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-rw-r--r--keyboards/jj50/matrix.c107
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diff --git a/keyboards/jj50/matrix.c b/keyboards/jj50/matrix.c
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1/*
2Copyright 2017 Luiz Ribeiro <luizribeiro@gmail.com>
3Modified 2018 by Wayne K Jones <github.com/WarmCatUK>
4
5This program is free software: you can redistribute it and/or modify
6it under the terms of the GNU General Public License as published by
7the Free Software Foundation, either version 2 of the License, or
8(at your option) any later version.
9
10This program is distributed in the hope that it will be useful,
11but WITHOUT ANY WARRANTY; without even the implied warranty of
12MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13GNU General Public License for more details.
14
15You should have received a copy of the GNU General Public License
16along with this program. If not, see <http://www.gnu.org/licenses/>.
17*/
18
19#include <avr/io.h>
20#include <util/delay.h>
21
22#include "matrix.h"
23
24#ifndef DEBOUNCE
25# define DEBOUNCE 5
26#endif
27
28static uint8_t debouncing = DEBOUNCE;
29
30static matrix_row_t matrix[MATRIX_ROWS];
31static matrix_row_t matrix_debouncing[MATRIX_ROWS];
32
33void matrix_init(void) {
34 // all outputs for rows high
35 DDRB = 0xFF;
36 PORTB = 0xFF;
37 // all inputs for columns
38 DDRA = 0x00;
39 DDRC &= ~(0x111111<<2);
40 //----> DDRD &= ~(1<<PIND7);
41 // Port D not used on this keyboard
42 // all columns are pulled-up
43 PORTA = 0xFF;
44 PORTC |= (0b111111<<2);
45 //PORTD |= (1<<PIND7);
46 // Port D not used on this keyboard
47
48 // initialize matrix state: all keys off
49 for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
50 matrix[row] = 0x00;
51 matrix_debouncing[row] = 0x00;
52 }
53 matrix_init_quantum(); // missing from original port by Luiz
54}
55
56void matrix_set_row_status(uint8_t row) {
57 DDRB = (1 << row);
58 PORTB = ~(1 << row);
59}
60
61uint8_t bit_reverse(uint8_t x) {
62 x = ((x >> 1) & 0x55) | ((x << 1) & 0xaa);
63 x = ((x >> 2) & 0x33) | ((x << 2) & 0xcc);
64 x = ((x >> 4) & 0x0f) | ((x << 4) & 0xf0);
65 return x;
66}
67
68uint8_t matrix_scan(void) {
69 for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
70 matrix_set_row_status(row);
71 _delay_us(5);
72
73 matrix_row_t cols = (
74 // cols 0..7, PORTA 0 -> 7
75 (~PINA) & 0xFF
76 ) | (
77 // cols 8..13, PORTC 7 -> 0
78 bit_reverse((~PINC) & 0xFF) << 8
79 );
80
81 if (matrix_debouncing[row] != cols) {
82 matrix_debouncing[row] = cols;
83 debouncing = DEBOUNCE;
84 }
85 }
86
87 if (debouncing) {
88 if (--debouncing) {
89 _delay_ms(1);
90 } else {
91 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
92 matrix[i] = matrix_debouncing[i];
93 }
94 }
95 }
96 matrix_scan_quantum(); // also missing in original PS2AVRGB implementation
97 //matrix_scan_user();
98
99 return 1;
100}
101
102inline matrix_row_t matrix_get_row(uint8_t row) {
103 return matrix[row];
104}
105
106void matrix_print(void) {
107}