git.gag.com Git - fw/altos/blob - src/drivers/ao_lco_bits.c

   1 /*
   2  * Copyright © 2018 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  */
  14
  15 #include <ao.h>
  16 #include <ao_lco.h>
  17 #include <ao_radio_cmac.h>
  18
  19 uint8_t         ao_lco_debug;
  20
  21 uint8_t         ao_lco_pad;
  22 int16_t         ao_lco_box;
  23
  24 uint8_t         ao_lco_armed;                                   /* arm active */
  25 uint8_t         ao_lco_firing;                                  /* fire active */
  26
  27 int16_t         ao_lco_min_box, ao_lco_max_box;
  28
  29 uint8_t         ao_lco_pretending;
  30
  31 #if AO_LCO_DRAG
  32 uint8_t         ao_lco_drag_race;
  33 #endif
  34
  35 struct ao_pad_query     ao_pad_query;                           /* latest query response */
  36
  37 static uint8_t          ao_lco_channels[AO_PAD_MAX_BOXES];      /* pad channels available on each box */
  38 static uint16_t         ao_lco_tick_offset[AO_PAD_MAX_BOXES];   /* 16 bit offset from local to remote tick count */
  39 static uint8_t          ao_lco_selected[AO_PAD_MAX_BOXES];      /* pads selected to fire */
  40
  41 #define AO_LCO_VALID_LAST       1
  42 #define AO_LCO_VALID_EVER       2
  43
  44 static uint8_t          ao_lco_valid[AO_PAD_MAX_BOXES];         /* AO_LCO_VALID bits per box */
  45
  46 static const AO_LED_TYPE        continuity_led[AO_LED_CONTINUITY_NUM] = {
  47 #ifdef AO_LED_CONTINUITY_0
  48         AO_LED_CONTINUITY_0,
  49 #endif
  50 #ifdef AO_LED_CONTINUITY_1
  51         AO_LED_CONTINUITY_1,
  52 #endif
  53 #ifdef AO_LED_CONTINUITY_2
  54         AO_LED_CONTINUITY_2,
  55 #endif
  56 #ifdef AO_LED_CONTINUITY_3
  57         AO_LED_CONTINUITY_3,
  58 #endif
  59 #ifdef AO_LED_CONTINUITY_4
  60         AO_LED_CONTINUITY_4,
  61 #endif
  62 #ifdef AO_LED_CONTINUITY_5
  63         AO_LED_CONTINUITY_5,
  64 #endif
  65 #ifdef AO_LED_CONTINUITY_6
  66         AO_LED_CONTINUITY_6,
  67 #endif
  68 #ifdef AO_LED_CONTINUITY_7
  69         AO_LED_CONTINUITY_7,
  70 #endif
  71 };
  72
  73 /* Set LEDs to match remote box status */
  74 void
  75 ao_lco_igniter_status(void)
  76 {
  77         uint8_t         c;
  78         uint8_t         t = 0;
  79
  80         for (;;) {
  81 #if AO_LCO_DRAG
  82                 if (ao_lco_drag_race)
  83                         ao_sleep_for(&ao_pad_query, AO_MS_TO_TICKS(50));
  84                 else
  85 #endif
  86                         ao_sleep(&ao_pad_query);
  87                 if (ao_lco_box_pseudo(ao_lco_box)) {
  88                         ao_led_off(AO_LED_GREEN|AO_LED_AMBER|AO_LED_RED);
  89                         continue;
  90                 }
  91                 PRINTD("RSSI %d VALID %d\n", ao_radio_cmac_rssi, ao_lco_valid[ao_lco_box]);
  92                 if (!(ao_lco_valid[ao_lco_box] & AO_LCO_VALID_LAST)) {
  93                         ao_led_on(AO_LED_RED);
  94                         ao_led_off(AO_LED_GREEN|AO_LED_AMBER);
  95                         continue;
  96                 }
  97                 if (ao_radio_cmac_rssi < -90) {
  98                         ao_led_on(AO_LED_AMBER);
  99                         ao_led_off(AO_LED_RED|AO_LED_GREEN);
 100                 } else {
 101                         ao_led_on(AO_LED_GREEN);
 102                         ao_led_off(AO_LED_RED|AO_LED_AMBER);
 103                 }
 104                 if (ao_pad_query.arm_status)
 105                         ao_led_on(AO_LED_REMOTE_ARM);
 106                 else
 107                         ao_led_off(AO_LED_REMOTE_ARM);
 108
 109                 for (c = 0; c < AO_LED_CONTINUITY_NUM; c++) {
 110                         uint8_t status;
 111
 112                         if (ao_pad_query.channels & (1 << c))
 113                                 status = ao_pad_query.igniter_status[c];
 114                         else
 115                                 status = AO_PAD_IGNITER_STATUS_NO_IGNITER_RELAY_OPEN;
 116
 117 #if AO_LCO_DRAG
 118                         if (ao_lco_drag_race && (ao_lco_selected[ao_lco_box] & (1 << c))) {
 119                                 uint8_t on = 0;
 120                                 if (status == AO_PAD_IGNITER_STATUS_GOOD_IGNITER_RELAY_OPEN) {
 121                                         if (t)
 122                                                 on = 1;
 123                                 } else {
 124                                         if (t == 1)
 125                                                 on = 1;
 126                                 }
 127                                 if (on)
 128                                         ao_led_on(continuity_led[c]);
 129                                 else
 130                                         ao_led_off(continuity_led[c]);
 131                         } else
 132 #endif
 133                         {
 134                                 if (status == AO_PAD_IGNITER_STATUS_GOOD_IGNITER_RELAY_OPEN)
 135                                         ao_led_on(continuity_led[c]);
 136                                 else
 137                                         ao_led_off(continuity_led[c]);
 138                         }
 139                 }
 140                 t = (t + 1) & 3;
 141         }
 142 }
 143
 144 uint8_t
 145 ao_lco_pad_present(int16_t box, uint8_t pad)
 146 {
 147         /* voltage measurement is always valid */
 148         if (pad == AO_LCO_PAD_VOLTAGE)
 149                 return 1;
 150         if (!ao_lco_channels[box])
 151                 return 0;
 152         if (pad > AO_PAD_MAX_CHANNELS)
 153                 return 0;
 154         return (ao_lco_channels[box] >> (pad - 1)) & 1;
 155 }
 156
 157 uint8_t
 158 ao_lco_pad_first(int16_t box)
 159 {
 160         uint8_t pad;
 161
 162         for (pad = 1; pad <= AO_PAD_MAX_CHANNELS; pad++)
 163                 if (ao_lco_pad_present(box, pad))
 164                         return pad;
 165         return 0;
 166 }
 167
 168 static uint8_t
 169 ao_lco_get_channels(int16_t box, struct ao_pad_query *query)
 170 {
 171         int8_t                  r;
 172
 173         r = ao_lco_query((uint16_t) box, query, &ao_lco_tick_offset[box]);
 174         if (r == AO_RADIO_CMAC_OK) {
 175                 ao_lco_channels[box] = query->channels;
 176                 ao_lco_valid[box] = AO_LCO_VALID_LAST | AO_LCO_VALID_EVER;
 177         } else
 178                 ao_lco_valid[box] &= (uint8_t) ~AO_LCO_VALID_LAST;
 179         PRINTD("ao_lco_get_channels(%d) rssi %d valid %d ret %d offset %d\n", box, ao_radio_cmac_rssi, ao_lco_valid[box], r, ao_lco_tick_offset[box]);
 180         ao_wakeup(&ao_pad_query);
 181         return ao_lco_valid[box];
 182 }
 183
 184 void
 185 ao_lco_update(void)
 186 {
 187         if (ao_lco_box_pseudo(ao_lco_box)) {
 188                 ao_lco_show();
 189                 return;
 190         }
 191
 192         uint8_t previous_valid = ao_lco_valid[ao_lco_box];
 193
 194         if (ao_lco_get_channels(ao_lco_box, &ao_pad_query) & AO_LCO_VALID_LAST) {
 195                 if (!(previous_valid & AO_LCO_VALID_EVER)) {
 196                         if (ao_lco_pad != AO_LCO_PAD_VOLTAGE)
 197                                 ao_lco_set_pad(ao_lco_pad_first(ao_lco_box));
 198                 }
 199                 if (ao_lco_pad == AO_LCO_PAD_VOLTAGE)
 200                         ao_lco_show();
 201         }
 202 }
 203
 204 uint8_t ao_lco_box_mask[AO_LCO_MASK_SIZE(AO_PAD_MAX_BOXES)];
 205
 206 static void
 207 ao_lco_box_reset_present(void)
 208 {
 209         ao_lco_min_box = 0xff;
 210         ao_lco_max_box = 0x00;
 211         ao_lco_pretending = 0;
 212         memset(ao_lco_box_mask, 0, sizeof (ao_lco_box_mask));
 213 }
 214
 215 static void
 216 ao_lco_box_set_present(int16_t box)
 217 {
 218         if (box < ao_lco_min_box)
 219                 ao_lco_min_box = box;
 220         if (box > ao_lco_max_box)
 221                 ao_lco_max_box = box;
 222         if (box >= AO_PAD_MAX_BOXES)
 223                 return;
 224         ao_lco_box_mask[AO_LCO_MASK_ID(box)] |= (uint8_t) (1 << AO_LCO_MASK_SHIFT(box));
 225 }
 226
 227 void
 228 ao_lco_set_pad(uint8_t new_pad)
 229 {
 230         ao_lco_pad = new_pad;
 231         ao_lco_show();
 232 }
 233
 234 void
 235 ao_lco_set_box(int16_t new_box)
 236 {
 237         ao_lco_box = new_box;
 238         if (!ao_lco_box_pseudo(ao_lco_box)) {
 239                 if (ao_lco_box < AO_PAD_MAX_BOXES) {
 240                         if (ao_lco_pretending)
 241                                 ao_lco_channels[ao_lco_box] = 0xff;
 242                         else
 243                                 ao_lco_channels[ao_lco_box] = 0;
 244                 }
 245         }
 246         ao_lco_pad = 1;
 247         ao_lco_show();
 248 }
 249
 250 void
 251 ao_lco_step_pad(int8_t dir)
 252 {
 253         int16_t new_pad;
 254
 255         switch (ao_lco_box) {
 256 #ifdef AO_LCO_HAS_CONTRAST
 257         case AO_LCO_CONTRAST: {
 258                 int32_t contrast = ao_lco_get_contrast();
 259
 260                 contrast = (contrast + AO_LCO_CONTRAST_STEP - 1) / AO_LCO_CONTRAST_STEP;
 261                 contrast += dir;
 262                 contrast *= AO_LCO_CONTRAST_STEP;
 263                 if (contrast < AO_LCO_MIN_CONTRAST)
 264                         contrast = AO_LCO_MIN_CONTRAST;
 265                 if (contrast > AO_LCO_MAX_CONTRAST)
 266                         contrast = AO_LCO_MAX_CONTRAST;
 267                 ao_lco_set_contrast(contrast);
 268                 ao_lco_show();
 269                 break;
 270         }
 271 #endif
 272 #ifdef AO_LCO_HAS_BACKLIGHT
 273         case AO_LCO_BACKLIGHT: {
 274                 int32_t backlight = ao_lco_get_backlight();
 275
 276                 backlight = (backlight + AO_LCO_BACKLIGHT_STEP - 1) / AO_LCO_BACKLIGHT_STEP;
 277                 backlight += dir;
 278                 backlight *= AO_LCO_BACKLIGHT_STEP;
 279                 if (backlight < AO_LCO_MIN_BACKLIGHT)
 280                         backlight = AO_LCO_MIN_BACKLIGHT;
 281                 if (backlight > AO_LCO_MAX_BACKLIGHT)
 282                         backlight = AO_LCO_MAX_BACKLIGHT;
 283                 ao_lco_set_backlight(backlight);
 284                 ao_lco_show();
 285                 break;
 286         }
 287 #endif
 288 #ifdef AO_LCO_HAS_INFO
 289         case AO_LCO_INFO: {
 290 #if AO_LCO_MIN_INFO_PAGE < AO_LCO_MAX_INFO_PAGE
 291                 int32_t info_page = ao_lco_get_info_page();
 292
 293                 info += dir;
 294                 if (info_page < AO_LCO_MIN_INFO_PAGE)
 295                         info_page = AO_LCO_MIN_INFO_PAGE;
 296                 if (info_page > AO_LCO_MAX_INFO_PAGE)
 297                         info_page = AO_LCO_MAX_INFO_PAGE;
 298                 ao_lco_set_info_page();
 299 #endif
 300                 break;
 301         }
 302 #endif
 303         default:
 304                 new_pad = (int16_t) ao_lco_pad;
 305                 do {
 306                         new_pad += dir;
 307                         if (new_pad > AO_PAD_MAX_CHANNELS)
 308                                 new_pad = AO_LCO_PAD_VOLTAGE;
 309                         if (new_pad < 0)
 310                                 new_pad = AO_PAD_MAX_CHANNELS;
 311                         if (new_pad == ao_lco_pad)
 312                                 break;
 313                 } while (!ao_lco_pad_present(ao_lco_box, (uint8_t) new_pad));
 314                 PRINTD("New pad %d\n", new_pad);
 315                 ao_lco_set_pad((uint8_t) new_pad);
 316                 break;
 317         }
 318 }
 319
 320 uint8_t
 321 ao_lco_box_present(int16_t box)
 322 {
 323         if (ao_lco_box_pseudo(box))
 324                 return 1;
 325         if (box >= AO_PAD_MAX_BOXES)
 326                 return 0;
 327         return (ao_lco_box_mask[AO_LCO_MASK_ID(box)] >> AO_LCO_MASK_SHIFT(box)) & 1;
 328 }
 329
 330 void
 331 ao_lco_step_box(int8_t dir)
 332 {
 333         int16_t new_box = ao_lco_box;
 334
 335         do {
 336                 new_box += dir;
 337                 if (new_box > ao_lco_max_box)
 338                         new_box = AO_LCO_BOX_FIRST;
 339                 else if (new_box < AO_LCO_BOX_FIRST)
 340                         new_box = ao_lco_max_box;
 341                 if (new_box == ao_lco_box)
 342                         break;
 343         } while (!ao_lco_box_present(new_box));
 344         PRINTD("New box %d\n", new_box);
 345         ao_lco_set_box(new_box);
 346 }
 347
 348 void
 349 ao_lco_set_armed(uint8_t armed)
 350 {
 351         if (ao_lco_box_pseudo(ao_lco_box))
 352                 return;
 353
 354         ao_lco_armed = armed;
 355         PRINTD("Armed %d\n", ao_lco_armed);
 356         if (ao_lco_armed) {
 357 #if AO_LCO_DRAG
 358                 if (ao_lco_drag_race) {
 359                         int16_t box;
 360
 361                         for (box = ao_lco_min_box; box <= ao_lco_max_box; box++)
 362                                 if (ao_lco_selected[box])
 363                                         break;
 364                         if (box > ao_lco_max_box)
 365                                 ao_lco_armed = 0;
 366                 } else
 367 #endif
 368                 {
 369                         memset(ao_lco_selected, 0, sizeof (ao_lco_selected));
 370                         if (ao_lco_pad != 0)
 371                                 ao_lco_selected[ao_lco_box] = (1 << (ao_lco_pad - 1));
 372                         else
 373                                 ao_lco_armed = 0;
 374                 }
 375         }
 376         ao_wakeup(&ao_lco_armed);
 377 }
 378
 379 void
 380 ao_lco_set_firing(uint8_t firing)
 381 {
 382         ao_lco_firing = firing;
 383         PRINTD("Firing %d\n", ao_lco_firing);
 384         ao_wakeup(&ao_lco_armed);
 385 }
 386
 387 void
 388 ao_lco_search(void)
 389 {
 390         int8_t          r;
 391         int8_t          try;
 392         int16_t         box;
 393         uint16_t        boxes = 0;
 394
 395         ao_lco_box_reset_present();
 396 #ifdef AO_LCO_SEARCH_API
 397         ao_lco_search_start();
 398 #else
 399         ao_lco_show_box(0);
 400         ao_lco_show_pad(0);
 401 #endif
 402         for (box = 0; box < AO_PAD_MAX_BOXES; box++) {
 403 #ifdef AO_LCO_SEARCH_API
 404                 ao_lco_search_box_check(box);
 405 #else
 406                 if ((box % 10) == 0)
 407                         ao_lco_show_box(box);
 408 #endif
 409                 for (try = 0; try < 3; try++) {
 410                         ao_lco_tick_offset[box] = 0;
 411                         r = ao_lco_query((uint16_t) box, &ao_pad_query, &ao_lco_tick_offset[box]);
 412                         PRINTD("box %d result %d offset %d\n", box, r, ao_lco_tick_offset[box]);
 413                         if (r == AO_RADIO_CMAC_OK) {
 414                                 ++boxes;
 415                                 ao_lco_box_set_present(box);
 416 #ifdef AO_LCO_SEARCH_API
 417                                 ao_lco_search_box_present(box);
 418 #else
 419                                 ao_lco_show_pad((uint8_t) (boxes % 10));
 420 #endif
 421                                 ao_delay(AO_MS_TO_TICKS(30));
 422                                 break;
 423                         }
 424                 }
 425         }
 426         if (ao_lco_min_box <= ao_lco_max_box)
 427                 ao_lco_box = ao_lco_min_box;
 428         else
 429                 ao_lco_min_box = ao_lco_max_box = ao_lco_box = 0;
 430         memset(ao_lco_valid, 0, sizeof (ao_lco_valid));
 431         memset(ao_lco_channels, 0, sizeof (ao_lco_channels));
 432 #ifdef AO_LCO_SEARCH_API
 433         ao_lco_search_done();
 434 #endif
 435         ao_lco_set_box(ao_lco_min_box);
 436 }
 437
 438 void
 439 ao_lco_pretend(void)
 440 {
 441         int16_t box;
 442
 443         ao_lco_pretending = 1;
 444         ao_lco_min_box = 1;
 445         ao_lco_max_box = AO_PAD_MAX_BOXES - 1;
 446         for (box = ao_lco_min_box; box <= ao_lco_max_box; box++)
 447                 ao_lco_box_set_present(box);
 448         ao_lco_box = ao_lco_min_box;
 449         memset(ao_lco_valid, 0, sizeof (ao_lco_valid));
 450         memset(ao_lco_channels, 0, sizeof (ao_lco_channels));
 451         ao_lco_set_box(ao_lco_min_box);
 452 }
 453
 454 void
 455 ao_lco_monitor(void)
 456 {
 457         AO_TICK_TYPE    delay;
 458         int16_t         box;
 459
 460         for (;;) {
 461                 PRINTD("monitor armed %d firing %d\n",
 462                        ao_lco_armed, ao_lco_firing);
 463
 464                 if (ao_lco_armed && ao_lco_firing) {
 465                         ao_lco_ignite(AO_PAD_FIRE);
 466                 } else {
 467                         ao_lco_update();
 468                         if (ao_lco_armed) {
 469                                 for (box = ao_lco_min_box; box <= ao_lco_max_box; box++) {
 470                                         if (ao_lco_selected[box]) {
 471                                                 PRINTD("Arming box %d pads %x\n",
 472                                                        box, ao_lco_selected[box]);
 473                                                 if (ao_lco_valid[box] & AO_LCO_VALID_EVER) {
 474                                                         ao_lco_arm((uint16_t) box, ao_lco_selected[box], ao_lco_tick_offset[box]);
 475                                                         ao_delay(AO_MS_TO_TICKS(10));
 476                                                 }
 477                                         }
 478                                 }
 479                         }
 480                 }
 481                 if (ao_lco_armed && ao_lco_firing)
 482                         delay = AO_MS_TO_TICKS(100);
 483                 else
 484                         delay = AO_SEC_TO_TICKS(1);
 485                 ao_sleep_for(&ao_lco_armed, delay);
 486         }
 487 }
 488
 489 #if AO_LCO_DRAG
 490
 491 uint8_t                 ao_lco_drag_beep_count;
 492 static uint8_t          ao_lco_drag_beep_on;
 493 static AO_TICK_TYPE     ao_lco_drag_beep_time;
 494 static AO_TICK_TYPE     ao_lco_drag_warn_time;
 495
 496 #define AO_LCO_DRAG_BEEP_TIME   AO_MS_TO_TICKS(50)
 497 #define AO_LCO_DRAG_WARN_TIME   AO_SEC_TO_TICKS(5)
 498
 499 /* Request 'beeps' additional drag race beeps */
 500 void
 501 ao_lco_drag_add_beeps(uint8_t beeps)
 502 {
 503         PRINTD("beep %d\n", beeps);
 504         if (ao_lco_drag_beep_count == 0)
 505                 ao_lco_drag_beep_time = ao_time();
 506         ao_lco_drag_beep_count += beeps;
 507         ao_wakeup(&ao_lco_drag_beep_count);
 508 }
 509
 510 /* Toggle current pad in drag set */
 511 void
 512 ao_lco_toggle_drag(void)
 513 {
 514         if (ao_lco_drag_race && ao_lco_pad != AO_LCO_PAD_VOLTAGE && !ao_lco_box_pseudo(ao_lco_box)) {
 515                 ao_lco_selected[ao_lco_box] ^= (uint8_t) (1 << (ao_lco_pad - 1));
 516                 PRINTD("Toggle box %d pad %d (pads now %x) to drag race\n",
 517                        ao_lco_pad, ao_lco_box, ao_lco_selected[ao_lco_box]);
 518                 ao_lco_drag_add_beeps(ao_lco_pad);
 519         }
 520 }
 521
 522 /* Check whether it's time to change the beeper status, then either
 523  * turn it on or off as necessary and bump the remaining beep counts
 524  */
 525
 526 AO_TICK_TYPE
 527 ao_lco_drag_beep_check(AO_TICK_TYPE now, AO_TICK_TYPE delay)
 528 {
 529         PRINTD("beep check count %d delta %ld\n",
 530                ao_lco_drag_beep_count,
 531                (long) (AO_TICK_SIGNED) (now - ao_lco_drag_beep_time));
 532         if (ao_lco_drag_beep_count) {
 533                 if ((AO_TICK_SIGNED) (now - ao_lco_drag_beep_time) >= 0) {
 534                         if (ao_lco_drag_beep_on) {
 535                                 ao_beep(0);
 536                                 PRINTD("beep stop\n");
 537                                 ao_lco_drag_beep_on = 0;
 538                                 if (ao_lco_drag_beep_count) {
 539                                         --ao_lco_drag_beep_count;
 540                                         if (ao_lco_drag_beep_count)
 541                                                 ao_lco_drag_beep_time = now + AO_LCO_DRAG_BEEP_TIME;
 542                                 }
 543                         } else {
 544                                 ao_beep(AO_BEEP_HIGH);
 545                                 PRINTD("beep start\n");
 546                                 ao_lco_drag_beep_on = 1;
 547                                 ao_lco_drag_beep_time = now + AO_LCO_DRAG_BEEP_TIME;
 548                         }
 549                 }
 550         }
 551
 552         if (ao_lco_drag_beep_count) {
 553                 AO_TICK_TYPE beep_delay = 0;
 554
 555                 if (ao_lco_drag_beep_time > now)
 556                         beep_delay = ao_lco_drag_beep_time - now;
 557
 558                 if (delay > beep_delay)
 559                         delay = beep_delay;
 560         }
 561         return delay;
 562 }
 563
 564 void
 565 ao_lco_drag_enable(void)
 566 {
 567         if (!ao_lco_drag_race) {
 568                 PRINTD("Drag enable\n");
 569                 ao_lco_drag_race = 1;
 570                 memset(ao_lco_selected, 0, sizeof (ao_lco_selected));
 571 #ifdef AO_LED_DRAG
 572                 ao_led_on(AO_LED_DRAG);
 573 #endif
 574                 ao_lco_drag_add_beeps(5);
 575                 ao_lco_show();
 576         }
 577 }
 578
 579 void
 580 ao_lco_drag_disable(void)
 581 {
 582         if (ao_lco_drag_race) {
 583                 PRINTD("Drag disable\n");
 584                 ao_lco_drag_race = 0;
 585 #ifdef AO_LED_DRAG
 586                 ao_led_off(AO_LED_DRAG);
 587 #endif
 588                 memset(ao_lco_selected, 0, sizeof (ao_lco_selected));
 589                 ao_lco_drag_add_beeps(2);
 590                 ao_lco_show();
 591         }
 592 }
 593
 594 /* add a beep if it's time to warn the user that drag race mode is
 595  * active
 596  */
 597
 598 AO_TICK_TYPE
 599 ao_lco_drag_warn_check(AO_TICK_TYPE now, AO_TICK_TYPE delay)
 600 {
 601         if (ao_lco_drag_race) {
 602                 AO_TICK_TYPE    warn_delay;
 603
 604                 if ((AO_TICK_SIGNED) (now - ao_lco_drag_warn_time) >= 0) {
 605                         ao_lco_drag_add_beeps(1);
 606                         ao_lco_drag_warn_time = now + AO_LCO_DRAG_WARN_TIME;
 607                 }
 608                 warn_delay = ao_lco_drag_warn_time - now;
 609                 if (delay > warn_delay)
 610                         delay = warn_delay;
 611         }
 612         return delay;
 613 }
 614 #endif /* AO_LCO_DRAG */
 615
 616 /* task function for beeping while arm is active */
 617 void
 618 ao_lco_arm_warn(void)
 619 {
 620         for (;;) {
 621                 while (!ao_lco_armed) {
 622 #ifdef AO_LED_FIRE
 623                         ao_led_off(AO_LED_FIRE);
 624 #endif
 625                         ao_sleep(&ao_lco_armed);
 626                 }
 627 #ifdef AO_LED_FIRE
 628                 ao_led_on(AO_LED_FIRE);
 629 #endif
 630                 ao_beep_for(AO_BEEP_MID, AO_MS_TO_TICKS(200));
 631                 ao_delay(AO_MS_TO_TICKS(200));
 632         }
 633 }