![](/media/cache/profiles/090a24f78cd36ddf8f89779fc5ab22a8.jpg.50x50_q85.png)
Origin firmware.
Dependencies: PID QEI SB1602E mbed-rtos mbed
Fork of PreHeater by
main.cpp
- Committer:
- kazu_zamasu
- Date:
- 2015-06-13
- Revision:
- 1:f974481c37b6
- Parent:
- 0:b1d44d6f9adf
- Child:
- 2:387240c58110
File content as of revision 1:f974481c37b6:
#include "mbed.h" #include "PID.h" #include "QEI.h" #include "rtos.h" #include "math.h" #define ROTATE_PER_REVOLUTIONS 24 //QEI 1 rotate by count #define THR 560 /PTH pull up register value #define THB 3380 //PTH B number #define THCR 10000 //25C PTH register #define OV_LL 0.0 //PID calcurate output value 0.0 = 0% #define OV_HL 1.0 //PID calcurate output value 1.0 = 100% #define SV_LL 0.0 //PID setpoint % value for lo limit #define SV_HL 100.0 //PID setpoint % value for high limit #define P 1.0 //propotional band #define I 0.2 //Integral #define D 0.1 //Devide #define RATE 0.1 //update time sec #define Bias 0.2 //control output bias #define InitialSP 50.0 // PID initial setpoint #define RangeSPL 30.0 //calcurate celcius range #define RangeSPH 120.0 //same above //Kc, Ti, Td, interval PID TIC(P, I, D, RATE); //GPIO initilaize AnalogIn THAI(dp4); PwmOut out(dp1); DigitalOut led1(dp14),led2(dp28); DigitalIn Run(dp17,PullUp); //Rotary encode pin, pinmode and sppecification instance QEI wheel(dp11, PullUp, dp13, PullUp,NC, ROTATE_PER_REVOLUTIONS, QEI::X2_ENCODING); float temp_sv_input; double temp_pv,temp_cal; void TempCal_thread(void const *args) { while (true) { //input for change to 0 to 100% range by 50C to 120C temp_sv_input = wheel.getPulses() * 0.5 + RangeSPL; if (temp_sv_input <= RangeSPL){ temp_sv_input = RangeSPL; } else if (temp_sv_input >= RangeSPH){ temp_sv_input = RangeSPH; } temp_cal = THAI.read(); //six order polynomial temp_pv =-0.7964*pow(temp_cal,6.0) - 2.5431*pow(temp_cal,5.0) +63.605*pow(temp_cal,4.0) - 274.1*pow(temp_cal,3.0) + 522.57*pow(temp_cal,2.0) - 539.26*temp_cal + 405.76; Thread::wait(500); //Insert LCD code /*xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx */ } } int main(){ Thread thread(TempCal_thread); while (1){ //Analog input from 50.0C to 120.0C TIC.setInputLimits(SV_LL, SV_HL); //Pwm output from 0.0 to 1.0 TIC.setOutputLimits(OV_LL, OV_HL); //If there's a bias. TIC.setBias(Bias); TIC.setMode(Run); //We want the process variable to be 1.7V TIC.setSetPoint(temp_sv_input); if (Run == 1){ out = OV_LL; } else if (Run == 0){ //Update the process variable. TIC.setProcessValue(temp_cal); //Set the new output. out = TIC.compute(); //Wait for another loop calculation. Thread::wait(RATE); } } }