matrix.c (1539B)
1 /* Copyright 2022 durken (https://github.com/durken1/) 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 */ 16 17 #include "matrix.h" 18 #include "i2c_slave.h" 19 20 #define MY_I2C_ADDRESS (0x20U << 1) 21 22 void matrix_init_custom(void) { 23 i2c_slave_init(MY_I2C_ADDRESS); 24 } 25 26 27 bool matrix_scan_custom(matrix_row_t current_matrix[]) { 28 bool matrix_has_changed = false; 29 matrix_row_t current_row_value; 30 31 for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) { 32 current_row_value = 0; // Start with empty row 33 current_row_value |= (((matrix_row_t)(i2c_slave_reg[current_row+4])) << 5); // Add left half scan 34 current_row_value |= ((matrix_row_t)i2c_slave_reg[current_row]); // Add right half scan 35 36 if (current_matrix[current_row] != current_row_value) { 37 matrix_has_changed = true; 38 } 39 current_matrix[current_row] = current_row_value; 40 } 41 42 return matrix_has_changed; 43 }