/**
 * @file spi.h
 * Class declaration for SPI helper files
 */

/**
 * Example of spi.h class declaration for SPI portability
 *
 * @defgroup Porting_SPI Porting: SPI
 *
 * @{
 */
#include <string>
#include <stdint.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <inttypes.h>
#include <linux/types.h>
#include <linux/spi/spidev.h>

using namespace std;

// class SPI {
public:

	/**
	 * SPI constructor
	 */
	SPI();

	/**
	 * Start SPI
	 */
	void begin(int busNo);

	/**
	 * Transfer a single byte
	 * @param tx_ Byte to send
	 * @return Data returned via spi
	 */
	uint8_t transfer(uint8_t tx_);

	/**
	 * Transfer a buffer of data
	 * @param tbuf Transmit buffer
	 * @param rbuf Receive buffer
	 * @param len Length of the data
	 */
	void transfernb(char* tbuf, char* rbuf, uint32_t len);

	/**
	 * Transfer a buffer of data without an rx buffer
	 * @param buf Pointer to a buffer of data
	 * @param len Length of the data
	 */
	void transfern(char* buf, uint32_t len);

	virtual ~ SPI();

private:

	/** Default SPI device */
	string device;
	/** SPI Mode set */
	uint8_t mode;
	/** word size*/
	uint8_t bits;
	/** Set SPI speed*/
	uint32_t speed;
	int fd;

	void init();

};

/**@}*/