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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 #if !LEDS_AVAILABLE
  28 #define ao_led_on(x)
  29 #define ao_led_off(x)
  30 #endif
  31
  32 static void
  33 ao_panic_delay(uint8_t n)
  34 {
  35         uint8_t i = 0, j = 0;
  36
  37         while (n--)
  38                 while (--j)
  39                         while (--i)
  40                                 ao_arch_nop();
  41 }
  42
  43 void
  44 ao_panic(uint8_t reason)
  45 {
  46         uint8_t n;
  47
  48         __critical for (;;) {
  49                 ao_panic_delay(20);
  50                 for (n = 0; n < 5; n++) {
  51                         ao_led_on(AO_LED_RED);
  52                         ao_beep(AO_BEEP_HIGH);
  53                         ao_panic_delay(1);
  54                         ao_led_off(AO_LED_RED);
  55                         ao_beep(AO_BEEP_LOW);
  56                         ao_panic_delay(1);
  57                 }
  58                 ao_beep(AO_BEEP_OFF);
  59                 ao_panic_delay(2);
  60
  61                 for (n = 0; n < reason; n++) {
  62                         ao_led_on(AO_LED_RED);
  63                         ao_beep(AO_BEEP_MID);
  64                         ao_panic_delay(10);
  65                         ao_led_off(AO_LED_RED);
  66                         ao_beep(AO_BEEP_OFF);
  67                         ao_panic_delay(10);
  68                 }
  69         }
  70 }