#include <Arduino.h>

const int ARRAY_SIZE = 500; // Ukuran array yang aman di Wokwi/Uno
byte sourceArray[ARRAY_SIZE];
byte destArray[ARRAY_SIZE];
const int LED_PIN = 13;

void setup() {
  Serial.begin(115200); // Gunakan kecepatan tinggi di Wokwi
  pinMode(LED_PIN, OUTPUT);
  
  // Isi array sumber
  for (int i = 0; i < ARRAY_SIZE; i++) {
    sourceArray[i] = i % 256;
  }
  
  Serial.println("--- PENGUJIAN PROGRAMMED I/O DIMULAI ---");
}

void loop() {
  // Pekerjaan Sampingan CPU (LED Blink)
  digitalWrite(LED_PIN, HIGH);
  delay(1);
  digitalWrite(LED_PIN, LOW);
  delay(1);
  
  // Hanya jalankan PI/O sekali per loop
  static bool pio_done = false;
  if (!pio_done) {
      unsigned long startTime = micros();
      
      // Transfer Data (CPU melakukan transfer - BLOCKING)
      for (int i = 0; i < ARRAY_SIZE; i++) {
        destArray[i] = sourceArray[i]; 
      }
      
      unsigned long endTime = micros();
      unsigned long duration = endTime - startTime;
      
      Serial.print("PI/O: Waktu transfer ");
      Serial.print(ARRAY_SIZE);
      Serial.print(" byte: ");
      Serial.print(duration);
      Serial.println(" us");
      
      // Analisis: 
      Serial.println("PI/O: Estimasi Beban CPU selama transfer: 100% (Blocking).");
      Serial.println("----------------------------------------------");
      
      pio_done = true;
  }
  
  // Loop terus berjalan, LED terus berkedip (setelah transfer selesai)
}