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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 #if LOW_LEVEL_DEBUG
  49         ao_cur_task = NULL;
  50         printf ("panic %d\n", reason);
  51 #endif
  52         __critical for (;;) {
  53                 ao_panic_delay(20);
  54                 for (n = 0; n < 5; n++) {
  55                         ao_led_on(AO_LED_RED);
  56                         ao_beep(AO_BEEP_HIGH);
  57                         ao_panic_delay(1);
  58                         ao_led_off(AO_LED_RED);
  59                         ao_beep(AO_BEEP_LOW);
  60                         ao_panic_delay(1);
  61                 }
  62                 ao_beep(AO_BEEP_OFF);
  63                 ao_panic_delay(2);
  64
  65 #ifdef SDCC
  66 #pragma disable_warning 126
  67 #endif
  68                 if (reason & 0x40) {
  69                         ao_led_on(AO_LED_RED);
  70                         ao_beep(AO_BEEP_HIGH);
  71                         ao_panic_delay(40);
  72                         ao_led_off(AO_LED_RED);
  73                         ao_beep(AO_BEEP_OFF);
  74                         ao_panic_delay(10);
  75                 }
  76                 for (n = 0; n < (reason & 0x3f); n++) {
  77                         ao_led_on(AO_LED_RED);
  78                         ao_beep(AO_BEEP_MID);
  79                         ao_panic_delay(10);
  80                         ao_led_off(AO_LED_RED);
  81                         ao_beep(AO_BEEP_OFF);
  82                         ao_panic_delay(10);
  83                 }
  84         }
  85 }