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qmk_firmware

custom branch of QMK firmware git clone https://anongit.hacktivis.me/git/qmk_firmware.git

gergoplex.c (1621B)

    

  1. /* Copyright 2021 Jane Bernhardt
  2.   *
  3.   * This program is free software: you can redistribute it and/or modify
  4.   * it under the terms of the GNU General Public License as published by
  5.   * the Free Software Foundation, either version 2 of the License, or
  6.   * (at your option) any later version.
  7.   *
  8.   * This program is distributed in the hope that it will be useful,
  9.   * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10.   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11.   * GNU General Public License for more details.
  12.   *
  13.   * You should have received a copy of the GNU General Public License
  14.   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15.   */
  17. #include "gergoplex.h"
  19. bool i2c_initialized = 0;
  20. i2c_status_t mcp23018_status = 0x20;
  22. void matrix_init_kb(void) {
  23.     matrix_init_user();
  24. }
  26. uint8_t init_mcp23018(void) {
  27.     print("starting init");
  28.     mcp23018_status = 0x20;
  30.     // I2C subsystem
  32.     if (i2c_initialized == 0) {
  33.         i2c_init();  // on pins D(1,0)
  34.         i2c_initialized = true;
  35.         _delay_ms(1000);
  36.     }
  38.     // set pin direction
  39.     // - unused  : input  : 1
  40.     // - input   : input  : 1
  41.     // - driving : output : 0
  42.     uint8_t data[] = {0b11000001, 0b11111111};
  43.     mcp23018_status = i2c_write_register(I2C_ADDR, IODIRA, data, sizeof(data), I2C_TIMEOUT);
  45.     if (!mcp23018_status) {
  46.         // set pull-up
  47.         // - unused  : on  : 1
  48.         // - input   : on  : 1
  49.         // - driving : off : 0
  50.         mcp23018_status = i2c_write_register(I2C_ADDR, GPPUA, data, sizeof(data), I2C_TIMEOUT);
  51.     }
  53.     return mcp23018_status;
  54. }