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1/*
2Copyright 2013 Oleg Kostyuk <cub.uanic@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 <util/delay.h>
25#include "action_layer.h"
26#include "print.h"
27#include "debug.h"
28#include "util.h"
29#include "matrix.h"
30#include "ergodox.h"
31#include "i2cmaster.h"
32#ifdef DEBUG_MATRIX_SCAN_RATE
33#include "timer.h"
34#endif
35
36#ifndef DEBOUNCE
37# define DEBOUNCE 5
38#endif
39static uint8_t debouncing = DEBOUNCE;
40
41/* matrix state(1:on, 0:off) */
42static matrix_row_t matrix[MATRIX_ROWS];
43static matrix_row_t matrix_debouncing[MATRIX_ROWS];
44
45static matrix_row_t read_cols(uint8_t row);
46static void init_cols(void);
47static void unselect_rows();
48static void select_row(uint8_t row);
49
50static uint8_t mcp23018_reset_loop;
51
52#ifdef DEBUG_MATRIX_SCAN_RATE
53uint32_t matrix_timer;
54uint32_t matrix_scan_count;
55#endif
56
57
58__attribute__ ((weak))
59void * matrix_init_kb(void) {
60};
61
62__attribute__ ((weak))
63void * matrix_scan_kb(void) {
64};
65
66inline
67uint8_t matrix_rows(void)
68{
69 return MATRIX_ROWS;
70}
71
72inline
73uint8_t matrix_cols(void)
74{
75 return MATRIX_COLS;
76}
77
78void matrix_init(void)
79{
80 // initialize row and col
81
82 mcp23018_status = init_mcp23018();
83
84
85 unselect_rows();
86 init_cols();
87
88 // initialize matrix state: all keys off
89 for (uint8_t i=0; i < MATRIX_ROWS; i++) {
90 matrix[i] = 0;
91 matrix_debouncing[i] = 0;
92 }
93
94#ifdef DEBUG_MATRIX_SCAN_RATE
95 matrix_timer = timer_read32();
96 matrix_scan_count = 0;
97#endif
98
99 if (matrix_init_kb) {
100 (*matrix_init_kb)();
101 }
102
103}
104
105uint8_t matrix_scan(void)
106{
107 if (mcp23018_status) { // if there was an error
108 if (++mcp23018_reset_loop == 0) {
109 // since mcp23018_reset_loop is 8 bit - we'll try to reset once in 255 matrix scans
110 // this will be approx bit more frequent than once per second
111 print("trying to reset mcp23018\n");
112 mcp23018_status = init_mcp23018();
113 if (mcp23018_status) {
114 print("left side not responding\n");
115 } else {
116 print("left side attached\n");
117 ergodox_blink_all_leds();
118 }
119 }
120 }
121
122#ifdef DEBUG_MATRIX_SCAN_RATE
123 matrix_scan_count++;
124
125 uint32_t timer_now = timer_read32();
126 if (TIMER_DIFF_32(timer_now, matrix_timer)>1000) {
127 print("matrix scan frequency: ");
128 pdec(matrix_scan_count);
129 print("\n");
130
131 matrix_timer = timer_now;
132 matrix_scan_count = 0;
133 }
134#endif
135
136#ifdef KEYMAP_CUB
137 uint8_t layer = biton32(layer_state);
138
139 ergodox_board_led_off();
140 ergodox_left_led_1_off();
141 ergodox_left_led_2_off();
142 ergodox_left_led_3_off();
143 switch (layer) {
144 case 1:
145 // all
146 ergodox_left_led_1_on();
147 ergodox_left_led_2_on();
148 ergodox_left_led_3_on();
149 break;
150 case 2:
151 // blue
152 ergodox_left_led_2_on();
153 break;
154 case 8:
155 // blue and green
156 ergodox_left_led_2_on();
157 // break missed intentionally
158 case 3:
159 // green
160 ergodox_left_led_3_on();
161 break;
162 case 6:
163 ergodox_board_led_on();
164 // break missed intentionally
165 case 4:
166 case 5:
167 case 7:
168 // white
169 ergodox_left_led_1_on();
170 break;
171 case 9:
172 // white+green
173 ergodox_left_led_1_on();
174 ergodox_left_led_3_on();
175 break;
176 default:
177 // none
178 break;
179 }
180
181 mcp23018_status = ergodox_left_leds_update();
182#endif
183
184#ifdef KEYMAP_SIMON
185 uint8_t layer = biton32(layer_state);
186
187 ergodox_board_led_off();
188 switch (layer) {
189 case 0:
190// none
191
192 break;
193 default:
194 ergodox_board_led_on();
195 break;
196 }
197#endif
198
199 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
200 select_row(i);
201 matrix_row_t cols = read_cols(i);
202 if (matrix_debouncing[i] != cols) {
203 matrix_debouncing[i] = cols;
204 if (debouncing) {
205 debug("bounce!: "); debug_hex(debouncing); debug("\n");
206 }
207 debouncing = DEBOUNCE;
208 }
209 unselect_rows();
210 }
211
212 if (debouncing) {
213 if (--debouncing) {
214 _delay_ms(1);
215 } else {
216 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
217 matrix[i] = matrix_debouncing[i];
218 }
219 }
220 }
221
222
223 if (matrix_scan_kb) {
224 (*matrix_scan_kb)();
225 }
226
227 return 1;
228}
229
230bool matrix_is_modified(void)
231{
232 if (debouncing) return false;
233 return true;
234}
235
236inline
237bool matrix_is_on(uint8_t row, uint8_t col)
238{
239 return (matrix[row] & ((matrix_row_t)1<<col));
240}
241
242inline
243matrix_row_t matrix_get_row(uint8_t row)
244{
245 return matrix[row];
246}
247
248void matrix_print(void)
249{
250 print("\nr/c 0123456789ABCDEF\n");
251 for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
252 phex(row); print(": ");
253 pbin_reverse16(matrix_get_row(row));
254 print("\n");
255 }
256}
257
258uint8_t matrix_key_count(void)
259{
260 uint8_t count = 0;
261 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
262 count += bitpop16(matrix[i]);
263 }
264 return count;
265}
266
267/* Column pin configuration
268 *
269 * Teensy
270 * col: 0 1 2 3 4 5
271 * pin: F0 F1 F4 F5 F6 F7
272 *
273 * MCP23018
274 * col: 0 1 2 3 4 5
275 * pin: B5 B4 B3 B2 B1 B0
276 */
277static void init_cols(void)
278{
279 // init on mcp23018
280 // not needed, already done as part of init_mcp23018()
281
282 // init on teensy
283 // Input with pull-up(DDR:0, PORT:1)
284 DDRF &= ~(1<<7 | 1<<6 | 1<<5 | 1<<4 | 1<<1 | 1<<0);
285 PORTF |= (1<<7 | 1<<6 | 1<<5 | 1<<4 | 1<<1 | 1<<0);
286}
287
288static matrix_row_t read_cols(uint8_t row)
289{
290 if (row < 7) {
291 if (mcp23018_status) { // if there was an error
292 return 0;
293 } else {
294 uint8_t data = 0;
295 mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
296 mcp23018_status = i2c_write(GPIOB); if (mcp23018_status) goto out;
297 mcp23018_status = i2c_start(I2C_ADDR_READ); if (mcp23018_status) goto out;
298 data = i2c_readNak();
299 data = ~data;
300 out:
301 i2c_stop();
302 return data;
303 }
304 } else {
305 _delay_us(30); // without this wait read unstable value.
306 // read from teensy
307 return
308 (PINF&(1<<0) ? 0 : (1<<0)) |
309 (PINF&(1<<1) ? 0 : (1<<1)) |
310 (PINF&(1<<4) ? 0 : (1<<2)) |
311 (PINF&(1<<5) ? 0 : (1<<3)) |
312 (PINF&(1<<6) ? 0 : (1<<4)) |
313 (PINF&(1<<7) ? 0 : (1<<5)) ;
314 }
315}
316
317/* Row pin configuration
318 *
319 * Teensy
320 * row: 7 8 9 10 11 12 13
321 * pin: B0 B1 B2 B3 D2 D3 C6
322 *
323 * MCP23018
324 * row: 0 1 2 3 4 5 6
325 * pin: A0 A1 A2 A3 A4 A5 A6
326 */
327static void unselect_rows(void)
328{
329 // unselect on mcp23018
330 if (mcp23018_status) { // if there was an error
331 // do nothing
332 } else {
333 // set all rows hi-Z : 1
334 mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
335 mcp23018_status = i2c_write(GPIOA); if (mcp23018_status) goto out;
336 mcp23018_status = i2c_write( 0xFF
337 & ~(ergodox_left_led_3<<LEFT_LED_3_SHIFT)
338 ); if (mcp23018_status) goto out;
339 out:
340 i2c_stop();
341 }
342
343 // unselect on teensy
344 // Hi-Z(DDR:0, PORT:0) to unselect
345 DDRB &= ~(1<<0 | 1<<1 | 1<<2 | 1<<3);
346 PORTB &= ~(1<<0 | 1<<1 | 1<<2 | 1<<3);
347 DDRD &= ~(1<<2 | 1<<3);
348 PORTD &= ~(1<<2 | 1<<3);
349 DDRC &= ~(1<<6);
350 PORTC &= ~(1<<6);
351}
352
353static void select_row(uint8_t row)
354{
355 if (row < 7) {
356 // select on mcp23018
357 if (mcp23018_status) { // if there was an error
358 // do nothing
359 } else {
360 // set active row low : 0
361 // set other rows hi-Z : 1
362 mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
363 mcp23018_status = i2c_write(GPIOA); if (mcp23018_status) goto out;
364 mcp23018_status = i2c_write( 0xFF & ~(1<<row)
365 & ~(ergodox_left_led_3<<LEFT_LED_3_SHIFT)
366 ); if (mcp23018_status) goto out;
367 out:
368 i2c_stop();
369 }
370 } else {
371 // select on teensy
372 // Output low(DDR:1, PORT:0) to select
373 switch (row) {
374 case 7:
375 DDRB |= (1<<0);
376 PORTB &= ~(1<<0);
377 break;
378 case 8:
379 DDRB |= (1<<1);
380 PORTB &= ~(1<<1);
381 break;
382 case 9:
383 DDRB |= (1<<2);
384 PORTB &= ~(1<<2);
385 break;
386 case 10:
387 DDRB |= (1<<3);
388 PORTB &= ~(1<<3);
389 break;
390 case 11:
391 DDRD |= (1<<2);
392 PORTD &= ~(1<<3);
393 break;
394 case 12:
395 DDRD |= (1<<3);
396 PORTD &= ~(1<<3);
397 break;
398 case 13:
399 DDRC |= (1<<6);
400 PORTC &= ~(1<<6);
401 break;
402 }
403 }
404}
405
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