mirror of
https://github.com/Keychron/qmk_firmware.git
synced 2024-11-25 18:06:34 +06:00
24 lines
750 B
C
Executable File
24 lines
750 B
C
Executable File
#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);
|