55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
/* Copyright 2021 Jane Bernhardt
|
|
*
|
|
* 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 "quantum.h"
|
|
#include "i2c_master.h"
|
|
|
|
extern i2c_status_t mcp23018_status;
|
|
#define I2C_TIMEOUT 1000
|
|
|
|
#define XXX KC_NO
|
|
|
|
// I2C aliases and register addresses (see "mcp23018.md")
|
|
#define I2C_ADDR 0x20 // 0b0100000
|
|
#define I2C_ADDR_WRITE ((I2C_ADDR << 1) | I2C_WRITE)
|
|
#define I2C_ADDR_READ ((I2C_ADDR << 1) | I2C_READ)
|
|
#define IODIRA 0x00 // i/o direction register
|
|
#define IODIRB 0x01
|
|
#define GPPUA 0x0C // GPIO pull-up resistor register
|
|
#define GPIOA 0x12 // general purpose i/o port register (write modifies OLAT)
|
|
#define OLATA 0x14 // output latch register
|
|
|
|
uint8_t init_mcp23018(void);
|
|
|
|
#define LAYOUT_split_3x5_3( \
|
|
L00, L01, L02, L03, L04, R00, R01, R02, R03, R04, \
|
|
L10, L11, L12, L13, L14, R10, R11, R12, R13, R14, \
|
|
L20, L21, L22, L23, L24, R20, R21, R22, R23, R24, \
|
|
L30, L31, L32, R30, R31, R32 \
|
|
) { \
|
|
{ L04, L14, L24, XXX }, \
|
|
{ L03, L13, L23, L32 }, \
|
|
{ L02, L12, L22, L31 }, \
|
|
{ L01, L11, L21, L30 }, \
|
|
{ L00, L10, L20, XXX }, \
|
|
{ R00, R10, R20, XXX }, \
|
|
{ R01, R11, R21, R30 }, \
|
|
{ R02, R12, R22, R31 }, \
|
|
{ R03, R13, R23, R32 }, \
|
|
{ R04, R14, R24, XXX } \
|
|
}
|