mirror of
https://github.com/qmk/qmk_firmware
synced 2024-12-23 00:48:13 +00:00
94 lines
1.8 KiB
C
94 lines
1.8 KiB
C
// Copyright 2020 zvecr<git@zvecr.com>
|
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
|
|
#pragma once
|
|
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
|
|
/*
|
|
PCA9555
|
|
,----------.
|
|
SDA --| SDA P00 |-- P00
|
|
SCL --| SCL P01 |-- P01
|
|
INT --| INT P02 |-- P02
|
|
| P03 |-- P03
|
|
A0 --| A0 P04 |-- P04
|
|
A1 --| A1 P05 |-- P05
|
|
A2 --| A2 P06 |-- P06
|
|
| P07 |-- P07
|
|
| |
|
|
| P10 |-- P10
|
|
| P11 |-- P11
|
|
| P12 |-- P12
|
|
| P13 |-- P13
|
|
| P14 |-- P14
|
|
| P15 |-- P15
|
|
| P16 |-- P16
|
|
| P17 |-- P17
|
|
`----------'
|
|
*/
|
|
|
|
/**
|
|
* Port ID
|
|
*/
|
|
typedef enum {
|
|
PCA9555_PORT0,
|
|
PCA9555_PORT1,
|
|
} pca9555_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
|
|
*/
|
|
void pca9555_init(uint8_t slave_addr);
|
|
|
|
/**
|
|
* Configure input/output to a given port
|
|
*/
|
|
bool pca9555_set_config(uint8_t slave_addr, pca9555_port_t port, uint8_t conf);
|
|
|
|
/**
|
|
* Write high/low to a given port
|
|
*/
|
|
bool pca9555_set_output(uint8_t slave_addr, pca9555_port_t port, uint8_t conf);
|
|
|
|
/**
|
|
* Write high/low to both ports sequentially
|
|
*
|
|
* - slightly faster than multiple set_output
|
|
*/
|
|
bool pca9555_set_output_all(uint8_t slave_addr, uint8_t confA, uint8_t confB);
|
|
|
|
/**
|
|
* Read state of a given port
|
|
*/
|
|
bool pca9555_read_pins(uint8_t slave_addr, pca9555_port_t port, uint8_t* ret);
|
|
|
|
/**
|
|
* Read state of both ports sequentially
|
|
*
|
|
* - slightly faster than multiple readPins
|
|
*/
|
|
bool pca9555_read_pins_all(uint8_t slave_addr, uint16_t* ret);
|
|
|
|
// DEPRECATED - DO NOT USE
|
|
|
|
#define pca9555_readPins pca9555_read_pins
|
|
#define pca9555_readPins_all pca9555_read_pins_all
|