sam_spi/spi_master.h

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/*
 * Support and FAQ: visit <a href="https://www.microchip.com/support/">Microchip Support</a>
 */

#ifndef _SPI_MASTER_H_
#define _SPI_MASTER_H_

#include "compiler.h"
#include "sysclk.h"
#include "status_codes.h"
#include "spi.h"

#include "conf_spi_master.h"


#ifdef __cplusplus
extern "C" {
#endif


#ifndef CONFIG_SPI_MASTER_DELAY_BCS
#define CONFIG_SPI_MASTER_DELAY_BCS          0
#endif

#ifndef CONFIG_SPI_MASTER_BITS_PER_TRANSFER
#define CONFIG_SPI_MASTER_BITS_PER_TRANSFER  SPI_CSR_BITS_8_BIT
#endif

#ifndef CONFIG_SPI_MASTER_DELAY_BCT
#define CONFIG_SPI_MASTER_DELAY_BCT          0
#endif

#ifndef CONFIG_SPI_MASTER_DELAY_BS
#define CONFIG_SPI_MASTER_DELAY_BS           0
#endif

#ifndef CONFIG_SPI_MASTER_DUMMY
#define CONFIG_SPI_MASTER_DUMMY              0xFF
#endif

#define SPI_CPHA  (1 << 0)

#define SPI_CPOL  (1 << 1)

#define SPI_MODE_0  0

#define SPI_MODE_1  (SPI_CPHA)

#define SPI_MODE_2  (SPI_CPOL)

#define SPI_MODE_3  (SPI_CPOL | SPI_CPHA)

#ifndef SPI_TYPE_DEFS
#define SPI_TYPE_DEFS
typedef uint8_t spi_flags_t;

typedef uint32_t board_spi_select_id_t;
#endif

struct spi_device {
        board_spi_select_id_t id;
};

extern void spi_master_init(Spi *p_spi);

extern void spi_master_setup_device(Spi *p_spi, struct spi_device *device,
                spi_flags_t flags, uint32_t baud_rate, board_spi_select_id_t sel_id);

extern void spi_select_device(Spi *p_spi, struct spi_device *device);

extern void spi_deselect_device(Spi *p_spi, struct spi_device *device);


static inline void spi_write_single(Spi *p_spi, uint8_t data)
{
        spi_put(p_spi, (uint16_t)data);
}

extern status_code_t spi_write_packet(Spi *p_spi,
                const uint8_t *data, size_t len);

static inline void spi_read_single(Spi *p_spi, uint8_t *data)
{
        *data = (uint8_t)spi_get(p_spi);
}

extern status_code_t spi_read_packet(Spi *p_spi, uint8_t *data, size_t len);

extern status_code_t spi_transceive_packet(Spi *p_spi, uint8_t *tx_data, uint8_t *rx_data, size_t len);


#ifdef __cplusplus
}
#endif


#endif // _SPI_MASTER_H_