/* * 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; }