4 | 18 | Heater::Heater(int i_port, int v_port, DigitalOut drive, float R_set) |
omatthews | 0:4e33cc8171f4 | 19 | :i_port(i_port),v_port(v_port),drive(drive), R_set(R_set){} |
omatthews | 0:4e33cc8171f4 | 20 | |
omatthews | 0:4e33cc8171f4 | 21 | |
omatthews | 0:4e33cc8171f4 | 22 | void Heater::read_R() |
omatthews | 0:4e33cc8171f4 | 23 | { |
omatthews | 0:4e33cc8171f4 | 24 | adc.read_channels(); |
omatthews | 0:4e33cc8171f4 | 25 | i = adc.read_channel_result(i_port)/scale_factors[i_port]; |
omatthews | 0:4e33cc8171f4 | 26 | v = adc.read_channel_result(v_port)/scale_factors[v_port]; |
omatthews | 0:4e33cc8171f4 | 27 | if (i != 0) R = v/i; |
omatthews | 0:4e33cc8171f4 | 28 | } |
omatthews | 0:4e33cc8171f4 | 29 | |
omatthews | 0:4e33cc8171f4 | 30 | void Heater::hold(int hold_time) |
omatthews | 0:4e33cc8171f4 | 31 | { |
omatthews | 0:4e33cc8171f4 | 32 | int end_time = timer.read_ms() + hold_time; |
omatthews | 0:4e33cc8171f4 | 33 | while (int time = timer.read_ms() < end_time) |
omatthews | 0:4e33cc8171f4 | 34 | { |
omatthews | 0:4e33cc8171f4 | 35 | drive = 1; |
omatthews | 0:4e33cc8171f4 | 36 | wait_us(MEAS_DELAY); |
omatthews | 0:4e33cc8171f4 | 37 | read_R(); |
omatthews | 0:4e33cc8171f4 | 38 | while (float R_avg = ((N_ROLL_AVG-1)*R_avg + R)/N_ROLL_AVG > R_set) |
omatthews | 0:4e33cc8171f4 | 39 | { |
omatthews | 0:4e33cc8171f4 | 40 | drive = 0; |
omatthews | 0:4e33cc8171f4 | 41 | wait_us(MEAS_DELAY); |
omatthews | 0:4e33cc8171f4 | 42 | read_R(); |
omatthews | 0:4e33cc8171f4 | 43 | } |
omatthews | 0:4e33cc8171f4 | 44 | } |
omatthews | 0:4e33cc8171f4 | 45 | } |
omatthews | 0:4e33cc8171f4 | 46 | |
omatthews | 0:4e33cc8171f4 | 47 | void Heater::Set_R_set(float R) {R_set = R;} |
omatthews | 0:4e33cc8171f4 | 48 | |
omatthews | 0:4e33cc8171f4 | 49 | float Heater::Get_R() {return R;} |
omatthews | 0:4e33cc8171f4 | 50 |