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63 lines
2.0 KiB
63 lines
2.0 KiB
/*
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* Copyright (c) 2018 Charlie Waters
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdint.h>
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#include <stdbool.h>
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#include <string.h>
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#include <hal.h>
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#include "timer.h"
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#include "wait.h"
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#include "print.h"
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#include "matrix.h"
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#include "annepro2.h"
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pin_t row_list[MATRIX_ROWS] = MATRIX_ROW_PINS;
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pin_t col_list[MATRIX_COLS] = MATRIX_COL_PINS;
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bool matrix_scan_custom(matrix_row_t current_matrix[]) {
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bool matrix_has_changed = false;
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// cache of input ports for columns
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static uint16_t port_cache[4];
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// scan each row
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for (int row = 0; row < MATRIX_ROWS; row++) {
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palClearLine(row_list[row]);
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__NOP();
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__NOP();
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__NOP();
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__NOP();
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// read i/o ports
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port_cache[0] = palReadPort(IOPORTA);
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port_cache[1] = palReadPort(IOPORTB);
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port_cache[2] = palReadPort(IOPORTC);
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port_cache[3] = palReadPort(IOPORTD);
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palSetLine(row_list[row]);
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// get columns from ports
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matrix_row_t data = 0;
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for (int col = 0; col < MATRIX_COLS; ++col) {
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pin_t line = col_list[col];
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uint16_t port = port_cache[HT32_PAL_IDX(PAL_PORT(line))];
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data |= (((port & (1 << PAL_PAD(line))) ? 0 : 1) << col);
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}
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if (current_matrix[row] != data) {
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current_matrix[row] = data;
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matrix_has_changed = true;
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}
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}
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return matrix_has_changed;
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}
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