avr_ioport.h

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/*
 * avr_ioport.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_IOPORT_H__
#define __AVR_IOPORT_H__

#ifdef __cplusplus
extern "C"
{
#endif

#include "sim_avr.h"

  enum
  {
    IOPORT_IRQ_PIN0 = 0, IOPORT_IRQ_PIN1, IOPORT_IRQ_PIN2, IOPORT_IRQ_PIN3,
    IOPORT_IRQ_PIN4, IOPORT_IRQ_PIN5, IOPORT_IRQ_PIN6, IOPORT_IRQ_PIN7,
    IOPORT_IRQ_PIN_ALL,
    IOPORT_IRQ_DIRECTION_ALL,
    IOPORT_IRQ_REG_PORT,
    IOPORT_IRQ_REG_PIN,
    IOPORT_IRQ_COUNT
  };

#define AVR_IOPORT_OUTPUT 0x100

#define AVR_IOCTL_IOPORT_GETIRQ(_name) AVR_IOCTL_DEF('i','o','g',(_name))

  typedef struct avr_ioport_getirq_t
  {
    avr_regbit_t bit;    
    avr_irq_t *irq[8];    
  } avr_ioport_getirq_t;

#define AVR_IOCTL_IOPORT_GETIRQ_REGBIT AVR_IOCTL_DEF('i','o','g','r')

  typedef struct avr_ioport_state_t
  {
    unsigned long name:7, port:8, ddr:8, pin:8;
  } avr_ioport_state_t;

#define AVR_IOCTL_IOPORT_GETSTATE(_name) AVR_IOCTL_DEF('i','o','s',(_name))

  typedef struct avr_ioport_external_t
  {
    unsigned long name:7, mask:8, value:8;
  } avr_ioport_external_t;

#define AVR_IOCTL_IOPORT_SET_EXTERNAL(_name) AVR_IOCTL_DEF('i','o','p',(_name))

  typedef struct avr_iopin_t
  {
    uint16_t port:8;    
    uint16_t pin:8;    
  } avr_iopin_t;
#define AVR_IOPIN(_port, _pin) { .port = _port, .pin = _pin }

  typedef struct avr_ioport_t
  {
    avr_io_t io;
    char name;
    avr_io_addr_t r_port;
    avr_io_addr_t r_ddr;
    avr_io_addr_t r_pin;

    avr_int_vector_t pcint;    
    avr_io_addr_t r_pcint;    

    struct
    {
      uint8_t pull_mask, pull_value;
    } external;
  } avr_ioport_t;

  void avr_ioport_init (avr_t * avr, avr_ioport_t * port);

#define AVR_IOPORT_DECLARE(_lname, _cname, _uname) \
 .port ## _lname = { \
  .name = _cname, .r_port = PORT ## _uname, .r_ddr = DDR ## _uname, .r_pin = PIN ## _uname, \
 }

#ifdef __cplusplus
};
#endif

#endif /* __AVR_IOPORT_H__ */