416 lines
10 KiB
C
416 lines
10 KiB
C
/*
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Copyright 2016 Kai Ryu <kai1103@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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/*
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* scan matrix
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*/
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#include <stdint.h>
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#include <stdbool.h>
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#include <avr/io.h>
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#include <util/delay.h>
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#include "debug.h"
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#include "util.h"
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#include "matrix.h"
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#include "expander.h"
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#include "keymap_in_eeprom.h"
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#include "timer.h"
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#ifndef DEBOUNCE
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# define DEBOUNCE 5
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#endif
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/* matrix state(1:on, 0:off) */
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static matrix_row_t matrix[MATRIX_ROWS];
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#define IMPROVED_DEBOUNCE 1
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#if IMPROVED_DEBOUNCE
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#define DEBOUNCE_MASK ((1 << DEBOUNCE) - 1)
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static uint8_t matrix_current_row;
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static uint16_t matrix_row_timestamp[MATRIX_ROWS];
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static uint8_t matrix_debouncing[MATRIX_ROWS][MATRIX_COLS];
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#else
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static uint8_t debouncing = DEBOUNCE;
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static matrix_row_t matrix_debouncing[MATRIX_ROWS];
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static matrix_row_t read_row(void);
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#endif
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static uint16_t matrix_scan_timestamp;
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static void read_cols(void);
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static uint8_t get_col(uint8_t col);
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static void init_cols(void);
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static void unselect_rows(void);
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static void select_row(uint8_t row);
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inline
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uint8_t matrix_rows(void)
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{
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return MATRIX_ROWS;
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}
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inline
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uint8_t matrix_cols(void)
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{
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return MATRIX_COLS;
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}
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void matrix_init(void)
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{
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// disable JTAG
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MCUCR = (1<<JTD);
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MCUCR = (1<<JTD);
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timer_init();
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_delay_ms(1);
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matrix_scan_timestamp = timer_read();
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// initialize row and col
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unselect_rows();
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init_cols();
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// initialize matrix state: all keys off
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#if IMPROVED_DEBOUNCE
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for (uint8_t i = 0; i < matrix_rows(); i++) {
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matrix[i] = 0;
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matrix_current_row = 0;
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matrix_row_timestamp[i] = timer_read();
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for (uint8_t j = 0; j < matrix_cols(); j++) {
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matrix_debouncing[i][j] = 0;
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}
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}
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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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matrix_debouncing[i] = 0;
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}
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#endif
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}
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uint8_t matrix_scan(void)
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{
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if (timer_elapsed(matrix_scan_timestamp) >= 1000) {
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dprintf("======== 1s task ========\n");
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dprintf("Scan: %u\n", matrix_scan_timestamp);
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matrix_scan_timestamp = timer_read();
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expander_scan();
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dprintf("=========================\n");
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}
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#if IMPROVED_DEBOUNCE
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uint16_t elapsed = timer_elapsed(matrix_row_timestamp[matrix_current_row]);
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if (elapsed >= 1) {
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matrix_row_timestamp[matrix_current_row] = timer_read();
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select_row(matrix_current_row);
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_delay_us(30);
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read_cols();
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for (uint8_t i = 0; i < matrix_cols(); i++) {
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uint8_t *debounce = &matrix_debouncing[matrix_current_row][i];
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uint8_t col = get_col(i);
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uint8_t count = elapsed;
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do {
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*debounce <<= 1;
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*debounce |= col;
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} while (--count);
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matrix_row_t *row = &matrix[matrix_current_row];
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matrix_row_t mask = ((matrix_row_t)1 << i);
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switch (*debounce & DEBOUNCE_MASK) {
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case DEBOUNCE_MASK:
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#if DEBOUNCE > 1
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case (DEBOUNCE_MASK >> 1):
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#if DEBOUNCE > 2
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case (DEBOUNCE_MASK >> 2):
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#if DEBOUNCE > 3
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case (DEBOUNCE_MASK >> 3):
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#if DEBOUNCE > 4
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case (DEBOUNCE_MASK >> 4):
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#if DEBOUNCE > 5
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case (DEBOUNCE_MASK >> 5):
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#if DEBOUNCE > 6
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case (DEBOUNCE_MASK >> 6):
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#if DEBOUNCE > 7
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case (DEBOUNCE_MASK >> 7):
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#if DEBOUNCE > 8
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case (DEBOUNCE_MASK >> 8):
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#if DEBOUNCE > 9
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case (DEBOUNCE_MASK >> 9):
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#if DEBOUNCE > 10
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case (DEBOUNCE_MASK >> 10):
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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if ((*row & mask) == 0) {
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*row |= mask;
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}
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break;
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#if DEBOUNCE > 1
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case ((DEBOUNCE_MASK << 1) & DEBOUNCE_MASK):
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#if DEBOUNCE > 2
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case ((DEBOUNCE_MASK << 2) & DEBOUNCE_MASK):
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#if DEBOUNCE > 3
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case ((DEBOUNCE_MASK << 3) & DEBOUNCE_MASK):
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#if DEBOUNCE > 4
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case ((DEBOUNCE_MASK << 4) & DEBOUNCE_MASK):
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#if DEBOUNCE > 5
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case ((DEBOUNCE_MASK << 5) & DEBOUNCE_MASK):
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#if DEBOUNCE > 6
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case ((DEBOUNCE_MASK << 6) & DEBOUNCE_MASK):
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#if DEBOUNCE > 7
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case ((DEBOUNCE_MASK << 7) & DEBOUNCE_MASK):
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#if DEBOUNCE > 8
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case ((DEBOUNCE_MASK << 8) & DEBOUNCE_MASK):
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#if DEBOUNCE > 9
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case ((DEBOUNCE_MASK << 9) & DEBOUNCE_MASK):
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#if DEBOUNCE > 10
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case ((DEBOUNCE_MASK << 10) & DEBOUNCE_MASK):
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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break;
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case 0:
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if ((*row & mask) != 0) {
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*row &= ~mask;
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}
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break;
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default:
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debug("bounce!: ");
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debug_bin8(*debounce & DEBOUNCE_MASK);
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debug("\n");
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break;
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}
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}
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unselect_rows();
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}
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matrix_current_row++;
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if (matrix_current_row >= matrix_rows()) {
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matrix_current_row = 0;
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}
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#else
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for (uint8_t i = 0; i < matrix_rows(); i++) {
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select_row(i);
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_delay_us(30); // without this wait read unstable value.
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matrix_row_t cols = read_row();
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if (matrix_debouncing[i] != cols) {
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matrix_debouncing[i] = cols;
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if (debouncing) {
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debug("bounce!: "); debug_hex(debouncing); debug("\n");
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}
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debouncing = DEBOUNCE;
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}
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unselect_rows();
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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] = matrix_debouncing[i];
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}
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}
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}
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#endif
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return 1;
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}
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#if IMPROVED_DEBOUNCE
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#else
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bool matrix_is_modified(void)
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{
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if (debouncing) return false;
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return true;
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}
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#endif
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inline
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bool matrix_is_on(uint8_t row, uint8_t col)
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{
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return (matrix[row] & ((matrix_row_t)1<<col));
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}
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inline
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matrix_row_t matrix_get_row(uint8_t row)
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{
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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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print("\nr/c 0123456789ABCDEF\n");
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for (uint8_t row = 0; row < matrix_rows(); row++) {
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phex(row); print(": ");
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print_bin_reverse32(matrix_get_row(row));
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print("\n");
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}
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}
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uint8_t matrix_key_count(void)
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{
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uint8_t count = 0;
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for (uint8_t i = 0; i < matrix_rows(); i++) {
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count += bitpop32(matrix[i]);
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}
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return count;
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}
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/* Column pin configuration
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* col: 0 1 2 3 4 5 6 7 8 9 10 11 12 13
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* pin: EX EX EX EX EX EX EX D3 D2 D4 C6 D7 E6 B4
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*/
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static void init_cols(void)
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{
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// Input with pull-up(DDR:0, PORT:1)
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DDRE &= ~(1<<PE6);
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PORTE |= (1<<PE6);
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DDRD &= ~(1<<PD2 | 1<<PD3 | 1<<PD4 | 1<<PD7);
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PORTD |= (1<<PD2 | 1<<PD3 | 1<<PD4 | 1<<PD7);
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DDRC &= ~(1<<PC6);
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PORTC |= (1<<PC6);
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DDRB &= ~(1<<PB4);
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PORTB |= (1<<PB4);
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// Init I/O expander
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expander_init();
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}
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#if !IMPROVED_DEBOUNCE
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static matrix_row_t read_row(void)
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{
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return expander_read_row() |
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(PIND&(1<<PD3) ? 0 : (1<<7)) |
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(PIND&(1<<PD2) ? 0 : (1<<8)) |
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(PIND&(1<<PD4) ? 0 : (1<<9)) |
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(PINC&(1<<PC6) ? 0 : (1<<10)) |
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(PIND&(1<<PD7) ? 0 : (1<<11)) |
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(PINE&(1<<PE6) ? 0 : (1<<12)) |
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(PINB&(1<<PB4) ? 0 : (1<<13));
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}
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#endif
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static void read_cols(void)
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{
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expander_read_cols();
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}
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static uint8_t get_col(uint8_t col)
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{
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switch (col) {
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#ifdef VER_PROTOTYPE
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case 0 ... 6:
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return expander_get_col(col);
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case 7:
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return PIND&(1<<PD3) ? 0 : 1;
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case 8:
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return PIND&(1<<PD2) ? 0 : 1;
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case 9:
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return PIND&(1<<PD4) ? 0 : 1;
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case 10:
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return PINC&(1<<PC6) ? 0 : 1;
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case 11:
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return PIND&(1<<PD7) ? 0 : 1;
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case 12:
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return PINE&(1<<PE6) ? 0 : 1;
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case 13:
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return PINB&(1<<PB4) ? 0 : 1;
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#else
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case 0:
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return PINB&(1<<PB4) ? 0 : 1;
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case 1:
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return PINE&(1<<PE6) ? 0 : 1;
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case 2:
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return PIND&(1<<PD7) ? 0 : 1;
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case 3:
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return PINC&(1<<PC6) ? 0 : 1;
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case 4:
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return PIND&(1<<PD4) ? 0 : 1;
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case 5:
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return PIND&(1<<PD2) ? 0 : 1;
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case 6:
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return PIND&(1<<PD3) ? 0 : 1;
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case 7 ... 13:
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return expander_get_col(13 - col);
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#endif
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default:
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return 0;
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}
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}
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/* Row pin configuration
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* row: 0 1 2 3 4 5
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* pin: F4 F5 F6 F7 B1 B2
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*/
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static void unselect_rows(void)
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{
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// Hi-Z(DDR:0, PORT:0) to unselect
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DDRF &= ~(1<<PF4 | 1<<PF5 | 1<<PF6 | 1<<PF7);
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PORTF &= ~(1<<PF4 | 1<<PF5 | 1<<PF6 | 1<<PF7);
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DDRB &= ~(1<<PB1 | 1<<PB2);
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PORTB &= ~(1<<PB1 | 1<<PB2);
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// I/O expander
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expander_unselect_rows();
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}
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static void select_row(uint8_t row)
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{
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// Output low(DDR:1, PORT:0) to select
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switch (row) {
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case 0:
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DDRF |= (1<<PF4);
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PORTF &= ~(1<<PF4);
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break;
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case 1:
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DDRF |= (1<<PF5);
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PORTF &= ~(1<<PF5);
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break;
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case 2:
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DDRF |= (1<<PF6);
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PORTF &= ~(1<<PF6);
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break;
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case 3:
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DDRF |= (1<<PF7);
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PORTF &= ~(1<<PF7);
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break;
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case 4:
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DDRB |= (1<<PB1);
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PORTB &= ~(1<<PB1);
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break;
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case 5:
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DDRB |= (1<<PB2);
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PORTB &= ~(1<<PB2);
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break;
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}
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// I/O expander
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expander_select_row(row);
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}
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