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/*
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* OneWireEEPROM. Library for Maxim One-Wire EEPROM.
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*
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* see http://www.maxim-ic.com
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*
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* DS2433
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* DS28EC20
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*
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* Copyright (C) <2011> Wim De Roeve <wim312@gmail.com>
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*
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* Uses the OneWireCRC library. http://mbed.org/users/snatch59/programs/OneWireCRC/gpdz56
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*
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* OneWire EEPROM is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* OneWireEEPROM is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _OneWireEEPROM_H
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#define _OneWireEEPROM_H
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#include "OneWireCRC.h"
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// OneWire info
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#define ADDRESS_SIZE 8
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#define ADDRESS_CRC_BYTE 7
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// OneWire device-id
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#define DS2433EEPROM_ID 0x23
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#define DS28EC20EEPROM_ID 0x43
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// OneWireEEPROM related
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#define WRITESCRATCHPAD 0x0F
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#define READSCRATCHPAD 0xAA
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#define COPYSCRATCHPAD 0x55
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#define READMEMORY 0xF0
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#define PAGESIZE 0x20 // 32 bytes for each page
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#define DS2433PAGES 0x10 // 16 pages
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#define DS28EC20PAGES 0x50 // 80 pages
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/*
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DS2433 is a 4096 bit EEPROM
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4096 bits (512 bytes) in 16 pages of 256 bits (32 bytes)
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ADDRESS 32-BYTE intermediate storage scratchpad
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0x0000 to 0x001F 32 byte finale storage EEPROM PAGE 0
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0x0020 to 0x003F 32 byte finale storage EEPROM PAGE 1
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0x0040 to 0x01DF 32 byte finale storage EEPROM PAGE 2 to PAGE 14
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0x01E0 to 0x01FF 32 byte finale storage EEPROM PAGE 15
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DS28EC20 is a 20480-bit EEPROM
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20480 bits (2560 bytes) in 80 pages of 256 bits (32 bytes)
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ADDRESS 32-BYTE intermediate storage scratchpad
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0x0000 to 0x001F 32 byte finale storage EEPROM PAGE 0
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0x0020 to 0x003F 32 byte finale storage EEPROM PAGE 1
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0x0040 to 0x09DF 32 byte finale storage EEPROM PAGE 2 to PAGE 78
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0x09E0 to 0x09FF 32 byte finale storage EEPROM PAGE 79
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*/
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enum DSTYPE { DS2433 = 1, DS28EC20 = 2};
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class OneWireEEPROM {
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public:
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OneWireEEPROM(PinName pin, bool crcOn, bool useAddr, bool parasitic, DSTYPE ds);
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bool Initialize(uint8_t* ROMaddress);
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//
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bool WriteMemory(uint8_t* Source, uint16_t Address, uint8_t Size);
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//
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int ReadMemory(uint8_t* Destination, uint16_t Address, uint16_t Size);
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void ShowMemory(int PageFrom, int PageTo);
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bool active;
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BYTE ROMCode[8];
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protected:
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OneWireCRC oneWire;
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bool _useParasiticPower;
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bool _useCRC;
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bool _useAddress;
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int _memsize;
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int _pages;
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int _eeprom_id;
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void ResetAndAddress();
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};
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#endif |