#ifndef RUSH_HEADER_H
#define RUSH_HEADER_H

#include <avr/io.h>
#include <util/delay.h>
#include <util/twi.h>
#include <avr/interrupt.h>

#include "utils.h"
#include "bitmanip.h"
#include "timer.h"
#include "usart.h"
#include "interrupt.h"

// TWI
// table 22-7 : prescale sets
#define TWI_PRESCALE_VALUE				1							// can be 1, 4, 16, 64
#define TWI_PRESCALE_SET(value)  \
										((value) == 1  ? (0<<TWPS1 | 0<<TWPS0) : \
										 (value) == 4  ? (0<<TWPS1 | 1<<TWPS0) : \
										 (value) == 16 ? (1<<TWPS1 | 0<<TWPS0) : \
										 (value) == 64 ? (1<<TWPS1 | 1<<TWPS0) : 0x00)
// 100kHz I2C
#define TWI_FREQ						100000UL
// Slave address
#define SLAVE_ADDRESS					42							// 22.3.3 : address 0000000 and 1111xxx are reservedm 42 is 0101010
// 22.7.1 : TWCR, Master Transmitter Mode
#define SEND_START_CONDITION			((1<<TWINT) | (1<<TWEN)) | (1<<TWSTA)
#define SEND_CONTINUE_TRANSMISSION		((1<<TWINT) | (1<<TWEN))
#define SEND_STOP_CONDITION				((1<<TWINT) | (1<<TWEN)) | (1<<TWSTO)
#define SEND_ACKNOWLEDGE				((1<<TWINT) | (1<<TWEN)  | (1<<TWEA))
#define SEND_NACKNOWLEDGE				((1<<TWINT) | (1<<TWEN))

#define MASK_WITHOUT_LAST_3				0xF8						// 11111000

// FUNCTION PROTOTYPES
// main.c
void flash_led();
void blink_led_2();
void turn_on_led(int bit);
void turn_on_led_1_light();
void turn_on_led_2_light();
void turn_off_led(int bit);
// twi.c
void twi_init_slave(void);
void twi_stop_slave(void);
void twi_init_master();
void twi_start();
void twi_send_addr(uint8_t addr_w);
void write_one_byte_data(uint8_t data);
uint8_t read_one_byte_data();
void twi_write(uint8_t data);
uint8_t twi_read(uint8_t ack);
void twi_stop();
// interupts.c
void setup_button_interrupt();
void setup_button_role();
// roles.c
void get_role();
// game.c
void launch_game();

// GLOBAL VARIABLES
typedef enum {
	WAITING,
    MASTER,
    SLAVE
} Role;
extern volatile Role role;
extern volatile uint8_t received_data;

#endif // RUSH_HEADER_H