110 lines
3.1 KiB
C
110 lines
3.1 KiB
C
/*
|
|
Copyright 2021 talsu <talsu84@gmail.com>
|
|
|
|
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 "wait.h"
|
|
#include "matrix.h"
|
|
|
|
static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
|
|
static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
|
|
|
|
/* Columns 0 - 3
|
|
* col / pin:
|
|
* 0: C7
|
|
* 1: C6
|
|
* 2: B6
|
|
* 3: B5
|
|
*/
|
|
static void unselect_cols(void) {
|
|
for (uint8_t col = 0; col < MATRIX_COLS; col++) {
|
|
gpio_set_pin_output(col_pins[col]);
|
|
gpio_write_pin_low(col_pins[col]);
|
|
}
|
|
}
|
|
|
|
static void select_col(uint8_t col) {
|
|
gpio_write_pin_high(col_pins[col]);
|
|
}
|
|
|
|
static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
|
|
bool matrix_changed = false;
|
|
|
|
// Select col and wait for col selecton to stabilize
|
|
select_col(current_col);
|
|
wait_us(30);
|
|
|
|
// row:0 , col:0 FN key is DIRECT_PIN
|
|
if (current_col == 0) {
|
|
|
|
matrix_row_t last_row_value = current_matrix[0];
|
|
if (gpio_read_pin(row_pins[0]) == 0) {
|
|
// Pin LO, set col bit
|
|
current_matrix[0] |= (1 << current_col);
|
|
} else {
|
|
// Pin HI, clear col bit
|
|
current_matrix[0] &= ~(1 << current_col);
|
|
}
|
|
|
|
// Determine if the matrix changed state
|
|
if ((last_row_value != current_matrix[0]) && !(matrix_changed)) {
|
|
matrix_changed = true;
|
|
}
|
|
}
|
|
|
|
// other row use MATRIX
|
|
for (uint8_t row_index = 1; row_index < MATRIX_ROWS; row_index++) {
|
|
|
|
matrix_row_t last_row_value = current_matrix[row_index];
|
|
if (gpio_read_pin(row_pins[row_index]) == 0) {
|
|
// Pin HI, clear col bit
|
|
current_matrix[row_index] &= ~(1 << current_col);
|
|
} else {
|
|
// Pin LO, set col bit
|
|
current_matrix[row_index] |= (1 << current_col);
|
|
}
|
|
|
|
// Determine if the matrix changed state
|
|
if ((last_row_value != current_matrix[row_index]) && !(matrix_changed)) {
|
|
matrix_changed = true;
|
|
}
|
|
}
|
|
|
|
|
|
// Unselect cols
|
|
unselect_cols();
|
|
|
|
return matrix_changed;
|
|
}
|
|
|
|
void matrix_init_custom(void) {
|
|
// initialize hardware and global matrix state here
|
|
unselect_cols();
|
|
|
|
// initialize key pins
|
|
for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
|
|
gpio_set_pin_input_high(row_pins[row_index]);
|
|
}
|
|
}
|
|
|
|
bool matrix_scan_custom(matrix_row_t current_matrix[]) {
|
|
bool changed = false;
|
|
|
|
for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
|
|
changed |= read_rows_on_col(current_matrix, current_col);
|
|
}
|
|
|
|
return changed;
|
|
}
|