Victor Szultka
Simulation of a chemical etch wetbench tank
main.cpp
- Committer:
- saltire78
- Date:
- 2020-07-31
- Revision:
- 0:1a475dea8e4f
File content as of revision 0:1a475dea8e4f:
// including necessary header folders
#include"mbed.h"
#include"C12832.h"
// declaring necessary components and variables
Serial pc(USBTX,USBRX); //USB tx,rx
C12832 lcd(p5,p7,p6,p8,p11); //Breakout board lcd
AnalogIn lvl(p19); //pot1 level sensor
AnalogIn temp(p20); //pot2 temperature sensor
DigitalIn start(p15); //joystick up start button
DigitalIn prod(p13); //joystick left product detected in tank (simulates sensor input)
DigitalOut invalve(LED1); //LED1 represents an input valve to fill the tank - open is true
DigitalOut outvalve(LED2); //LED2 represents an output valve to empty the tank - open is true
DigitalOut heatstir(LED3); //LED3 represents an heater and stirrer to maintain temp and stir the tank - on is true
DigitalOut sysrun(LED4); //LED4 represents a Clear To Run signal outputted to system to allow product loading - on is true
Timer debounce;
InterruptIn emo(p14); //joystick button EMO activation button (Interrupt)
InterruptIn stop(p12); //joystick down stop button (Interrupt)
/* criteria set for tank level between 0 and 25 litres, temperature between 0 and 200 degrees C.
Low/High levels represent acceptable manufacturing level. Critical levels will indicate system/equipment failure and dump tank.
Chemical lifespan is set to 50 hours of production and production time for each lot in tool is 1.5hrs */
float lvlset=20.0, lvllo=15.0, lvlhi=23.0, lvlhihi=24.0; // tank level criteria - current level, setpoint, lowest level, high level, critical high
float tmpset=150.0, tmplo=130.0, tmphi=170.0, tmphihi=190.0; // tank temperature criteria - current temp, setpoint, lowest level, high level, critical high
float tanklife=50.0, prodtime=1.5; // production criteria - lifespan of chemicals, production time per lot
int ctf=0, cth, ctr, prodpres; // flags for clear to fill, clear to heat, clear to run, product in tank - in all cases clear is true
// Interrupt program for Emergency Manual Overide activation
void override(){
debounce.start(); // start the timer
invalve=0; // close input valve
outvalve=1; // dump tank
heatstir=0; // stop heater
ctf=0; // clear to fill to false
cth=0; // clear to heat to false
ctr=0; // clear to run to false
lcd.cls(); // clear LCD screen
lcd.locate(0,0); // home the lcd screen
lcd.printf("EMO activated!\nContact Equipment Group!\nDumping Tank"); //print emo text on LCD
pc.printf("EMO activated! Contact Equipment Group! Dumping Tank\n\r"); //print emo text on pc
if (debounce.read_ms() >= 500){ // determine the timer limits - greater than or equal incase the exact count was missed by timer
debounce.reset(); // reset the timer for the next use
}
}
// Interrupt program for Stop button activation
void halt(){
debounce.start(); // start the timer
invalve=0; // close input valve
outvalve=0; // close output valve
heatstir=0; // stop heater
ctf=0; // clear to fill to false
cth=0; // clear to heat to false
ctr=0; // clear to run to false
lcd.cls(); // clear LCD screen
lcd.locate(0,0); // home the lcd screen
lcd.printf("Stop Pressed!\nContact Equipment Group!\nHold to verify"); //print stop text on LCD
pc.printf("Stop Pressed! Contact Equipment Group! Hold to verify production ok!\n\r"); //print stop text on pc
if (debounce.read_ms() >= 500){ // determine the timer limits - greater than or equal incase the exact count was missed by timer
debounce.reset(); // reset the timer for the next use
}
}
// Start of main program
int main(){
// define emo interrupt
emo.rise(&override); //attach the function address to the rising edge
// define Stop interrupt
stop.rise(&halt); //attach the function address to the rising edge
while(1){ //always on loop
float level=25.0*lvl+0; //define the current tank level (y=mx+c)
float temperature=200.0*temp+0; //define the current tank temperature (y=mx+c)
// initial start conditions are an error or a start button press
if(ctf==0 and prod==1){ //load error detected - product in tank/sensor failure
lcd.cls(); //clear LCD screen
lcd.locate(0,0); //error - home the lcd screen
lcd.printf("System Error!\nContact Equipment Group!\nProduct detected in tank!"); //error - print error text on LCD
pc.printf("System Error! - Contact Equipment Group! - Product detected in tank!\n\r"); //error - print error text via terraterm to pc
}
if(ctf==0 and start==1){ //start button goes true (momentary)
ctf=1; //clear to fill flag goes true (set)
lcd.cls(); //clear LCD screen
lcd.locate(0,0); //home LCD screen
lcd.printf("Start Button Pressed"); //print start text on LCD
pc.printf("Start Button Pressed\n\r"); //clear to fill flag goes true (set) - only stop/emo/dump will unset this
wait(0.5); //debounce delay
}
//if cleared to fill various states are possible based upon volume detected
if(ctf==1){ //clearance given to run
if(level<lvllo){ //tank below lowest usable level
invalve=1; //open the input valve
outvalve=0; //close the output valve
cth=0; //heat/stir flag set to false
lcd.cls(); //LCD screen cleared
lcd.locate(0,0); //LCD homed
lcd.printf("Level: %2.1f\nTemp: %3.1f\nTank Filling",level,temperature); //status to LCD
pc.printf("Tank level: %2.1f, Tank temperature: %3.1f, Tank filling\n\r",level,temperature); //status to pc
wait(1); //pause for 1 second to prevent flood of data
}
else if(level<lvlset){ //minimum usable volume reached, heating now allowed
invalve=1; //filling to setpoint
outvalve=0; //closed output valve
cth=0; //clear to heat flag goes true (set)
lcd.cls(); //LCD screen cleared
lcd.locate(0,0); //LCD homed
lcd.printf("Level: %2.1f\nTemp: %3.1f\nTank Level Low",level,temperature); //status to LCD
pc.printf("Tank level: %2.1f, Tank temperature: %3.1f, Tank level low\n\r",level,temperature); //status to pc
wait(1); //pause for 1 second to prevent flood of data
}
else if(level<lvlhi){ //volume setpoint reached
invalve=0; //input valve closed
outvalve=0; //output valve remains closed
cth=1; //clear to fill flag remains true
lcd.cls(); //LCD screen cleared
lcd.locate(0,0); //LCD homed
lcd.printf("Level: %2.1f\nTemp: %3.1f\nAt Level Setpoint",level,temperature); //status to LCD
pc.printf("Tank level: %2.1f, Tank temperature: %3.1f, Tank at level setpoint\n\r",level,temperature); //status to pc
wait(1); //pause for 1 second to prevent flood of data
}
else if(level<lvlhihi){ //warning state - volume goes high enough to flag - possible ceased input valve/system error
invalve=0; //input valve off command reconfirmed
outvalve=1; //output valve opened to release volume
cth=0; //clear to heat flag goes false (set)
lcd.cls(); //LCD screen cleared
lcd.locate(0,0); //LCD homed
lcd.printf("Level: %2.1f\nTemp: %3.1f\nTank Level High!",level,temperature); //status to LCD
pc.printf("Tank level: %2.1f, Tank temperature: %3.1f, Tank Level High Warning!\n\r",level,temperature); //status to pc
wait(1); //pause for 1 second to prevent flood of data
}
else if(lvlhihi<=level){ //critical state - critical volume detected, overflow risk - emergency dump
invalve=0; // input valve closed
outvalve=1; //output valve open to dump
cth=0; //clear to heat flag remains false
ctf=0; //clear to fill flag goes false - tool returned to start conditions
lcd.cls(); //LCD screen cleared
lcd.locate(0,0); //LCD homed
lcd.printf("Level: %2.1f\nTemp: %3.1f\nLevel Critical! Tank Dump",level,temperature); //status to LCD
pc.printf("Tank level: %2.1f, Tank temperature: %3.1f, Tank Overflow Risk! Dumping Tank\n\r",level,temperature); //status to pc
wait(1); //pause for 1 second to prevent flood of data
}
}
//if cleared to heat various states are possible based upon volume detected
if(cth==1){ //clearance given to run heater/stirrer
if(temperature<tmplo){ //tank below lowest usable temperature
heatstir=1; //turn on the heater/stirrer
ctr=0; //clear to run flag set to false
lcd.cls(); //LCD screen cleared
lcd.locate(0,0); //LCD homed
lcd.printf("Level: %2.1f\nTemp: %3.1f\nTank Heating",level,temperature); //status to LCD
pc.printf("Tank level: %2.1f, Tank temperature: %3.1f, Tank Temperature Low, Heater on\n\r",level,temperature); //status to pc
wait(1); //pause for 1 second to prevent flood of data
}
else if(temperature<tmpset){ //minimum usable temperature reached, running now allowed
heatstir=1; //heating to setpoint
ctr=1; //clear to run flag goes true (set)
sysrun=1; //output to system to begin loading product
lcd.cls(); //LCD screen cleared
lcd.locate(0,0); //LCD homed
lcd.printf("Level: %2.1f\nTemp: %3.1f\nTemp Low",level,temperature); //status to LCD
pc.printf("Tank level: %2.1f, Tank temperature: %3.1f, Temperaturelow, ok to run\n\r",level,temperature); //status to pc
wait(1); //pause for 1 second to prevent flood of data
}
else if(temperature<tmphi){ //temp setpoint reached
heatstir=0; //heater off
ctr=1; //clear to run flag remains true
sysrun=1; //output to system to begin loading product
lcd.cls(); //LCD screen cleared
lcd.locate(0,0); //LCD homed
lcd.printf("Level: %2.1f\nTemp: %3.1f\nTemp at Setpoint",level,temperature); //status to LCD
pc.printf("Tank level: %2.1f, Tank temperature: %3.1f, Tank at temperature setpoint\n\r",level,temperature); //status to pc
wait(1); //pause for 1 second to prevent flood of data
}
else if(temperature<tmphihi){ //warning state - temp goes high enough to flag - possible ceased heater/system error
heatstir=0; //input valve off command reconfirmed
ctr=0; //clear to heat flag goes false (set)
lcd.cls(); //LCD screen cleared
lcd.locate(0,0); //LCD homed
lcd.printf("Level: %2.1f\nTemp: %3.1f\nTemp High!",level,temperature); //status to LCD
pc.printf("Tank level: %2.1f, Tank temperature: %3.1f, Tank Temperature High Warning!\n\r",level,temperature); //status to pc
wait(1); //pause for 1 second to prevent flood of data
}
else if(tmphihi<=temperature){ //critical state - critical volume detected, overflow risk - emergency dump
heatstir=0; // input valve closed
ctr=0; //clear to run flag goes false
cth=0; //clear to heat flag goes false
ctf=0; //clear to fill flag goes false - tool returned to start conditions
lcd.cls(); //LCD screen cleared
lcd.locate(0,0); //LCD homed
lcd.printf("Level: %2.1f\nTemp: %3.1f\nTemp Critical! Tank Dump",level,temperature); //status to LCD
pc.printf("Tank level: %2.1f, Tank temperature: %3.1f, Tank Overheated, Production Risk! Dumping Tank\n\r",level,temperature); //status to pc
wait(1); //pause for 1 second to prevent flood of data
}
}
if(ctr==1){ //clearance given to run heater/stirrer
if(prod==1){ //when product arrives at station and triggers sensor
tanklife-=prodtime; //chemical time is reduced by set amount of production time
}
lcd.cls(); //LCD screen cleared
lcd.locate(0,0); //LCD homed
lcd.printf("Level: %2.1f L\nTemp: %3.1f C\nChem Time: %3.1f Hrs",level,temperature,tanklife); //status to LCD
pc.printf("Tank level: %2.1f, Tank temperature: %3.1f, Remaining Chem hours: %3.1f\n\r",level,temperature,tanklife); //status to pc
wait(1); //clearance given to run heater/stirrer
}
if(tanklife<=0){ //when usable lifespan of chemical expires
ctr=0; //clear to run flag goes false
cth=0; //clear to heat flag goes false
ctf=0; //clear to fill flag goes false
sysrun=0; //command to run production rescinded
lcd.cls(); //LCD screen cleared
lcd.locate(0,0); //LCD homed
lcd.printf("Level: %2.1f\nTemp: %3.1f\nChem Time Over, Dump!",level,temperature); //status to LCD
pc.printf("Tank level: %2.1f, Tank temperature: %3.1f, Chemical time limit expired! Dumping Tank\n\r",level,temperature); //status to pc
wait(1); //pause for 1 second to prevent flood of data
}
} // while loop end
} // main end