Add comments, clean up white space, etc.
[fw/altos] / ao_panic.c
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 static void
21 ao_panic_delay(uint8_t n)
22 {
23         uint8_t i = 0;
24
25         while (n--)
26                 while (--i)
27                         _asm nop _endasm;
28 }
29
30 void
31 ao_panic(uint8_t reason)
32 {
33         uint8_t n;
34         
35         for (;;) {
36                 ao_led_on(AO_LED_RED);
37                 ao_beep(AO_BEEP_MID);
38                 ao_panic_delay(2);
39                 ao_led_off(AO_LED_RED);
40                 ao_beep(AO_BEEP_OFF);
41                 ao_panic_delay(2);
42                 for (n = 0; n < reason; n++) {
43                         ao_led_on(AO_LED_RED);
44                         ao_beep(AO_BEEP_MID);
45                         ao_panic_delay(1);
46                         ao_led_off(AO_LED_RED);
47                         ao_beep(AO_BEEP_OFF);
48                         ao_panic_delay(1);
49                 }
50                 ao_panic_delay(2);
51         }
52 }