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Add 1wire code. 1wire.c, 1wire.h and 1wire-config.h are copied avr-lib.
author Daniel O'Connor <darius@dons.net.au>
date Wed, 08 Feb 2012 10:37:22 +1030
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12:093bc0c3b1cc 13:96c345d304af
1 /*
2 * Example configuration header for 1-wire bus code.
3 *
4 * This is the user servicable stuff - how to do delays and how to
5 * frob the IO pins.
6 *
7 * Copyright (c) 2009
8 * Daniel O'Connor <darius@dons.net.au>. All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 /*
33 * The configuration described here has the 1-wire IO on GPIOE3,
34 * with no pull down, nor VPP
35 */
36
37 #include "stm32f10x.h" /* GPIO* */
38 #include "hw.h" /* For _usleep16() */
39
40 /* Fudge AVR stuff for ARM */
41 #define PROGMEM
42 #define PSTR(x) x
43 #define pgm_read_byte(x) *(x)
44
45 /* Init bus */
46 #define OWBUSINIT()
47
48 /* Set the port up to allow reading from the 1 wire bus */
49 #define OWSETREAD() do { \
50 GPIO_InitTypeDef GPIO_InitStructure; \
51 \
52 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; \
53 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; \
54 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; \
55 GPIO_Init(GPIOE, &GPIO_InitStructure); \
56 } while (0)
57
58
59 /* Read the 1-wire bus, non-inverting logic */
60 #define OWREADBUS() (GPIO_ReadInputDataBit(GPIOE, GPIO_Pin_3) ? 1 : 0)
61
62 /* Set the 1-wire bus to 0
63 */
64 #define OWSETBUSLOW() do { \
65 GPIO_InitTypeDef GPIO_InitStructure; \
66 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; \
67 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; \
68 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; \
69 GPIO_Init(GPIOE, &GPIO_InitStructure); \
70 GPIO_ResetBits(GPIOE, GPIO_Pin_3); \
71 } while (0)
72
73 /* Set the 1-wire bus to 1
74 * Change to input and let the pull up do its job
75 */
76 #define OWSETBUSHIGH() do { \
77 GPIO_InitTypeDef GPIO_InitStructure; \
78 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; \
79 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; \
80 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; \
81 GPIO_Init(GPIOE, &GPIO_InitStructure); \
82 } while (0)
83
84 #define OWDELAY_A _usleep16(6) /* 6 usec */
85 #define OWDELAY_B _usleep16(64) /* 64 usec */
86 #define OWDELAY_C _usleep16(60) /* 60 usec */
87 #define OWDELAY_D _usleep16(10) /* 10 usec */
88 #define OWDELAY_E _usleep16(9) /* 9 usec */
89 #define OWDELAY_F _usleep16(55) /* 55 usec */
90 #define OWDELAY_G /* 0 usec */
91 #define OWDELAY_H _usleep16(480) /* 480 usec */
92 #define OWDELAY_I _usleep16(70) /* 70 usec */
93 #define OWDELAY_J _usleep16(410) /* 410 usec */
94
95 #ifdef OW_DEBUG
96 #define OWPUTS(x) puts(x)
97 #define OWPUTSP(x) puts(x)
98 #define OWPRINTFP(fmt, ...) printf(fmt, ## __VA_ARGS__)
99 #else
100 #define OWPUTS(x)
101 #define OWPUTSP(x)
102 #define OWPRINTFP(fmt, ...)
103 #endif