| User | Revision | Line number | New contents of line |
|---|
| gbeardall |
0:2f78e3dca55d
|
1
|
/*
|
| gbeardall |
0:2f78e3dca55d
|
2
|
* OneWireCRC. This is a port to mbed of Jim Studt's Adruino One Wire
|
| gbeardall |
0:2f78e3dca55d
|
3
|
* library. Please see additional copyrights below this one, including
|
| gbeardall |
0:2f78e3dca55d
|
4
|
* references to other copyrights.
|
| gbeardall |
0:2f78e3dca55d
|
5
|
*
|
| gbeardall |
0:2f78e3dca55d
|
6
|
* Copyright (C) <2009> Petras Saduikis <petras@petras.co.uk>
|
| gbeardall |
0:2f78e3dca55d
|
7
|
*
|
| gbeardall |
0:2f78e3dca55d
|
8
|
* This file is part of OneWireCRC.
|
| gbeardall |
0:2f78e3dca55d
|
9
|
*
|
| gbeardall |
0:2f78e3dca55d
|
10
|
* OneWireCRC is free software: you can redistribute it and/or modify
|
| gbeardall |
0:2f78e3dca55d
|
11
|
* it under the terms of the GNU General Public License as published by
|
| gbeardall |
0:2f78e3dca55d
|
12
|
* the Free Software Foundation, either version 3 of the License, or
|
| gbeardall |
0:2f78e3dca55d
|
13
|
* (at your option) any later version.
|
| gbeardall |
0:2f78e3dca55d
|
14
|
*
|
| gbeardall |
0:2f78e3dca55d
|
15
|
* OneWireCRC is distributed in the hope that it will be useful,
|
| gbeardall |
0:2f78e3dca55d
|
16
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| gbeardall |
0:2f78e3dca55d
|
17
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
| gbeardall |
0:2f78e3dca55d
|
18
|
* GNU General Public License for more details.
|
| gbeardall |
0:2f78e3dca55d
|
19
|
*
|
| gbeardall |
0:2f78e3dca55d
|
20
|
* You should have received a copy of the GNU General Public License
|
| gbeardall |
0:2f78e3dca55d
|
21
|
* along with OneWireCRC. If not, see <http://www.gnu.org/licenses/>.
|
| gbeardall |
0:2f78e3dca55d
|
22
|
*/
|
| gbeardall |
0:2f78e3dca55d
|
23
|
/*
|
| gbeardall |
0:2f78e3dca55d
|
24
|
Copyright (c) 2007, Jim Studt
|
| gbeardall |
0:2f78e3dca55d
|
25
|
|
| gbeardall |
0:2f78e3dca55d
|
26
|
Updated to work with arduino-0008 and to include skip() as of
|
| gbeardall |
0:2f78e3dca55d
|
27
|
2007/07/06. --RJL20
|
| gbeardall |
0:2f78e3dca55d
|
28
|
|
| gbeardall |
0:2f78e3dca55d
|
29
|
Modified to calculate the 8-bit CRC directly, avoiding the need for
|
| gbeardall |
0:2f78e3dca55d
|
30
|
the 256-byte lookup table to be loaded in RAM. Tested in arduino-0010
|
| gbeardall |
0:2f78e3dca55d
|
31
|
-- Tom Pollard, Jan 23, 2008
|
| gbeardall |
0:2f78e3dca55d
|
32
|
|
| gbeardall |
0:2f78e3dca55d
|
33
|
Permission is hereby granted, free of charge, to any person obtaining
|
| gbeardall |
0:2f78e3dca55d
|
34
|
a copy of this software and associated documentation files (the
|
| gbeardall |
0:2f78e3dca55d
|
35
|
"Software"), to deal in the Software without restriction, including
|
| gbeardall |
0:2f78e3dca55d
|
36
|
without limitation the rights to use, copy, modify, merge, publish,
|
| gbeardall |
0:2f78e3dca55d
|
37
|
distribute, sublicense, and/or sell copies of the Software, and to
|
| gbeardall |
0:2f78e3dca55d
|
38
|
permit persons to whom the Software is furnished to do so, subject to
|
| gbeardall |
0:2f78e3dca55d
|
39
|
the following conditions:
|
| gbeardall |
0:2f78e3dca55d
|
40
|
|
| gbeardall |
0:2f78e3dca55d
|
41
|
The above copyright notice and this permission notice shall be
|
| gbeardall |
0:2f78e3dca55d
|
42
|
included in all copies or substantial portions of the Software.
|
| gbeardall |
0:2f78e3dca55d
|
43
|
|
| gbeardall |
0:2f78e3dca55d
|
44
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
| gbeardall |
0:2f78e3dca55d
|
45
|
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
| gbeardall |
0:2f78e3dca55d
|
46
|
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
| gbeardall |
0:2f78e3dca55d
|
47
|
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
| gbeardall |
0:2f78e3dca55d
|
48
|
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
| gbeardall |
0:2f78e3dca55d
|
49
|
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
| gbeardall |
0:2f78e3dca55d
|
50
|
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
| gbeardall |
0:2f78e3dca55d
|
51
|
|
| gbeardall |
0:2f78e3dca55d
|
52
|
Much of the code was inspired by Derek Yerger's code, though I don't
|
| gbeardall |
0:2f78e3dca55d
|
53
|
think much of that remains. In any event that was..
|
| gbeardall |
0:2f78e3dca55d
|
54
|
(copyleft) 2006 by Derek Yerger - Free to distribute freely.
|
| gbeardall |
0:2f78e3dca55d
|
55
|
|
| gbeardall |
0:2f78e3dca55d
|
56
|
The CRC code was excerpted and inspired by the Dallas Semiconductor
|
| gbeardall |
0:2f78e3dca55d
|
57
|
sample code bearing this copyright.
|
| gbeardall |
0:2f78e3dca55d
|
58
|
*/
|
| gbeardall |
0:2f78e3dca55d
|
59
|
//---------------------------------------------------------------------------
|
| gbeardall |
0:2f78e3dca55d
|
60
|
// Copyright (C) 2000 Dallas Semiconductor Corporation, All Rights Reserved.
|
| gbeardall |
0:2f78e3dca55d
|
61
|
//
|
| gbeardall |
0:2f78e3dca55d
|
62
|
// Permission is hereby granted, free of charge, to any person obtaining a
|
| gbeardall |
0:2f78e3dca55d
|
63
|
// copy of this software and associated documentation files (the "Software"),
|
| gbeardall |
0:2f78e3dca55d
|
64
|
// to deal in the Software without restriction, including without limitation
|
| gbeardall |
0:2f78e3dca55d
|
65
|
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
| gbeardall |
0:2f78e3dca55d
|
66
|
// and/or sell copies of the Software, and to permit persons to whom the
|
| gbeardall |
0:2f78e3dca55d
|
67
|
// Software is furnished to do so, subject to the following conditions:
|
| gbeardall |
0:2f78e3dca55d
|
68
|
//
|
| gbeardall |
0:2f78e3dca55d
|
69
|
// The above copyright notice and this permission notice shall be included
|
| gbeardall |
0:2f78e3dca55d
|
70
|
// in all copies or substantial portions of the Software.
|
| gbeardall |
0:2f78e3dca55d
|
71
|
//
|
| gbeardall |
0:2f78e3dca55d
|
72
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
| gbeardall |
0:2f78e3dca55d
|
73
|
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
| gbeardall |
0:2f78e3dca55d
|
74
|
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
| gbeardall |
0:2f78e3dca55d
|
75
|
// IN NO EVENT SHALL DALLAS SEMICONDUCTOR BE LIABLE FOR ANY CLAIM, DAMAGES
|
| gbeardall |
0:2f78e3dca55d
|
76
|
// OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
| gbeardall |
0:2f78e3dca55d
|
77
|
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
| gbeardall |
0:2f78e3dca55d
|
78
|
// OTHER DEALINGS IN THE SOFTWARE.
|
| gbeardall |
0:2f78e3dca55d
|
79
|
//
|
| gbeardall |
0:2f78e3dca55d
|
80
|
// Except as contained in this notice, the name of Dallas Semiconductor
|
| gbeardall |
0:2f78e3dca55d
|
81
|
// shall not be used except as stated in the Dallas Semiconductor
|
| gbeardall |
0:2f78e3dca55d
|
82
|
// Branding Policy.
|
| gbeardall |
0:2f78e3dca55d
|
83
|
//--------------------------------------------------------------------------
|
| gbeardall |
0:2f78e3dca55d
|
84
|
|
| gbeardall |
0:2f78e3dca55d
|
85
|
#ifndef SNATCH59_ONEWIRECRC_H
|
| gbeardall |
0:2f78e3dca55d
|
86
|
#define SNATCH59_ONEWIRECRC_H
|
| gbeardall |
0:2f78e3dca55d
|
87
|
|
| gbeardall |
0:2f78e3dca55d
|
88
|
#include <mbed.h>
|
| gbeardall |
0:2f78e3dca55d
|
89
|
|
| gbeardall |
0:2f78e3dca55d
|
90
|
// Select the table-lookup method of computing the 8-bit CRC by setting this to 1
|
| gbeardall |
0:2f78e3dca55d
|
91
|
#ifndef ONEWIRE_CRC8_TABLE
|
| gbeardall |
0:2f78e3dca55d
|
92
|
#define ONEWIRE_CRC8_TABLE 1
|
| gbeardall |
0:2f78e3dca55d
|
93
|
#endif
|
| gbeardall |
0:2f78e3dca55d
|
94
|
|
| gbeardall |
0:2f78e3dca55d
|
95
|
typedef unsigned char BYTE; // used to be uint8_t : something a byte wide, whatever ....
|
| gbeardall |
0:2f78e3dca55d
|
96
|
|
| gbeardall |
0:2f78e3dca55d
|
97
|
enum eSpeed {OVERDRIVE, STANDARD};
|
| gbeardall |
0:2f78e3dca55d
|
98
|
|
| gbeardall |
0:2f78e3dca55d
|
99
|
class OneWireCRC
|
| gbeardall |
0:2f78e3dca55d
|
100
|
{
|
| gbeardall |
0:2f78e3dca55d
|
101
|
public:
|
| gbeardall |
0:2f78e3dca55d
|
102
|
OneWireCRC(PinName oneWire, eSpeed);
|
| gbeardall |
0:2f78e3dca55d
|
103
|
|
| gbeardall |
0:2f78e3dca55d
|
104
|
// reset, read, write functions
|
| gbeardall |
0:2f78e3dca55d
|
105
|
int reset();
|
| gbeardall |
0:2f78e3dca55d
|
106
|
void writeByte(int data);
|
| gbeardall |
0:2f78e3dca55d
|
107
|
int readByte();
|
| gbeardall |
0:2f78e3dca55d
|
108
|
int touchByte(int data);
|
| gbeardall |
0:2f78e3dca55d
|
109
|
void block(BYTE* data, int data_len);
|
| gbeardall |
0:2f78e3dca55d
|
110
|
int overdriveSkip(BYTE* data, int data_len);
|
| gbeardall |
0:2f78e3dca55d
|
111
|
|
| gbeardall |
0:2f78e3dca55d
|
112
|
// address functions
|
| gbeardall |
0:2f78e3dca55d
|
113
|
void matchROM(BYTE rom[8]);
|
| gbeardall |
0:2f78e3dca55d
|
114
|
void skipROM();
|
| gbeardall |
0:2f78e3dca55d
|
115
|
|
| gbeardall |
0:2f78e3dca55d
|
116
|
// address search functions
|
| gbeardall |
0:2f78e3dca55d
|
117
|
void resetSearch();
|
| gbeardall |
0:2f78e3dca55d
|
118
|
BYTE search(BYTE* newAddr);
|
| gbeardall |
0:2f78e3dca55d
|
119
|
|
| gbeardall |
0:2f78e3dca55d
|
120
|
// CRC check functions
|
| gbeardall |
0:2f78e3dca55d
|
121
|
static BYTE crc8(BYTE* addr, BYTE len);
|
| gbeardall |
0:2f78e3dca55d
|
122
|
static unsigned short crc16(unsigned short* data, unsigned short len);
|
| gbeardall |
0:2f78e3dca55d
|
123
|
|
| gbeardall |
0:2f78e3dca55d
|
124
|
private:
|
| gbeardall |
0:2f78e3dca55d
|
125
|
const int* timing;
|
| gbeardall |
0:2f78e3dca55d
|
126
|
|
| gbeardall |
0:2f78e3dca55d
|
127
|
BYTE address[8];
|
| gbeardall |
0:2f78e3dca55d
|
128
|
int searchJunction; // so we can set to it -1 somewhere
|
| gbeardall |
0:2f78e3dca55d
|
129
|
bool searchExhausted;
|
| gbeardall |
0:2f78e3dca55d
|
130
|
|
| gbeardall |
0:2f78e3dca55d
|
131
|
DigitalInOut oneWirePort;
|
| gbeardall |
0:2f78e3dca55d
|
132
|
|
| gbeardall |
0:2f78e3dca55d
|
133
|
// read/write bit functions
|
| gbeardall |
0:2f78e3dca55d
|
134
|
void writeBit(int bit);
|
| gbeardall |
0:2f78e3dca55d
|
135
|
int readBit();
|
| gbeardall |
0:2f78e3dca55d
|
136
|
};
|
| gbeardall |
0:2f78e3dca55d
|
137
|
|
| gbeardall |
0:2f78e3dca55d
|
138
|
#endif
|
gavin beardall