spi.h

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/*
 * Author: Thomas Ingleby <thomas.c.ingleby@intel.com>
 * Copyright (c) 2014 Intel Corporation.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#pragma once

#ifdef __cplusplus
extern "C" {
#endif

#include <stdio.h>
#include <fcntl.h>
#include <stdint.h>

#include "common.h"

typedef enum {
    MRAA_SPI_MODE0 = 0, 
    MRAA_SPI_MODE1 = 1, 
    MRAA_SPI_MODE2 = 2, 
    MRAA_SPI_MODE3 = 3, 
} mraa_spi_mode_t;

typedef struct _spi* mraa_spi_context;

mraa_spi_context mraa_spi_init(int bus);

mraa_spi_context mraa_spi_init_raw(unsigned int bus, unsigned int cs);

mraa_result_t mraa_spi_mode(mraa_spi_context dev, mraa_spi_mode_t mode);

mraa_result_t mraa_spi_frequency(mraa_spi_context dev, int hz);

int mraa_spi_write(mraa_spi_context dev, uint8_t data);

int mraa_spi_write_word(mraa_spi_context dev, uint16_t data);

uint8_t* mraa_spi_write_buf(mraa_spi_context dev, uint8_t* data, int length);

uint16_t* mraa_spi_write_buf_word(mraa_spi_context dev, uint16_t* data, int length);

mraa_result_t mraa_spi_transfer_buf(mraa_spi_context dev, uint8_t* data, uint8_t* rxbuf, int length);

mraa_result_t mraa_spi_transfer_buf_word(mraa_spi_context dev, uint16_t* data, uint16_t* rxbuf, int length);

mraa_result_t mraa_spi_lsbmode(mraa_spi_context dev, mraa_boolean_t lsb);

mraa_result_t mraa_spi_bit_per_word(mraa_spi_context dev, unsigned int bits);

mraa_result_t mraa_spi_stop(mraa_spi_context dev);

#ifdef __cplusplus
}
#endif