#ifndef QMSK_SPI_H
#define QMSK_SPI_H

#include "stdlib.h"
#include "port.h"

static ioport_t *const SPI_DDR = &DDRB;
static ioport_t *const SPI_PORT = &PORTB;

static const byte SPI_SCK   = PORTB5;
static const byte SPI_MISO  = PORTB4;
static const byte SPI_MOSI  = PORTB3;
static const byte SPI_SS    = PORTB2;

enum spi_dord {
    SPI_DORD_MSB        = 0b0,

    SPI_DORD            = SPI_DORD_MSB
};

enum spi_cpol {
    SPI_CPOL_0 = 0b0,
    SPI_CPOL_1 = 0b1,

    SPI_CPOL   = SPI_CPOL_1 // mode 3
};

enum spi_cpha {
    SPI_CPHA_0  = 0b0,
    SPI_CPHA_1  = 0b1,

    SPI_CPHA   = SPI_CPHA_1 // mode 3
};

enum spi_clock {
    SPI_CLOCK_4         = 0b000,
    SPI_CLOCK_16        = 0b001,
    SPI_CLOCK_64        = 0b010,
    SPI_CLOCK_128       = 0b011,

    SPI_CLOCK           = SPI_CLOCK_16
};

#define SPI_COUNT 2

/*
 * Initialize in SPI master mode.
 */
void spi_init ();

/*
 * Write out value, and return read value.
 */
byte spi_readwrite (byte value);

/*
 * Perform an SPI bus update.
 */
void spi_update ();

void spi_set (byte index, byte value);

byte spi_get (byte index);

#endif