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/*
* Copyright (c) 2018 Charlie Waters
*
* 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 <string.h>
#include <hal.h>
#include "timer.h"
#include "wait.h"
#include "print.h"
#include "matrix.h"
#include "annepro2.h"
pin_t row_list[MATRIX_ROWS] = MATRIX_ROW_PINS;
pin_t col_list[MATRIX_COLS] = MATRIX_COL_PINS;
bool matrix_scan_custom(matrix_row_t current_matrix[]) {
bool matrix_has_changed = false;
// cache of input ports for columns
static uint16_t port_cache[4];
// scan each row
for (int row = 0; row < MATRIX_ROWS; row++) {
palClearLine(row_list[row]);
__NOP();
__NOP();
__NOP();
__NOP();
// read i/o ports
port_cache[0] = palReadPort(IOPORTA);
port_cache[1] = palReadPort(IOPORTB);
port_cache[2] = palReadPort(IOPORTC);
port_cache[3] = palReadPort(IOPORTD);
palSetLine(row_list[row]);
// get columns from ports
matrix_row_t data = 0;
for (int col = 0; col < MATRIX_COLS; ++col) {
pin_t line = col_list[col];
uint16_t port = port_cache[HT32_PAL_IDX(PAL_PORT(line))];
data |= (((port & (1 << PAL_PAD(line))) ? 0 : 1) << col);
}
if (current_matrix[row] != data) {
current_matrix[row] = data;
matrix_has_changed = true;
}
}
return matrix_has_changed;
}
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