TVout and PS2 Keyboard on Arduino Uno

Using Arduino General Electronics
#1

Hello everyone.
First of all i apologize if the forum section is wrong for my question.

So, i have strange problem with using PS2 keyboard on a TV with Arduino Uno.

Those are the libraries that a use.

http://playground.arduino.cc/Main/TVout
http://playground.arduino.cc/Main/PS2Keyboard

My hardware works just fine, the wiring of the hardware is based on the libraries.

The problem itself is that 1 out of 3 characters is displaying wrong on the TV. Doesn’t matter how fast i type.

This is the main sketch code:

#include <TVout.h>
#include <fontALL.h>
#include <PS2Keyboard.h>

const int DataPin = 4;
const int IRQpin =  3;

TVout TV;

PS2Keyboard keyboard;

void setup() {
  delay(1000);
  TV.begin(PAL,184,72);
  TV.select_font(font6x8);
  delay(1000);
  keyboard.begin(DataPin, IRQpin);
}

void loop() {
  if (keyboard.available()) {
    
    // read the next key
    char c = keyboard.read();
    
    // check for some of the special keys
    if (c == PS2_ENTER) {
      TV.print("\n");
    } else if (c == PS2_TAB) {
      TV.print("[Tab]");
    } else if (c == PS2_ESC) {
      TV.print("[ESC]");
    } else if (c == PS2_PAGEDOWN) {
      TV.print("[PgDn]");
    } else if (c == PS2_PAGEUP) {
      TV.print("[PgUp]");
    } else if (c == PS2_LEFTARROW) {
      TV.print("[Left]");
    } else if (c == PS2_RIGHTARROW) {
      TV.print("[Right]");
    } else if (c == PS2_UPARROW) {
      TV.print("[Up]");
    } else if (c == PS2_DOWNARROW) {
      TV.print("[Down]");
    } else if (c == PS2_DELETE) {
      TV.print("[Del]");
    } else {
      
      delay(500);
      TV.print(c);
    }
  }
}

Also when a key is pressed, TV is flickering like there is somesort of noise in the signal.

I know this problem can be fixed with adding aditional Arduino for control of the keyboard, but i want to do it with 1 Arduino.

Any ideas about that?

Thanks in further.

#2

If you try a minimal sketch only using the TVout library without any of the keyboard stuff do you still have the same problem?

#3

pert:
If you try a minimal sketch only using the TVout library without any of the keyboard stuff do you still have the same problem?

Nope, it works just fine only with TV out.
Also i forgot to mention. If i use the serial monitor it also works fine, no wrong characters, no noise.

#4

Hello.
I fixed my problem using a different library for the PS2 keyboard.
This one - CLICK

I didn't check what is the difference between the two libraries. Will do that later.

Thanks for the help

#5