#include "PS2Keyboard.h"

const int DataPin = 3;
const int IRQpin =  2;


const int pinKBDCR =  12; // 

int DataBus[8] = {4, 5, 6, 7, 8, 9, 10, 11};

PS2Keyboard keyboard;

void setup()
{
   for (int count = 1; count <= 8; count++) {
    pinMode(DataBus[count-1], OUTPUT); 
  };
  pinMode(pinKBDCR, OUTPUT); 
  KBDCR_Disable();
  
  delay(1000);
  keyboard.begin(DataPin, IRQpin);
  Serial.begin(9600);
  Serial.println("Keyboard:");
 
}

void KBDCR_Enable()
{
  digitalWrite(pinKBDCR, HIGH);
}
void KBDCR_Disable()
{
  digitalWrite(pinKBDCR, LOW);
}

void loop() {
  KBDCR_Disable();
  
  if (keyboard.available()) {
    
    // read the next key
    char c = keyboard.read();
    
    // check for some of the special keys
    if (c == PS2_ENTER) {
      Serial.println();
    } else if (c == PS2_TAB) {
      Serial.print("[Tab]");
    } else if (c == PS2_ESC) {
      Serial.print("[ESC]");
    } else if (c == PS2_PAGEDOWN) {
      Serial.print("[PgDn]");
    } else if (c == PS2_PAGEUP) {
      Serial.print("[PgUp]");
    } else if (c == PS2_LEFTARROW) {
      Serial.print("[Left]");
    } else if (c == PS2_RIGHTARROW) {
      Serial.print("[Right]");
    } else if (c == PS2_UPARROW) {
      Serial.print("[Up]");
    } else if (c == PS2_DOWNARROW) {
      Serial.print("[Down]");
    } else if (c == PS2_DELETE) {
      Serial.print("[Del]");
    } else {
      
      // otherwise, just print all normal characters
      Serial.print(c);
    }

    //print c to register
    for (int count = 1; count <= 8 ; count++) 
    {
      if ((int)c & (1 << (count-1))) 
        digitalWrite(DataBus[count-1], HIGH);
      else
        digitalWrite(DataBus[count-1], LOW);
    }
    digitalWrite(DataBus[7], HIGH);
    KBDCR_Enable();
    delay(20);
  }
}