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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 #ifndef HAS_BEEP
  21 #error Please define HAS_BEEP
  22 #endif
  23
  24 #if !HAS_BEEP
  25 #define ao_beep(x)
  26 #endif
  27
  28 static void
  29 ao_panic_delay(uint8_t n)
  30 {
  31         uint8_t i = 0, j = 0;
  32
  33         while (n--)
  34                 while (--j)
  35                         while (--i)
  36                                 _asm nop _endasm;
  37 }
  38
  39 void
  40 ao_panic(uint8_t reason)
  41 {
  42         uint8_t n;
  43
  44         __critical for (;;) {
  45                 ao_panic_delay(20);
  46                 for (n = 0; n < 5; n++) {
  47                         ao_led_on(AO_LED_RED);
  48                         ao_beep(AO_BEEP_HIGH);
  49                         ao_panic_delay(1);
  50                         ao_led_off(AO_LED_RED);
  51                         ao_beep(AO_BEEP_LOW);
  52                         ao_panic_delay(1);
  53                 }
  54                 ao_beep(AO_BEEP_OFF);
  55                 ao_panic_delay(2);
  56 #pragma disable_warning 126
  57                 for (n = 0; n < reason; n++) {
  58                         ao_led_on(AO_LED_RED);
  59                         ao_beep(AO_BEEP_MID);
  60                         ao_panic_delay(10);
  61                         ao_led_off(AO_LED_RED);
  62                         ao_beep(AO_BEEP_OFF);
  63                         ao_panic_delay(10);
  64                 }
  65         }
  66 }