avr_bitbang.h

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/*
 * avr_bitbang.h
 * 
 * Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
 * 2011 Stephan Veigl <veig@gmx.net>
 * 
 * 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_BITBANG_H_
#define AVR_BITBANG_H_

#include "sim_avr.h"
#include "avr_ioport.h"

typedef struct avr_bitbang_t
{
  avr_t *avr;   

  uint8_t enabled;   
  uint8_t clk_generate;   
  uint8_t clk_pol;   
  uint8_t clk_phase;   
  uint32_t clk_cycles;   
  uint8_t data_order;   

  uint8_t buffer_size;   

  void *callback_param;   
  void (*callback_bit_read) (uint8_t bit, void *param);   
  void (*callback_bit_write) (uint8_t bit, void *param);   
  uint32_t (*callback_transfer_finished) (uint32_t data, void *param);   

  avr_iopin_t p_clk;   
  avr_iopin_t p_in;   
  avr_iopin_t p_out;   

  // private data
  uint32_t data;   
  int8_t clk_count;   
} avr_bitbang_t;

void avr_bitbang_reset (avr_t * avr, avr_bitbang_t * p);

void avr_bitbang_start (avr_bitbang_t * p);

void avr_bitbang_stop (avr_bitbang_t * p);

#endif /* AVR_BITBANG_H_ */