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
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
|
/*
Copyright 2012-2018 Jun Wako, Jack Humbert, Yiancar
Copyright 2019 Evy Dekkers
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 "matrix.h"
#include "gpio.h"
static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
/* Cols 0 - 16
* These columns use two 74HC138 3 to 8 bit demultiplexer. B0, F1 is the enable pin, must be set high (1) to use it.
*
* col / pin: PB5 PB7 PF0 PB0 PF1 PE6
* 0: 0 ── 0 ── 0 1 ── 0 0
* ────────────────────────────────────────────
* 1: 0 ── 0 ── 1 1 ── 0 0
* ────────────────────────────────────────────
* 2: 0 ── 1 ── 0 1 ── 0 0
* ────────────────────────────────────────────
* 3: 0 ── 1 ── 1 1 ── 0 0
* ────────────────────────────────────────────
* 4: 1 ── 0 ── 0 1 ── 0 0
* ────────────────────────────────────────────
* 5: 1 ── 0 ── 1 1 ── 0 0
* ────────────────────────────────────────────
* 6: 1 ── 1 ── 0 1 ── 0 0
* ────────────────────────────────────────────
* 7: 1 ── 1 ── 1 1 ── 0 0
* ────────────────────────────────────────────
* 8: 0 ── 0 ── 0 0 ── 1 0
* ────────────────────────────────────────────
* 9: 0 ── 0 ── 1 0 ── 1 0
* ────────────────────────────────────────────
*10: 0 ── 1 ── 0 0 ── 1 0
* ────────────────────────────────────────────
*11: 0 ── 1 ── 1 0 ── 1 0
* ────────────────────────────────────────────
*12: 1 ── 0 ── 0 0 ── 1 0
* ────────────────────────────────────────────
*13: 1 ── 0 ── 1 0 ── 1 0
* ────────────────────────────────────────────
*14: 1 ── 1 ── 1 0 ── 1 0
* ────────────────────────────────────────────
*15: 1 ── 1 ── 0 0 ── 1 0
* ────────────────────────────────────────────
*16: 0 ── 0 ── 0 0 ── 0 1
*
*/
static void select_col(uint8_t col) {
switch (col) {
case 0:
writePinLow(B5);
writePinLow(B7);
writePinLow(F0);
writePinHigh(B0);
break;
case 1:
writePinLow(B5);
writePinLow(B7);
writePinHigh(F0);
writePinHigh(B0);
break;
case 2:
writePinLow(B5);
writePinHigh(B7);
writePinLow(F0);
writePinHigh(B0);
break;
case 3:
writePinLow(B5);
writePinHigh(B7);
writePinHigh(F0);
writePinHigh(B0);
break;
case 4:
writePinHigh(B5);
writePinLow(B7);
writePinLow(F0);
writePinHigh(B0);
break;
case 5:
writePinHigh(B5);
writePinLow(B7);
writePinHigh(F0);
writePinHigh(B0);
break;
case 6:
writePinHigh(B5);
writePinHigh(B7);
writePinLow(F0);
writePinHigh(B0);
break;
case 7:
writePinHigh(B5);
writePinHigh(B7);
writePinHigh(F0);
writePinHigh(B0);
break;
case 8:
writePinLow(B5);
writePinLow(B7);
writePinLow(F0);
writePinHigh(F1);
break;
case 9:
writePinLow(B5);
writePinLow(B7);
writePinHigh(F0);
writePinHigh(F1);
break;
case 10:
writePinLow(B5);
writePinHigh(B7);
writePinLow(F0);
writePinHigh(F1);
break;
case 11:
writePinLow(B5);
writePinHigh(B7);
writePinHigh(F0);
writePinHigh(F1);
break;
case 12:
writePinHigh(B5);
writePinLow(B7);
writePinLow(F0);
writePinHigh(F1);
break;
case 13:
writePinHigh(B5);
writePinLow(B7);
writePinHigh(F0);
writePinHigh(F1);
break;
case 14:
writePinHigh(B5);
writePinHigh(B7);
writePinHigh(F0);
writePinHigh(F1);
break;
case 15:
writePinHigh(B5);
writePinHigh(B7);
writePinLow(F0);
writePinHigh(F1);
break;
case 16:
writePinLow(E6);
break;
}
}
static void unselect_col(uint8_t col) {
switch (col) {
case 0:
writePinHigh(B5);
writePinHigh(B7);
writePinHigh(F0);
writePinLow(B0);
break;
case 1:
writePinHigh(B5);
writePinHigh(B7);
writePinLow(F0);
writePinLow(B0);
break;
case 2:
writePinHigh(B5);
writePinLow(B7);
writePinHigh(F0);
writePinLow(B0);
break;
case 3:
writePinHigh(B5);
writePinLow(B7);
writePinLow(F0);
writePinLow(B0);
break;
case 4:
writePinLow(B5);
writePinHigh(B7);
writePinHigh(F0);
writePinLow(B0);
break;
case 5:
writePinLow(B5);
writePinHigh(B7);
writePinLow(F0);
writePinLow(B0);
break;
case 6:
writePinLow(B5);
writePinLow(B7);
writePinHigh(F0);
writePinLow(B0);
break;
case 7:
writePinLow(B5);
writePinLow(B7);
writePinLow(F0);
writePinLow(B0);
break;
case 8:
writePinHigh(B5);
writePinHigh(B7);
writePinHigh(F0);
writePinLow(F1);
break;
case 9:
writePinHigh(B5);
writePinHigh(B7);
writePinLow(F0);
writePinLow(F1);
break;
case 10:
writePinHigh(B5);
writePinLow(B7);
writePinHigh(F0);
writePinLow(F1);
break;
case 11:
writePinHigh(B5);
writePinLow(B7);
writePinLow(F0);
writePinLow(F1);
break;
case 12:
writePinLow(B5);
writePinHigh(B7);
writePinHigh(F0);
writePinLow(F1);
break;
case 13:
writePinLow(B5);
writePinHigh(B7);
writePinLow(F0);
writePinLow(F1);
break;
case 14:
writePinLow(B5);
writePinLow(B7);
writePinLow(F0);
writePinLow(F1);
break;
case 15:
writePinLow(B5);
writePinLow(B7);
writePinHigh(F0);
writePinLow(F1);
break;
case 16:
writePinHigh(E6);
break;
}
}
static void unselect_cols(void) {
//Native
writePinHigh(E6);
//Demultiplexer
writePinLow(B0);
writePinLow(F1);
writePinHigh(B5);
writePinHigh(B7);
writePinHigh(F0);
}
static void init_pins(void) {
unselect_cols();
for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
setPinInputHigh(row_pins[x]);
}
setPinOutput(B5);
setPinOutput(B7);
setPinOutput(F0);
setPinOutput(B0);
setPinOutput(F1);
setPinOutput(E6);
}
static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
bool matrix_changed = false;
// Select col and wait for col selecton to stabilize
select_col(current_col);
matrix_io_delay();
// For each row...
for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
// Store last value of row prior to reading
matrix_row_t last_row_value = current_matrix[row_index];
// Check row pin state
if (readPin(row_pins[row_index]) == 0) {
// Pin LO, set col bit
current_matrix[row_index] |= (MATRIX_ROW_SHIFTER << current_col);
} else {
// Pin HI, clear col bit
current_matrix[row_index] &= ~(MATRIX_ROW_SHIFTER << current_col);
}
// Determine if the matrix changed state
if ((last_row_value != current_matrix[row_index]) && !(matrix_changed)) {
matrix_changed = true;
}
}
// Unselect col
unselect_col(current_col);
return matrix_changed;
}
void matrix_init_custom(void) {
// initialize key pins
init_pins();
}
bool matrix_scan_custom(matrix_row_t current_matrix[]) {
bool changed = false;
// Set col, read rows
for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
changed |= read_rows_on_col(current_matrix, current_col);
}
return changed;
}
|
