// experiment 2 interfacing with motor , buzzer and display
#include <LiquidCrystal.h>
// pins connected
#define Ap 10  // A+ line
#define Am 11  // A- line
#define Bp 9   //  .
#define Bm 8   //  .


LiquidCrystal lcd(7,6,5,4,3,2);


void setup() {
  // set output
  pinMode(Ap,OUTPUT);  pinMode(Am,OUTPUT);
  pinMode(Bp,OUTPUT);  pinMode(Bm,OUTPUT);
  tone(13, 262, 250); // Plays 262Hz tone for 0.250 seconds
  lcd.begin(16, 2);
  // you can now interact with the LCD, e.g.:
  lcd.print("Hello World!");
}

int I = 0 ;
void loop() {
  // This is Wave Fullstep motion - only one coil energized at a time
  if ( I++ <25 ) {  // stop after 25*4 steps (=100) - quarter turn with gearRatio "2:1"
    delay(10);
    digitalWrite(Bm,LOW) ;  digitalWrite(Ap,HIGH);
    delay(10);
    digitalWrite(Ap,LOW) ;  digitalWrite(Bp,HIGH);
    delay(10);
    digitalWrite(Bp,LOW) ;  digitalWrite(Am,HIGH);
    delay(10);
    digitalWrite(Am,LOW) ;  digitalWrite(Bm,HIGH);
  } else while(1);
}