uhd

/* -*- c++ -*- */

/*

 * Copyright 2004 Free Software Foundation, Inc.

 * 

 * This file is part of GNU Radio

 * 

 * GNU Radio is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 3, or (at your option)

 * any later version.

 * 

 * GNU Radio is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 * 

 * You should have received a copy of the GNU General Public License

 * along with GNU Radio; see the file COPYING.  If not, write to

 * the Free Software Foundation, Inc., 51 Franklin Street,

 * Boston, MA 02110-1301, USA.

 */

#ifndef INCLUDED_SPI_H

#define INCLUDED_SPI_H

#include "usrp_spi_defs.h"

void init_spi (void);                // one time call to init

// returns non-zero if successful, else 0

unsigned char

spi_read (unsigned char header_hi, unsigned char header_lo,

          unsigned char enables, unsigned char format,

          xdata unsigned char *buf, unsigned char len);

// returns non-zero if successful, else 0

unsigned char

spi_write (unsigned char header_hi, unsigned char header_lo,

           unsigned char enables, unsigned char format,

           const xdata unsigned char *buf, unsigned char len);

// returns non-zero if successful, else 0

unsigned char

spi_transact (unsigned char data0, unsigned char data1,

              unsigned char data2, unsigned char data3,

              unsigned char enables, xdata unsigned char *buf,

              unsigned char len);

#endif /* INCLUDED_SPI_H */