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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; 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  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  17  */
  18
  19 #include "ao.h"
  20
  21 #ifndef HAS_BEEP
  22 #error Please define HAS_BEEP
  23 #endif
  24
  25 #if !HAS_BEEP
  26 #define ao_beep(x)
  27 #endif
  28 #if !LEDS_AVAILABLE
  29 #define ao_led_on(x)
  30 #define ao_led_off(x)
  31 #endif
  32
  33 #ifndef AO_LED_PANIC
  34 #define AO_LED_PANIC    AO_LED_RED
  35 #endif
  36
  37 static void
  38 ao_panic_delay(uint8_t n)
  39 {
  40         uint8_t i = 0, j = 0;
  41
  42         while (n--) {
  43 #ifdef AO_PANIC_DELAY_SCALE
  44         uint8_t s = AO_PANIC_DELAY_SCALE;
  45         while (s--)
  46 #endif
  47                 while (--j)
  48                         while (--i)
  49                                 ao_arch_nop();
  50         }
  51 }
  52
  53 void
  54 ao_panic(uint8_t reason)
  55 {
  56         uint8_t n;
  57
  58 #if LOW_LEVEL_DEBUG
  59         ao_cur_task = NULL;
  60         printf ("panic %d\n", reason);
  61 #endif
  62         ao_arch_block_interrupts();
  63         for (;;) {
  64                 ao_panic_delay(20);
  65 #if HAS_BEEP
  66                 for (n = 0; n < 5; n++) {
  67                         ao_beep(AO_BEEP_HIGH);
  68                         ao_panic_delay(1);
  69                         ao_beep(AO_BEEP_LOW);
  70                         ao_panic_delay(1);
  71                 }
  72                 ao_beep(AO_BEEP_OFF);
  73                 ao_panic_delay(2);
  74 #endif
  75
  76 #ifdef SDCC
  77 #pragma disable_warning 126
  78 #endif
  79                 if (reason & 0x40) {
  80                         ao_led_on(AO_LED_PANIC);
  81                         ao_beep(AO_BEEP_HIGH);
  82                         ao_panic_delay(40);
  83                         ao_led_off(AO_LED_PANIC);
  84                         ao_beep(AO_BEEP_OFF);
  85                         ao_panic_delay(10);
  86                 }
  87                 for (n = 0; n < (reason & 0x3f); n++) {
  88                         ao_led_on(AO_LED_PANIC);
  89                         ao_beep(AO_BEEP_MID);
  90                         ao_panic_delay(10);
  91                         ao_led_off(AO_LED_PANIC);
  92                         ao_beep(AO_BEEP_OFF);
  93                         ao_panic_delay(10);
  94                 }
  95         }
  96 }