mcp23018.h (1193B)
1 /* 2 * Copyright 2020 Richard Titmuss (richard.titmuss@gmail.com) 3 * 4 * This program is free software: you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation, either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program. If not, see <http://www.gnu.org/licenses/>. 16 */ 17 18 #pragma once 19 20 #include <stdbool.h> 21 #include <stdint.h> 22 23 #define IODIRA 0x00 24 #define IODIRB 0x01 25 #define GPPUA 0x0C 26 #define GPPUB 0x0D 27 #define GPIOA 0x12 28 #define GPIOB 0x13 29 30 typedef int16_t mcp23018_status_t; 31 32 void msp23018_init(void); 33 bool mcp23018_reset_required(void); 34 mcp23018_status_t mcp23018_writeReg(uint8_t regaddr, const uint8_t* data, uint16_t length); 35 mcp23018_status_t mcp23018_readReg(uint8_t regaddr, uint8_t* data, uint16_t length);