summaryrefslogtreecommitdiffstats
path: root/keyboards/gergo/matrix.c
blob: 655e7293566dc5b259e81990870c5f69461ae2bb (plain)
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
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
/*

Copyright 2013 Oleg Kostyuk <cub.uanic@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 "matrix.h"
#include <stdint.h>
#include <stdbool.h>
#include <avr/io.h>
#include "wait.h"
#include "action_layer.h"
#include "print.h"
#include "debug.h"
#include "util.h"
#include "debounce.h"
#include QMK_KEYBOARD_H

#ifdef BALLER
#include <avr/interrupt.h>
#include "pointing_device.h"
#endif

#ifndef DEBOUNCE
#   define DEBOUNCE	5
#endif

// MCP Pin Defs
#define RROW1 (1u<<3)
#define RROW2 (1u<<2)
#define RROW3 (1u<<1)
#define RROW4 (1u<<0)
#define COL0 (1u<<0)
#define COL1 (1u<<1)
#define COL2 (1u<<2)
#define COL3 (1u<<3)
#define COL4 (1u<<4)
#define COL5 (1u<<5)
#define COL6 (1u<<6)

// ATmega pin defs
#define ROW1  (1u<<6)
#define ROW2  (1u<<5)
#define ROW3  (1u<<4)
#define ROW4  (1u<<1)
#define COL7 (1u<<0)
#define COL8 (1u<<1)
#define COL9 (1u<<2)
#define COL10 (1u<<3)
#define COL11 (1u<<2)
#define COL12 (1u<<3)
#define COL13 (1u<<6)

//Trackball pin defs
#define TRKUP (1u<<4)
#define TRKDN (1u<<5)
#define TRKLT (1u<<6)
#define TRKRT (1u<<7)
#define TRKBTN (1u<<6)


// Multiple for mouse moves
#ifndef TRKSTEP
#define TRKSTEP 20
#endif

// multiple for mouse scroll
#ifndef SCROLLSTEP
#define SCROLLSTEP 5
#endif

// bit masks
#define BMASK     (COL7 | COL8 | COL9 | COL10)
#define CMASK     (COL13)
#define DMASK     (COL11 | COL12)
#define FMASK     (ROW1 | ROW2 | ROW3 | ROW4)
#define RROWMASK  (RROW1 | RROW2 | RROW3 | RROW4)
#define MCPMASK   (COL0 | COL1 | COL2 | COL3 | COL4 | COL5 | COL6)
#define TRKMASK   (TRKUP | TRKDN | TRKRT | TRKLT)

// Trackball interrupts accumulate over here. Processed on scan
// Stores prev state of mouse, high bits store direction
uint8_t trkState    = 0;
uint8_t trkBtnState = 0;

volatile uint8_t tbUpCnt  = 0;
volatile uint8_t tbDnCnt  = 0;
volatile uint8_t tbLtCnt  = 0;
volatile uint8_t tbRtCnt  = 0;

/* matrix state(1:on, 0:off) */
static matrix_row_t matrix[MATRIX_ROWS];
/*
 * matrix state(1:on, 0:off)
 * contains the raw values without debounce filtering of the last read cycle.
 */
static matrix_row_t raw_matrix[MATRIX_ROWS];

// Debouncing: store for each key the number of scans until it's eligible to
// change.  When scanning the matrix, ignore any changes in keys that have
// already changed in the last DEBOUNCE scans.

static matrix_row_t read_cols(uint8_t row);
static void         init_cols(void);
static void         unselect_rows(void);
static void         select_row(uint8_t row);
static void enableInterrupts(void);

static uint8_t mcp23018_reset_loop;
// static uint16_t mcp23018_reset_loop;

__attribute__ ((weak)) void matrix_init_user(void) {}

__attribute__ ((weak)) void matrix_scan_user(void) {}

__attribute__ ((weak))
void matrix_init_kb(void) {
  matrix_init_user();
}

__attribute__ ((weak))
void matrix_scan_kb(void) {
  matrix_scan_user();
}

inline uint8_t matrix_rows(void) { return MATRIX_ROWS; }

inline uint8_t matrix_cols(void) { return MATRIX_COLS; }


void matrix_init(void) {
    // initialize row and col
    mcp23018_status = init_mcp23018();
    unselect_rows();
    init_cols();

  // initialize matrix state: all keys off
  for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
    matrix[i]     = 0;
    raw_matrix[i] = 0;
  }

    debounce_init(MATRIX_ROWS);
    matrix_init_quantum();
}

void matrix_power_up(void) {
    mcp23018_status = init_mcp23018();

    unselect_rows();
    init_cols();

    // initialize matrix state: all keys off
    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
        matrix[i] = 0;
    }
}

// Reads and stores a row, returning
// whether a change occurred.
static inline bool store_raw_matrix_row(uint8_t index) {
  matrix_row_t temp = read_cols(index);
  if (raw_matrix[index] != temp) {
    raw_matrix[index] = temp;
    return true;
  }
  return false;
}



uint8_t matrix_scan(void) {
    // TODO: Find what is trashing interrupts
    enableInterrupts();

    // First we handle the mouse inputs
#ifdef BALLER
    uint8_t pBtn   = PINE & TRKBTN;

    #ifdef DEBUG_BALLER
    // Compare to previous, mod report
    if (tbUpCnt + tbDnCnt + tbLtCnt + tbRtCnt != 0)
        xprintf("U: %d D: %d L: %d R: %d B: %d\n", tbUpCnt, tbDnCnt, tbLtCnt, tbRtCnt, (trkBtnState >> 6));
    #endif

    // Modify the report
    report_mouse_t pRprt = pointing_device_get_report();

    // Scroll by default, move on layer
    if (layer_state == 0) {
		  pRprt.h += tbLtCnt * SCROLLSTEP; tbLtCnt = 0;
		  pRprt.h -= tbRtCnt * SCROLLSTEP; tbRtCnt = 0;
		  pRprt.v -= tbUpCnt * SCROLLSTEP; tbUpCnt = 0;
		  pRprt.v += tbDnCnt * SCROLLSTEP; tbDnCnt = 0;
    } else {
		  pRprt.x -= tbLtCnt * TRKSTEP * (layer_state - 1); tbLtCnt = 0;
		  pRprt.x += tbRtCnt * TRKSTEP * (layer_state - 1); tbRtCnt = 0;
		  pRprt.y -= tbUpCnt * TRKSTEP * (layer_state - 1); tbUpCnt = 0;
		  pRprt.y += tbDnCnt * TRKSTEP * (layer_state - 1); tbDnCnt = 0;
    }

#ifdef DEBUG_BALLER
    if (pRprt.x != 0 || pRprt.y != 0)
        xprintf("X: %d Y: %d\n", pRprt.x, pRprt.y);
#endif

    if ((pBtn != trkBtnState) && ((pBtn >> 6) == 0))  pRprt.buttons |= MOUSE_BTN1;
    if ((pBtn != trkBtnState) && ((pBtn >> 6) == 1))  pRprt.buttons &= ~MOUSE_BTN1;

    // Save state, push update
    if (pRprt.x != 0 || pRprt.y != 0 || pRprt.h != 0 || pRprt.v != 0 || (trkBtnState != pBtn))
        pointing_device_set_report(pRprt);

    trkBtnState = pBtn;
#endif

    // Then the keyboard
    if (mcp23018_status) {  // if there was an error
        if (++mcp23018_reset_loop == 0) {
            // if (++mcp23018_reset_loop >= 1300) {
            // since mcp23018_reset_loop is 8 bit - we'll try to reset once in 255 matrix scans
            // this will be approx bit more frequent than once per second
            print("trying to reset mcp23018\n");
            mcp23018_status = init_mcp23018();
            if (mcp23018_status) {
                print("left side not responding\n");
            } else {
                print("left side attached\n");
            }
        }
    }

    bool changed = false;
    for (uint8_t i = 0; i < MATRIX_ROWS_PER_SIDE; i++) {
        // select rows from left and right hands
        uint8_t left_index = i;
        uint8_t right_index = i + MATRIX_ROWS_PER_SIDE;
        select_row(left_index);
        select_row(right_index);

        // we don't need a 30us delay anymore, because selecting a
        // left-hand row requires more than 30us for i2c.

        changed |= store_raw_matrix_row(left_index);
        changed |= store_raw_matrix_row(right_index);

        unselect_rows();
    }

    debounce(raw_matrix, matrix, MATRIX_ROWS, changed);
    matrix_scan_quantum();

    enableInterrupts();

#ifdef DEBUG_MATRIX
    for (uint8_t c = 0; c < MATRIX_COLS; c++)
		for (uint8_t r = 0; r < MATRIX_ROWS; r++)
		  if (matrix_is_on(r, c)) xprintf("r:%d c:%d \n", r, c);
#endif

    return 1;
}

bool matrix_is_modified(void) // deprecated and evidently not called.
{
    return true;
}

inline bool matrix_is_on(uint8_t row, uint8_t col) { return (matrix[row] & ((matrix_row_t)1 << col)); }

inline matrix_row_t matrix_get_row(uint8_t row) { return matrix[row]; }

void matrix_print(void) {
    print("\nr/c 0123456789ABCDEF\n");
    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
        print_hex8(row); print(": ");
        print_bin_reverse16(matrix_get_row(row));
        print("\n");
    }
}

uint8_t matrix_key_count(void) {
    uint8_t count = 0;
    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
        count += bitpop16(matrix[i]);
    }
    return count;
}

// Remember this means ROWS
static void  init_cols(void) {
    // init on mcp23018
    // not needed, already done as part of init_mcp23018()

    // Input with pull-up(DDR:0, PORT:1)
    DDRF  &= ~FMASK;
    PORTF |=  FMASK;
}

static matrix_row_t read_cols(uint8_t row) {
    if (row < 7) {
        if (mcp23018_status) { // if there was an error
            return 0;
        } else {
            uint8_t data = 0;
            mcp23018_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT);    if (mcp23018_status) goto out;
            mcp23018_status = i2c_write(GPIOB, I2C_TIMEOUT);             if (mcp23018_status) goto out;
            mcp23018_status = i2c_start(I2C_ADDR_READ, I2C_TIMEOUT);     if (mcp23018_status) goto out;
            mcp23018_status = i2c_read_nack(I2C_TIMEOUT);                if (mcp23018_status < 0) goto out;
            data = ~((uint8_t)mcp23018_status);
            mcp23018_status = I2C_STATUS_SUCCESS;
        out:
            i2c_stop();

#ifdef DEBUG_MATRIX
            if (data != 0x00) xprintf("I2C: %d\n", data);
#endif
            return data;
        }
    } else {
         /* read from teensy
	        * bitmask is 0b0111001, but we want the lower four
	        * we'll return 1s for the top two, but that's harmless.
	        */
        // So I need to confuckulate all this
        //return ~(((PIND & DMASK) >> 1  | ((PINC & CMASK) >> 6) | (PIN)));
        //return ~((PINF & 0x03) | ((PINF & 0xF0) >> 2));
        return ~(
           (((PINF & ROW4) >> 1)
          | ((PINF & (ROW1 | ROW2 | ROW3)) >> 3))
        & 0xF);
    }
}

// Row pin configuration
static void unselect_rows(void)
{
    // no need to unselect on mcp23018, because the select step sets all
    // the other row bits high, and it's not changing to a different
    // direction
    // Hi-Z(DDR:0, PORT:0) to unselect
    DDRB  &= ~(BMASK | TRKMASK);
    PORTB &= ~(BMASK);
    DDRC  &= ~CMASK;
    PORTC &= ~CMASK;
    DDRD  &= ~DMASK;
    PORTD &= ~DMASK;

	// Fix trashing of DDRB for TB
    PORTB |= TRKMASK;
}

static void select_row(uint8_t row)
{
    if (row < 7) {
        // select on mcp23018
        if (mcp23018_status) { // do nothing on error
        } else { // set active row low  : 0 // set other rows hi-Z : 1
            mcp23018_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT);        if (mcp23018_status) goto out;
            mcp23018_status = i2c_write(GPIOA, I2C_TIMEOUT);                 if (mcp23018_status) goto out;
            mcp23018_status = i2c_write(0xFF & ~(1<<row), I2C_TIMEOUT);      if (mcp23018_status) goto out;
        out:
            i2c_stop();
        }
    } else {
        // Output low(DDR:1, PORT:0) to select
        switch (row) {
            case 7:
                DDRB  |= COL7;
                PORTB &= ~COL7;
                break;
            case 8:
                DDRB  |= COL8;
                PORTB &= ~COL8;
                break;
            case 9:
                DDRB  |= COL9;
                PORTB &= ~COL9;
                break;
            case 10:
                DDRB  |= COL10;
                PORTB &= ~COL10;
                break;
            case 11:
                DDRD  |= COL11;
                PORTD &= ~COL11;
                break;
            case 12:
                DDRD  |= COL12;
                PORTD &= ~COL12;
                break;
            case 13:
                DDRC  |= COL13;
                PORTC &= ~COL13;
                break;
        }
    }
}


// Trackball Interrupts
static void enableInterrupts(void) {
    #ifdef BALLER
      // Set interrupt mask
      // Set port defs
      DDRB &= ~TRKMASK;
      PORTB |= TRKMASK;
      DDRE &= ~TRKBTN;
      PORTE |= TRKBTN;

      // Interrupt shenanigans
      //EIMSK |= (1 << PCIE0);
      PCMSK0 |= TRKMASK;
      PCICR |= (1 << PCIE0);
      sei();
    #endif

    return;
}
#ifdef BALLER
ISR (PCINT0_vect) {
  // Don't get fancy, we're in a interrupt here
  // PCINT reports a interrupt for a change on the bus
  // We hand the button at scantime for debounce
  volatile uint8_t pState = PINB & TRKMASK;
  if ((pState & TRKUP) != (trkState & TRKUP)) tbUpCnt++;
  if ((pState & TRKDN) != (trkState & TRKDN)) tbDnCnt++;
  if ((pState & TRKLT) != (trkState & TRKLT)) tbLtCnt++;
  if ((pState & TRKRT) != (trkState & TRKRT)) tbRtCnt++;
  trkState = pState;

}
#endif