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.
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.
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/>.
21 SDA --| SDA P00 |-- P00
22 SCL --| SCL P01 |-- P01
23 INT --| INT P02 |-- P02
41 #define PCA9555_PORT0 0
42 #define PCA9555_PORT1 1
45 #define ALL_INPUT 0xFF
49 void pca9555_init(uint8_t slave_addr);
51 void pca9555_set_config(uint8_t slave_addr, uint8_t port, uint8_t conf);
53 void pca9555_set_output(uint8_t slave_addr, uint8_t port, uint8_t conf);
55 uint8_t pca9555_readPins(uint8_t slave_addr, uint8_t port);