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#ifndef QMSK_SPI_H

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#define QMSK_SPI_H

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#include "stdlib.h"

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#include "port.h"

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static ioport_t *const SPI_DDR = &DDRB;

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static ioport_t *const SPI_PORT = &PORTB;

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static const byte SPI_SCK   = PORTB5;

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static const byte SPI_MISO  = PORTB4;

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static const byte SPI_MOSI  = PORTB3;

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static const byte SPI_SS    = PORTB2;

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enum spi_dord {

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    SPI_DORD_MSB        = 0b0,

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    SPI_DORD            = SPI_DORD_MSB

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};

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enum spi_cpol {

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    SPI_CPOL_0 = 0b0,

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    SPI_CPOL_1 = 0b1,

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    SPI_CPOL   = SPI_CPOL_1 // mode 3

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};

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enum spi_cpha {

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    SPI_CPHA_0  = 0b0,

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    SPI_CPHA_1  = 0b1,

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    SPI_CPHA   = SPI_CPHA_1 // mode 3

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};

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enum spi_clock {

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    SPI_CLOCK_4         = 0b000,

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    SPI_CLOCK_16        = 0b001,

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    SPI_CLOCK_64        = 0b010,

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    SPI_CLOCK_128       = 0b011,

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    SPI_CLOCK           = SPI_CLOCK_16

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};

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#define SPI_COUNT 2

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/*

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 * Initialize in SPI master mode.

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 */

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void spi_init ();

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/*

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 * Write out value, and return read value.

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 */

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byte spi_readwrite (byte value);

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/*

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 * Perform an SPI bus update.

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 */

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void spi_update ();

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void spi_set (byte index, byte value);

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byte spi_get (byte index);

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#endif