> Hi to all engineers,
>
> I am working on keypad routine that I ended up whole bunch of if's
> and I was wondering if it is ok to use it like that.

Hi Andre,

I have always used a method that scans the keyboard and returns a number.
Here's a snippet from my LCD terminal code at:
http://bobblick.com/techref/projects/lcdterm/lcdterm.html
Note I used Hitech C. I hope this doesn't wordwrap - it looks terrible on
my terminal here.
Cheerful regards,
Bob

byte scankb(void) {
	byte delay;
	byte key = 0;		// first key returns 0, no key returns KB_NO_KEY
	byte column = 0b00001000;	//RB3 is starting column.
//if you reduce columncount it will sequence through fewer columns -
ending earlier,
//or starting later if you choose a different start column
	byte columncount = 6;	// one more than the number of columns
	while(--columncount)
	{
		PORTB &= 0b00000111;
		PORTB |= column;	//energize column but leave low 3 pins untouched
		for (delay = 10; --delay;);		//this delay rejects key capacitance
	//test each row in sequence
		if(RA0)
			break;
		key++;
	//if you don't use all rows just remove
		if(RA1)
			break;
		key++;
	//or comment out ones you don't need
		if(RA2)
			break;
		key++;

		if(RA3)
			break;
		key++;

		column <<= 1;	//shift to left, energize next column
	}
	return key;
}

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