OULOUTECH / Mbed 2 deprecated Main_V3

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Dependencies:   mbed

Fork of Main_V3_Old by EI2I_4_projet_1_2017-2018

OneWireCRC.h@9:e79b746421b1, 2018-01-15 (annotated)

Committer:
Aureb29
Date:
Mon Jan 15 11:22:40 2018 +0000
Revision:
9:e79b746421b1
Parent:
4:784c4b53a3d4 
Main V3

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ChrisnieM 4:784c4b53a3d4 1 /*
ChrisnieM 4:784c4b53a3d4 2 * OneWireCRC. This is a port to mbed of Jim Studt's Adruino One Wire
ChrisnieM 4:784c4b53a3d4 3 * library. Please see additional copyrights below this one, including
ChrisnieM 4:784c4b53a3d4 4 * references to other copyrights.
ChrisnieM 4:784c4b53a3d4 5 *
ChrisnieM 4:784c4b53a3d4 6 * Copyright (C) <2009> Petras Saduikis <petras@petras.co.uk>
ChrisnieM 4:784c4b53a3d4 7 *
ChrisnieM 4:784c4b53a3d4 8 * This file is part of OneWireCRC.
ChrisnieM 4:784c4b53a3d4 9 *
ChrisnieM 4:784c4b53a3d4 10 * OneWireCRC is free software: you can redistribute it and/or modify
ChrisnieM 4:784c4b53a3d4 11 * it under the terms of the GNU General Public License as published by
ChrisnieM 4:784c4b53a3d4 12 * the Free Software Foundation, either version 3 of the License, or
ChrisnieM 4:784c4b53a3d4 13 * (at your option) any later version.
ChrisnieM 4:784c4b53a3d4 14 *
ChrisnieM 4:784c4b53a3d4 15 * OneWireCRC is distributed in the hope that it will be useful,
ChrisnieM 4:784c4b53a3d4 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
ChrisnieM 4:784c4b53a3d4 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
ChrisnieM 4:784c4b53a3d4 18 * GNU General Public License for more details.
ChrisnieM 4:784c4b53a3d4 19 *
ChrisnieM 4:784c4b53a3d4 20 * You should have received a copy of the GNU General Public License
ChrisnieM 4:784c4b53a3d4 21 * along with OneWireCRC. If not, see <http://www.gnu.org/licenses/>.
ChrisnieM 4:784c4b53a3d4 22 */
ChrisnieM 4:784c4b53a3d4 23 /*
ChrisnieM 4:784c4b53a3d4 24 Copyright (c) 2007, Jim Studt
ChrisnieM 4:784c4b53a3d4 25
ChrisnieM 4:784c4b53a3d4 26 Updated to work with arduino-0008 and to include skip() as of
ChrisnieM 4:784c4b53a3d4 27 2007/07/06. --RJL20
ChrisnieM 4:784c4b53a3d4 28
ChrisnieM 4:784c4b53a3d4 29 Modified to calculate the 8-bit CRC directly, avoiding the need for
ChrisnieM 4:784c4b53a3d4 30 the 256-byte lookup table to be loaded in RAM. Tested in arduino-0010
ChrisnieM 4:784c4b53a3d4 31 -- Tom Pollard, Jan 23, 2008
ChrisnieM 4:784c4b53a3d4 32
ChrisnieM 4:784c4b53a3d4 33 Permission is hereby granted, free of charge, to any person obtaining
ChrisnieM 4:784c4b53a3d4 34 a copy of this software and associated documentation files (the
ChrisnieM 4:784c4b53a3d4 35 "Software"), to deal in the Software without restriction, including
ChrisnieM 4:784c4b53a3d4 36 without limitation the rights to use, copy, modify, merge, publish,
ChrisnieM 4:784c4b53a3d4 37 distribute, sublicense, and/or sell copies of the Software, and to
ChrisnieM 4:784c4b53a3d4 38 permit persons to whom the Software is furnished to do so, subject to
ChrisnieM 4:784c4b53a3d4 39 the following conditions:
ChrisnieM 4:784c4b53a3d4 40
ChrisnieM 4:784c4b53a3d4 41 The above copyright notice and this permission notice shall be
ChrisnieM 4:784c4b53a3d4 42 included in all copies or substantial portions of the Software.
ChrisnieM 4:784c4b53a3d4 43
ChrisnieM 4:784c4b53a3d4 44 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
ChrisnieM 4:784c4b53a3d4 45 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
ChrisnieM 4:784c4b53a3d4 46 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
ChrisnieM 4:784c4b53a3d4 47 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
ChrisnieM 4:784c4b53a3d4 48 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
ChrisnieM 4:784c4b53a3d4 49 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
ChrisnieM 4:784c4b53a3d4 50 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
ChrisnieM 4:784c4b53a3d4 51
ChrisnieM 4:784c4b53a3d4 52 Much of the code was inspired by Derek Yerger's code, though I don't
ChrisnieM 4:784c4b53a3d4 53 think much of that remains. In any event that was..
ChrisnieM 4:784c4b53a3d4 54 (copyleft) 2006 by Derek Yerger - Free to distribute freely.
ChrisnieM 4:784c4b53a3d4 55
ChrisnieM 4:784c4b53a3d4 56 The CRC code was excerpted and inspired by the Dallas Semiconductor
ChrisnieM 4:784c4b53a3d4 57 sample code bearing this copyright.
ChrisnieM 4:784c4b53a3d4 58 */
ChrisnieM 4:784c4b53a3d4 59 //---------------------------------------------------------------------------
ChrisnieM 4:784c4b53a3d4 60 // Copyright (C) 2000 Dallas Semiconductor Corporation, All Rights Reserved.
ChrisnieM 4:784c4b53a3d4 61 //
ChrisnieM 4:784c4b53a3d4 62 // Permission is hereby granted, free of charge, to any person obtaining a
ChrisnieM 4:784c4b53a3d4 63 // copy of this software and associated documentation files (the "Software"),
ChrisnieM 4:784c4b53a3d4 64 // to deal in the Software without restriction, including without limitation
ChrisnieM 4:784c4b53a3d4 65 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
ChrisnieM 4:784c4b53a3d4 66 // and/or sell copies of the Software, and to permit persons to whom the
ChrisnieM 4:784c4b53a3d4 67 // Software is furnished to do so, subject to the following conditions:
ChrisnieM 4:784c4b53a3d4 68 //
ChrisnieM 4:784c4b53a3d4 69 // The above copyright notice and this permission notice shall be included
ChrisnieM 4:784c4b53a3d4 70 // in all copies or substantial portions of the Software.
ChrisnieM 4:784c4b53a3d4 71 //
ChrisnieM 4:784c4b53a3d4 72 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
ChrisnieM 4:784c4b53a3d4 73 // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
ChrisnieM 4:784c4b53a3d4 74 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
ChrisnieM 4:784c4b53a3d4 75 // IN NO EVENT SHALL DALLAS SEMICONDUCTOR BE LIABLE FOR ANY CLAIM, DAMAGES
ChrisnieM 4:784c4b53a3d4 76 // OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ChrisnieM 4:784c4b53a3d4 77 // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
ChrisnieM 4:784c4b53a3d4 78 // OTHER DEALINGS IN THE SOFTWARE.
ChrisnieM 4:784c4b53a3d4 79 //
ChrisnieM 4:784c4b53a3d4 80 // Except as contained in this notice, the name of Dallas Semiconductor
ChrisnieM 4:784c4b53a3d4 81 // shall not be used except as stated in the Dallas Semiconductor
ChrisnieM 4:784c4b53a3d4 82 // Branding Policy.
ChrisnieM 4:784c4b53a3d4 83 //--------------------------------------------------------------------------
ChrisnieM 4:784c4b53a3d4 84
ChrisnieM 4:784c4b53a3d4 85 #ifndef SNATCH59_ONEWIRECRC_H
ChrisnieM 4:784c4b53a3d4 86 #define SNATCH59_ONEWIRECRC_H
ChrisnieM 4:784c4b53a3d4 87
ChrisnieM 4:784c4b53a3d4 88 #include <mbed.h>
ChrisnieM 4:784c4b53a3d4 89
ChrisnieM 4:784c4b53a3d4 90 // Select the table-lookup method of computing the 8-bit CRC by setting this to 1
ChrisnieM 4:784c4b53a3d4 91 #ifndef ONEWIRE_CRC8_TABLE
ChrisnieM 4:784c4b53a3d4 92 #define ONEWIRE_CRC8_TABLE 1
ChrisnieM 4:784c4b53a3d4 93 #endif
ChrisnieM 4:784c4b53a3d4 94
ChrisnieM 4:784c4b53a3d4 95 typedef unsigned char BYTE; // used to be uint8_t : something a byte wide, whatever ....
ChrisnieM 4:784c4b53a3d4 96
ChrisnieM 4:784c4b53a3d4 97 enum eSpeed {OVERDRIVE, STANDARD};
ChrisnieM 4:784c4b53a3d4 98
ChrisnieM 4:784c4b53a3d4 99 class OneWireCRC
ChrisnieM 4:784c4b53a3d4 100 {
ChrisnieM 4:784c4b53a3d4 101 public:
ChrisnieM 4:784c4b53a3d4 102 OneWireCRC(PinName oneWire, eSpeed);
ChrisnieM 4:784c4b53a3d4 103
ChrisnieM 4:784c4b53a3d4 104 // reset, read, write functions
ChrisnieM 4:784c4b53a3d4 105 int reset();
ChrisnieM 4:784c4b53a3d4 106 void writeByte(int data);
ChrisnieM 4:784c4b53a3d4 107 int readByte();
ChrisnieM 4:784c4b53a3d4 108 int touchByte(int data);
ChrisnieM 4:784c4b53a3d4 109 void block(BYTE* data, int data_len);
ChrisnieM 4:784c4b53a3d4 110 int overdriveSkip(BYTE* data, int data_len);
ChrisnieM 4:784c4b53a3d4 111
ChrisnieM 4:784c4b53a3d4 112 // address functions
ChrisnieM 4:784c4b53a3d4 113 void matchROM(BYTE rom[8]);
ChrisnieM 4:784c4b53a3d4 114 void skipROM();
ChrisnieM 4:784c4b53a3d4 115
ChrisnieM 4:784c4b53a3d4 116 // address search functions
ChrisnieM 4:784c4b53a3d4 117 void resetSearch();
ChrisnieM 4:784c4b53a3d4 118 BYTE search(BYTE* newAddr);
ChrisnieM 4:784c4b53a3d4 119
ChrisnieM 4:784c4b53a3d4 120 // CRC check functions
ChrisnieM 4:784c4b53a3d4 121 static BYTE crc8(BYTE* addr, BYTE len);
ChrisnieM 4:784c4b53a3d4 122 static unsigned short crc16(unsigned short* data, unsigned short len);
ChrisnieM 4:784c4b53a3d4 123
ChrisnieM 4:784c4b53a3d4 124 private:
ChrisnieM 4:784c4b53a3d4 125 const int* timing;
ChrisnieM 4:784c4b53a3d4 126
ChrisnieM 4:784c4b53a3d4 127 BYTE address[8];
ChrisnieM 4:784c4b53a3d4 128 int searchJunction; // so we can set to it -1 somewhere
ChrisnieM 4:784c4b53a3d4 129 bool searchExhausted;
ChrisnieM 4:784c4b53a3d4 130
ChrisnieM 4:784c4b53a3d4 131 DigitalInOut oneWirePort;
ChrisnieM 4:784c4b53a3d4 132
ChrisnieM 4:784c4b53a3d4 133 // read/write bit functions
ChrisnieM 4:784c4b53a3d4 134 void writeBit(int bit);
ChrisnieM 4:784c4b53a3d4 135 int readBit();
ChrisnieM 4:784c4b53a3d4 136 };
ChrisnieM 4:784c4b53a3d4 137
ChrisnieM 4:784c4b53a3d4 138 #endif