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diff --git a/keyboards/ergo42/matrix.c b/keyboards/ergo42/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 DEBOUNCE
41# define DEBOUNCE 5
42#endif
43
44#if (DEBOUNCE > 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
104inline
105uint8_t matrix_rows(void)
106{
107 return MATRIX_ROWS;
108}
109
110inline
111uint8_t matrix_cols(void)
112{
113 return MATRIX_COLS;
114}
115
116void matrix_init(void)
117{
118 debug_enable = true;
119 debug_matrix = true;
120 debug_mouse = true;
121 // initialize row and col
122#if (DIODE_DIRECTION == COL2ROW)
123 unselect_rows();
124 init_cols();
125#elif (DIODE_DIRECTION == ROW2COL)
126 unselect_cols();
127 init_rows();
128#endif
129
130 TX_RX_LED_INIT;
131
132 // initialize matrix state: all keys off
133 for (uint8_t i=0; i < MATRIX_ROWS; i++) {
134 matrix[i] = 0;
135 matrix_debouncing[i] = 0;
136 }
137
138 matrix_init_quantum();
139
140}
141
142uint8_t _matrix_scan(void)
143{
144 int offset = isLeftHand ? 0 : (ROWS_PER_HAND);
145#if (DIODE_DIRECTION == COL2ROW)
146 // Set row, read cols
147 for (uint8_t current_row = 0; current_row < ROWS_PER_HAND; current_row++) {
148# if (DEBOUNCE > 0)
149 bool matrix_changed = read_cols_on_row(matrix_debouncing+offset, current_row);
150
151 if (matrix_changed) {
152 debouncing = true;
153 debouncing_time = timer_read();
154 }
155
156# else
157 read_cols_on_row(matrix+offset, current_row);
158# endif
159
160 }
161
162#elif (DIODE_DIRECTION == ROW2COL)
163 // Set col, read rows
164 for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
165# if (DEBOUNCE > 0)
166 bool matrix_changed = read_rows_on_col(matrix_debouncing+offset, current_col);
167 if (matrix_changed) {
168 debouncing = true;
169 debouncing_time = timer_read();
170 }
171# else
172 read_rows_on_col(matrix+offset, current_col);
173# endif
174
175 }
176#endif
177
178# if (DEBOUNCE > 0)
179 if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCE)) {
180 for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
181 matrix[i+offset] = matrix_debouncing[i+offset];
182 }
183 debouncing = false;
184 }
185# endif
186
187 return 1;
188}
189
190#ifdef USE_I2C
191
192// Get rows from other half over i2c
193int i2c_transaction(void) {
194 int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
195
196 int err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_WRITE);
197 if (err) goto i2c_error;
198
199 // start of matrix stored at 0x00
200 err = i2c_master_write(0x00);
201 if (err) goto i2c_error;
202
203 // Start read
204 err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_READ);
205 if (err) goto i2c_error;
206
207 if (!err) {
208 int i;
209 for (i = 0; i < ROWS_PER_HAND-1; ++i) {
210 matrix[slaveOffset+i] = i2c_master_read(I2C_ACK);
211 }
212 matrix[slaveOffset+i] = i2c_master_read(I2C_NACK);
213 i2c_master_stop();
214 } else {
215i2c_error: // the cable is disconnceted, or something else went wrong
216 i2c_reset_state();
217 return err;
218 }
219
220 return 0;
221}
222
223#else // USE_SERIAL
224
225int serial_transaction(void) {
226 int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
227
228 if (serial_update_buffers()) {
229 return 1;
230 }
231
232 for (int i = 0; i < ROWS_PER_HAND; ++i) {
233 matrix[slaveOffset+i] = serial_slave_buffer[i];
234 }
235 return 0;
236}
237#endif
238
239uint8_t matrix_scan(void)
240{
241 uint8_t ret = _matrix_scan();
242
243#ifdef USE_I2C
244 if( i2c_transaction() ) {
245#else // USE_SERIAL
246 if( serial_transaction() ) {
247#endif
248 // turn on the indicator led when halves are disconnected
249 TXLED1;
250
251 error_count++;
252
253 if (error_count > ERROR_DISCONNECT_COUNT) {
254 // reset other half if disconnected
255 int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
256 for (int i = 0; i < ROWS_PER_HAND; ++i) {
257 matrix[slaveOffset+i] = 0;
258 }
259 }
260 } else {
261 // turn off the indicator led on no error
262 TXLED0;
263 error_count = 0;
264 }
265 matrix_scan_quantum();
266 return ret;
267}
268
269void matrix_slave_scan(void) {
270 _matrix_scan();
271
272 int offset = (isLeftHand) ? 0 : ROWS_PER_HAND;
273
274#ifdef USE_I2C
275 for (int i = 0; i < ROWS_PER_HAND; ++i) {
276 i2c_slave_buffer[i] = matrix[offset+i];
277 }
278#else // USE_SERIAL
279 for (int i = 0; i < ROWS_PER_HAND; ++i) {
280 serial_slave_buffer[i] = matrix[offset+i];
281 }
282#endif
283}
284
285bool matrix_is_modified(void)
286{
287 if (debouncing) return false;
288 return true;
289}
290
291inline
292bool matrix_is_on(uint8_t row, uint8_t col)
293{
294 return (matrix[row] & ((matrix_row_t)1<<col));
295}
296
297inline
298matrix_row_t matrix_get_row(uint8_t row)
299{
300 return matrix[row];
301}
302
303void matrix_print(void)
304{
305 print("\nr/c 0123456789ABCDEF\n");
306 for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
307 phex(row); print(": ");
308 pbin_reverse16(matrix_get_row(row));
309 print("\n");
310 }
311}
312
313uint8_t matrix_key_count(void)
314{
315 uint8_t count = 0;
316 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
317 count += bitpop16(matrix[i]);
318 }
319 return count;
320}
321
322#if (DIODE_DIRECTION == COL2ROW)
323
324static void init_cols(void)
325{
326 for(uint8_t x = 0; x < MATRIX_COLS; x++) {
327 uint8_t pin = col_pins[x];
328 _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
329 _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
330 }
331}
332
333static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
334{
335 // Store last value of row prior to reading
336 matrix_row_t last_row_value = current_matrix[current_row];
337
338 // Clear data in matrix row
339 current_matrix[current_row] = 0;
340
341 // Select row and wait for row selecton to stabilize
342 select_row(current_row);
343 wait_us(30);
344
345 // For each col...
346 for(uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
347
348 // Select the col pin to read (active low)
349 uint8_t pin = col_pins[col_index];
350 uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));
351
352 // Populate the matrix row with the state of the col pin
353 current_matrix[current_row] |= pin_state ? 0 : (ROW_SHIFTER << col_index);
354 }
355
356 // Unselect row
357 unselect_row(current_row);
358
359 return (last_row_value != current_matrix[current_row]);
360}
361
362static void select_row(uint8_t row)
363{
364 uint8_t pin = row_pins[row];
365 _SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
366 _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
367}
368
369static void unselect_row(uint8_t row)
370{
371 uint8_t pin = row_pins[row];
372 _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
373 _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
374}
375
376static void unselect_rows(void)
377{
378 for(uint8_t x = 0; x < ROWS_PER_HAND; x++) {
379 uint8_t pin = row_pins[x];
380 _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
381 _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
382 }
383}
384
385#elif (DIODE_DIRECTION == ROW2COL)
386
387static void init_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
396static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
397{
398 bool matrix_changed = false;
399
400 // Select col and wait for col selecton to stabilize
401 select_col(current_col);
402 wait_us(30);
403
404 // For each row...
405 for(uint8_t row_index = 0; row_index < ROWS_PER_HAND; row_index++)
406 {
407
408 // Store last value of row prior to reading
409 matrix_row_t last_row_value = current_matrix[row_index];
410
411 // Check row pin state
412 if ((_SFR_IO8(row_pins[row_index] >> 4) & _BV(row_pins[row_index] & 0xF)) == 0)
413 {
414 // Pin LO, set col bit
415 current_matrix[row_index] |= (ROW_SHIFTER << current_col);
416 }
417 else
418 {
419 // Pin HI, clear col bit
420 current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
421 }
422
423 // Determine if the matrix changed state
424 if ((last_row_value != current_matrix[row_index]) && !(matrix_changed))
425 {
426 matrix_changed = true;
427 }
428 }
429
430 // Unselect col
431 unselect_col(current_col);
432
433 return matrix_changed;
434}
435
436static void select_col(uint8_t col)
437{
438 uint8_t pin = col_pins[col];
439 _SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
440 _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
441}
442
443static void unselect_col(uint8_t col)
444{
445 uint8_t pin = col_pins[col];
446 _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
447 _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
448}
449
450static void unselect_cols(void)
451{
452 for(uint8_t x = 0; x < MATRIX_COLS; x++) {
453 uint8_t pin = col_pins[x];
454 _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
455 _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
456 }
457}
458
459#endif
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