qmk_firmware

QMK firmware for my keyboards (Corne, Sweep Ferris) and trackball (Ploopy Adept)
Log | Files | Refs | Submodules | LICENSE

tca6424.c (3077B)

      1 /**
      2  * @file tca6424.c
      3  * @author astro
      4  * @brief  driver for the tca6424
      5  *
      6  * Copyright 2020 astro <yuleiz@gmail.com>
      7  *
      8  * This program is free software: you can redistribute it and/or modify
      9  * it under the terms of the GNU General Public License as published by
     10  * the Free Software Foundation, either version 2 of the License, or
     11  * (at your option) any later version.
     12  *
     13  * This program is distributed in the hope that it will be useful,
     14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     16  * GNU General Public License for more details.
     17  *
     18  * You should have received a copy of the GNU General Public License
     19  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
     20  */
     21 
     22 #include "tca6424.h"
     23 #include "i2c_master.h"
     24 
     25 #define TCA6424_INPUT_PORT0     0x0
     26 #define TCA6424_INPUT_PORT1     0x01
     27 #define TCA6424_INPUT_PORT2     0x02
     28 
     29 #define TCA6424_OUTPUT_PORT0    0x04
     30 #define TCA6424_OUTPUT_PORT1    0x05
     31 #define TCA6424_OUTPUT_PORT2    0x06
     32 
     33 #define TCA6424_POLARITY_PORT0  0x08
     34 #define TCA6424_POLARITY_PORT1  0x09
     35 #define TCA6424_POLARITY_PORT2  0x0A
     36 
     37 #define TCA6424_CONF_PORT0      0x0C
     38 #define TCA6424_CONF_PORT1      0x0D
     39 #define TCA6424_CONF_PORT2      0x0E
     40 
     41 #define TIMEOUT         100
     42 
     43 void tca6424_init(void)
     44 {
     45     i2c_init();
     46 }
     47 
     48 static void write_port(uint8_t p, uint8_t d)
     49 {
     50     i2c_write_register(TCA6424_ADDR, p, &d, 1, TIMEOUT);
     51 }
     52 
     53 static uint8_t read_port(uint8_t port)
     54 {
     55     uint8_t data = 0;
     56     i2c_read_register(TCA6424_ADDR, port, &data, 1, TIMEOUT);
     57     return data;
     58 }
     59 
     60 void tca6424_write_config(TCA6424_PORT port, uint8_t data)
     61 {
     62     switch(port) {
     63         case TCA6424_PORT0:
     64             write_port(TCA6424_CONF_PORT0, data);
     65             break;
     66         case TCA6424_PORT1:
     67             write_port(TCA6424_CONF_PORT1, data);
     68             break;
     69         case TCA6424_PORT2:
     70             write_port(TCA6424_CONF_PORT2, data);
     71             break;
     72     }
     73 }
     74 
     75 void tca6424_write_polarity(TCA6424_PORT port, uint8_t data)
     76 {
     77     switch(port) {
     78         case TCA6424_PORT0:
     79             write_port(TCA6424_POLARITY_PORT0, data);
     80             break;
     81         case TCA6424_PORT1:
     82             write_port(TCA6424_POLARITY_PORT1, data);
     83             break;
     84         case TCA6424_PORT2:
     85             write_port(TCA6424_POLARITY_PORT2, data);
     86             break;
     87     }
     88 }
     89 
     90 void tca6424_write_port(TCA6424_PORT port, uint8_t data)
     91 {
     92     switch(port) {
     93         case TCA6424_PORT0:
     94             write_port(TCA6424_OUTPUT_PORT0, data);
     95             break;
     96         case TCA6424_PORT1:
     97             write_port(TCA6424_OUTPUT_PORT1, data);
     98             break;
     99         case TCA6424_PORT2:
    100             write_port(TCA6424_OUTPUT_PORT2, data);
    101             break;
    102     }
    103 }
    104 
    105 uint8_t tca6424_read_port(TCA6424_PORT port)
    106 {
    107     switch(port) {
    108         case TCA6424_PORT0:
    109             return read_port(TCA6424_INPUT_PORT0);
    110         case TCA6424_PORT1:
    111             return read_port(TCA6424_INPUT_PORT1);
    112         case TCA6424_PORT2:
    113             return read_port(TCA6424_INPUT_PORT2);
    114     }
    115 
    116     return 0;
    117 }