- /**
- * @file tca6424.c
- * @author astro
- * @brief driver for the tca6424
- *
- * 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/>.
- */
-
- #include "tca6424.h"
- #include "i2c_master.h"
-
- #define TCA6424_INPUT_PORT0 0x0
- #define TCA6424_INPUT_PORT1 0x01
- #define TCA6424_INPUT_PORT2 0x02
-
- #define TCA6424_OUTPUT_PORT0 0x04
- #define TCA6424_OUTPUT_PORT1 0x05
- #define TCA6424_OUTPUT_PORT2 0x06
-
- #define TCA6424_POLARITY_PORT0 0x08
- #define TCA6424_POLARITY_PORT1 0x09
- #define TCA6424_POLARITY_PORT2 0x0A
-
- #define TCA6424_CONF_PORT0 0x0C
- #define TCA6424_CONF_PORT1 0x0D
- #define TCA6424_CONF_PORT2 0x0E
-
- #define TIMEOUT 100
-
- void tca6424_init(void)
- {
- i2c_init();
- }
-
- static void write_port(uint8_t p, uint8_t d)
- {
- i2c_write_register(TCA6424_ADDR, p, &d, 1, TIMEOUT);
- }
-
- static uint8_t read_port(uint8_t port)
- {
- uint8_t data = 0;
- i2c_read_register(TCA6424_ADDR, port, &data, 1, TIMEOUT);
- return data;
- }
-
- void tca6424_write_config(TCA6424_PORT port, uint8_t data)
- {
- switch(port) {
- case TCA6424_PORT0:
- write_port(TCA6424_CONF_PORT0, data);
- break;
- case TCA6424_PORT1:
- write_port(TCA6424_CONF_PORT1, data);
- break;
- case TCA6424_PORT2:
- write_port(TCA6424_CONF_PORT2, data);
- break;
- }
- }
-
- void tca6424_write_polarity(TCA6424_PORT port, uint8_t data)
- {
- switch(port) {
- case TCA6424_PORT0:
- write_port(TCA6424_POLARITY_PORT0, data);
- break;
- case TCA6424_PORT1:
- write_port(TCA6424_POLARITY_PORT1, data);
- break;
- case TCA6424_PORT2:
- write_port(TCA6424_POLARITY_PORT2, data);
- break;
- }
- }
-
- void tca6424_write_port(TCA6424_PORT port, uint8_t data)
- {
- switch(port) {
- case TCA6424_PORT0:
- write_port(TCA6424_OUTPUT_PORT0, data);
- break;
- case TCA6424_PORT1:
- write_port(TCA6424_OUTPUT_PORT1, data);
- break;
- case TCA6424_PORT2:
- write_port(TCA6424_OUTPUT_PORT2, data);
- break;
- }
- }
-
- uint8_t tca6424_read_port(TCA6424_PORT port)
- {
- switch(port) {
- case TCA6424_PORT0:
- return read_port(TCA6424_INPUT_PORT0);
- case TCA6424_PORT1:
- return read_port(TCA6424_INPUT_PORT1);
- case TCA6424_PORT2:
- return read_port(TCA6424_INPUT_PORT2);
- }
-
- return 0;
- }
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