#define PIN_TRIG 3
#define PIN_ECHO 2
#define DIST_DELAY 1000
#define STEP_DELAY 10
#define STEPS_PER_REV 200
#include <Stepper.h>

// initialize the stepper library on pins 8 through 11:
Stepper myStepper(STEPS_PER_REV, 8, 9, 10, 11);

float distSensOldTime = 0; 
float stepSensOldTime = 0; 
bool runDistance = true; 
bool runSteppers = true; 

void setup() {
  Serial.begin(115200);
  pinMode(PIN_TRIG, OUTPUT);
  pinMode(PIN_ECHO, INPUT);
  myStepper.setSpeed(60); 
}

void loop() {

  RunBools();

  if(runDistance)
  {
    runDistance = false; 
    distSensOldTime = millis(); 
    digitalWrite(PIN_TRIG, HIGH);
    delayMicroseconds(10);
    digitalWrite(PIN_TRIG, LOW);

    // Read the result:
    int duration = pulseIn(PIN_ECHO, HIGH);
    
    Serial.print("Distance in CM: ");
    Serial.println(duration / 58);
    Serial.print("Distance in inches: ");
    Serial.println(duration / 148);
    
  }

  

  if(runSteppers)
  {

    myStepper.step(STEPS_PER_REV);
  }
}

void RunBools() 
{
  float curTime = millis();
  if(curTime - distSensOldTime > DIST_DELAY)
  {
    runDistance = true; 
  }

  if(curTime - stepSensOldTime > STEP_DELAY)
  {
    runSteppers = true; 
  }
}