forked from forks/qmk_firmware
152 lines
4.3 KiB
C
152 lines
4.3 KiB
C
/*
|
|
Copyright 2012-2018 Jun Wako, Jack Humbert, Yiancar
|
|
|
|
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 <stdint.h>
|
|
#include <stdbool.h>
|
|
#include "matrix.h"
|
|
#include "quantum.h"
|
|
|
|
static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
|
|
static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
|
|
|
|
static inline void setPinOutput_writeLow(pin_t pin) {
|
|
ATOMIC_BLOCK_FORCEON {
|
|
setPinOutput(pin);
|
|
writePinLow(pin);
|
|
}
|
|
}
|
|
|
|
static inline void setPinInputHigh_atomic(pin_t pin) {
|
|
ATOMIC_BLOCK_FORCEON { setPinInputHigh(pin); }
|
|
}
|
|
|
|
static void select_row(uint8_t row) {
|
|
setPinOutput_writeLow(row_pins[row]);
|
|
}
|
|
|
|
static void unselect_row(uint8_t row) {
|
|
setPinInputHigh_atomic(row_pins[row]);
|
|
}
|
|
|
|
static void unselect_rows(void) {
|
|
for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
|
|
setPinInputHigh_atomic(row_pins[x]);
|
|
}
|
|
}
|
|
|
|
static void select_col(uint8_t col) {
|
|
setPinOutput_writeLow(col_pins[col]);
|
|
}
|
|
|
|
static void unselect_col(uint8_t col) {
|
|
setPinInputHigh_atomic(col_pins[col]);
|
|
}
|
|
|
|
static void unselect_cols(void) {
|
|
for (uint8_t x = 0; x < MATRIX_COLS; x++) {
|
|
setPinInputHigh_atomic(col_pins[x]);
|
|
}
|
|
}
|
|
|
|
static void init_pins(void) {
|
|
unselect_rows();
|
|
for (uint8_t x = 0; x < MATRIX_COLS; x++) {
|
|
setPinInputHigh_atomic(col_pins[x]);
|
|
}
|
|
unselect_cols();
|
|
for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
|
|
setPinInputHigh_atomic(row_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];
|
|
|
|
// Select row
|
|
select_row(current_row);
|
|
matrix_io_delay();
|
|
|
|
// For each col...
|
|
for (uint8_t col_index = 0; col_index < MATRIX_COLS / 2; col_index++) {
|
|
// Check row pin state
|
|
if (readPin(col_pins[col_index])) {
|
|
// Pin HI, clear col bit
|
|
current_matrix[current_row] &= ~(MATRIX_ROW_SHIFTER << col_index);
|
|
} else {
|
|
// Pin LO, set col bit
|
|
current_matrix[current_row] |= (MATRIX_ROW_SHIFTER << col_index);
|
|
}
|
|
}
|
|
|
|
// Unselect row
|
|
unselect_row(current_row);
|
|
|
|
return (last_row_value != current_matrix[current_row]);
|
|
}
|
|
|
|
static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
|
|
bool matrix_changed = false;
|
|
|
|
// Select col
|
|
select_col(current_col);
|
|
matrix_io_delay();
|
|
|
|
// For each row...
|
|
for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
|
|
// Store last value of row prior to reading
|
|
matrix_row_t last_row_value = current_matrix[row_index];
|
|
|
|
// Check row pin state
|
|
if (readPin(row_pins[row_index])) {
|
|
// Pin HI, clear col bit
|
|
current_matrix[row_index] &= ~(MATRIX_ROW_SHIFTER << ( current_col + MATRIX_COLS/2));
|
|
} else {
|
|
// Pin LO, set col bit
|
|
current_matrix[row_index] |= (MATRIX_ROW_SHIFTER << ( current_col + MATRIX_COLS/2));
|
|
}
|
|
|
|
// Determine if the matrix changed state
|
|
if ((last_row_value != current_matrix[row_index]) && !(matrix_changed)) {
|
|
matrix_changed = true;
|
|
}
|
|
}
|
|
|
|
// Unselect col
|
|
unselect_col(current_col);
|
|
|
|
return matrix_changed;
|
|
}
|
|
|
|
void matrix_init_custom(void) {
|
|
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);
|
|
}
|
|
// Set col, read rows
|
|
for (uint8_t current_col = 0; current_col < (MATRIX_COLS/2); current_col++) {
|
|
changed |= read_rows_on_col(current_matrix, current_col);
|
|
}
|
|
|
|
return (uint8_t)changed;
|
|
}
|