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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 #ifndef AO_LED_PANIC
  33 #define AO_LED_PANIC    AO_LED_RED
  34 #endif
  35
  36 static void
  37 ao_panic_delay(uint8_t n)
  38 {
  39         uint8_t i = 0, j = 0;
  40
  41         while (n--) {
  42 #ifdef AO_PANIC_DELAY_SCALE
  43         uint8_t s = AO_PANIC_DELAY_SCALE;
  44         while (s--)
  45 #endif
  46                 while (--j)
  47                         while (--i)
  48                                 ao_arch_nop();
  49         }
  50 }
  51
  52 void
  53 ao_panic(uint8_t reason)
  54 {
  55         uint8_t n;
  56
  57 #if LOW_LEVEL_DEBUG
  58         ao_cur_task = NULL;
  59         printf ("panic %d\n", reason);
  60 #endif
  61         ao_arch_block_interrupts();
  62         for (;;) {
  63                 ao_panic_delay(20);
  64 #if HAS_BEEP
  65                 for (n = 0; n < 5; n++) {
  66                         ao_beep(AO_BEEP_HIGH);
  67                         ao_panic_delay(1);
  68                         ao_beep(AO_BEEP_LOW);
  69                         ao_panic_delay(1);
  70                 }
  71                 ao_beep(AO_BEEP_OFF);
  72                 ao_panic_delay(2);
  73 #endif
  74
  75 #ifdef SDCC
  76 #pragma disable_warning 126
  77 #endif
  78                 if (reason & 0x40) {
  79                         ao_led_on(AO_LED_PANIC);
  80                         ao_beep(AO_BEEP_HIGH);
  81                         ao_panic_delay(40);
  82                         ao_led_off(AO_LED_PANIC);
  83                         ao_beep(AO_BEEP_OFF);
  84                         ao_panic_delay(10);
  85                 }
  86                 for (n = 0; n < (reason & 0x3f); n++) {
  87                         ao_led_on(AO_LED_PANIC);
  88                         ao_beep(AO_BEEP_MID);
  89                         ao_panic_delay(10);
  90                         ao_led_off(AO_LED_PANIC);
  91                         ao_beep(AO_BEEP_OFF);
  92                         ao_panic_delay(10);
  93                 }
  94         }
  95 }