/*
-------------------------------------
Normally only for BOARD ELAVR32,
using AD0 as Analog-Digital-Converter
for 8 Resistor separated Keys.
-------------------------------------
*/


#ifndef ___KEY_H
#define ___KEY_H

#include "global.h"
#include "utils.h"


//if you will use another channel as channel 0
//like board elavr32, you can define it before.
#ifndef KEYADCCHANNEL
#define KEYADCCHANNEL 0
#endif


#define NOKEY		0


#define KEY_7 '7'
#define KEY_6 '6'
#define KEY_5 '5'
#define KEY_4 '4'
#define KEY_3 '3'
#define KEY_2 '2'
#define KEY_1 '1'
#define KEY_0 '0'


#define KEY_UP    KEY_7
#define KEY_LEFT  KEY_6
#define KEY_RIGHT KEY_5
#define KEY_DOWN  KEY_4

#define KEY_FUNC0 KEY_3
#define KEY_FUNC1 KEY_2
#define KEY_FUNC2 KEY_1
#define KEY_FUNC3 KEY_0



extern unsigned char testkey( void );

/*
 reads keyinput.
 if a key is pressed, tests ist for
 three times, with a difference of
 10 ms between every test.
 If same key pressed after this
 tests, function waits till key
 is released, then it returns the key.
 Otherwise 0 is returned.
*/
//this functions requires Delay1ms from utils.c
extern unsigned char readkey( void );

#endif