SPI.h

/*

    Copyright (c) 2007 Stefan Engelke <mbox@stefanengelke.de>

    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.

    $Id$

*/

#ifndef _SPI_H_

#define _SPI_H_

#include <avr/io.h>

extern void spi_init();

extern void spi_transfer_sync (uint8_t * dataout, uint8_t * datain, uint8_t len);

extern void spi_transmit_sync (uint8_t * dataout, uint8_t len);

extern uint8_t spi_fast_shift (uint8_t data);

#endif /* _SPI_H_ */