Colony

/**

 * Copyright (c) 2007 Colony Project

 * 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

 * 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

/**

 * @defgroup dio Digital Input / Output

 * @brief Controls digital input and output

 * A general note on how port / pin numbers work:<br>

 * The portpin is used to select both the bank and which pin is selected.

 * 6 bits are used (lower 6, ex: 0b00abcdef).

 * E = 101<br>

 * F = 110<br>

 * G = 111<br><br>

 * The bank can be found by doing portpin >> 3. <br>

 * The next three (def in this example) are used to select the pin number.

 * These three bits are just the binary representation of the pin number.<br>

 * <br>

/**

 * Reads the selected portpin.

 * @param portpin The portpin to be read. See the general description

 * for a description of portpins.

 *

int digital_input(int portpin){

  int pin = portpin & 0x7;

  int pin_val = 0;

  switch(portpin >> 3){

  case _PORT_A:

    DDRA &= ~_BV(pin);

    return (pin_val >> pin) & 1;

  default: break;

  }

  return -1;

}

    break;

  case _PORT_B:

    PORTB |= _BV(pins);

  case _PORT_C:

    PORTC |= _BV(pins);

  case _PORT_D:

    PORTD |= _BV(pins);

  case _PORT_E:

    PORTE |= _BV(pins);

  case _PORT_F:

    PORTF |= _BV(pins);

  case _PORT_G:

    PORTG |= _BV(pins);

    break;

/**

 * Sets portpin to the given value.

 * @param portpin the portpin to output to. See the general

 * description for a discussion of portpins.

 *

 **/

void digital_output(int portpin, int val) {

  int pins = portpin & 0x07;

  /* if you want to set to 0... */

  if(val == 0) {

    switch(portpin >> 3) {

    case _PORT_B:

      DDRB |= _BV(pins);

      PORTB &= (0XFF - _BV(pins));

    case _PORT_C:

      DDRC |= _BV(pins);

      PORTC &= (0XFF - _BV(pins));

    case _PORT_D:

      DDRD |= _BV(pins);

      PORTD &= (0XFF - _BV(pins));

    case _PORT_E:

      DDRE |= _BV(pins);

      PORTE &= (0XFF - _BV(pins));

    case _PORT_F:

      DDRF |= _BV(pins);

      PORTF &= (0XFF - _BV(pins));

    case _PORT_G:

      DDRG |= _BV(pins);

      PORTG &= (0XFF - _BV(pins));

      break;

    }

    switch(portpin >> 3) {

    case _PORT_A:

      DDRA |= _BV(pins);

    case _PORT_B:

      DDRB |= _BV(pins);

      PORTB |= _BV(pins);

    case _PORT_C:

      DDRC |= _BV(pins);

      PORTC |= _BV(pins);

    case _PORT_D:

      DDRD |= _BV(pins);

      PORTD |= _BV(pins);

    case _PORT_E:

      DDRE |= _BV(pins);

      PORTE |= _BV(pins);

    case _PORT_F:

      DDRF |= _BV(pins);

      PORTF |= _BV(pins);

    case _PORT_G:

      DDRG |= _BV(pins);

      PORTG |= _BV(pins);

/**

 * Checks if button1 is currently pressed.

 * @return 1 if button1 is pressed, 0 otherwise

 *

 * @see button1_wait, button1_click

	PORTG|= _BV(PING0);

    pin_val = PING;

	return !((pin_val & _BV(PING0)));

}

/**

/**

 * Checks if button2 is currently pressed.

 * @return 1 if button2 is pressed, 0 otherwise

 *

 * @see button2_wait, button2_click