void loop() {
if(stringComplete) {
// Serial.println(inputString);
if(inputString.equals("{open_valve}")) {
// Serial.println("inputString equates :)");
open_valve();
}
if(inputString.equals("{close_valve}")) {
// Serial.println("close vavle.");
close_valve();
}
if(valve_open) {
// Serial.println("valve_open = true");
inputString = "";
stringComplete = false;
while(getFlow4()) {
}
// Serial.println("I'm here now :)");
}
// clear the string:
inputString = "";
stringComplete = false;
}
//Serial.println("over and over");
}
// flowmeter stuff
bool getFlow4() {
// call the countdown function for pouring beer
// Serial.println(flowmeterPin);
flowmeterPinState = digitalRead(flowmeterPin);
// Serial.println(flowmeterPinStatePinState);
volatile unsigned long currentMillis = millis();
// if the predefined interval has passed
if (millis() - lastmillis >= 250) { // Update every 1/4 second
// disconnect flow meter from interrupt
detachInterrupt(0); // Disable interrupt when calculating
// numTicks = 0; // Restart the counter.
lastmillis = millis(); // Update lastmillis
attachInterrupt(0, count, FALLING); // enable interrupt
}
// Serial.print(numTicks);
if(numTicks >= 475 || valveClosed == 1) {
close_valve();
numTicks = 0; // Restart the counter.
valveClosed = 0;
return 0;
}
}
int error(int error_type)
{
/*---- Stop pump if error occurs ----*/
switch(error_type)
{
case 0: // success! all LEDs on.
PORTD = 0x00;
stop_pump();
close_valve();
break;
case 1: // overpressure - LED0 on
PORTD = ~(0x01);
stop_pump();
close_valve();
break;
case 2: // cannot reach adequate pressure - LED1
PORTD = ~(0x02);
stop_pump();
close_valve();
break;
case 3: // cannot sustain adequate pressure - LED2
PORTD = ~(0x04);
stop_pump();
close_valve();
break;
case 4: // cannot bleed vacuum bell - LED3
PORTD = ~(0x08);
stop_pump();
close_valve();
break;
default:
break;
}
return 1;
}
int main(void)
{
/* Init */
int pump_timer = 0;
int i = 0;
uint16_t tzero = 0;
DDRD = 0xff; // initialize port B for output LEDs
PORTD = 0xff; // all LEDs initially OFF
init_timer2();
initIO();
sei();
for (int j=0; j < NUM_CYCLES; j++) {
/* Retain for testing: Use to test delay function */
//Delay(120);
//while(1) PORTD=0;
/* Retain for testing: use to cycle pressure read */
//while(1)
//read_pressure();
read_pressure();
close_valve();
tzero = second; // start time for each section of test
// 'second' is a global RTC variable
/*---- Initial pump cycle ----*/
while ((second - tzero) < PUMP_TIME && pressure < MAX_HI_PRESS) {
read_pressure();
start_pump();
if (pressure > (MAX_HI_PRESS + 200)) // overpressure
while (error(1));
}
stop_pump();
if (pressure < MAX_HI_PRESS) // error if target pressure no reached
while (error(2));
/*---- Vacuum dwell starts here ----*/
tzero = second;
while ((second - tzero) < DWELL_TIME) {
read_pressure();
if (pressure > (MAX_HI_PRESS + 200)) //overpressure
while (error(1));
if (pressure < MIN_HI_PRESS) {
pump_timer = 0;
while (pressure < MAX_HI_PRESS && ((second - tzero) < DWELL_TIME)) {
start_pump();
read_pressure();
for (i=0; i<1000; i++) // 1 sec busy-wait
delay_ms(1.0);
pump_timer++;
if (pump_timer >= 120) // don't run pump 120 seconds
while (error(3));
if (pressure > (MAX_HI_PRESS + 200)) //overpressure
while (error(1));
}
stop_pump();
}
}
stop_pump();
/*---- Bleed cycle start ----*/
open_valve();
tzero = second;
while ((second - tzero) < BLEED_TIME && pressure > MAX_LO_PRESS)
read_pressure();
if (pressure > MAX_LO_PRESS)
while (error(4));
/*---- Ambient pressure dwell ----*/
delay(DWELL_TIME);
//lower = pressure & 0x00ff;
//upper = (pressure & 0xff00)>>8;
//PORTD = lower;
//for (i=0; i<1000; i++) _delay_ms(1.0);
//Delay(1);
//PORTD = upper;
//for (i=0; i<1000; i++) _delay_ms(1.0);
//while(1);
}
while(1) // completed successfully without errors!
error(0);
return 0;
}