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// Copyright 2022 zvecr<git@zvecr.com>
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <stdint.h>
#include <stdbool.h>
/**
* Port ID
*/
typedef enum {
mcp23018_PORTA,
mcp23018_PORTB,
} mcp23018_port_t;
/**
* Helpers for set_config
*/
enum {
ALL_OUTPUT = 0,
ALL_INPUT = 0xFF,
};
/**
* Helpers for set_output
*/
enum {
ALL_LOW = 0,
ALL_HIGH = 0xFF,
};
/**
* Init expander and any other dependent drivers
*/
bool mcp23018_init(uint8_t slave_addr);
/**
* Configure input/output to a given port
*/
bool mcp23018_set_config(uint8_t slave_addr, mcp23018_port_t port, uint8_t conf);
/**
* Write high/low to a given port
*/
bool mcp23018_set_output(uint8_t slave_addr, mcp23018_port_t port, uint8_t conf);
/**
* Write high/low to both ports sequentially
*
* - slightly faster than multiple set_output
*/
bool mcp23018_set_output_all(uint8_t slave_addr, uint8_t confA, uint8_t confB);
/**
* Read state of a given port
*/
bool mcp23018_readPins(uint8_t slave_addr, mcp23018_port_t port, uint8_t* ret);
/**
* Read state of both ports sequentially
*
* - slightly faster than multiple readPins
*/
bool mcp23018_readPins_all(uint8_t slave_addr, uint16_t* ret);
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