mcp23016.h

/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2021 Steven Stallion <sstallion@gmail.com>
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef MCP23016_H
#define MCP23016_H
 
#include <stdint.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
enum mcp23016_control {
    MCP23016_CONTROL_IARES_NORMAL = 0,  
    MCP23016_CONTROL_IARES_FAST = 1     
};
 
struct mcp23016_device;
 
struct mcp23016_device *mcp23016_open(const char *path, unsigned int num);
 
void mcp23016_close(struct mcp23016_device *dev);
 
int mcp23016_reset(struct mcp23016_device *dev);
 
int mcp23016_get_port(struct mcp23016_device *dev, uint16_t *val);
 
int mcp23016_set_port(struct mcp23016_device *dev, uint16_t val);
 
int mcp23016_get_output(struct mcp23016_device *dev, uint16_t *val);
 
int mcp23016_set_output(struct mcp23016_device *dev, uint16_t val);
 
int mcp23016_get_polarity(struct mcp23016_device *dev, uint16_t *val);
 
int mcp23016_set_polarity(struct mcp23016_device *dev, uint16_t val);
 
int mcp23016_get_direction(struct mcp23016_device *dev, uint16_t *val);
 
int mcp23016_set_direction(struct mcp23016_device *dev, uint16_t val);
 
int mcp23016_get_interrupt(struct mcp23016_device *dev, uint16_t *val);
 
static inline int mcp23016_clear_interrupt(struct mcp23016_device *dev)
{
    uint16_t dummy;
 
    return mcp23016_get_interrupt(dev, &dummy);
}
 
int mcp23016_get_control(struct mcp23016_device *dev, uint16_t *val);
 
int mcp23016_set_control(struct mcp23016_device *dev, uint16_t val);
 
struct mcp23016_interrupt;
 
struct mcp23016_interrupt *mcp23016_interrupt_open(const char *path, unsigned int offset);
 
void mcp23016_interrupt_close(struct mcp23016_interrupt *intr);
 
int mcp23016_has_interrupt(struct mcp23016_interrupt *intr);
 
#ifdef __cplusplus
}
#endif
 
#endif /* MCP23016_H */