mirror of https://github.com/stella-emu/stella.git
118 lines
3.4 KiB
C++
118 lines
3.4 KiB
C++
//============================================================================
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//
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// SSSS tt lll lll
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// SS SS tt ll ll
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// SS tttttt eeee ll ll aaaa
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// SSSS tt ee ee ll ll aa
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// SS tt eeeeee ll ll aaaaa -- "An Atari 2600 VCS Emulator"
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// SS SS tt ee ll ll aa aa
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// SSSS ttt eeeee llll llll aaaaa
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//
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// Copyright (c) 1995-2020 by Bradford W. Mott, Stephen Anthony
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// and the Stella Team
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//
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// See the file "License.txt" for information on usage and redistribution of
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// this file, and for a DISCLAIMER OF ALL WARRANTIES.
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//============================================================================
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#include "MT24LC256.hxx"
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#include "OSystem.hxx"
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#include "System.hxx"
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#include "SaveKey.hxx"
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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SaveKey::SaveKey(Jack jack, const Event& event, const System& system,
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const string& eepromfile, const onMessageCallback& callback,
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Type type)
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: Controller(jack, event, system, type),
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myEEPROM(make_unique<MT24LC256>(eepromfile, system, callback))
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{
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setPin(DigitalPin::One, true);
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setPin(DigitalPin::Two, true);
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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SaveKey::SaveKey(Jack jack, const Event& event, const System& system,
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const string& eepromfile, const onMessageCallback& callback)
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: SaveKey(jack, event, system, eepromfile, callback, Controller::Type::SaveKey)
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{
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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SaveKey::~SaveKey()
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{
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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bool SaveKey::read(DigitalPin pin)
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{
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// We need to override the Controller::read() method, since the timing
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// of the actual read is important for the EEPROM (we can't just read
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// 60 times per second in the ::update() method)
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switch(pin)
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{
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// Pin 3: EEPROM SDA
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// input data from the 24LC256 EEPROM using the I2C protocol
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case DigitalPin::Three:
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return setPin(pin, myEEPROM->readSDA());
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default:
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return Controller::read(pin);
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}
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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void SaveKey::write(DigitalPin pin, bool value)
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{
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// Change the pin state based on value
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switch(pin)
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{
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// Pin 3: EEPROM SDA
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// output data to the 24LC256 EEPROM using the I2C protocol
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case DigitalPin::Three:
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setPin(pin, value);
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myEEPROM->writeSDA(value);
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break;
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// Pin 4: EEPROM SCL
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// output clock data to the 24LC256 EEPROM using the I2C protocol
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case DigitalPin::Four:
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setPin(pin, value);
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myEEPROM->writeSCL(value);
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break;
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default:
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break;
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}
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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void SaveKey::reset()
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{
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myEEPROM->systemReset();
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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void SaveKey::close()
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{
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myEEPROM.reset();
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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void SaveKey::eraseAll()
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{
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myEEPROM->eraseAll();
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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void SaveKey::eraseCurrent()
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{
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myEEPROM->eraseCurrent();
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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bool SaveKey::isPageUsed(const uInt32 page) const
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{
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return myEEPROM->isPageUsed(page);
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}
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