/* mcp23017 i2c gpio expander read and write utilities * * 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. */ #pragma once #define MCP23017_ADDRESS 0x20 int mcp23017_init(uint8_t slave, uint8_t iodira, uint8_t iodirb); int mcp23017_test(uint8_t slave); int mcp23017_toggle(uint8_t slave); int mcp23017_set_output_a(uint8_t slave, uint8_t val); int mcp23017_set_output_b(uint8_t slave, uint8_t val); //int mcp23017_write_byte(uint8_t slave, uint8_t addr, uint8_t byte); //int mcp23017_read_byte(uint8_t slave, uint8_t addr);