116 lines
2.9 KiB
C
116 lines
2.9 KiB
C
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/**
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* @file tca6424.c
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* @author astro
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* @brief driver for the tca6424
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "tca6424.h"
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#include "i2c_master.h"
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#define TCA6424_INPUT_PORT0 0x0
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#define TCA6424_INPUT_PORT1 0x01
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#define TCA6424_INPUT_PORT2 0x02
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#define TCA6424_OUTPUT_PORT0 0x04
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#define TCA6424_OUTPUT_PORT1 0x05
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#define TCA6424_OUTPUT_PORT2 0x06
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#define TCA6424_POLARITY_PORT0 0x08
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#define TCA6424_POLARITY_PORT1 0x09
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#define TCA6424_POLARITY_PORT2 0x0A
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#define TCA6424_CONF_PORT0 0x0C
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#define TCA6424_CONF_PORT1 0x0D
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#define TCA6424_CONF_PORT2 0x0E
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#define TIMEOUT 100
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void tca6424_init(void)
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{
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i2c_init();
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}
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static void write_port(uint8_t p, uint8_t d)
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{
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i2c_writeReg(TCA6424_ADDR, p, &d, 1, TIMEOUT);
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}
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static uint8_t read_port(uint8_t port)
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{
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uint8_t data = 0;
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i2c_readReg(TCA6424_ADDR, port, &data, 1, TIMEOUT);
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return data;
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}
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void tca6424_write_config(TCA6424_PORT port, uint8_t data)
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{
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switch(port) {
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case TCA6424_PORT0:
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write_port(TCA6424_CONF_PORT0, data);
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break;
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case TCA6424_PORT1:
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write_port(TCA6424_CONF_PORT1, data);
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break;
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case TCA6424_PORT2:
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write_port(TCA6424_CONF_PORT2, data);
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break;
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}
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}
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void tca6424_write_polarity(TCA6424_PORT port, uint8_t data)
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{
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switch(port) {
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case TCA6424_PORT0:
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write_port(TCA6424_POLARITY_PORT0, data);
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break;
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case TCA6424_PORT1:
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write_port(TCA6424_POLARITY_PORT1, data);
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break;
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case TCA6424_PORT2:
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write_port(TCA6424_POLARITY_PORT2, data);
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break;
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}
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}
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void tca6424_write_port(TCA6424_PORT port, uint8_t data)
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{
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switch(port) {
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case TCA6424_PORT0:
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write_port(TCA6424_OUTPUT_PORT0, data);
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break;
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case TCA6424_PORT1:
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write_port(TCA6424_OUTPUT_PORT1, data);
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break;
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case TCA6424_PORT2:
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write_port(TCA6424_OUTPUT_PORT2, data);
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break;
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}
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}
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uint8_t tca6424_read_port(TCA6424_PORT port)
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{
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switch(port) {
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case TCA6424_PORT0:
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return read_port(TCA6424_INPUT_PORT0);
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case TCA6424_PORT1:
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return read_port(TCA6424_INPUT_PORT1);
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case TCA6424_PORT2:
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return read_port(TCA6424_INPUT_PORT2);
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}
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return 0;
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}
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