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/*
* Gearboy - Nintendo Game Boy Emulator
* Copyright (C) 2012 Ignacio Sanchez
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/
*
*/
#ifndef INPUT_H
#define INPUT_H
#include "definitions.h"
class Memory;
class Processor;
class Input
{
public:
Input(Memory* pMemory, Processor* pProcessor);
void Init();
void Reset();
void Tick(unsigned int clockCycles);
void KeyPressed(Gameboy_Keys key);
void KeyReleased(Gameboy_Keys key);
void Write(u8 value);
u8 Read();
void SaveState(std::ostream& stream);
void LoadState(std::istream& stream);
private:
void Update();
private:
Memory* m_pMemory;
Processor* m_pProcessor;
u8 m_JoypadState;
u8 m_P1;
int m_iInputCycles;
};
inline void Input::Tick(unsigned int clockCycles)
{
m_iInputCycles += clockCycles;
// Joypad Poll Speed (64 Hz)
if (m_iInputCycles >= 65536)
{
m_iInputCycles -= 65536;
Update();
}
}
inline void Input::Write(u8 value)
{
m_P1 = (m_P1 & 0xCF) | (value & 0x30);
Update();
}
inline u8 Input::Read()
{
return m_P1;
}
#endif /* INPUT_H */
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