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146 lines
4.1 KiB
146 lines
4.1 KiB
/*
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Copyright 2017 Luiz Ribeiro <luizribeiro@gmail.com>
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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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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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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 <avr/io.h>
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#include <util/delay.h>
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#include "matrix.h"
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#ifndef DEBOUNCE
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# define DEBOUNCE 5
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#endif
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// #define MATRIX_ROW_PINS { A7, A6, A5, A4 }
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// #define MATRIX_COL_PINS { D7, C2, C3, C4, C5, C6, C7, A3, A2, A1, A0, B0 }
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static uint8_t debouncing = DEBOUNCE;
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static matrix_row_t matrix[MATRIX_ROWS];
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static uint8_t matrix_debouncing[MATRIX_COLS];
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void matrix_init(void) {
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MCUCSR = (1<<JTD);
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MCUCSR = (1<<JTD);
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//ADCSRA = 0;
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// rows (input)
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DDRA &= ~((1 << 7) | (1 << 6) | (1 << 5) | (1 << 4));
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PORTA &= ~((1 << 7) | (1 << 6) | (1 << 5) | (1 << 4));
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// cols (output)
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DDRD |= ((1 << 7));
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DDRC |= ((1 << 2) | (1 << 3) | (1 << 4) | (1 << 5) | (1 << 6) | (1 << 7));
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DDRA |= ((1 << 3) | (1 << 2) | (1 << 1) | (1 << 0));
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DDRB |= ((1 << 0));
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PORTD &= ~((1 << 7));
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PORTC &= ~((1 << 2) | (1 << 3) | (1 << 4) | (1 << 5) | (1 << 6) | (1 << 7));
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PORTA &= ~((1 << 3) | (1 << 2) | (1 << 1) | (1 << 0));
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PORTB &= ~((1 << 0));
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// initialize matrix state: all keys off
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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matrix[row] = 0x00;
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}
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for (uint8_t col = 0; col < MATRIX_COLS; col++) {
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matrix_debouncing[col] = 0x00;
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}
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matrix_init_quantum();
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}
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uint8_t matrix_scan(void) {
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for (uint8_t c = 0; c < MATRIX_COLS; c++) {
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switch (c) {
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case 0: PORTD |= (1 << 7); break;
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case 1: PORTC |= (1 << 2); break;
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case 2: PORTC |= (1 << 3); break;
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case 3: PORTC |= (1 << 4); break;
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case 4: PORTC |= (1 << 5); break;
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case 5: PORTC |= (1 << 6); break;
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case 6: PORTC |= (1 << 7); break;
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case 7: PORTA |= (1 << 3); break;
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case 8: PORTA |= (1 << 2); break;
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case 9: PORTA |= (1 << 1); break;
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case 10: PORTA |= (1 << 0); break;
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case 11: PORTB |= (1 << 0); break;
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}
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_delay_us(5);
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uint8_t current_col = (
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((PINA & (1 << 7)) ? 1 : 0 ) |
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(((PINA & (1 << 6)) ? 1 : 0 ) << 1) |
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(((PINA & (1 << 5)) ? 1 : 0 ) << 2) |
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(((PINA & (1 << 4)) ? 1 : 0 ) << 3)
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);
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switch (c) {
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case 0: PORTD &= ~(1 << 7); break;
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case 1: PORTC &= ~(1 << 2); break;
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case 2: PORTC &= ~(1 << 3); break;
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case 3: PORTC &= ~(1 << 4); break;
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case 4: PORTC &= ~(1 << 5); break;
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case 5: PORTC &= ~(1 << 6); break;
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case 6: PORTC &= ~(1 << 7); break;
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case 7: PORTA &= ~(1 << 3); break;
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case 8: PORTA &= ~(1 << 2); break;
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case 9: PORTA &= ~(1 << 1); break;
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case 10: PORTA &= ~(1 << 0); break;
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case 11: PORTB &= ~(1 << 0); break;
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}
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if (matrix_debouncing[c] != current_col) {
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matrix_debouncing[c] = current_col;
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debouncing = DEBOUNCE;
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}
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}
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if (debouncing) {
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if (--debouncing) {
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_delay_ms(1);
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} else {
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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matrix[i] = 0;
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for (uint8_t j = 0; j < MATRIX_COLS; j++) {
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matrix[i] |= (((matrix_debouncing[j] & (1 << i)) ? 1L : 0 ) << j);
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}
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}
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}
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}
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matrix_scan_quantum();
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return 1;
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}
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inline matrix_row_t matrix_get_row(uint8_t row) {
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return matrix[row];
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}
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void matrix_print(void) {
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}
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__attribute__ ((weak))
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void matrix_init_user(void) { }
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__attribute__ ((weak))
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void matrix_scan_user(void) { }
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