text: /*
  	avr_spi.h
  
  	Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
  
   	This file is part of simavr.
  
  	simavr 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 of the License, or
  	(at your option) any later version.
  
  	simavr 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 simavr.  If not, see <http://www.gnu.org/licenses/>.
   */
  
  #ifndef __AVR_SPI_H__
  #define __AVR_SPI_H__
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #include "sim_avr.h"
  
  enum {
  	SPI_IRQ_INPUT = 0,
  	SPI_IRQ_OUTPUT,
  	SPI_IRQ_COUNT
  };
  
  // add port number to get the real IRQ
  #define AVR_IOCTL_SPI_GETIRQ(_name) AVR_IOCTL_DEF('s','p','i',(_name))
  
  typedef struct avr_spi_t {
  	avr_io_t	io;
  	char name;
  	avr_regbit_t	disabled;	// bit in the PRR
  
  	avr_io_addr_t	r_spdr;			// data register
  	avr_io_addr_t	r_spcr;			// control register
  	avr_io_addr_t	r_spsr;			// status register
  	
  	avr_regbit_t spe;		// spi enable
  	avr_regbit_t mstr;		// master/slave
  	avr_regbit_t spr[4];	// clock divider
  	
  	avr_int_vector_t spi;	// spi interrupt
  
  	uint8_t		input_data_register;
  } avr_spi_t;
  
  void avr_spi_init(avr_t * avr, avr_spi_t * port);
  
  #ifdef __cplusplus
  };
  #endif
  
  #endif /*__AVR_SPI_H__*/
  