Heater files
Dependents: LEX-Demo-Firmware-Logging LEX-Demo-Firmware-Logging
Heater.cpp
- Committer:
- omatthews
- Date:
- 2019-07-17
- Revision:
- 1:4435d407d827
- Parent:
- 0:4e33cc8171f4
- Child:
- 2:7f15386fcc90
File content as of revision 1:4435d407d827:
/*------------------------------------------------------------------------------ Library code file for interface to Heater Date: 16/07/2018 ------------------------------------------------------------------------------*/ #include "mbed.h" #include "MODSERIAL.h" #include "Heater.h" #include "ADS8568_ADC.h" extern ADS8568_ADC adc; extern float scale_factors[8]; extern Timer timer; extern DigitalIn adc_busy; extern MODSERIAL pc; Heater::Heater(int i_port, int v_port, DigitalOut drive, float R_set) :R_set(R_set),i_port(i_port),v_port(v_port),drive(drive){} void Heater::read_R() { //Reads R and then resets the drive back to its previous value int i = 0; int drive_prev = drive; drive = 1; wait_us(10); adc.start_conversion(ALL_CH); while(adc_busy == 1) { wait_us(1); i++; } adc.read_channels(); drive = drive_prev; //pc.printf("conversion took %d us\n", i ); i=0; curr = adc.read_channel_result(i_port)/scale_factors[i_port]; v = adc.read_channel_result(v_port)/scale_factors[v_port]; if (curr != 0) R = v/curr; } void Heater::hold(int hold_time) { int end_time = timer.read_ms() + hold_time; pc.printf("end time is %d \n",end_time); float R_avg = 0; while (timer.read_ms() < end_time) { drive = 1; wait_us(MEAS_DELAY); read_R(); R_avg = ((N_ROLL_AVG-1)*R_avg + R)/N_ROLL_AVG; if (R_avg > R_set) { drive = 0; wait_us(2*MEAS_DELAY); } } } void Heater::Set_R_set(float R) {R_set = R;} float Heater::Get_R() {return R;} void Heater::turn_on () {drive = 1;} void Heater::turn_off () {drive = 0;}