aboutsummaryrefslogtreecommitdiffstats
path: root/keyboards/infinity60/led_controller.c
blob: 21f95a9c129c3fda0445cb3cf56c9f1e2631559b (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
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
/*
Copyright 2016 flabbergast <s3+flabbergast@sdfeu.org>

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/>.
*/

/*
 * LED controller code
 * IS31FL3731C matrix LED driver from ISSI
 * datasheet: http://www.issi.com/WW/pdf/31FL3731C.pdf
 */

#include "ch.h"
#include "hal.h"
#include "print.h"
#include "led.h"
#include "host.h"

#include "led_controller.h"

#include "suspend.h"

#include "usb_main.h"

/* Infinity60 LED MAP
    - digits mean "row" and "col", i.e. 45 means C4-5 in the IS31 datasheet, matrix A

  11 12 13 14 15 16 17 18 21 22 23 24 25  26 27*
   28 31 32 33 34 35 36 37 38 41 42 43 44 45
   46 47 48 51 52 53 54 55 56 57 58 61    62
    63 64 65 66 67 68 71 72 73 74 75      76 77*
  78  81  82       83         84  85  86  87

*Unused in Alphabet Layout
*/

/*
  each page has 0xB4 bytes
  0 - 0x11: LED control (on/off):
    order: CA1, CB1, CA2, CB2, .... (CA - matrix A, CB - matrix B)
      CAn controls Cn-8 .. Cn-1 (LSbit)
  0x12 - 0x23: blink control (like "LED control")
  0x24 - 0xB3: PWM control: byte per LED, 0xFF max on
    order same as above (CA 1st row (8bytes), CB 1st row (8bytes), ...)
*/

// Which LED should be used for CAPS LOCK indicator
#if !defined(CAPS_LOCK_LED_ADDRESS)
#define CAPS_LOCK_LED_ADDRESS 46
#endif

#if !defined(NUM_LOCK_LED_ADDRESS)
#define NUM_LOCK_LED_ADDRESS 85
#endif

/* Which LED should breathe during sleep */
#if !defined(BREATHE_LED_ADDRESS)
#define BREATHE_LED_ADDRESS CAPS_LOCK_LED_ADDRESS
#endif

/* =================
 * ChibiOS I2C setup
 * ================= */
static const I2CConfig i2ccfg = {
  400000 // clock speed (Hz); 400kHz max for IS31
};

/* ==============
 *   variables
 * ============== */
// internal communication buffers
uint8_t tx[2] __attribute__((aligned(2)));
uint8_t rx[1] __attribute__((aligned(2)));

// buffer for sending the whole page at once (used also as a temp buffer)
uint8_t full_page[0xB4+1] = {0};

// LED mask (which LEDs are present, selected by bits)
// IC60 pcb uses only CA matrix.
// Each byte is a control pin for 8 leds ordered 8-1
const uint8_t all_on_leds_mask[0x12] = {
  0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
  0x00, 0xFF, 0x00, 0xFF, 0x00, 0x7F, 0x00, 0x00, 0x00
};

// array to hold brightness pwm steps
const uint8_t pwm_levels[5] = {
    0x00, 0x16, 0x4E, 0xA1, 0xFF
};

// array to write to pwm register
uint8_t pwm_register_array[9] = {0};


/* ============================
 *   communication functions
 * ============================ */
msg_t is31_select_page(uint8_t page) {
  tx[0] = IS31_COMMANDREGISTER;
  tx[1] = page;
  return i2cMasterTransmitTimeout(&I2CD1, IS31_ADDR_DEFAULT, tx, 2, NULL, 0, US2ST(IS31_TIMEOUT));
}

msg_t is31_write_data(uint8_t page, uint8_t *buffer, uint8_t size) {
  is31_select_page(page);
  return i2cMasterTransmitTimeout(&I2CD1, IS31_ADDR_DEFAULT, buffer, size, NULL, 0, US2ST(IS31_TIMEOUT));
}

msg_t is31_write_register(uint8_t page, uint8_t reg, uint8_t data) {
  is31_select_page(page);
  tx[0] = reg;
  tx[1] = data;
  return i2cMasterTransmitTimeout(&I2CD1, IS31_ADDR_DEFAULT, tx, 2, NULL, 0, US2ST(IS31_TIMEOUT));
}

msg_t is31_read_register(uint8_t page, uint8_t reg, uint8_t *result) {
  is31_select_page(page);

  tx[0] = reg;
  return i2cMasterTransmitTimeout(&I2CD1, IS31_ADDR_DEFAULT, tx, 1, result, 1, US2ST(IS31_TIMEOUT));
}

/* ========================
 * initialise the IS31 chip
 * ======================== */
void is31_init(void) {
  // just to be sure that it's all zeroes
  __builtin_memset(full_page,0,0xB4+1);
  // zero function page, all registers (assuming full_page is all zeroes)
  is31_write_data(IS31_FUNCTIONREG, full_page, 0xD + 1);
  // disable hardware shutdown
  palSetPadMode(GPIOB, 16, PAL_MODE_OUTPUT_PUSHPULL);
  palSetPad(GPIOB, 16);
  chThdSleepMilliseconds(10);
  // software shutdown
  is31_write_register(IS31_FUNCTIONREG, IS31_REG_SHUTDOWN, IS31_REG_SHUTDOWN_ON);
  chThdSleepMilliseconds(10);
  // zero function page, all registers
  is31_write_data(IS31_FUNCTIONREG, full_page, 0xD + 1);
  chThdSleepMilliseconds(10);
  // software shutdown disable (i.e. turn stuff on)
  is31_write_register(IS31_FUNCTIONREG, IS31_REG_SHUTDOWN, IS31_REG_SHUTDOWN_OFF);
  chThdSleepMilliseconds(10);
  // zero all LED registers on all 8 pages
  uint8_t i;
  for(i=0; i<8; i++) {
    is31_write_data(i, full_page, 0xB4 + 1);
    chThdSleepMilliseconds(5);
  }
}

/* ==================
 * LED control thread
 * ================== */
#define LED_MAILBOX_NUM_MSGS 5
static msg_t led_mailbox_queue[LED_MAILBOX_NUM_MSGS];
mailbox_t led_mailbox;
static THD_WORKING_AREA(waLEDthread, 256);
static THD_FUNCTION(LEDthread, arg) {
  (void)arg;
  chRegSetThreadName("LEDthread");

  uint8_t i;
  uint8_t control_register_word[2] = {0};//2 bytes: register address, byte to write
  uint8_t led_control_reg[0x13] = {0};//led control register start address + 0x12 bytes

  //persistent status variables
  uint8_t pwm_step_status, page_status, capslock_status, numlock_status;

  //mailbox variables
  uint8_t temp, msg_type;
  uint8_t msg_args[3];
  msg_t msg;

  // initialize persistent variables
  pwm_step_status = 4; //full brightness
  page_status = 0; //start frame 0 (all off/on)
  numlock_status = (host_keyboard_leds() & (1<<USB_LED_NUM_LOCK)) ? 1 : 0;
  capslock_status = (host_keyboard_leds() & (1<<USB_LED_CAPS_LOCK)) ? 1 : 0;

  while(true) {
    // wait for a message (asynchronous)
    // (messages are queued (up to LED_MAILBOX_NUM_MSGS) if they can't
    //  be processed right away
    chMBFetch(&led_mailbox, &msg, TIME_INFINITE);
    msg_type = msg & 0xFF; //first byte is action information
    msg_args[0] = (msg >> 8) & 0xFF;
    msg_args[1] = (msg >> 16) & 0XFF;
    msg_args[2] = (msg >> 24) & 0xFF;


    switch (msg_type){
      case SET_FULL_ROW:
      //write full byte to pin address, msg_args[1] = pin #, msg_args[0] = 8 bits to write
      //writes only to currently displayed page
        write_led_byte(page_status, msg_args[1], msg_args[0]);
        break;

      case OFF_LED:
      //on/off/toggle single led, msg_args[0] = row/col of led, msg_args[1] = page
        set_led_bit(msg_args[1], control_register_word, msg_args[0], 0);
        break;
      case ON_LED:
        set_led_bit(msg_args[1], control_register_word, msg_args[0], 1);
        break;
      case TOGGLE_LED:
        set_led_bit(msg_args[1], control_register_word, msg_args[0], 2);
        break;

      case BLINK_OFF_LED:
      //on/off/toggle single led, msg_args[0] = row/col of led
        set_led_bit(msg_args[1], control_register_word, msg_args[0], 4);
        break;
      case BLINK_ON_LED:
        set_led_bit(msg_args[1], control_register_word, msg_args[0], 5);
        break;
      case BLINK_TOGGLE_LED:
        set_led_bit(msg_args[1], control_register_word, msg_args[0], 6);
        break;

      case TOGGLE_ALL:
      //turn on/off all leds, msg_args = unused
        is31_write_register(IS31_FUNCTIONREG, IS31_REG_SHUTDOWN, IS31_REG_SHUTDOWN_ON);
        chThdSleepMilliseconds(5);
        is31_read_register(0, 0x00, &temp);
        is31_write_register(IS31_FUNCTIONREG, IS31_REG_SHUTDOWN, IS31_REG_SHUTDOWN_OFF);

        led_control_reg[0] = 0;

        //toggle led mask based on current state (temp)
        if (temp==0 || page_status > 0) {
          __builtin_memcpy(led_control_reg+1, all_on_leds_mask, 0x12);
        } else {
          __builtin_memset(led_control_reg+1, 0, 0x12);
        }
        is31_write_data(0, led_control_reg, 0x13);

        if (page_status > 0) {
          is31_write_register(IS31_FUNCTIONREG, IS31_REG_PICTDISP, 0);

          page_status=0;

          //maintain lock leds, reset to off and force recheck to blink of all leds toggled on
          numlock_status = 0;
          capslock_status = 0;
          led_set(host_keyboard_leds());
        }
        break;

      case TOGGLE_BACKLIGHT:
        //msg_args[0] = on/off

        //populate 9 byte rows to be written to each pin, first byte is register (pin) address
        if (msg_args[0] == 1) {
          __builtin_memset(pwm_register_array+1, pwm_levels[pwm_step_status], 8);
        } else {
          __builtin_memset(pwm_register_array+1, 0, 8);
        }

        for(i=0; i<8; i++) {
        //first byte is register address, every 0x10 9 bytes is A-matrix pwm pins
          pwm_register_array[0] = 0x24 + (i * 0x10);
          is31_write_data(0,pwm_register_array,9);
        }
        break;

      case DISPLAY_PAGE:
      //msg_args[0] = page to toggle on
        if (page_status != msg_args[0]) {
          is31_write_register(IS31_FUNCTIONREG, IS31_REG_PICTDISP, msg_args[0]);
          page_status = msg_args[0];

          //maintain lock leds, reset to off and force recheck for new page
          numlock_status = 0;
          capslock_status = 0;
          led_set(host_keyboard_leds());
        }
        break;

      case RESET_PAGE:
      //led_args[0] = page to reset
        led_control_reg[0] = 0;
        __builtin_memset(led_control_reg+1, 0, 0x12);
        is31_write_data(msg_args[0], led_control_reg, 0x13);

        //repeat for blink register
        led_control_reg[0] = 0x12;
        is31_write_data(msg_args[0], led_control_reg, 0x13);
        break;

      case TOGGLE_NUM_LOCK:
      //msg_args[0] = 0 or 1, off/on
        if (numlock_status != msg_args[0]) {
          set_lock_leds(NUM_LOCK_LED_ADDRESS, msg_args[0], page_status);
          numlock_status = msg_args[0];
        }
        break;
      case TOGGLE_CAPS_LOCK:
      //msg_args[0] = 0 or 1, off/on
        if (capslock_status != msg_args[0]) {
          set_lock_leds(CAPS_LOCK_LED_ADDRESS, msg_args[0], page_status);
          capslock_status = msg_args[0];
        }
        break;

      case STEP_BRIGHTNESS:
      //led_args[0] = step up (1) or down (0)
        switch (msg_args[0]) {
          case 0:
            if (pwm_step_status == 0) {
              pwm_step_status = 4;
            } else {
              pwm_step_status--;
            }
            break;

          case 1:
            if (pwm_step_status == 4) {
              pwm_step_status = 0;
            } else {
              pwm_step_status++;
            }
            break;
        }

        //populate 8 byte arrays to write on each pin
        //first byte is register address, every 0x10 9 bytes are A-matrix pwm pins
        __builtin_memset(pwm_register_array+1, pwm_levels[pwm_step_status], 8);

        for(i=0; i<8; i++) {
          pwm_register_array[0] = 0x24 + (i * 0x10);
          is31_write_data(0,pwm_register_array,9);
        }
        break;
    }
  }
}

/* ==============================
 *    led processing functions
 * ============================== */

void set_led_bit (uint8_t page, uint8_t *led_control_word, uint8_t led_addr, uint8_t action) {
  //returns 2 bytes: led control register address and byte to write
  //action: 0 - off, 1 - on, 2 - toggle, 4 - blink on, 5 - blink off, 6 - toggle blink

  uint8_t control_reg_addr, column_bit, column_byte, temp, blink_bit;

  //check for valid led address
  if (led_addr < 0 || led_addr > 87 || led_addr % 10 > 8) {
    return;
  }

  blink_bit = action>>2;//check for blink bit
  action &= ~(1<<2); //strip blink bit

  //led_addr tens column is pin#, ones column is bit position in 8-bit mask
  control_reg_addr = ((led_addr / 10) % 10 - 1 ) * 0x02;// A-matrix is every other byte
  control_reg_addr += blink_bit == 1 ? 0x12 : 0x00;//if blink_bit, shift 12 bytes to blink register

  is31_write_register(IS31_FUNCTIONREG, IS31_REG_SHUTDOWN, IS31_REG_SHUTDOWN_ON);
  chThdSleepMilliseconds(5);
  is31_read_register(page, control_reg_addr, &temp);//maintain status of leds on this byte
  is31_write_register(IS31_FUNCTIONREG, IS31_REG_SHUTDOWN, IS31_REG_SHUTDOWN_OFF);

  column_bit = 1<<(led_addr % 10 - 1);
  column_byte = temp;

  switch(action) {
    case 0:
      column_byte &= ~column_bit;
      break;
    case 1:
      column_byte |= column_bit;
      break;
    case 2:
      column_byte ^= column_bit;
      break;
  }

  //return word to be written in register
  led_control_word[0] = control_reg_addr;
  led_control_word[1] = column_byte;
  is31_write_data (page, led_control_word, 0x02);
}

void write_led_byte (uint8_t page, uint8_t row, uint8_t led_byte) {
  uint8_t led_control_word[2] = {0};//register address and on/off byte

  led_control_word[0] = (row - 1 ) * 0x02;// A-matrix is every other byte
  led_control_word[1] = led_byte;
  is31_write_data(page, led_control_word, 0x02);
}

void write_led_page (uint8_t page, uint8_t *user_led_array, uint8_t led_count) {
  uint8_t i;
  uint8_t pin, col;
  uint8_t led_control_register[0x13] = {0};

  __builtin_memset(led_control_register,0,13);

  for(i=0;i<led_count;i++){
    //shift pin by 1 for led register 0x00 address
    pin = ((user_led_array[i] / 10) % 10 - 1 ) * 2 + 1;
    col = user_led_array[i] % 10 - 1;
    led_control_register[pin] |= 1<<(col);
  }

  is31_write_data(page, led_control_register, 0x13);
}

void set_lock_leds(uint8_t led_addr, uint8_t led_action, uint8_t page) {
  uint8_t temp;
  uint8_t led_control_word[2] = {0};

  //blink if all leds are on
  if (page == 0) {
    is31_write_register(IS31_FUNCTIONREG, IS31_REG_SHUTDOWN, IS31_REG_SHUTDOWN_ON);
    chThdSleepMilliseconds(5);
    is31_read_register(0, 0x00, &temp);
    is31_write_register(IS31_FUNCTIONREG, IS31_REG_SHUTDOWN, IS31_REG_SHUTDOWN_OFF);

    if (temp == 0xFF) {
      led_action |= (1<<2); //set blink bit
    }
  }

  set_led_bit(page,led_control_word,led_addr,led_action);
}

/* =====================
 * hook into user keymap
 * ===================== */
void led_controller_init(void) {
  uint8_t i;

  /* initialise I2C */
  /* I2C pins */
  palSetPadMode(GPIOB, 0, PAL_MODE_ALTERNATIVE_2); // PTB0/I2C0/SCL
  palSetPadMode(GPIOB, 1, PAL_MODE_ALTERNATIVE_2); // PTB1/I2C0/SDA
  /* start I2C */
  i2cStart(&I2CD1, &i2ccfg);
  // try high drive (from kiibohd)
  I2CD1.i2c->C2 |= I2Cx_C2_HDRS;
  // try glitch fixing (from kiibohd)
  I2CD1.i2c->FLT = 4;

  chThdSleepMilliseconds(10);

  /* initialise IS31 chip */
  is31_init();

  //set Display Option Register so all pwm intensity is controlled from page 0
  //enable blink and set blink period to 0.27s x rate
  is31_write_register(IS31_FUNCTIONREG, IS31_REG_DISPLAYOPT, IS31_REG_DISPLAYOPT_INTENSITY_SAME + IS31_REG_DISPLAYOPT_BLINK_ENABLE + 4);

  /* set full pwm on page 1 */
  pwm_register_array[0] = 0;
  __builtin_memset(pwm_register_array+1, 0xFF, 8);
  for(i=0; i<8; i++) {
    pwm_register_array[0] = 0x24 + (i * 0x10);//first byte of 9 bytes must be register address
    is31_write_data(0, pwm_register_array, 9);
    chThdSleepMilliseconds(5);
  }

  /* enable breathing when the displayed page changes */
  // Fade-in Fade-out, time = 26ms * 2^N, N=3
  is31_write_register(IS31_FUNCTIONREG, IS31_REG_BREATHCTRL1, (3<<4)|3);
  is31_write_register(IS31_FUNCTIONREG, IS31_REG_BREATHCTRL2, IS31_REG_BREATHCTRL2_ENABLE|3);

  /* more time consuming LED processing should be offloaded into
   * a thread, with asynchronous messaging. */
  chMBObjectInit(&led_mailbox, led_mailbox_queue, LED_MAILBOX_NUM_MSGS);
  chThdCreateStatic(waLEDthread, sizeof(waLEDthread), LOWPRIO, LEDthread, NULL);
}