direct manipulation port for DUE

Official Hardware Mega Due
11

Hi Palliser,
You can answer me can write code in 32 bit mode. Is it possible to translate described below code.

#define encoder_a 22 
#define encoder_b 23 
#define motor_step 53
#define motor_direction 52

volatile long motor_position, encoder;

void setup () {
  pinMode(motor_step, OUTPUT);
  pinMode(motor_direction, OUTPUT);
  
  pinMode(encoder_a, INPUT);
  pinMode(encoder_b, INPUT);
  digitalWrite(encoder_a, HIGH); 
  digitalWrite(encoder_b, HIGH); 
  
  attachInterrupt(22, encoderPinChangeA, CHANGE);
  attachInterrupt(23, encoderPinChangeB, CHANGE);
  encoder = 0; 
}

void loop() {
  if (encoder > 0) {
    digitalWrite(motor_direction, HIGH);
    digitalWrite(motor_step, HIGH);
    digitalWrite(motor_step, LOW);
    delayMicroseconds(600);
    motor_position++;
    encoder = 0; 
  }
  else if (encoder < 0) {
    digitalWrite (motor_direction, LOW); 
    digitalWrite (motor_step, HIGH);
    digitalWrite (motor_step, LOW);
    delayMicroseconds(600);
    motor_position--;
    encoder = 0; 
  }
}

void encoderPinChangeA() {
  if (digitalRead(encoder_a)==digitalRead(encoder_b)) {
    encoder--;
  }
  else{
      encoder++;
  }
}

void encoderPinChangeB() {
  if (digitalRead(encoder_a) != digitalRead(encoder_b)) {
    encoder--;
  }
  else {
    encoder++;
  }
 }