/*

  * 1 wire header

  *

  * This is the user servicable stuff - how to do delays and how to

  * frob the IO pins.

  *

  * $Id$

  *

  * Copyright (c) 2004

  *      Daniel O'Connor <darius@dons.net.au>.  All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions

  * are met:

  * 1. Redistributions of source code must retain the above copyright

  *    notice, this list of conditions and the following disclaimer.

  * 2. Redistributions in binary form must reproduce the above copyright

  *    notice, this list of conditions and the following disclaimer in the

  *    documentation and/or other materials provided with the distribution.

  *

  * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND

  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

  * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE

  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

  * SUCH DAMAGE.

  */

 /*

  * Alter these for your configuration

  */

 /* Set DDR on the right pins */

 #define OWBUSINIT()		do {			\

 	                            DDRD |= _BV(4);	\

 				    DDRD &= ~_BV(3);	\

                                 } while (0)

 /* Read the 1-wire bus, non-inverting logic */

 #define OWREADBUS()		(PIND & _BV(3) ? 1 : 0)

 /* Set the 1-wire bus to 0

  * Turns a transistor on to pull it low

  */

 #define OWSETBUSLOW()		PORTD |= _BV(4)

 /* Set the 1-wire bus to 1

  * Turn the transistor off to let the pullup do its job

  */

 #define OWSETBUSHIGH()		PORTD &= ~_BV(4)

 /* Turn Vpp on (ie put +12V on the bus

  * This is optional, if it is undefined OWProgROM always fails */

 #define OWSETVPPON()		PORTD |= _BV(5)

 #define OWSETVPPOFF()		PORTD &= ~_BV(5)

 /* _delay_us can only do a delay of 768/clock_freq */

 #if F_CPU > 16000000

 #error F_CPU > 16MHz, delays need adjusting

 #endif

 #define OWDELAY_A _delay_us(6)						/* 6 usec */

 #define OWDELAY_B do { _delay_us(48); _delay_us(16); } while (0)	/* 64 usec */

 #define OWDELAY_C do { _delay_us(48); _delay_us(12); } while (0)	/* 60 usec */

 #define OWDELAY_D _delay_us(10)						/* 10 usec */

 #define OWDELAY_E _delay_us(9)						/* 9 usec */

 #define OWDELAY_F do { _delay_us(55); } while (0)			/* 55 usec */

 #define OWDELAY_G							/* 0 usec */

 #define OWDELAY_H do { _delay_us(48); _delay_us(48);  _delay_us(48); 	\

 	_delay_us(48);	_delay_us(48);  _delay_us(48);  _delay_us(48);  \

 	_delay_us(48);_delay_us(48);  _delay_us(48); } while (0)	/* 480 usec */

 #define OWDELAY_I do { _delay_us(48); _delay_us(22); } while (0)	/* 70 usec */

 #ifdef OW_DEBUG

 #define OWPUTS(x)		puts_P(x)

 #define OWPUTSP(x)		puts_P(x)

 #define OWPRINTFP(fmt, ...)	printf_P(fmt, ## __VA_ARGS__)

 #else

 #define OWPUTS(x)

 #define OWPUTSP(x)

 #define OWPRINTFP(fmt, ...)

 #endif