| Joachim Steiger | b1a81c1 | 2019-07-26 22:13:51 +0200 | [diff] [blame] | 1 | /* mcp23017 i2c gpio expander read and write utilities |
| 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, write to the Free Software |
| 15 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA |
| 16 | */ |
| 17 | #pragma once |
| 18 | |
| 19 | #define MCP23017_ADDRESS 0x20 |
| 20 | |
| Harald Welte | dd5794c | 2021-06-03 13:19:46 +0200 | [diff] [blame] | 21 | int mcp23017_init(uint8_t slave, uint8_t iodira, uint8_t iodirb); |
| Joachim Steiger | f7f1ea8 | 2019-10-24 18:09:05 +0200 | [diff] [blame] | 22 | int mcp23017_test(uint8_t slave); |
| 23 | int mcp23017_toggle(uint8_t slave); |
| Harald Welte | 731e199 | 2021-06-03 13:11:34 +0200 | [diff] [blame^] | 24 | int mcp23017_set_output_a(uint8_t slave, uint8_t val); |
| 25 | int mcp23017_set_output_b(uint8_t slave, uint8_t val); |
| Joachim Steiger | b1a81c1 | 2019-07-26 22:13:51 +0200 | [diff] [blame] | 26 | //int mcp23017_write_byte(uint8_t slave, uint8_t addr, uint8_t byte); |
| 27 | //int mcp23017_read_byte(uint8_t slave, uint8_t addr); |