#include <SoftwareSerial.h>

#define coil1pin 10
#define coil2pin 12
#define coil3pin 11

#define swSerialRX 4
#define swSerialTX 5

#define sensor1pin 4
#define sensor2pin 3
#define sensor3pin 2

int impulsDelay = 1;
int impulsLength = 5;
int potValue = 1;
int individualAfterDelay = 10;
unsigned long i1wait = 0;
unsigned long i2wait = 0;
unsigned long i3wait = 0;

unsigned long previouscoil2trigger = 0;
unsigned long lastcoil2trigger = 0;

unsigned long lastdisplaywrite = 0;

int ballspeed = 0;

SoftwareSerial mySerial(swSerialRX, swSerialTX); // RX, TX

void setup() {

  // coil triggers
  
  pinMode(coil1pin,OUTPUT);
  pinMode(coil2pin,OUTPUT);
  pinMode(coil3pin,OUTPUT);

  // pulling them HIGH
  
  digitalWrite(coil1pin,HIGH);
  digitalWrite(coil2pin,HIGH);
  digitalWrite(coil3pin,HIGH);

  // ball sensors
  
  pinMode(sensor1pin,INPUT_PULLUP);
  pinMode(sensor2pin,INPUT_PULLUP);
  pinMode(sensor3pin,INPUT_PULLUP);

  // preparing Serial connections

  Serial.begin(9600);
  Serial.flush();
}

void loop() {
  // getting the pulse length from the pot
  //potValue = analogRead(A0);
  //impulsLength = map(potValue, 0, 1023, 0, 100);
  // sending data to the displayDriver every 1s
  
  // checking if ball detected, if yes then fire the pulse
  if (digitalRead(sensor1pin)) {
    impuls1();
  } else if (digitalRead(sensor2pin)) {
    impuls2();
  } else if (digitalRead(sensor3pin)) {
    impuls3();
  }
}

void impuls1() {
    if (i1wait > millis()) {
      return;
    }
    delay(impulsDelay);
    digitalWrite(coil1pin, LOW);
    delay(impulsLength);
    digitalWrite(coil1pin, HIGH);
    Serial.print("1 ");
    Serial.println(millis());
    i1wait = millis()+individualAfterDelay;
}

void impuls2() {
    if (i2wait > millis()) {
      return;
    }
    delay(impulsDelay);
    digitalWrite(coil2pin, LOW);
    delay(impulsLength);
    digitalWrite(coil2pin, HIGH);
    Serial.print("2 ");
    Serial.println(millis());
    i2wait = millis()+individualAfterDelay;

}

void impuls3() {
    if (i3wait > millis()) {
      return;
    }
    delay(impulsDelay);
    digitalWrite(coil3pin, LOW);
    delay(impulsLength);
    digitalWrite(coil3pin, HIGH);
    Serial.print("3 ");
    Serial.println(millis());
    i3wait = millis()+individualAfterDelay;
}