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03264a797c
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.gitignore
vendored
34
.gitignore
vendored
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# ---> C++
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# Prerequisites
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*.d
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# Compiled Object files
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*.slo
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*.lo
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*.o
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*.obj
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# Precompiled Headers
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*.gch
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*.pch
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# Compiled Dynamic libraries
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*.so
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*.dylib
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*.dll
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# Fortran module files
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*.mod
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*.smod
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# Compiled Static libraries
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*.lai
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*.la
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*.a
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*.lib
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# Executables
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*.exe
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*.out
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*.app
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20
keywords.txt
20
keywords.txt
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#######################################
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# Syntax Coloring Map
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#######################################
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#######################################
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# Datatypes (KEYWORD1)
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#######################################
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#######################################
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# Methods and Functions (KEYWORD2)
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#######################################
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#######################################
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# Instances (KEYWORD2)
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#######################################
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#######################################
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# Constants (LITERAL1)
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#######################################
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22
library.json
22
library.json
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{
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"name":"encipheredEEPROMStrings",
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"description":"Store and retrieve EEPROM strings",
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"keywords":"eeprom,storage",
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"authors":
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{
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"name": "Pavel Brychta",
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"maintainer": true
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},
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"repository":
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{
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"type": "git",
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"url": "http://git.xpablo.cz/xPablo.cz/encipheredEEPROMStrings.git"
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},
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"version": "1.0",
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"license": "MIT",
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"frameworks": "arduino",
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"platforms": ["espressif8266","espressif32"],
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"build": {
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"libCompatMode": 2
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}
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}
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name=encipheredEEPROMStrings
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version=1.0
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author=Pavel Brychta
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maintainer=Pavel Brychta
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sentence=Store and retrieve EEPROM strings
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paragraph=Store and retrieve EEPROM strings
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category=Other
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url=http://git.xpablo.cz/xPablo.cz/encipheredEEPROMStrings
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architectures=esp8266,esp32
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#include "encipheredEEPROMStrings.h"
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#include <EEPROM.h>
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#if defined(ESP8266)
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extern "C" {
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#include "user_interface.h"
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}
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#define ESP_getChipId() (ESP.getChipId())
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#else
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#include <esp_wifi.h>
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#define ESP_getChipId() ((uint32_t)ESP.getEfuseMac())
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#endif
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String EES_readString(unsigned int start, size_t maxlen)
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{
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uint8_t key[4];
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unsigned int enciphidx = 0;
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String result;
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unsigned int top = EEPROM.read(start);
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unsigned int i;
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result.reserve(maxlen);
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uint32_t cid = ESP_getChipId();
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uint32_t *pkey = (uint32_t *)&key[0];
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*pkey = cid;
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if ((top > 0) && (top < (maxlen - 2)))
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{
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uint8_t b;
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for (i = start + 1; i < + start + top + 1; ++i)
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{
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b = EEPROM.read(i);
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b ^= key[enciphidx];
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++enciphidx;
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enciphidx %= sizeof(key);
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result.concat(char(b));
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}
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b = EEPROM.read(i) ^ key[enciphidx];
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if (b != 0)
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{
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result = F(""); // spatna ukoncovaci nula - neplatny retezec
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}
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}
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return result;
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}
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bool EES_storeString(unsigned int start, size_t maxlen, String &string)
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{
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uint8_t key[4];
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unsigned int enciphidx = 0;
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unsigned int si = 0;
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unsigned int top;
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char c;
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bool result = false; // retezec nebyl ulozeny cely (nevesel s do bufferu)
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unsigned int i;
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if (string.length() > maxlen - 2)
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top = maxlen - 2;
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else
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{
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result = true; // retezec se do urceneho mista vejde
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top = string.length();
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}
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uint32_t cid = ESP_getChipId();
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uint32_t *pkey = (uint32_t *)&key[0];
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*pkey = cid;
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EEPROM.write(start, (uint8_t)top); // ulozime delku retezce (pouzite pr kontrolu pri vycitani)
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for (i = start + 1; i < start + top + 1; ++i)
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{
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c = string[si];
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c ^= key[enciphidx];
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++enciphidx;
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enciphidx %= sizeof(key);
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EEPROM.write(i, c);
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++si;
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}
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c = 0 ^ key[enciphidx];
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EEPROM.write(i, c); // ukoncovaci a kontrolni nula
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return result;
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}
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@ -1,26 +0,0 @@
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/* Knihovna pro ukladani a cteni retezcu do/z EEPROM.
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* Retezce jsou ulozeny jednoduse sifrovane pomoci XOR sifry.
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* @author Pavel Brychta http://www.xpabo.cz
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*/
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#include <Arduino.h>
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/**
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* @brief Cteni sifrovanych retezcu z EEPROM
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*
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* @param[in] start Pocatecni adresa retezce v EEPROM
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* @param[in] maxlen Maximalni delka retezce
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*
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* @return Vycteny a desifrovany retezec
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*/
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String EES_readString(unsigned int start, size_t maxlen);
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/**
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* @brief Zapis retezcu do EEPROM
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*
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* @param[in] start Pocatecni adresa retezce v EEPROM
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* @param[in] maxlen Maximalni delka retezce
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* @param string Ukladany retezec
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*
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* @return Priznak, zda se zapis podaril
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*/
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bool EES_storeString(unsigned int start, size_t maxlen, String &string);
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