#include <stdint.h>
#include <avr/interrupt.h>

uint8_t get_key_press( uint8_t key_mask );
uint8_t get_key_rpt( uint8_t key_mask );
uint8_t get_key_state( uint8_t key_mask );
uint8_t get_key_short( uint8_t key_mask );
uint8_t get_key_long( uint8_t key_mask );
void init_entprell(void);

#define KEY_DDR         DDRB
#define KEY_PORT        PORTB
#define KEY_PIN         PINB
#define KEY0            0
#define KEY1            1
#define KEY2            2
#define ALL_KEYS        (1<<KEY0 | 1<<KEY1 | 1<<KEY2)

#define REPEAT_MASK     (1<<KEY1 | 1<<KEY2)       // repeat: key1, key2
#define REPEAT_START    50                        // after 500ms
#define REPEAT_NEXT     20                        // every 200ms
#define F_TIMER1        100                       // Timer 1 frequency /Hz

extern volatile uint8_t key_state;    // debounced and inverted key state:
                                      // bit = 1: key pressed
extern volatile uint8_t key_press;    // key press detect

extern volatile uint8_t key_rpt;      // key long press and repeat