#include "keyboard.h"
#include "alt_types.h"
#include "sys/alt_irq.h"
#include "altera_avalon_pio_regs.h"
#include "system.h"
#include "gui.h"
#include <stdio.h>
#include "Player.h"

extern Player player;

void handle_keyboard_interrupts(void* context, alt_u32 id)
{
    unsigned char i;
    IOWR_ALTERA_AVALON_PIO_EDGE_CAP(KEYBOARD_PIO_0_BASE, 0);
    IOWR_ALTERA_AVALON_PIO_IRQ_MASK(KEYBOARD_PIO_0_BASE, 0xff);
    i = IORD_ALTERA_AVALON_PIO_DATA(KEYBOARD_PIO_0_BASE);
    keyboard_action(i);
}

void init_keyboard_pio()
{
    IOWR_ALTERA_AVALON_PIO_IRQ_MASK(KEYBOARD_PIO_0_BASE, 0xff);
    IOWR_ALTERA_AVALON_PIO_EDGE_CAP(KEYBOARD_PIO_0_BASE, 0x0);
    alt_irq_register( KEYBOARD_PIO_0_IRQ, NULL, handle_keyboard_interrupts );
}   

//Key_UP是鍵松開標識，Shift是Shift鍵按下標識
static unsigned char key_UP = 0;
 //注意:如SHIFT+G為12H 34H F0H 34H F0H 12H，也就是說shift的通碼+G的通碼+shift的斷碼+G的斷碼
void keyboard_action(unsigned char scanCode)
{
    //當鍵盤松開時
    if (!key_UP){
        if(scanCode == 0xf0){ // 當收到0xF0，key_UP置1表示斷碼開始
            key_UP = 1;
        }
    }
    else{   
        key_UP = 0;
        switch (scanCode){
            case KEY_UP:
                printf("UP\n");
                break;
            case KEY_DOWN:
                printf("DOWN\n");
                break;
            case KEY_LEFT:
                printf("LEFT\n");
                break;
            case KEY_RIGHT:
                printf("RIGHT\n");
                break;            
            case KEY_ENTER:
                printf("ENTER\n");
                break;                
            default:                        
                break;                
        }
    }
}