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- /*
- Copyright 2012 Jun Wako
- Generated by planckkeyboard.com (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/>.
- */
-
- /*
- * scan matrix
- */
- #include <stdint.h>
- #include <stdbool.h>
- #include <avr/io.h>
- #include <util/delay.h>
- #include "print.h"
- #include "debug.h"
- #include "util.h"
- #include "matrix.h"
-
- #ifndef DEBOUNCE
- # define DEBOUNCE 10
- #endif
- static uint8_t debouncing = DEBOUNCE;
-
- /* matrix state(1:on, 0:off) */
- static matrix_row_t matrix[MATRIX_ROWS];
- static matrix_row_t matrix_debouncing[MATRIX_ROWS];
-
- #if DIODE_DIRECTION == ROW2COL
- static matrix_row_t matrix_reversed[MATRIX_COLS];
- static matrix_row_t matrix_reversed_debouncing[MATRIX_COLS];
- #endif
-
- static matrix_row_t read_cols(void);
- static void init_cols(void);
- static void unselect_rows(void);
- static void select_row(uint8_t row);
-
- inline
- uint8_t matrix_rows(void)
- {
- return MATRIX_ROWS;
- }
-
- inline
- uint8_t matrix_cols(void)
- {
- return MATRIX_COLS;
- }
-
- void matrix_init(void)
- {
- // To use PORTF disable JTAG with writing JTD bit twice within four cycles.
- MCUCR |= (1<<JTD);
- MCUCR |= (1<<JTD);
-
- backlight_init_ports();
-
- // Turn status LED on
- DDRE |= (1<<6);
- PORTE |= (1<<6);
-
- // initialize row and col
- unselect_rows();
- init_cols();
-
- // initialize matrix state: all keys off
- for (uint8_t i=0; i < MATRIX_ROWS; i++) {
- matrix[i] = 0;
- matrix_debouncing[i] = 0;
- }
- }
-
-
- uint8_t matrix_scan(void)
- {
- #if DIODE_DIRECTION == COL2ROW
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- select_row(i);
- _delay_us(30); // without this wait read unstable value.
- matrix_row_t cols = read_cols();
- if (matrix_debouncing[i] != cols) {
- matrix_debouncing[i] = cols;
- if (debouncing) {
- debug("bounce!: "); debug_hex(debouncing); debug("\n");
- }
- debouncing = DEBOUNCE;
- }
- unselect_rows();
- }
-
- if (debouncing) {
- if (--debouncing) {
- _delay_ms(1);
- } else {
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- matrix[i] = matrix_debouncing[i];
- }
- }
- }
- #else
- for (uint8_t i = 0; i < MATRIX_COLS; i++) {
- select_row(i);
- _delay_us(30); // without this wait read unstable value.
- matrix_row_t rows = read_cols();
- if (matrix_reversed_debouncing[i] != rows) {
- matrix_reversed_debouncing[i] = rows;
- if (debouncing) {
- debug("bounce!: "); debug_hex(debouncing); debug("\n");
- }
- debouncing = DEBOUNCE;
- }
- unselect_rows();
- }
-
- if (debouncing) {
- if (--debouncing) {
- _delay_ms(1);
- } else {
- for (uint8_t i = 0; i < MATRIX_COLS; i++) {
- matrix_reversed[i] = matrix_reversed_debouncing[i];
- }
- }
- }
- for (uint8_t y = 0; y < MATRIX_ROWS; y++) {
- matrix_row_t row = 0;
- for (uint8_t x = 0; x < MATRIX_COLS; x++) {
- row |= ((matrix_reversed[x] & (1<<y)) >> y) << x;
- }
- matrix[y] = row;
- }
- #endif
-
- return 1;
- }
-
- bool matrix_is_modified(void)
- {
- if (debouncing) return false;
- return true;
- }
-
- inline
- bool matrix_is_on(uint8_t row, uint8_t col)
- {
- return (matrix[row] & ((matrix_row_t)1<col));
- }
-
- inline
- matrix_row_t matrix_get_row(uint8_t row)
- {
- return matrix[row];
- }
-
- void matrix_print(void)
- {
- print("\nr/c 0123456789ABCDEF\n");
- for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
- phex(row); print(": ");
- pbin_reverse16(matrix_get_row(row));
- print("\n");
- }
- }
-
- uint8_t matrix_key_count(void)
- {
- uint8_t count = 0;
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- count += bitpop16(matrix[i]);
- }
- return count;
- }
-
- static void init_cols(void)
- {
- int B = 0, C = 0, D = 0, E = 0, F = 0;
-
- #if DIODE_DIRECTION == COL2ROW
- for(int x = 0; x < MATRIX_COLS; x++) {
- int col = COLS[x];
- #else
- for(int x = 0; x < MATRIX_ROWS; x++) {
- int col = ROWS[x];
- #endif
- if ((col & 0xF0) == 0x20) {
- B |= (1<<(col & 0x0F));
- } else if ((col & 0xF0) == 0x30) {
- C |= (1<<(col & 0x0F));
- } else if ((col & 0xF0) == 0x40) {
- D |= (1<<(col & 0x0F));
- } else if ((col & 0xF0) == 0x50) {
- E |= (1<<(col & 0x0F));
- } else if ((col & 0xF0) == 0x60) {
- F |= (1<<(col & 0x0F));
- }
- }
- DDRB &= ~(B); PORTB |= (B);
- DDRC &= ~(C); PORTC |= (C);
- DDRD &= ~(D); PORTD |= (D);
- DDRE &= ~(E); PORTE |= (E);
- DDRF &= ~(F); PORTF |= (F);
- }
-
- static matrix_row_t read_cols(void)
- {
- matrix_row_t result = 0;
-
- #if DIODE_DIRECTION == COL2ROW
- for(int x = 0; x < MATRIX_COLS; x++) {
- int col = COLS[x];
- #else
- for(int x = 0; x < MATRIX_ROWS; x++) {
- int col = ROWS[x];
- #endif
-
- if ((col & 0xF0) == 0x20) {
- result |= (PINB&(1<<(col & 0x0F)) ? 0 : (1<<x));
- } else if ((col & 0xF0) == 0x30) {
- result |= (PINC&(1<<(col & 0x0F)) ? 0 : (1<<x));
- } else if ((col & 0xF0) == 0x40) {
- result |= (PIND&(1<<(col & 0x0F)) ? 0 : (1<<x));
- } else if ((col & 0xF0) == 0x50) {
- result |= (PINE&(1<<(col & 0x0F)) ? 0 : (1<<x));
- } else if ((col & 0xF0) == 0x60) {
- result |= (PINF&(1<<(col & 0x0F)) ? 0 : (1<<x));
- }
- }
- return result;
- }
-
- static void unselect_rows(void)
- {
- int B = 0, C = 0, D = 0, E = 0, F = 0;
-
- #if DIODE_DIRECTION == COL2ROW
- for(int x = 0; x < MATRIX_ROWS; x++) {
- int row = ROWS[x];
- #else
- for(int x = 0; x < MATRIX_COLS; x++) {
- int row = COLS[x];
- #endif
- if ((row & 0xF0) == 0x20) {
- B |= (1<<(row & 0x0F));
- } else if ((row & 0xF0) == 0x30) {
- C |= (1<<(row & 0x0F));
- } else if ((row & 0xF0) == 0x40) {
- D |= (1<<(row & 0x0F));
- } else if ((row & 0xF0) == 0x50) {
- E |= (1<<(row & 0x0F));
- } else if ((row & 0xF0) == 0x60) {
- F |= (1<<(row & 0x0F));
- }
- }
- DDRB &= ~(B); PORTB |= (B);
- DDRC &= ~(C); PORTC |= (C);
- DDRD &= ~(D); PORTD |= (D);
- DDRE &= ~(E); PORTE |= (E);
- DDRF &= ~(F); PORTF |= (F);
- }
-
- static void select_row(uint8_t row)
- {
-
- #if DIODE_DIRECTION == COL2ROW
- int row_pin = ROWS[row];
- #else
- int row_pin = COLS[row];
- #endif
-
- if ((row_pin & 0xF0) == 0x20) {
- DDRB |= (1<<(row_pin & 0x0F));
- PORTB &= ~(1<<(row_pin & 0x0F));
- } else if ((row_pin & 0xF0) == 0x30) {
- DDRC |= (1<<(row_pin & 0x0F));
- PORTC &= ~(1<<(row_pin & 0x0F));
- } else if ((row_pin & 0xF0) == 0x40) {
- DDRD |= (1<<(row_pin & 0x0F));
- PORTD &= ~(1<<(row_pin & 0x0F));
- } else if ((row_pin & 0xF0) == 0x50) {
- DDRE |= (1<<(row_pin & 0x0F));
- PORTE &= ~(1<<(row_pin & 0x0F));
- } else if ((row_pin & 0xF0) == 0x60) {
- DDRF |= (1<<(row_pin & 0x0F));
- PORTF &= ~(1<<(row_pin & 0x0F));
- }
- }
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