#include <AccelStepper.h>

// AccelStepper Setup
AccelStepper stepperL4(1, 2, 3);  // Defines a stepper and the pins it will use


// Define the Pins used
#define step_pin 2    // Uno Pin 2 connected to A4988 STEP pin
#define dir_pin 3     // UNO Pin 3 connected to A4988 DIRECTION pin
#define home_switch 9 // UNO Pin 9 connected to Home Switch (MicroSwitch)

int direction;    // Variable to set Rotation (CW-CCW) of the motor
int steps;        // Used to set HOME position after Homing is completed
int analogPin = A0;      // potentiometer wiper (middle terminal) connected to analog pin 0
int val = 0; 

void setup() {
   stepperL4.setMaxSpeed(2000);
   stepperL4.setAcceleration(6000);

   pinMode(dir_pin, OUTPUT);
   pinMode(step_pin, OUTPUT);
   pinMode(home_switch, INPUT_PULLUP);
   pinMode(7, OUTPUT);
   
// Start Homing procedure of Stepper Motor at startup

  while (digitalRead(home_switch)) {  // Do this until the switch is activated   
    digitalWrite(dir_pin, HIGH);      // (HIGH = CCW / LOW = CW)
    digitalWrite(step_pin, HIGH);
    delay(1);                       // Delay to slow down speed of Stepper
    digitalWrite(step_pin, LOW);
    delay(1);   
}

  while (!digitalRead(home_switch)) { // Do this until the switch is not activated
    digitalWrite(dir_pin, HIGH); 
    digitalWrite(step_pin, HIGH);
    delay(1);                       // More delay to slow even more while moving away from switch
    digitalWrite(step_pin, LOW);
    delay(1);
  }

  steps=0;  // Reset position variable to zero
   
}

void loop()
//Bandswitching   
      { 
            val = analogRead(analogPin);                                 
            if(val<5)                   
              {
              stepperL4.moveTo(-8000);  //160m Inductor Position
              stepperL4.run();
              }
            else if(val>138 && val<150)
              {
              stepperL4.moveTo(-7000);  //80m Inductor Position
              stepperL4.run();
              }
            else if(val>284 && val<300) 
              {
              stepperL4.moveTo(-6000);  //40m Inductor Position
              stepperL4.run();
              }
            else if(val>430 && val<450) 
              {
              stepperL4.moveTo(-5000);  //20m Inductor Position
              stepperL4.run();
              }
            else if(val>578 && val<600)
              {
              stepperL4.moveTo(-4000);  //17m Inductor Position
              stepperL4.run();
              } 
            else if(val>724 && val<740)
              {
              stepperL4.moveTo(-3000);  //15m Inductor Position
              stepperL4.run();
              } 
            else if(val>870 && val<890) 
              {
              stepperL4.moveTo(-2000);  //12m Inductor Position
              stepperL4.run();
              } 
            else if(val>1010) 
              {
              stepperL4.moveTo(-1000);  //10m Inductor Position
              stepperL4.run();
              }
              
      }