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227 lines
5.9 KiB
227 lines
5.9 KiB
/*
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Copyright 2012 Jun Wako
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Copyright 2014 Jack Humbert
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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 <stdint.h>
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#include <stdbool.h>
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#include <avr/io.h>
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#include "wait.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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#ifdef MATRIX_HAS_GHOST
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# error "The universal matrix.c file cannot be used for this keyboard."
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#endif
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#ifndef DEBOUNCING_DELAY
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# define DEBOUNCING_DELAY 5
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#endif
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static const io_pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
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static const io_pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
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/* matrix state */
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#if DIODE_DIRECTION == COL2ROW
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static matrix_row_t matrix[MATRIX_ROWS];
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#else
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static matrix_col_t matrix[MATRIX_COLS];
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#endif
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static int8_t debouncing_delay = -1;
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#if DIODE_DIRECTION == COL2ROW
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static void toggle_row(uint8_t row);
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static matrix_row_t read_cols(void);
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#else
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static void toggle_col(uint8_t col);
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static matrix_col_t read_rows(void);
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#endif
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__attribute__ ((weak))
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void matrix_init_quantum(void) {
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}
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__attribute__ ((weak))
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void matrix_scan_quantum(void) {
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}
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uint8_t matrix_rows(void) {
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return MATRIX_ROWS;
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}
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uint8_t matrix_cols(void) {
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return MATRIX_COLS;
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}
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void matrix_init(void) {
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/* frees PORTF by setting the JTD bit twice within four cycles */
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#ifdef __AVR_ATmega32U4__
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MCUCR |= _BV(JTD);
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MCUCR |= _BV(JTD);
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#endif
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/* initializes the I/O pins */
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#if DIODE_DIRECTION == COL2ROW
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for (int8_t r = MATRIX_ROWS - 1; r >= 0; --r) {
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/* DDRxn */
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_SFR_IO8(row_pins[r].input_addr + 1) |= _BV(row_pins[r].bit);
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toggle_row(r);
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}
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for (int8_t c = MATRIX_COLS - 1; c >= 0; --c) {
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/* PORTxn */
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_SFR_IO8(col_pins[c].input_addr + 2) |= _BV(col_pins[c].bit);
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}
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#else
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for (int8_t c = MATRIX_COLS - 1; c >= 0; --c) {
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/* DDRxn */
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_SFR_IO8(col_pins[c].input_addr + 1) |= _BV(col_pins[c].bit);
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toggle_col(c);
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}
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for (int8_t r = MATRIX_ROWS - 1; r >= 0; --r) {
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/* PORTxn */
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_SFR_IO8(row_pins[r].input_addr + 2) |= _BV(row_pins[r].bit);
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}
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#endif
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matrix_init_quantum();
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}
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#if DIODE_DIRECTION == COL2ROW
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uint8_t matrix_scan(void) {
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static matrix_row_t debouncing_matrix[MATRIX_ROWS];
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for (int8_t r = MATRIX_ROWS - 1; r >= 0; --r) {
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toggle_row(r);
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matrix_row_t state = read_cols();
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if (debouncing_matrix[r] != state) {
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debouncing_matrix[r] = state;
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debouncing_delay = DEBOUNCING_DELAY;
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}
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toggle_row(r);
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}
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if (debouncing_delay >= 0) {
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dprintf("Debouncing delay remaining: %X\n", debouncing_delay);
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--debouncing_delay;
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if (debouncing_delay >= 0) {
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wait_ms(1);
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}
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else {
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for (int8_t r = MATRIX_ROWS - 1; r >= 0; --r) {
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matrix[r] = debouncing_matrix[r];
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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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static void toggle_row(uint8_t row) {
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/* PINxn */
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_SFR_IO8(row_pins[row].input_addr) = _BV(row_pins[row].bit);
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}
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static matrix_row_t read_cols(void) {
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matrix_row_t state = 0;
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for (int8_t c = MATRIX_COLS - 1; c >= 0; --c) {
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/* PINxn */
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if (!(_SFR_IO8(col_pins[c].input_addr) & _BV(col_pins[c].bit))) {
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state |= (matrix_row_t)1 << c;
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}
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}
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return state;
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}
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matrix_row_t matrix_get_row(uint8_t row) {
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return matrix[row];
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}
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#else
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uint8_t matrix_scan(void) {
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static matrix_col_t debouncing_matrix[MATRIX_COLS];
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for (int8_t c = MATRIX_COLS - 1; c >= 0; --c) {
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toggle_col(c);
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matrix_col_t state = read_rows();
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if (debouncing_matrix[c] != state) {
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debouncing_matrix[c] = state;
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debouncing_delay = DEBOUNCING_DELAY;
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}
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toggle_col(c);
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}
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if (debouncing_delay >= 0) {
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dprintf("Debouncing delay remaining: %X\n", debouncing_delay);
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--debouncing_delay;
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if (debouncing_delay >= 0) {
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wait_ms(1);
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}
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else {
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for (int8_t c = MATRIX_COLS - 1; c >= 0; --c) {
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matrix[c] = debouncing_matrix[c];
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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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static void toggle_col(uint8_t col) {
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/* PINxn */
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_SFR_IO8(col_pins[col].input_addr) = _BV(col_pins[col].bit);
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}
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static matrix_col_t read_rows(void) {
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matrix_col_t state = 0;
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for (int8_t r = MATRIX_ROWS - 1; r >= 0; --r) {
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/* PINxn */
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if (!(_SFR_IO8(row_pins[r].input_addr) & _BV(row_pins[r].bit))) {
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state |= (matrix_col_t)1 << r;
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}
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}
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return state;
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}
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matrix_row_t matrix_get_row(uint8_t row) {
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matrix_row_t state = 0;
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matrix_col_t mask = (matrix_col_t)1 << row;
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for (int8_t c = MATRIX_COLS - 1; c >= 0; --c) {
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if (matrix[c] & mask) {
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state |= (matrix_row_t)1 << c;
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}
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}
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return state;
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}
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#endif
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bool matrix_is_modified(void) {
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if (debouncing_delay >= 0) return false;
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return true;
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}
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bool matrix_is_on(uint8_t row, uint8_t col) {
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return matrix_get_row(row) & (matrix_row_t)1 << col;
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}
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void matrix_print(void) {
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dprintln("Human-readable matrix state:");
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for (uint8_t r = 0; r < MATRIX_ROWS; r++) {
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dprintf("State of row %X: %016b\n", r, bitrev16(matrix_get_row(r)));
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}
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}
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uint8_t matrix_key_count(void) {
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uint8_t count = 0;
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for (int8_t r = MATRIX_ROWS - 1; r >= 0; --r) {
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count += bitpop16(matrix_get_row(r));
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}
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return count;
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}
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