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qmk_firmware/keyboards/matrix/m20add/tca6424.h

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/**
* @file tca6424.h
* @author astro
* @brief driver for the tca6424
*
* 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/>.
*/
#pragma once
#include <stdint.h>
#ifndef TCA6424_ADDR
#define TCA6424_ADDR 0x44
#endif
typedef enum {
TCA6424_PORT0 = 0,
TCA6424_PORT1,
TCA6424_PORT2,
} TCA6424_PORT;
void tca6424_init(void);
void tca6424_write_config(TCA6424_PORT port, uint8_t data);
void tca6424_write_polarity(TCA6424_PORT port, uint8_t data);
void tca6424_write_port(TCA6424_PORT port, uint8_t data);
uint8_t tca6424_read_port(TCA6424_PORT port);