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diff --git a/keyboards/lets_split/matrix.c b/keyboards/lets_split/matrix.c
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1/*
2Copyright 2012 Jun Wako <wakojun@gmail.com>
3
4This program is free software: you can redistribute it and/or modify
5it under the terms of the GNU General Public License as published by
6the Free Software Foundation, either version 2 of the License, or
7(at your option) any later version.
8
9This program is distributed in the hope that it will be useful,
10but WITHOUT ANY WARRANTY; without even the implied warranty of
11MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12GNU General Public License for more details.
13
14You should have received a copy of the GNU General Public License
15along with this program. If not, see <http://www.gnu.org/licenses/>.
16*/
17
18/*
19 * scan matrix
20 */
21#include <stdint.h>
22#include <stdbool.h>
23#include <avr/io.h>
24#include "wait.h"
25#include "print.h"
26#include "debug.h"
27#include "util.h"
28#include "matrix.h"
29#include "split_util.h"
30#include "pro_micro.h"
31#include "config.h"
32#include "timer.h"
33
34#ifdef USE_I2C
35# include "i2c.h"
36#else // USE_SERIAL
37# include "serial.h"
38#endif
39
40#ifndef DEBOUNCING_DELAY
41# define DEBOUNCING_DELAY 5
42#endif
43
44#if (DEBOUNCING_DELAY > 0)
45 static uint16_t debouncing_time;
46 static bool debouncing = false;
47#endif
48
49#if (MATRIX_COLS <= 8)
50# define print_matrix_header() print("\nr/c 01234567\n")
51# define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row))
52# define matrix_bitpop(i) bitpop(matrix[i])
53# define ROW_SHIFTER ((uint8_t)1)
54#else
55# error "Currently only supports 8 COLS"
56#endif
57static matrix_row_t matrix_debouncing[MATRIX_ROWS];
58
59#define ERROR_DISCONNECT_COUNT 5
60
61#define ROWS_PER_HAND (MATRIX_ROWS/2)
62
63static uint8_t error_count = 0;
64
65static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
66static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
67
68/* matrix state(1:on, 0:off) */
69static matrix_row_t matrix[MATRIX_ROWS];
70static matrix_row_t matrix_debouncing[MATRIX_ROWS];
71
72#if (DIODE_DIRECTION == COL2ROW)
73 static void init_cols(void);
74 static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row);
75 static void unselect_rows(void);
76 static void select_row(uint8_t row);
77 static void unselect_row(uint8_t row);
78#elif (DIODE_DIRECTION == ROW2COL)
79 static void init_rows(void);
80 static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col);
81 static void unselect_cols(void);
82 static void unselect_col(uint8_t col);
83 static void select_col(uint8_t col);
84#endif
85
86__attribute__ ((weak))
87void matrix_init_kb(void) {
88 matrix_init_user();
89}
90
91__attribute__ ((weak))
92void matrix_scan_kb(void) {
93 matrix_scan_user();
94}
95
96__attribute__ ((weak))
97void matrix_init_user(void) {
98}
99
100__attribute__ ((weak))
101void matrix_scan_user(void) {
102}
103
104__attribute__ ((weak))
105void matrix_slave_scan_user(void) {
106}
107
108inline
109uint8_t matrix_rows(void)
110{
111 return MATRIX_ROWS;
112}
113
114inline
115uint8_t matrix_cols(void)
116{
117 return MATRIX_COLS;
118}
119
120void matrix_init(void)
121{
122#ifdef DISABLE_JTAG
123 // JTAG disable for PORT F. write JTD bit twice within four cycles.
124 MCUCR |= (1<<JTD);
125 MCUCR |= (1<<JTD);
126#endif
127
128 debug_enable = true;
129 debug_matrix = true;
130 debug_mouse = true;
131 // initialize row and col
132#if (DIODE_DIRECTION == COL2ROW)
133 unselect_rows();
134 init_cols();
135#elif (DIODE_DIRECTION == ROW2COL)
136 unselect_cols();
137 init_rows();
138#endif
139
140 TX_RX_LED_INIT;
141
142 // initialize matrix state: all keys off
143 for (uint8_t i=0; i < MATRIX_ROWS; i++) {
144 matrix[i] = 0;
145 matrix_debouncing[i] = 0;
146 }
147
148 matrix_init_quantum();
149
150}
151
152uint8_t _matrix_scan(void)
153{
154 int offset = isLeftHand ? 0 : (ROWS_PER_HAND);
155#if (DIODE_DIRECTION == COL2ROW)
156 // Set row, read cols
157 for (uint8_t current_row = 0; current_row < ROWS_PER_HAND; current_row++) {
158# if (DEBOUNCING_DELAY > 0)
159 bool matrix_changed = read_cols_on_row(matrix_debouncing+offset, current_row);
160
161 if (matrix_changed) {
162 debouncing = true;
163 debouncing_time = timer_read();
164 }
165
166# else
167 read_cols_on_row(matrix+offset, current_row);
168# endif
169
170 }
171
172#elif (DIODE_DIRECTION == ROW2COL)
173 // Set col, read rows
174 for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
175# if (DEBOUNCING_DELAY > 0)
176 bool matrix_changed = read_rows_on_col(matrix_debouncing+offset, current_col);
177 if (matrix_changed) {
178 debouncing = true;
179 debouncing_time = timer_read();
180 }
181# else
182 read_rows_on_col(matrix+offset, current_col);
183# endif
184
185 }
186#endif
187
188# if (DEBOUNCING_DELAY > 0)
189 if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCING_DELAY)) {
190 for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
191 matrix[i+offset] = matrix_debouncing[i+offset];
192 }
193 debouncing = false;
194 }
195# endif
196
197 return 1;
198}
199
200#ifdef USE_I2C
201
202// Get rows from other half over i2c
203int i2c_transaction(void) {
204 int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
205
206 int err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_WRITE);
207 if (err) goto i2c_error;
208
209 // start of matrix stored at 0x00
210 err = i2c_master_write(0x00);
211 if (err) goto i2c_error;
212
213 // Start read
214 err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_READ);
215 if (err) goto i2c_error;
216
217 if (!err) {
218 int i;
219 for (i = 0; i < ROWS_PER_HAND-1; ++i) {
220 matrix[slaveOffset+i] = i2c_master_read(I2C_ACK);
221 }
222 matrix[slaveOffset+i] = i2c_master_read(I2C_NACK);
223 i2c_master_stop();
224 } else {
225i2c_error: // the cable is disconnceted, or something else went wrong
226 i2c_reset_state();
227 return err;
228 }
229
230 return 0;
231}
232
233#else // USE_SERIAL
234
235int serial_transaction(void) {
236 int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
237
238 if (serial_update_buffers()) {
239 return 1;
240 }
241
242 for (int i = 0; i < ROWS_PER_HAND; ++i) {
243 matrix[slaveOffset+i] = serial_slave_buffer[i];
244 }
245 return 0;
246}
247#endif
248
249uint8_t matrix_scan(void)
250{
251 uint8_t ret = _matrix_scan();
252
253#ifdef USE_I2C
254 if( i2c_transaction() ) {
255#else // USE_SERIAL
256 if( serial_transaction() ) {
257#endif
258 // turn on the indicator led when halves are disconnected
259 TXLED1;
260
261 error_count++;
262
263 if (error_count > ERROR_DISCONNECT_COUNT) {
264 // reset other half if disconnected
265 int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
266 for (int i = 0; i < ROWS_PER_HAND; ++i) {
267 matrix[slaveOffset+i] = 0;
268 }
269 }
270 } else {
271 // turn off the indicator led on no error
272 TXLED0;
273 error_count = 0;
274 }
275 matrix_scan_quantum();
276 return ret;
277}
278
279void matrix_slave_scan(void) {
280 _matrix_scan();
281
282 int offset = (isLeftHand) ? 0 : ROWS_PER_HAND;
283
284#ifdef USE_I2C
285 for (int i = 0; i < ROWS_PER_HAND; ++i) {
286 i2c_slave_buffer[i] = matrix[offset+i];
287 }
288#else // USE_SERIAL
289 for (int i = 0; i < ROWS_PER_HAND; ++i) {
290 serial_slave_buffer[i] = matrix[offset+i];
291 }
292#endif
293 matrix_slave_scan_user();
294}
295
296bool matrix_is_modified(void)
297{
298 if (debouncing) return false;
299 return true;
300}
301
302inline
303bool matrix_is_on(uint8_t row, uint8_t col)
304{
305 return (matrix[row] & ((matrix_row_t)1<<col));
306}
307
308inline
309matrix_row_t matrix_get_row(uint8_t row)
310{
311 return matrix[row];
312}
313
314void matrix_print(void)
315{
316 print("\nr/c 0123456789ABCDEF\n");
317 for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
318 phex(row); print(": ");
319 pbin_reverse16(matrix_get_row(row));
320 print("\n");
321 }
322}
323
324uint8_t matrix_key_count(void)
325{
326 uint8_t count = 0;
327 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
328 count += bitpop16(matrix[i]);
329 }
330 return count;
331}
332
333#if (DIODE_DIRECTION == COL2ROW)
334
335static void init_cols(void)
336{
337 for(uint8_t x = 0; x < MATRIX_COLS; x++) {
338 uint8_t pin = col_pins[x];
339 _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
340 _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
341 }
342}
343
344static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
345{
346 // Store last value of row prior to reading
347 matrix_row_t last_row_value = current_matrix[current_row];
348
349 // Clear data in matrix row
350 current_matrix[current_row] = 0;
351
352 // Select row and wait for row selecton to stabilize
353 select_row(current_row);
354 wait_us(30);
355
356 // For each col...
357 for(uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
358
359 // Select the col pin to read (active low)
360 uint8_t pin = col_pins[col_index];
361 uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));
362
363 // Populate the matrix row with the state of the col pin
364 current_matrix[current_row] |= pin_state ? 0 : (ROW_SHIFTER << col_index);
365 }
366
367 // Unselect row
368 unselect_row(current_row);
369
370 return (last_row_value != current_matrix[current_row]);
371}
372
373static void select_row(uint8_t row)
374{
375 uint8_t pin = row_pins[row];
376 _SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
377 _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
378}
379
380static void unselect_row(uint8_t row)
381{
382 uint8_t pin = row_pins[row];
383 _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
384 _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
385}
386
387static void unselect_rows(void)
388{
389 for(uint8_t x = 0; x < ROWS_PER_HAND; x++) {
390 uint8_t pin = row_pins[x];
391 _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
392 _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
393 }
394}
395
396#elif (DIODE_DIRECTION == ROW2COL)
397
398static void init_rows(void)
399{
400 for(uint8_t x = 0; x < ROWS_PER_HAND; x++) {
401 uint8_t pin = row_pins[x];
402 _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
403 _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
404 }
405}
406
407static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
408{
409 bool matrix_changed = false;
410
411 // Select col and wait for col selecton to stabilize
412 select_col(current_col);
413 wait_us(30);
414
415 // For each row...
416 for(uint8_t row_index = 0; row_index < ROWS_PER_HAND; row_index++)
417 {
418
419 // Store last value of row prior to reading
420 matrix_row_t last_row_value = current_matrix[row_index];
421
422 // Check row pin state
423 if ((_SFR_IO8(row_pins[row_index] >> 4) & _BV(row_pins[row_index] & 0xF)) == 0)
424 {
425 // Pin LO, set col bit
426 current_matrix[row_index] |= (ROW_SHIFTER << current_col);
427 }
428 else
429 {
430 // Pin HI, clear col bit
431 current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
432 }
433
434 // Determine if the matrix changed state
435 if ((last_row_value != current_matrix[row_index]) && !(matrix_changed))
436 {
437 matrix_changed = true;
438 }
439 }
440
441 // Unselect col
442 unselect_col(current_col);
443
444 return matrix_changed;
445}
446
447static void select_col(uint8_t col)
448{
449 uint8_t pin = col_pins[col];
450 _SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
451 _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
452}
453
454static void unselect_col(uint8_t col)
455{
456 uint8_t pin = col_pins[col];
457 _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
458 _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
459}
460
461static void unselect_cols(void)
462{
463 for(uint8_t x = 0; x < MATRIX_COLS; x++) {
464 uint8_t pin = col_pins[x];
465 _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
466 _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
467 }
468}
469
470#endif
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