Implementation of 1-Wire with added Alarm Search Functionality
Dependents: Max32630_One_Wire_Interface
Diff: OneWire_Masters/OneWireMastersShared.cpp
- Revision:
- 5:ce108eeb878d
diff -r ca27db159b10 -r ce108eeb878d OneWire_Masters/OneWireMastersShared.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/OneWire_Masters/OneWireMastersShared.cpp Tue Feb 09 03:30:22 2016 +0000 @@ -0,0 +1,71 @@ +/******************************************************************//** +* @file OneWireMastersShared.cpp +* +* @author Justin Jordan +* +* @version 0.0.0 +* +* Started: 08FEB16 +* +* Updated: +* +* @brief Source file for functions shared between masters, that should +* be implemented by each master, only one implementation +*********************************************************************** +* Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved. +* +* Permission is hereby granted, free of charge, to any person obtaining a +* copy of this software and associated documentation files (the "Software"), +* to deal in the Software without restriction, including without limitation +* the rights to use, copy, modify, merge, publish, distribute, sublicense, +* and/or sell copies of the Software, and to permit persons to whom the +* Software is furnished to do so, subject to the following conditions: +* +* The above copyright notice and this permission notice shall be included +* in all copies or substantial portions of the Software. +* +* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES +* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, +* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR +* OTHER DEALINGS IN THE SOFTWARE. +* +* Except as contained in this notice, the name of Maxim Integrated +* Products, Inc. shall not be used except as stated in the Maxim Integrated +* Products, Inc. Branding Policy. +* +* The mere transfer of this software does not imply any licenses +* of trade secrets, proprietary technology, copyrights, patents, +* trademarks, maskwork rights, or any other form of intellectual +* property whatsoever. Maxim Integrated Products, Inc. retains all +* ownership rights. +**********************************************************************/ + + +#include "OneWireMastersShared.h" + + +//********************************************************************* +uint8_t OWCalc_crc8(uint8_t data, uint8_t crc8) +{ + unsigned char i; + + // See Application Note 27 + crc8 = crc8 ^ data; + for (i = 0; i < 8; ++i) + { + if (crc8 & 1) + { + crc8 = (crc8 >> 1) ^ 0x8c; + } + else + { + crc8 = (crc8 >> 1); + } + } + + return crc8; +} +