diff options
author | Joel Challis <git@zvecr.com> | 2022-02-09 19:55:39 +0000 |
---|---|---|
committer | GitHub <noreply@github.com> | 2022-02-09 19:55:39 +0000 |
commit | 1f67de2001965a11925b530eedbe60f0191fdced (patch) | |
tree | 72f1e728196aca2440fcea0fe7e6de20d0dccded /drivers/gpio/pca9555.h | |
parent | 96afc7a03aa2f9790fb3b14b8b4fccd502818da0 (diff) |
Align existing pca9555 driver to better match mcp23018 API (#16277)
Diffstat (limited to 'drivers/gpio/pca9555.h')
-rw-r--r-- | drivers/gpio/pca9555.h | 81 |
1 files changed, 56 insertions, 25 deletions
diff --git a/drivers/gpio/pca9555.h b/drivers/gpio/pca9555.h index 3341ec3eb5..6362ab68ae 100644 --- a/drivers/gpio/pca9555.h +++ b/drivers/gpio/pca9555.h @@ -1,20 +1,11 @@ -/* Copyright 2019 - * - * 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, see <http://www.gnu.org/licenses/>. - */ +// Copyright 2020 zvecr<git@zvecr.com> +// SPDX-License-Identifier: GPL-2.0-or-later + #pragma once +#include <stdint.h> +#include <stdbool.h> + /* PCA9555 ,----------. @@ -38,20 +29,60 @@ `----------' */ -#define PCA9555_PORT0 0 -#define PCA9555_PORT1 1 +/** + * Port ID + */ +typedef enum { + PCA9555_PORT0, + PCA9555_PORT1, +} pca9555_port_t; -#define ALL_OUTPUT 0 -#define ALL_INPUT 0xFF -#define ALL_LOW 0 -#define ALL_HIGH 0xFF +/** + * 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); -void pca9555_set_config(uint8_t slave_addr, uint8_t port, uint8_t conf); +/** + * Configure input/output to a given port + */ +bool pca9555_set_config(uint8_t slave_addr, pca9555_port_t port, uint8_t conf); -void pca9555_set_output(uint8_t slave_addr, uint8_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); -uint8_t pca9555_readPins(uint8_t slave_addr, uint8_t port); +/** + * 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); -uint16_t pca9555_readAllPins(uint8_t slave_addr); +/** + * Read state of a given port + */ +bool pca9555_readPins(uint8_t slave_addr, pca9555_port_t port, uint8_t* ret); + +/** + * Read state of both ports sequentially + * + * - slightly faster than multiple readPins + */ +bool pca9555_readPins_all(uint8_t slave_addr, uint16_t* ret); |