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