blob: 9aa5d13dda184a81395e076f5473456a1f272bbf (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
/*
* OpenPSU firmware
* Utility functions
*
* Copyright (C) 2007 Michael Buesch <m@bues.ch>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "util.h"
#include "calibration.h"
#include "main.h"
#include "lcd.h"
#include <avr/io.h>
#include <avr/eeprom.h>
#include <avr/sleep.h>
#include <avr/wdt.h>
void panic(const char PROGPTR *msg)
{
irq_disable();
wdt_disable();
emergency_shutdown();
lcd_clear_buffer();
lcd_put_str("Whee! PANIC :(\n");
lcd_put_pstr(msg);
lcd_commit();
infinite_sleep();
}
void reboot(void)
{
irq_disable();
/* Enable the WDT in system reset mode. */
wdt_enable(WDTO_15MS);
while (1);
}
void infinite_sleep(void)
{
irq_disable();
wdt_disable();
set_sleep_mode(SLEEP_MODE_PWR_DOWN);
while (1)
sleep_mode();
}
ISR(WDT_vect)
{
panic(PSTR("watchdog"));
}
void wdt_enable_irq_mode(uint8_t timeout)
{
uint8_t sreg;
sreg = irq_disable_save();
wdt_reset();
__asm__ __volatile__(
"sts %0, %1 \n\t"
"sts %0, %2 \n\t"
: /* none */
: "M" (_SFR_MEM_ADDR(WDTCSR))
, "r" (1 << WDCE)
, "r" ((1 << WDIE) | (1 << WDIF) | timeout)
);
irq_restore(sreg);
}
|
