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James FosterianfixesElizabeth Ventura
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Add support for EEPROM (#3)
* Introduce EEPROM support (#166) * Update CHANGELOG.md * Only include EEPROM if board supports it. * Add EEPROM_SIZE to mega boards. * Move `EEPROM_SIZE` macro to `misc/default.yml`. * Use E2END to calculate EEPROM_SIZE. * EEPROM is tested by uno and due so we don't need to add mega2560 (one less file changed). * Simplify reference to EEPROM library. * adding tests for EEPROM * test high memory and array read. * add setup to reset memory before each test * Add documentation of EEPROM (fix #190). Co-authored-by: Ian <[email protected]> Co-authored-by: Elizabeth Ventura <[email protected]>
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Diff for: ‎CHANGELOG.md

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@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
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## [Unreleased]
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### Added
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- Add `__AVR__` to defines when compiling
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- Support for mock EEPROM (but only if board supports it)
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### Changed
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- Move repository from https://github.com/ianfixes/arduino_ci to https://github.com/Arduino-CI/arduino_ci

Diff for: ‎REFERENCE.md

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@@ -581,3 +581,40 @@ unittest(spi) {
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assertEqual("LMNOe", String(inBuf));
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}
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```
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### EEPROM
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`EEPROM` is a global with a simple API to read and write bytes to persistent memory (like a tiny hard disk) given an `int` location. Since the Arduino core already provides this as a global, and the core API is sufficient for basic testing (read/write), there is no direct tie to the `GODMODE` API. (If you need more, such as a log of intermediate values, enter a feature request.)
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```C++
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unittest(eeprom)
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{
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uint8_t a;
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// size
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assertEqual(EEPROM_SIZE, EEPROM.length());
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// initial values
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a = EEPROM.read(0);
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assertEqual(255, a);
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// write and read
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EEPROM.write(0, 24);
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a = EEPROM.read(0);
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assertEqual(24, a);
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// update
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EEPROM.write(1, 14);
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EEPROM.update(1, 22);
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a = EEPROM.read(1);
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assertEqual(22, a);
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// put and get
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const float f1 = 0.025f;
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float f2 = 0.0f;
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EEPROM.put(5, f1);
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assertEqual(0.0f, f2);
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EEPROM.get(5, f2);
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assertEqual(0.025f, f2);
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// array access
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int val = 10;
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EEPROM[2] = val;
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a = EEPROM[2];
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assertEqual(10, a);
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}
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```

Diff for: ‎SampleProjects/TestSomething/test/eeprom.cpp

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#include <ArduinoUnitTests.h>
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#include <Arduino.h>
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// Only run EEPROM tests if there is hardware support!
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#if defined(EEPROM_SIZE) || (defined(E2END) && E2END)
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#include <EEPROM.h>
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GodmodeState* state = GODMODE();
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unittest_setup()
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{
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state->reset();
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}
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unittest(length)
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{
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assertEqual(EEPROM_SIZE, EEPROM.length());
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}
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unittest(firstRead)
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{
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uint8_t a = EEPROM.read(0);
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assertEqual(255, a);
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}
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unittest(writeRead)
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{
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EEPROM.write(0, 24);
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uint8_t a = EEPROM.read(0);
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assertEqual(24, a);
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EEPROM.write(0, 128);
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a = EEPROM.read(0);
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assertEqual(128, a);
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EEPROM.write(0, 256);
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a = EEPROM.read(0);
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assertEqual(0, a);
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int addr = EEPROM_SIZE / 2;
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EEPROM.write(addr, 63);
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a = EEPROM.read(addr);
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assertEqual(63, a);
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addr = EEPROM_SIZE - 1;
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EEPROM.write(addr, 188);
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a = EEPROM.read(addr);
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assertEqual(188, a);
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}
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unittest(updateWrite)
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{
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EEPROM.write(1, 14);
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EEPROM.update(1, 22);
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uint8_t a = EEPROM.read(1);
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assertEqual(22, a);
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}
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unittest(putGet)
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{
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const float f1 = 0.025f;
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float f2 = 0.0f;
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EEPROM.put(5, f1);
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assertEqual(0.0f, f2);
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EEPROM.get(5, f2);
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assertEqual(0.025f, f2);
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}
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unittest(array)
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{
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int val = 10;
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EEPROM[2] = val;
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uint8_t a = EEPROM[2];
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assertEqual(10, a);
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}
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#endif
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unittest_main()

Diff for: ‎cpp/arduino/EEPROM.h

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/*
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EEPROM.h - EEPROM library
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Original Copyright (c) 2006 David A. Mellis. All right reserved.
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New version by Christopher Andrews 2015.
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Copy of https://github.com/arduino/ArduinoCore-megaavr/blob/c8a1dd996c783777ec46167cfd8ad3fd2e6df185/libraries/EEPROM/src/EEPROM.h
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modified by James Foster in 2020 to work with Arduino CI.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef EEPROM_h
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#define EEPROM_h
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#include <inttypes.h>
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#include <avr/io.h>
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// different EEPROM implementations have different macros that leak out
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#if !defined(EEPROM_SIZE) && defined(E2END) && (E2END)
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#define EEPROM_SIZE (E2END + 1)
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#endif
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// Does the current board have EEPROM?
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#ifndef EEPROM_SIZE
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// In lieu of an "EEPROM.h not found" error for unsupported boards
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#error "EEPROM library not available for your board"
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#endif
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// On a real device this would be in hardware, but we have a mock board!
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static uint8_t eeprom[EEPROM_SIZE];
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inline uint8_t eeprom_read_byte( uint8_t* index ) { return eeprom[(unsigned long) index % EEPROM_SIZE]; }
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inline void eeprom_write_byte( uint8_t* index, uint8_t value ) { eeprom[(unsigned long) index % EEPROM_SIZE] = value; }
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// Everything following is from the original (referenced above)
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/***
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EERef class.
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This object references an EEPROM cell.
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Its purpose is to mimic a typical byte of RAM, however its storage is the EEPROM.
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This class has an overhead of two bytes, similar to storing a pointer to an EEPROM cell.
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***/
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struct EERef{
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EERef( const int index )
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: index( index ) {}
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//Access/read members.
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uint8_t operator*() const { return eeprom_read_byte( (uint8_t*) index ); }
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operator uint8_t() const { return **this; }
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//Assignment/write members.
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EERef &operator=( const EERef &ref ) { return *this = *ref; }
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EERef &operator=( uint8_t in ) { return eeprom_write_byte( (uint8_t*) index, in ), *this; }
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EERef &operator +=( uint8_t in ) { return *this = **this + in; }
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EERef &operator -=( uint8_t in ) { return *this = **this - in; }
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EERef &operator *=( uint8_t in ) { return *this = **this * in; }
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EERef &operator /=( uint8_t in ) { return *this = **this / in; }
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EERef &operator ^=( uint8_t in ) { return *this = **this ^ in; }
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EERef &operator %=( uint8_t in ) { return *this = **this % in; }
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EERef &operator &=( uint8_t in ) { return *this = **this & in; }
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EERef &operator |=( uint8_t in ) { return *this = **this | in; }
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EERef &operator <<=( uint8_t in ) { return *this = **this << in; }
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EERef &operator >>=( uint8_t in ) { return *this = **this >> in; }
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EERef &update( uint8_t in ) { return in != *this ? *this = in : *this; }
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/** Prefix increment/decrement **/
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EERef& operator++() { return *this += 1; }
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EERef& operator--() { return *this -= 1; }
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/** Postfix increment/decrement **/
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uint8_t operator++ (int){
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uint8_t ret = **this;
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return ++(*this), ret;
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}
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uint8_t operator-- (int){
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uint8_t ret = **this;
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return --(*this), ret;
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}
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int index; //Index of current EEPROM cell.
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};
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/***
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EEPtr class.
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This object is a bidirectional pointer to EEPROM cells represented by EERef objects.
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Just like a normal pointer type, this can be dereferenced and repositioned using
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increment/decrement operators.
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***/
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struct EEPtr{
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EEPtr( const int index )
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: index( index ) {}
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operator int() const { return index; }
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EEPtr &operator=( int in ) { return index = in, *this; }
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//Iterator functionality.
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bool operator!=( const EEPtr &ptr ) { return index != ptr.index; }
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EERef operator*() { return index; }
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/** Prefix & Postfix increment/decrement **/
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EEPtr& operator++() { return ++index, *this; }
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EEPtr& operator--() { return --index, *this; }
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EEPtr operator++ (int) { return index++; }
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EEPtr operator-- (int) { return index--; }
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int index; //Index of current EEPROM cell.
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};
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/***
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EEPROMClass class.
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This object represents the entire EEPROM space.
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It wraps the functionality of EEPtr and EERef into a basic interface.
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This class is also 100% backwards compatible with earlier Arduino core releases.
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***/
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struct EEPROMClass{
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//Basic user access methods.
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EERef operator[]( const int idx ) { return idx; }
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uint8_t read( int idx ) { return EERef( idx ); }
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void write( int idx, uint8_t val ) { (EERef( idx )) = val; }
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void update( int idx, uint8_t val ) { EERef( idx ).update( val ); }
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//STL and C++11 iteration capability.
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EEPtr begin() { return 0x00; }
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EEPtr end() { return length(); } //Standards requires this to be the item after the last valid entry. The returned pointer is invalid.
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uint16_t length() { return EEPROM_SIZE; }
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//Functionality to 'get' and 'put' objects to and from EEPROM.
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template< typename T > T &get( int idx, T &t ){
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EEPtr e = idx;
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uint8_t *ptr = (uint8_t*) &t;
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for( int count = sizeof(T) ; count ; --count, ++e ) *ptr++ = *e;
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return t;
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}
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template< typename T > const T &put( int idx, const T &t ){
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EEPtr e = idx;
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const uint8_t *ptr = (const uint8_t*) &t;
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for( int count = sizeof(T) ; count ; --count, ++e ) (*e).update( *ptr++ );
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return t;
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}
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};
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static EEPROMClass EEPROM;
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#endif

Diff for: ‎cpp/arduino/Godmode.h

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#include <avr/io.h>
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#include "WString.h"
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#include "PinHistory.h"
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#include "EEPROM.h"
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// random
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void randomSeed(unsigned long seed);
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spi.readDelayMicros = 0;
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}
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void resetEEPROM() {
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for(int i = 0; i < EEPROM.length(); ++i){
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EEPROM.update(i, 255);
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}
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}
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void reset() {
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resetClock();
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resetPins();
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resetInterrupts();
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resetPorts();
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resetSPI();
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resetEEPROM();
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seed = 1;
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}
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