1 files changed, 76 insertions, 0 deletions
diff --git a/gearboy/src/Input.h b/gearboy/src/Input.h
new file mode 100644
index 00000000..c15b2711
--- /dev/null
+++ b/gearboy/src/Input.h
@@ -0,0 +1,76 @@
+/*
+ * 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 */