gergoplex.h (1219B)
1 /* Copyright 2021 Jane Bernhardt 2 * 3 * This program is free software: you can redistribute it and/or modify 4 * it under the terms of the GNU General Public License as published by 5 * the Free Software Foundation, either version 2 of the License, or 6 * (at your option) any later version. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program. If not, see <http://www.gnu.org/licenses/>. 15 */ 16 17 #pragma once 18 19 #include "quantum.h" 20 #include "i2c_master.h" 21 22 extern i2c_status_t mcp23018_status; 23 #define I2C_TIMEOUT 1000 24 25 #define XXX KC_NO 26 27 // I2C aliases and register addresses (see "mcp23018.md") 28 #define I2C_ADDR (0x20 << 1) // 0b0100000 29 #define IODIRA 0x00 // i/o direction register 30 #define IODIRB 0x01 31 #define GPPUA 0x0C // GPIO pull-up resistor register 32 #define GPIOA 0x12 // general purpose i/o port register (write modifies OLAT) 33 #define OLATA 0x14 // output latch register 34 35 uint8_t init_mcp23018(void);