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   1 /*
   2  * Copyright © 2009 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; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 #include "ao.h"
  19
  20 static void
  21 ao_panic_delay(uint8_t n)
  22 {
  23         uint8_t i = 0, j = 0;
  24
  25         while (n--)
  26                 while (--j)
  27                         while (--i)
  28                                 _asm nop _endasm;
  29 }
  30
  31 void
  32 ao_panic(uint8_t reason)
  33 {
  34         uint8_t n;
  35
  36         __critical for (;;) {
  37                 ao_panic_delay(20);
  38                 for (n = 0; n < 5; n++) {
  39                         ao_led_on(AO_LED_RED);
  40                         ao_beep(AO_BEEP_HIGH);
  41                         ao_panic_delay(1);
  42                         ao_led_off(AO_LED_RED);
  43                         ao_beep(AO_BEEP_LOW);
  44                         ao_panic_delay(1);
  45                 }
  46                 ao_beep(AO_BEEP_OFF);
  47                 ao_panic_delay(2);
  48 #pragma disable_warning 126
  49                 for (n = 0; n < reason; n++) {
  50                         ao_led_on(AO_LED_RED);
  51                         ao_beep(AO_BEEP_MID);
  52                         ao_panic_delay(10);
  53                         ao_led_off(AO_LED_RED);
  54                         ao_beep(AO_BEEP_OFF);
  55                         ao_panic_delay(10);
  56                 }
  57         }
  58 }