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/**
* @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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