287 lines
7.0 KiB
C
287 lines
7.0 KiB
C
/*
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Copyright 2014 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 "print.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 "i2c_wrapper.h"
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#include "kimera.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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#endif
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static uint16_t kimera_scan_timestamp;
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inline
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uint8_t matrix_rows(void)
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{
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return kimera_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 kimera_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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i2c_wrapper_init();
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_delay_ms(1);
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kimera_init();
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kimera_scan_timestamp = timer_read();
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// initialize row and col
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kimera_unselect_rows();
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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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PORTD &= ~(1<<PD4);
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}
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uint8_t matrix_scan(void)
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{
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i2c_wrapper_task();
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/* xprintf("Row: %d, %u\n", matrix_current_row, timer_read()); */
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if (timer_elapsed(kimera_scan_timestamp) >= 1000) {
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xprintf("Scan, %u\n", kimera_scan_timestamp);
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kimera_scan_timestamp = timer_read();
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kimera_scan();
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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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kimera_select_row(matrix_current_row);
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_delay_us(30);
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kimera_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 = kimera_get_col(matrix_current_row, 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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kimera_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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kimera_select_row(i);
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_delay_us(30); // without this wait read unstable value.
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matrix_row_t cols = kimera_read_row(i);
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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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kimera_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 0123456789ABCDEF0123456789ABCDEF\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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