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* SNESDev - User-space driver for the RetroPie GPIO Adapter for the Raspberry Pi.
* (c) Copyright 2012-2013 Florian Müller (
* SNESDev homepage:
* Permission to use, copy, modify and distribute SNESDev in both binary and
* source form, for non-commercial purposes, is hereby granted without fee,
* providing that this license information and copyright notice appear with
* all copies and any derived work.
* This software is provided 'as-is', without any express or implied
* warranty. In no event shall the authors be held liable for any damages
* arising from the use of this software.
* SNESDev is freeware for PERSONAL USE only. Commercial users should
* seek permission of the copyright holders first. Commercial use includes
* charging money for SNESDev or software derived from SNESDev.
* The copyright holders request that bug fixes and improvements to the code
* should be forwarded to them so everyone can benefit from the modifications
* in future versions.
* Raspberry Pi is a trademark of the Raspberry Pi Foundation.
#ifndef GAMEPAD_H_
#define GAMEPAD_H_
/* bit masks for checking the button states for SNES controllers */
#define GPAD_SNES_B 0x01
#define GPAD_SNES_Y 0x02
#define GPAD_SNES_SELECT 0x04
#define GPAD_SNES_START 0x08
#define GPAD_SNES_UP 0x10
#define GPAD_SNES_DOWN 0x20
#define GPAD_SNES_LEFT 0x40
#define GPAD_SNES_RIGHT 0x80
#define GPAD_SNES_A 0x100
#define GPAD_SNES_X 0x200
#define GPAD_SNES_L 0x400
#define GPAD_SNES_R 0x800
/* bit masks for checking the button states for NES controllers */
#define GPAD_NES_B 0x01
#define GPAD_NES_SELECT 0x04
#define GPAD_NES_START 0x08
#define GPAD_NES_UP 0x10
#define GPAD_NES_DOWN 0x20
#define GPAD_NES_LEFT 0x40
#define GPAD_NES_RIGHT 0x80
#define GPAD_NES_A 0x100
typedef enum {
/* holds the GPIO pins for the clock, strobe and data signals */
typedef struct {
int16_t port;
int16_t pin_clock;
int16_t pin_strobe;
int16_t pin_data;
uint16_t state;
int16_t gpad_open(GPAD_ST* const gpad);
int16_t gpad_close();
int16_t gpad_ioctrl();
int16_t gpad_read(GPAD_ST* const gpad);
#endif /* GAMEPAD_H_ */