1 // Copyright 2009 Olivier Gillet.
2 //
3 // Author: Olivier Gillet (ol.gillet@gmail.com)
4 //
5 // This program is free software: you can redistribute it and/or modify
6 // it under the terms of the GNU General Public License as published by
7 // the Free Software Foundation, either version 3 of the License, or
8 // (at your option) any later version.
9 // This program is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 // GNU General Public License for more details.
13 // You should have received a copy of the GNU General Public License
14 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
15 //
16 // -----------------------------------------------------------------------------
17 //
18 // Real time clock.
19 
20 #ifndef AVRLIB_WATCHDOG_TIMER_H_
21 #define AVRLIB_WATCHDOG_TIMER_H_
22 
23 #include <avr/wdt.h>
24 
25 #include "avrlib/base.h"
26 
27 namespace avrlib {
28 
29 // Note: this requires the bootloader to clear the Watchdog timer flags just
30 // after start-up.
SystemReset(uint8_t interval)31 inline void SystemReset(uint8_t interval) {
32   wdt_enable(interval);
33 }
34 
ResetWatchdog()35 inline void ResetWatchdog() {
36   uint8_t watchdog_status = MCUSR;
37   MCUSR = 0;
38   WDTCSR |= _BV(WDCE) | _BV(WDE);
39   WDTCSR = 0;
40 }
41 
42 }  // namespace avrlib
43 
44 #endif  // AVRLIB_WATCHDOG_TIMER_H_
45