mirror of
https://github.com/Keychron/qmk_firmware.git
synced 2024-12-11 12:45:33 +06:00
167 lines
4.3 KiB
C
167 lines
4.3 KiB
C
|
/*
|
||
|
Copyright 2012-2018 Jun Wako, Jack Humbert, Yiancar
|
||
|
Copyright 2022 jun10000
|
||
|
|
||
|
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 "quantum.h"
|
||
|
|
||
|
#if (MATRIX_COLS <= 8)
|
||
|
# define ROW_SHIFTER ((uint8_t)1)
|
||
|
#elif (MATRIX_COLS <= 16)
|
||
|
# define ROW_SHIFTER ((uint16_t)1)
|
||
|
#elif (MATRIX_COLS <= 32)
|
||
|
# define ROW_SHIFTER ((uint32_t)1)
|
||
|
#endif
|
||
|
|
||
|
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)
|
||
|
{
|
||
|
setPinOutput(row_pins[row]);
|
||
|
writePinLow(row_pins[row]);
|
||
|
}
|
||
|
|
||
|
static void unselect_row(uint8_t row)
|
||
|
{
|
||
|
setPinInputHigh(row_pins[row]);
|
||
|
}
|
||
|
|
||
|
static void unselect_rows(void)
|
||
|
{
|
||
|
for(uint8_t x = 0; x < MATRIX_ROWS; x++) {
|
||
|
setPinInputHigh(row_pins[x]);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static void select_col(uint8_t col)
|
||
|
{
|
||
|
setPinOutput(col_pins[col]);
|
||
|
writePinLow(col_pins[col]);
|
||
|
}
|
||
|
|
||
|
static void unselect_col(uint8_t col)
|
||
|
{
|
||
|
setPinInputHigh(col_pins[col]);
|
||
|
}
|
||
|
|
||
|
static void unselect_cols(void)
|
||
|
{
|
||
|
for(uint8_t x = 0; x < MATRIX_COLS; x++) {
|
||
|
setPinInputHigh(col_pins[x]);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static void init_pins(void) {
|
||
|
unselect_rows();
|
||
|
unselect_cols();
|
||
|
for (uint8_t x = 0; x < MATRIX_COLS; x++) {
|
||
|
setPinInputHigh(col_pins[x]);
|
||
|
}
|
||
|
for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
|
||
|
setPinInputHigh(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];
|
||
|
|
||
|
// Clear data in matrix row
|
||
|
current_matrix[current_row] = 0;
|
||
|
|
||
|
// Select row and wait for row selecton to stabilize
|
||
|
select_row(current_row);
|
||
|
wait_us(30);
|
||
|
|
||
|
// For each col...
|
||
|
for(uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
|
||
|
|
||
|
// Select the col pin to read (active low)
|
||
|
uint8_t pin_state = readPin(col_pins[col_index]);
|
||
|
|
||
|
// Populate the matrix row with the state of the col pin
|
||
|
current_matrix[current_row] |= pin_state ? 0 : (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 and wait for col selecton to stabilize
|
||
|
select_col(current_col);
|
||
|
wait_us(30);
|
||
|
|
||
|
// For each row...
|
||
|
for(uint8_t row_index = 0; row_index < MATRIX_ROWS/2; row_index++)
|
||
|
{
|
||
|
uint8_t tmp = row_index + MATRIX_ROWS/2;
|
||
|
// Store last value of row prior to reading
|
||
|
matrix_row_t last_row_value = current_matrix[tmp];
|
||
|
|
||
|
// Check row pin state
|
||
|
if (readPin(row_pins[row_index]) == 0)
|
||
|
{
|
||
|
// Pin LO, set col bit
|
||
|
current_matrix[tmp] |= (ROW_SHIFTER << current_col);
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
// Pin HI, clear col bit
|
||
|
current_matrix[tmp] &= ~(ROW_SHIFTER << current_col);
|
||
|
}
|
||
|
|
||
|
// Determine if the matrix changed state
|
||
|
if ((last_row_value != current_matrix[tmp]) && !(matrix_changed))
|
||
|
{
|
||
|
matrix_changed = true;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// Unselect col
|
||
|
unselect_col(current_col);
|
||
|
|
||
|
return matrix_changed;
|
||
|
}
|
||
|
|
||
|
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 / 2; current_row++) {
|
||
|
changed |= read_cols_on_row(current_matrix, current_row);
|
||
|
}
|
||
|
//else
|
||
|
// Set col, read rows
|
||
|
for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
|
||
|
changed |= read_rows_on_col(current_matrix, current_col);
|
||
|
}
|
||
|
|
||
|
return (uint8_t)changed;
|
||
|
}
|