diff options
Diffstat (limited to 'drivers/gpio/pca9555.h')
| -rw-r--r-- | drivers/gpio/pca9555.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/gpio/pca9555.h b/drivers/gpio/pca9555.h new file mode 100644 index 0000000000..ebb97e2f30 --- /dev/null +++ b/drivers/gpio/pca9555.h @@ -0,0 +1,55 @@ +/* Copyright 2019 + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#pragma once + +/* + PCA9555 + ,----------. + SDA --| SDA P00 |-- P00 + SCL --| SCL P01 |-- P01 + INT --| INT P02 |-- P02 + | P03 |-- P03 + A0 --| A0 P04 |-- P04 + A1 --| A1 P05 |-- P05 + A2 --| A2 P06 |-- P06 + | P07 |-- P07 + | | + | P10 |-- P10 + | P11 |-- P11 + | P12 |-- P12 + | P13 |-- P13 + | P14 |-- P14 + | P15 |-- P15 + | P16 |-- P16 + | P17 |-- P17 + `----------' +*/ + +#define PCA9555_PORT0 0 +#define PCA9555_PORT1 1 + +#define ALL_OUTPUT 0 +#define ALL_INPUT 0xFF +#define ALL_LOW 0 +#define ALL_HIGH 0xFF + +void pca9555_init(uint8_t slave_addr); + +void pca9555_set_config(uint8_t slave_addr, uint8_t port, uint8_t conf); + +void pca9555_set_output(uint8_t slave_addr, uint8_t port, uint8_t conf); + +uint8_t pca9555_readPins(uint8_t slave_addr, uint8_t port); |