1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
/*
Copyright 2018 listofoptions <listofoptions@gmail.com>
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 <string.h>
#if defined(__AVR__)
#include <avr/io.h>
#endif
#include <util/delay.h>
#include "wait.h"
#include "print.h"
#include "debug.h"
#include "util.h"
#include "matrix.h"
#include "timer.h"
#include <LUFA/Drivers/Peripheral/SPI.h>
#include "config.h"
#ifndef DEBOUNCE
# define DEBOUNCE 5
#endif
#if ( DEBOUNCE > 0 )
static uint16_t debouncing_time ;
static bool debouncing = false ;
#endif
static uint8_t matrix [MATRIX_ROWS] = {0};
#if ( DEBOUNCE > 0 )
static uint8_t matrix_debounce_old [MATRIX_ROWS] = {0};
static uint8_t matrix_debounce_new [MATRIX_ROWS] = {0};
#endif
__attribute__ ((weak))
void matrix_init_kb(void) {
matrix_init_user();
}
__attribute__ ((weak))
void matrix_scan_kb(void) {
matrix_scan_user();
}
__attribute__ ((weak))
void matrix_init_user(void) {
}
__attribute__ ((weak))
void matrix_scan_user(void) {
}
// the keyboard's internal wiring is such that the inputs to the logic are
// a clock signal, and a reset line.
// the output is a single output pin. im bitbanging here, but the SPI controller
// would work normally
//
// the device functions, by using the clock signal to count 128 bits, the lower
// 3 bits of this 7 bit counter are tied to a 1-of-8 multiplexer, this forms
// the columns.
// the upper 4 bits form the rows, and are decoded using bcd to decimal
// decoders, so that 14 out of 16 of the outputs are wired to the rows of the
// matrix. each switch has a diode, such that the row signal feeds into the
// switch, and then into the diode, then into one of the columns into the
// matrix. the reset pin can be used to reset the entire counter.
#define RESET _BV(PB0)
#define SCLK _BV(PB1)
#define SDATA _BV(PB3)
#define LED _BV(PD6)
inline
static
void SCLK_increment(void) {
PORTB &= ~SCLK ;
_delay_us( 4 ) ; // make sure the line is stable
PORTB |= SCLK ;
_delay_us( 4 ) ;
return ;
}
inline
static
void Matrix_Reset(void) {
PORTB |= RESET ;
_delay_us( 4 ) ; // make sure the line is stable
PORTB &= ~RESET ;
return ;
}
inline
static
uint8_t Matrix_ReceiveByte (void) {
uint8_t received = 0 ;
uint8_t temp = 0 ;
for ( uint8_t bit = 0; bit < MATRIX_COLS; ++bit ) {
// toggle the clock
SCLK_increment();
temp = (PINB & SDATA) << 4 ;
received |= temp >> bit ;
}
return received ;
}
inline
static
void Matrix_ThrowByte(void) {
// we use MATRIX_COLS - 1 here because that would put us at 7 clocks
for ( uint8_t bit = 0; bit < MATRIX_COLS - 1; ++bit ) {
// toggle the clock
SCLK_increment();
}
return ;
}
void matrix_init (void) {
// debug_matrix = 1;
// PB0 (SS) and PB1 (SCLK) set to outputs
DDRB |= RESET | SCLK ;
// PB2, is unused, and PB3 is our serial input
DDRB &= ~SDATA ;
// SS is reset for this board, and is active High
// SCLK is the serial clock and is active High
PORTB &= ~RESET ;
PORTB |= SCLK ;
// led pin
DDRD |= LED ;
PORTD &= ~LED ;
matrix_init_kb();
//toggle reset, to put the keyboard logic into a known state
Matrix_Reset() ;
}
uint8_t matrix_scan(void) {
// the first byte of the keyboard's output data can be ignored
Matrix_ThrowByte();
#if ( DEBOUNCE > 0 )
for ( uint8_t row = 0 ; row < MATRIX_ROWS ; ++row ) {
//transfer old debouncing values
matrix_debounce_old[row] = matrix_debounce_new[row] ;
// read new key-states in
matrix_debounce_new[row] = Matrix_ReceiveByte() ;
if ( matrix_debounce_new[row] != matrix_debounce_old[row] ) {
debouncing = true ;
debouncing_time = timer_read() ;
}
}
#else
// without debouncing we simply just read in the raw matrix
for ( uint8_t row = 0 ; row < MATRIX_ROWS ; ++row ) {
matrix[row] = Matrix_ReceiveByte ;
}
#endif
#if ( DEBOUNCE > 0 )
if ( debouncing && ( timer_elapsed( debouncing_time ) > DEBOUNCE ) ) {
for ( uint8_t row = 0 ; row < MATRIX_ROWS ; ++row ) {
matrix[row] = matrix_debounce_new[row] ;
}
debouncing = false ;
}
#endif
Matrix_Reset() ;
matrix_scan_kb() ;
return 1;
}
inline
uint8_t matrix_get_row( uint8_t row ) {
return matrix[row];
}
void matrix_print(void)
{
print("\nr/c 01234567\n");
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
print_hex8(row); print(": ");
print_bin_reverse8(matrix_get_row(row));
print("\n");
}
}
inline
uint8_t matrix_rows(void) {
return MATRIX_ROWS;
}
inline
uint8_t matrix_cols(void) {
return MATRIX_COLS;
}
// as an aside, I used the M0110 converter:
// tmk_core/common/keyboard.c, quantum/matrix.c, and the project layout of the planck
// the online ducmentation starting from :
// https://docs.qmk.fm/#/config_options
// https://docs.qmk.fm/#/understanding_qmk
// and probably a few i forgot....
|
