[AVR] Buttons function

/*
 * keyboard.h
 *
 *  Created on: 7 maj 2014
 *      Author: miszczo
 */

#ifndef KEYBOARD_H_
#define KEYBOARD_H_




#define KEYBOARD_PORT D
#define KP_UP 0
#define KP_DOWN 1
#define KP_LEFT 2
#define KP_RIGHT 3
#define KP_OK 4
#define KP_ESC 5




// Makra upraszczające dostęp do portów
// *** PORT
#define PORT(x) SPORT(x)
#define SPORT(x) (PORT##x)
// *** PIN
#define PIN(x) SPIN(x)
#define SPIN(x) (PIN##x)
// *** DDR
#define DDR(x) SDDR(x)
#define SDDR(x) (DDR##x)





void keyboard_init(void);
void keyboard_get(uint8_t *kp_up ,uint8_t *kp_down, uint8_t *kp_right ,uint8_t *kp_left ,uint8_t *kp_ok ,uint8_t *kp_esc);



#endif /* KEYBOARD_H_ */







/*
 * keyboard.c
 *
 *  Created on: 7 maj 2014
 *      Author: miszczo
 */


#include <avr/io.h>
#include <util/delay.h>
#include "keyboard.h"




void keyboard_init(void){
    DDR(KEYBOARD_PORT) &= ~((1<<KP_DOWN)|(1<<KP_UP)|(1<<KP_LEFT)|(1<<KP_RIGHT)|(1<<KP_OK)|(1<<KP_ESC));
    PORT(KEYBOARD_PORT) |= ((1<<KP_DOWN)|(1<<KP_UP)|(1<<KP_LEFT)|(1<<KP_RIGHT)|(1<<KP_OK)|(1<<KP_ESC));
}

void keyboard_get(uint8_t *kp_up ,uint8_t *kp_down, uint8_t *kp_right ,uint8_t *kp_left ,uint8_t *kp_ok ,uint8_t *kp_esc)
{
    if(~(PIN(KEYBOARD_PORT)&((1<<KP_DOWN)|(1<<KP_UP)|(1<<KP_LEFT)|(1<<KP_RIGHT)|(1<<KP_OK)|(1<<KP_ESC)))){
        _delay_ms(20);
        if(~(PIN(KEYBOARD_PORT)&((1<<KP_DOWN)|(1<<KP_UP)|(1<<KP_LEFT)|(1<<KP_RIGHT)|(1<<KP_OK)|(1<<KP_ESC))))
        {
            *kp_up = !PIN(KEYBOARD_PORT&(1<<KP_UP));
            *kp_down = !PIN(KEYBOARD_PORT&(1<<KP_DOWN));
            *kp_left = !PIN(KEYBOARD_PORT&(1<<KP_LEFT));
            *kp_right = !PIN(KEYBOARD_PORT&(1<<KP_RIGHT));
            *kp_ok = !PIN(KEYBOARD_PORT&(1<<KP_OK));
            *kp_esc = !PIN(KEYBOARD_PORT&(1<<KP_ESC));
            while(((~PIN(KEYBOARD_PORT)&((1<<KP_DOWN)|(1<<KP_UP)|(1<<KP_LEFT)|(1<<KP_RIGHT)|(1<<KP_OK)|(1<<KP_ESC)))));
        }
    }
}
//1010 0000