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/*
Copyright 2018 Massdrop Inc.
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 "alt.h"
#include "d51_util.h"
const uint8_t row_ports[] = {MATRIX_ROW_PORTS};
const uint8_t row_pins[] = {MATRIX_ROW_PINS};
const uint8_t col_ports[] = {MATRIX_COL_PORTS};
const uint8_t col_pins[] = {MATRIX_COL_PINS};
uint32_t row_masks[2]; // NOTE: If more than PA PB used in the future, adjust code to accommodate
void matrix_init_custom(void) {
row_masks[PA] = 0;
row_masks[PB] = 0;
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
PORT->Group[row_ports[row]].DIRCLR.reg = 1 << row_pins[row]; // Input
PORT->Group[row_ports[row]].OUTCLR.reg = 1 << row_pins[row]; // Low
PORT->Group[row_ports[row]].PINCFG[row_pins[row]].bit.INEN = 1; // Input Enable,
PORT->Group[row_ports[row]].PINCFG[row_pins[row]].bit.PULLEN = 1; // Pull Enable
row_masks[row_ports[row]] |= 1 << row_pins[row]; // Add pin to proper row mask
}
for (uint8_t col = 0; col < MATRIX_COLS; col++) {
PORT->Group[col_ports[col]].DIRSET.reg = 1 << col_pins[col]; // Output
PORT->Group[col_ports[col]].OUTCLR.reg = 1 << col_pins[col]; // Low
}
}
bool matrix_scan_custom(matrix_row_t current_matrix[]) {
matrix_row_t raw[MATRIX_ROWS] = {0};
uint32_t scans[2]; // PA PB
for (uint8_t col = 0; col < MATRIX_COLS; col++) {
PORT->Group[col_ports[col]].OUTSET.reg = 1 << col_pins[col]; // Set col output
matrix_io_delay(); // Delay for output
scans[PA] = PORT->Group[PA].IN.reg & row_masks[PA]; // Read PA row pins data
scans[PB] = PORT->Group[PB].IN.reg & row_masks[PB]; // Read PB row pins data
PORT->Group[col_ports[col]].OUTCLR.reg = 1 << col_pins[col]; // Clear col output
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
// Move scan bits from scans array into proper row bit locations
if (scans[row_ports[row]] & (1 << row_pins[row])) {
raw[row] |= 1 << col;
}
}
}
bool changed = false;
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
if (current_matrix[row] != raw[row]) {
current_matrix[row] = raw[row];
changed = true;
}
}
return changed;
}
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