blob: 6e72005421718ad4e2c69542eda0937a991f2b2c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
#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);
|
