mh
/
qmk_firmware
mirror of https://github.com/qmk/qmk_firmware/


								#pragma once


								#include "quantum.h"

								#include <stdint.h>

								#include <stdbool.h>

								#include "i2c_master.h"

								#include <util/delay.h>


								/* I2C aliases and register addresses (see "mcp23018.md") */

								#define I2C_ADDR        (0b0100000 << 1)

								#define I2C_TIMEOUT     100

								#define IODIRA          0x00            /* i/o direction register */

								#define IODIRB          0x01

								#define GPPUA           0x0C            /* GPIO pull-up resistor register */

								#define GPPUB           0x0D

								#define GPIOA           0x12            /* general purpose i/o port register (write modifies OLAT) */

								#define GPIOB           0x13

								#define OLATA           0x14            /* output latch register */

								#define OLATB           0x15


								extern uint8_t mcp23018_status;


								uint8_t init_mcp23018(void);