SW2

#include <stdio.h>
#include <io.h>
#include <system.h>
#include "alt_types.h"
#include "altera_avalon_pio_regs.h"
#include "sys/alt_irq.h"
#include "sys/alt_timestamp.h"
#include <unistd.h>
#include "definition.h"

#define  SW0 0x00000001
#define  SW1 0x00000002
#define  SW2 0x00000004
#define  SW3 0x00000008
#define  SW4 0x00000010
#define  SW5 0x00000020

#define  LEDG0 0x00000001
#define  LEDG1 0x00000002
#define  LEDG2 0x00000004
#define  LEDG3 0x00000008
#define  LEDG4 0x00000010
#define  LEDG5 0x00000020

#define  LEDR17 0x00020000

#define  SEGA 0b0000001
#define  SEGB 0b0000010
#define  SEGC 0b0000100
#define  SEGD 0b0001000
#define  SEGE 0b0010000
#define  SEGF 0b0100000
#define  SEGG 0b1000000

int HEX0 = SEGA|SEGB|SEGC|SEGD|SEGE|SEGF;
int HEX3 = SEGA|SEGB|SEGC|SEGD|SEGG;
int HEX4 = SEGF|SEGG|SEGB|SEGC;
int HEX5 = SEGA|SEGF|SEGG|SEGC|SEGD;
int HEX6 = SEGA|SEGF|SEGG|SEGC|SEGD|SEGE;
int HEX8 = SEGA|SEGB|SEGC|SEGD|SEGE|SEGF|SEGG;
int HEX9 = SEGA|SEGB|SEGC|SEGD|SEGF|SEGG;
int HEXE = SEGA|SEGF|SEGG|SEGE|SEGD;
int HEXr = SEGE|SEGG;

struct interrupt_data
{
    int * ledsr_addr;
    int * ledsg_addr;
    int * sliders_addr;
    int * hex3_addr;
};

static void handle_sliders_interrupt(struct interrupt_data * data)
{
    int switches = IORD(*data->sliders_addr,0);
    int state = switches & (SW0|SW1|SW2|SW3|SW4|SW5);
    IOWR(*data->ledsg_addr,0,0);
    IOWR(*data->ledsr_addr,0,0);
    IOWR(*data->hex3_addr,0,0);
    switch(state)
    {
    case 0:
        break;
    case 1:
        IOWR(*data->hex3_addr,0,((HEX3<<8)| HEX0));
        IOWR(*data->ledsg_addr,0,LEDG0);
        break;
    case 2:
        IOWR(*data->hex3_addr,0,((HEX3<<8)| HEX5));
        IOWR(*data->ledsg_addr,0,LEDG1);
        break;
    case 4:
        IOWR(*data->hex3_addr,0,((HEX4<<8)| HEX0));
        IOWR(*data->ledsg_addr,0,LEDG2);
        break;
    case 8:
        IOWR(*data->hex3_addr,0,((HEX6<<8)| HEX0));
        IOWR(*data->ledsg_addr,0,LEDG3);
        break;
    case 16:
        IOWR(*data->hex3_addr,0,((HEX8<<8)| HEX0));
        IOWR(*data->ledsg_addr,0,LEDG4);
        break;
    case 32:
        IOWR(*data->hex3_addr,0,((HEX9<<8)| HEX0));
        IOWR(*data->ledsg_addr,0,LEDG5);
        break;

    default:
        IOWR(*data->hex3_addr,0,((HEXE<<16) | (HEXr<<8) | HEXr));
        IOWR(*data->ledsg_addr,0,0);
        IOWR(*data->ledsr_addr,0,LEDR17);
        break;

    }
}
int main()
{

    int *ledsr = (int*) & LEDS_RED_BASE;
    int *ledsg = (int*) & LEDS_GREEN_BASE;
    int *sliders = (int*) & SW_SLIDERS_BASE;
    int *hex3 = (int*) & HEX_3_BASE;
    struct interrupt_data data;

    data.ledsr_addr = ledsr;
    data.ledsg_addr = ledsg;
    data.sliders_addr = sliders;
    data.hex3_addr = hex3;

    IOWR_ALTERA_AVALON_PIO_IRQ_MASK(SW_SLIDERS_BASE,0xF);

    alt_ic_isr_register(SW_SLIDERS_IRQ_INTERRUPT_CONTROLLER_ID, SW_SLIDERS_IRQ, handle_sliders_interrupt, &data, 0x0);

    alt_ic_irq_enable(SW_SLIDERS_IRQ_INTERRUPT_CONTROLLER_ID, SW_SLIDERS_IRQ);

    printf("Hello from Nios II!\n");

    while(1);

}