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-/*
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-Copyright 2012 Jun Wako
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-Generated by planckkeyboard.com (2014 Jack Humbert)
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-
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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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-
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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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-
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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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-/*
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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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-
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-#ifndef DEBOUNCE
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-# define DEBOUNCE 10
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-#endif
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-static uint8_t debouncing = DEBOUNCE;
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-
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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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-static matrix_row_t matrix_debouncing[MATRIX_ROWS];
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-
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-static matrix_row_t read_cols(void);
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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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-
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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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-
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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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-
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-void matrix_init(void)
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-{
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- // To use PORTF disable JTAG with writing JTD bit twice within four cycles.
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- MCUCR |= (1<<JTD);
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- MCUCR |= (1<<JTD);
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-
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- backlight_init_ports();
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-
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- // Turn status LED on
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- DDRE |= (1<<6);
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- PORTE |= (1<<6);
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-
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- // initialize row and col
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- unselect_rows();
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- init_cols();
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-
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- // initialize matrix state: all keys off
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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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-}
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-
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-
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-uint8_t matrix_scan(void)
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-{
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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_cols();
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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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-
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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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-
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- return 1;
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-}
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-
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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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-
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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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-
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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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-
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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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- pbin_reverse16(matrix_get_row(row));
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- print("\n");
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- }
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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 += bitpop16(matrix[i]);
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- }
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- return count;
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-}
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-
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-static void init_cols(void)
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-{
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- int B = 0, C = 0, D = 0, E = 0, F = 0;
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- for(int x = 0; x < MATRIX_COLS; x++) {
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- int col = COLS[x];
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- if ((col & 0xF0) == 0x20) {
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- B |= (1<<(col & 0x0F));
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- } else if ((col & 0xF0) == 0x30) {
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- C |= (1<<(col & 0x0F));
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- } else if ((col & 0xF0) == 0x40) {
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- D |= (1<<(col & 0x0F));
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- } else if ((col & 0xF0) == 0x50) {
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- E |= (1<<(col & 0x0F));
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- } else if ((col & 0xF0) == 0x60) {
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- F |= (1<<(col & 0x0F));
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- }
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- }
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- DDRB &= ~(B); PORTB |= (B);
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- DDRC &= ~(C); PORTC |= (C);
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- DDRD &= ~(D); PORTD |= (D);
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- DDRE &= ~(E); PORTE |= (E);
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- DDRF &= ~(F); PORTF |= (F);
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-}
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-
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-static matrix_row_t read_cols(void)
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-{
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- matrix_row_t result = 0;
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- for(int x = 0; x < MATRIX_COLS; x++) {
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- int col = COLS[x];
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- if ((col & 0xF0) == 0x20) {
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- result |= (PINB&(1<<(col & 0x0F)) ? 0 : (1<<x));
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- } else if ((col & 0xF0) == 0x30) {
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- result |= (PINC&(1<<(col & 0x0F)) ? 0 : (1<<x));
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- } else if ((col & 0xF0) == 0x40) {
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- result |= (PIND&(1<<(col & 0x0F)) ? 0 : (1<<x));
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- } else if ((col & 0xF0) == 0x50) {
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- result |= (PINE&(1<<(col & 0x0F)) ? 0 : (1<<x));
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- } else if ((col & 0xF0) == 0x60) {
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- result |= (PINF&(1<<(col & 0x0F)) ? 0 : (1<<x));
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- }
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- }
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- return result;
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-}
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-
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-static void unselect_rows(void)
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-{
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- int B = 0, C = 0, D = 0, E = 0, F = 0;
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- for(int x = 0; x < MATRIX_ROWS; x++) {
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- int row = ROWS[x];
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- if ((row & 0xF0) == 0x20) {
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- B |= (1<<(row & 0x0F));
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- } else if ((row & 0xF0) == 0x30) {
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- C |= (1<<(row & 0x0F));
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- } else if ((row & 0xF0) == 0x40) {
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- D |= (1<<(row & 0x0F));
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- } else if ((row & 0xF0) == 0x50) {
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- E |= (1<<(row & 0x0F));
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- } else if ((row & 0xF0) == 0x60) {
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- F |= (1<<(row & 0x0F));
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- }
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- }
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- DDRB &= ~(B); PORTB |= (B);
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- DDRC &= ~(C); PORTC |= (C);
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- DDRD &= ~(D); PORTD |= (D);
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- DDRE &= ~(E); PORTE |= (E);
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- DDRF &= ~(F); PORTF |= (F);
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-}
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-
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-static void select_row(uint8_t row)
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-{
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- int row_pin = ROWS[row];
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- if ((row_pin & 0xF0) == 0x20) {
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- DDRB |= (1<<(row_pin & 0x0F));
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- PORTB &= ~(1<<(row_pin & 0x0F));
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- } else if ((row_pin & 0xF0) == 0x30) {
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- DDRC |= (1<<(row_pin & 0x0F));
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- PORTC &= ~(1<<(row_pin & 0x0F));
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- } else if ((row_pin & 0xF0) == 0x40) {
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- DDRD |= (1<<(row_pin & 0x0F));
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- PORTD &= ~(1<<(row_pin & 0x0F));
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- } else if ((row_pin & 0xF0) == 0x50) {
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- DDRE |= (1<<(row_pin & 0x0F));
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- PORTE &= ~(1<<(row_pin & 0x0F));
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- } else if ((row_pin & 0xF0) == 0x60) {
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- DDRF |= (1<<(row_pin & 0x0F));
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- PORTF &= ~(1<<(row_pin & 0x0F));
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- }
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-}
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