/*
 * buttons.c - button api
 *
 * author: hackbard@hackdaworld.org
 *
 */

#include "buttons.h"
#include "serial.h"

#define BUTTON_RESET \
	IOSET2=((1<<18)|(1<<19)|(1<<20)|(1<<21)|(1<<22)|(1<<23)|(1<<24))

#define BUTTON_UNSET \
	IOCLR2=((1<<18)|(1<<19)|(1<<20)|(1<<21)|(1<<22)|(1<<23)|(1<<24))

void button_init(t_button *button)
{
        u32 *addr;
        u32 *cntl;

        addr=(u32 *)&VICVectAddr0;
        cntl=(u32 *)&VICVectCntl0;

        PINSEL0 = 0x00008005;
        PINSEL1 = 0x20000000;
        PINSEL2 = 0x0de049d4;
        IODIR2  = ((1<<18)|(1<<19)|(1<<20)|(1<<21)|(1<<22)|(1<<23)|(1<<24));
        IOSET2  = ((1<<18)|(1<<19)|(1<<20)|(1<<21)|(1<<22)|(1<<23)|(1<<24));
}

u8 button_poll_event ()
{
	u32 port0,port3;

        IOSET2 = ((1<<18)|(1<<19)|(1<<20)|(1<<21)|(1<<22)|(1<<23)|(1<<24));
        IOCLR2 =  (1<<18);

        port0 = IOPIN0;
        port3 = IOPIN3;

        if (!(port0 & (1 << 28))) return 1;
        if (!(port0 & (1 << 27))) return 2;
        if (!(port0 & (1 << 22))) return 3;
        if (!(port3 & (1 << 13))) return 4;
        if (!(port3 & (1 << 21))) return 5;
        if (!(port3 & (1 << 20))) return 6;

        IOSET2 = ((1<<18)|(1<<19)|(1<<20)|(1<<21)|(1<<22)|(1<<23)|(1<<24));

	return 0;
}