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annotate 1wire-delay.h @ 30:48056516b3eb

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Make sure our outputs are pulled high.
author darius
date Mon, 10 Apr 2006 17:23:51 +0930
parents 8dc98a293e43
children
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1 /*
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2 * Delay routines for the 1 wire bus
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3 * Search routine is copied from the Dallas owpd library with mods.
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4 *
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5 * $Id$
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6 *
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7 * Copyright (c) 2004
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8 * Daniel O'Connor <darius@dons.net.au>. All rights reserved.
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9 *
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10 * Redistribution and use in source and binary forms, with or without
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11 * modification, are permitted provided that the following conditions
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12 * are met:
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13 * 1. Redistributions of source code must retain the above copyright
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14 * notice, this list of conditions and the following disclaimer.
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15 * 2. Redistributions in binary form must reproduce the above copyright
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16 * notice, this list of conditions and the following disclaimer in the
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17 * documentation and/or other materials provided with the distribution.
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18 *
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19 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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22 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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29 * SUCH DAMAGE.
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30 */
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31
19
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32 #define DELAY_A _delay_us(6) /* 6 usec */
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33 #define DELAY_B _delay_us(30); _delay_us(30); _delay_us(4) /* 64 usec */
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34 #define DELAY_C _delay_us(30); _delay_us(30) /* 60 usec */
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35 #define DELAY_D _delay_us(10) /* 10 usec */
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36 #define DELAY_E _delay_us(9) /* 9 usec */
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37 #define DELAY_F _delay_us(25); _delay_us(30); /* 55 usec */
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38 #define DELAY_G /* 0 usec */
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39 #define DELAY_H _delay_us(30); _delay_us(30); _delay_us(30); _delay_us(30); \
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40 _delay_us(30); _delay_us(30); _delay_us(30); _delay_us(30); \
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41 _delay_us(30); _delay_us(30); _delay_us(30); _delay_us(30); \
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42 _delay_us(30); _delay_us(30); _delay_us(30); _delay_us(30) /* 480 usec */
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43 #define DELAY_I _delay_us(30); _delay_us(30);_delay_us(10) /* 70 usec */