mirror of
https://github.com/Keychron/qmk_firmware.git
synced 2024-11-22 08:27:56 +06:00
94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/*
|
|
Copyright 2012-2020 Jun Wako, Jack Humbert, Yiancar, Takeshi Nishio
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#include "matrix.h"
|
|
|
|
#define ROW_SHIFTER ((uint16_t)1)
|
|
|
|
static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
|
|
static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
|
|
|
|
static void select_row(uint8_t row) {
|
|
gpio_set_pin_output(row_pins[row]);
|
|
gpio_write_pin_low(row_pins[row]);
|
|
}
|
|
|
|
static void unselect_row(uint8_t row) {
|
|
gpio_set_pin_input_high(row_pins[row]);
|
|
}
|
|
|
|
static void unselect_rows(void) {
|
|
for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
|
|
gpio_set_pin_input_high(row_pins[x]);
|
|
}
|
|
}
|
|
|
|
static void init_pins(void) {
|
|
unselect_rows();
|
|
for (uint8_t x = 0; x < MATRIX_COLS; x++) {
|
|
gpio_set_pin_input_high(col_pins[x]);
|
|
}
|
|
}
|
|
|
|
static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
|
|
// Store last value of row prior to reading
|
|
matrix_row_t last_row_value = current_matrix[current_row];
|
|
|
|
// Clear data in matrix row
|
|
current_matrix[current_row] = 0;
|
|
|
|
// Select row and wait for row selecton to stabilize
|
|
select_row(current_row);
|
|
matrix_io_delay();
|
|
|
|
// For each col...
|
|
for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
|
|
|
|
// skip reading when index equals (= pin itself)
|
|
if (col_index != current_row) {
|
|
// Check col pin pin_state
|
|
if (gpio_read_pin(col_pins[col_index]) == 0) {
|
|
// Pin LO, set col bit
|
|
current_matrix[current_row] |= (ROW_SHIFTER << col_index);
|
|
} else {
|
|
// Pin HI, clear col bit
|
|
current_matrix[current_row] &= ~(ROW_SHIFTER << col_index);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Unselect row
|
|
unselect_row(current_row);
|
|
|
|
return (last_row_value != current_matrix[current_row]);
|
|
}
|
|
|
|
void matrix_init_custom(void) {
|
|
// initialize key pins
|
|
init_pins();
|
|
}
|
|
|
|
bool matrix_scan_custom(matrix_row_t current_matrix[]) {
|
|
bool changed = false;
|
|
|
|
// Set row, read cols
|
|
for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
|
|
changed |= read_cols_on_row(current_matrix, current_row);
|
|
}
|
|
|
|
return changed;
|
|
}
|