/*
 * UPIWIN - Micro Pi Windowing Framework Kernel
 * Copyright (C) 2019 Amy Bowersox/Erbosoft Metaverse Design Solutions
 *    
 * 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 2 of the License, or
 * (at your option) 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, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *-------------------------------------------------------------------------
 */
#ifndef __GPIO_H_INCLUDED
#define __GPIO_H_INCLUDED

#include "wintype.h"

#define GPIO_BUTTON_COUNT  4           /* number of GPIO buttons we have */

/* state flags for the GPIO buttons */
#define GRB_STATE_BUTTON1  (1 << 0)
#define GRB_STATE_BUTTON2  (1 << 1)
#define GRB_STATE_BUTTON3  (1 << 2)
#define GRB_STATE_BUTTON4  (1 << 3)

#define GSB_BACKLIGHT_MAX   1023       /* maximum level for backlight */

#define GSB_BACKLIGHT_DEFAULT  GSB_BACKLIGHT_MAX

extern HRESULT Gpio_setup(void);
extern UINT32 Gpio_read_buttons(void);
extern void Gpio_set_backlight(UINT32 level);

#endif /* __GPIO_H_INCLUDED */