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qmk_firmware

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

matrix.c (3280B)

    

  1. /*
  2.  * Copyright 2020 Michael Schwingen
  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.
  8.  *
  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.
  13.  *
  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.  */
  17. #include "util.h"
  18. #include "matrix.h"
  19. #include "debounce.h"
  20. #include "spi_master.h"
  21. #include "print.h"
  22. #include "mschwingen.h"
  24. #define SPI_TIMEOUT 100
  26. /* Keyboard Matrix Assignments */
  27. static uint16_t row_bits[MATRIX_ROWS] = {
  28.     0x4000, 0x8000, 0x2000, 0x1000, 0x0800, 0x0400, 0x0100, 0x0200,
  29.     0x0040, 0x0080, 0x0020, 0x0010, 0x0008, 0x0004, 0x0001, 0x0002};
  31. static const pin_t col_pins[MATRIX_COLS] = {D1, D4, D7, B4, F7, F6, F5, F4};
  33. static void select_col(uint8_t col) {
  34.     gpio_set_pin_output(col_pins[col]);
  35.     gpio_write_pin_low(col_pins[col]);
  36. }
  38. static void unselect_col(uint8_t col) { gpio_set_pin_input_high(col_pins[col]); }
  40. static void unselect_cols(void) {
  41.     for (uint8_t x = 0; x < MATRIX_COLS; x++) {
  42.         gpio_set_pin_input_high(col_pins[x]);
  43.     }
  44. }
  46. static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
  47.     uint16_t row_data;
  48.     bool     matrix_changed = false;
  50.     // Select col and wait for col selecton to stabilize
  51.     select_col(current_col);
  52.     matrix_io_delay();
  54.     gpio_write_pin_low(SR_LOAD_PIN);
  55.     gpio_write_pin_high(SR_LOAD_PIN);
  57.     row_data = spi_read() << 8;
  58.     row_data |= spi_read();
  60.     dprintf("%02X ", ~row_data);
  62.     // For each row...
  63.     for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
  64.         // Store last value of row prior to reading
  65.         matrix_row_t last_row_value    = current_matrix[row_index];
  66.         matrix_row_t current_row_value = last_row_value;
  68.         // Check row pin state
  69.         if ((row_data & row_bits[row_index]) == 0) {
  70.             // Pin LO, set col bit
  71.             current_row_value |= (MATRIX_ROW_SHIFTER << current_col);
  72.         } else {
  73.             // Pin HI, clear col bit
  74.             current_row_value &= ~(MATRIX_ROW_SHIFTER << current_col);
  75.         }
  77.         // Determine if the matrix changed state
  78.         if ((last_row_value != current_row_value)) {
  79.             matrix_changed            = true;
  80.             current_matrix[row_index] = current_row_value;
  81.         }
  82.     }
  84.     // Unselect col
  85.     unselect_col(current_col);
  87.     return matrix_changed;
  88. }
  90. void matrix_init_custom(void) {
  91.     unselect_cols();
  93.     // set 4MHz SPI clock
  94.     SPSR = 0;
  95.     SPCR = _BV(SPE) | _BV(MSTR) | _BV(CPOL);
  96. }
  98. bool matrix_scan_custom(matrix_row_t current_matrix[]) {
  99.     bool changed = false;
  101.     dprint("\r\nScan: ");
  103.     // Set col, read rows
  104.     for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
  105.         changed |= read_rows_on_col(current_matrix, current_col);
  106.     }
  107.     update_layer_leds();
  108.     return changed;
  109. }