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qmk_firmware

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

matrix.c (3165B)

    

  1. /*
  2. Copyright 2021 talsu <talsu84@gmail.com>
  4. This program is free software: you can redistribute it and/or modify
  5. it under the terms of the GNU General Public License as published by
  6. the Free Software Foundation, either version 2 of the License, or
  7. (at your option) any later version.
  9. This program is distributed in the hope that it will be useful,
  10. but WITHOUT ANY WARRANTY; without even the implied warranty of
  11. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12. GNU General Public License for more details.
  14. You should have received a copy of the GNU General Public License
  15. along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16. */
  18. #include "wait.h"
  19. #include "matrix.h"
  21. static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
  22. static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
  24. /* Columns 0 - 3
  25.  * col / pin:
  26.  * 0: C7
  27.  * 1: C6
  28.  * 2: B6
  29.  * 3: B5
  30.  */
  31. static void unselect_cols(void) {
  32.     for (uint8_t col = 0; col < MATRIX_COLS; col++) {
  33.         gpio_set_pin_output(col_pins[col]);
  34.         gpio_write_pin_low(col_pins[col]);
  35.     }
  36. }
  38. static void select_col(uint8_t col) {
  39.     gpio_write_pin_high(col_pins[col]);
  40. }
  42. static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
  43.     bool matrix_changed = false;
  45.     // Select col and wait for col selecton to stabilize
  46.     select_col(current_col);
  47.     wait_us(30);
  49.     // row:0 , col:0 FN key is DIRECT_PIN
  50.     if (current_col == 0) {
  52.         matrix_row_t last_row_value = current_matrix[0];
  53.         if (gpio_read_pin(row_pins[0]) == 0) {
  54.             // Pin LO, set col bit
  55.             current_matrix[0] |= (1 << current_col);
  56.         } else {
  57.             // Pin HI, clear col bit
  58.             current_matrix[0] &= ~(1 << current_col);
  59.         }
  61.         // Determine if the matrix changed state
  62.         if ((last_row_value != current_matrix[0]) && !(matrix_changed)) {
  63.             matrix_changed = true;
  64.         }
  65.     }
  67.     // other row use MATRIX
  68.     for (uint8_t row_index = 1; row_index < MATRIX_ROWS; row_index++) {
  70.         matrix_row_t last_row_value = current_matrix[row_index];
  71.         if (gpio_read_pin(row_pins[row_index]) == 0) {
  72.             // Pin HI, clear col bit
  73.             current_matrix[row_index] &= ~(1 << current_col);
  74.         } else {
  75.             // Pin LO, set col bit
  76.             current_matrix[row_index] |= (1 << current_col);
  77.         }
  79.         // Determine if the matrix changed state
  80.         if ((last_row_value != current_matrix[row_index]) && !(matrix_changed)) {
  81.             matrix_changed = true;
  82.         }
  83.     }
  86.     // Unselect cols
  87.     unselect_cols();
  89.     return matrix_changed;
  90. }
  92. void matrix_init_custom(void) {
  93.     // initialize hardware and global matrix state here
  94.     unselect_cols();
  96.     // initialize key pins
  97.     for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
  98.         gpio_set_pin_input_high(row_pins[row_index]);
  99.     }
  100. }
  102. bool matrix_scan_custom(matrix_row_t current_matrix[]) {
  103.     bool changed = false;
  105.     for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
  106.         changed |= read_rows_on_col(current_matrix, current_col);
  107.     }
  109.     return changed;
  110. }