Contiki-NG
watchdog.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2014, SICS Swedish ICT.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the Institute nor the names of its contributors
14  * may be used to endorse or promote products derived from this software
15  * without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * This file is part of the Contiki operating system.
30  *
31  */
32 
33 /**
34  * \file
35  * JN516X watchdog support.
36  * \author
37  * Beshr Al Nahas <beshr@sics.se>
38  *
39  */
40 
41 #include "dev/watchdog.h"
42 #include "AppHardwareApi.h"
43 
44 /*---------------------------------------------------------------------------*/
45 static int counter = 0;
46 
47 /*---------------------------------------------------------------------------*/
48 void
50 {
51  counter = 0;
52  watchdog_stop();
53  /* enable WDT interrupt */
54  vAHI_WatchdogException(1);
55 }
56 /*---------------------------------------------------------------------------*/
57 void
59 {
60  /* We setup the watchdog to reset the device after two seconds,
61  unless watchdog_periodic() is called. */
62  counter--;
63  if(counter == 0) {
64  vAHI_WatchdogStart(9); /* about 8*2^(9-1)ms=2.048s timeout */
65  }
66 }
67 /*---------------------------------------------------------------------------*/
68 void
70 {
71  /* This function is called periodically to restart the watchdog
72  timer. */
73  vAHI_WatchdogRestart();
74 }
75 /*---------------------------------------------------------------------------*/
76 void
78 {
79  counter++;
80  if(counter == 1) {
81  vAHI_WatchdogStop();
82  }
83 }
84 /*---------------------------------------------------------------------------*/
85 void
87 {
88  vAHI_SwReset();
89 }
90 /*---------------------------------------------------------------------------*/
void watchdog_reboot(void)
Keeps control until the WDT throws a reset signal.
Definition: watchdog.c:94
void watchdog_start(void)
Starts the WDT in watchdog mode if enabled by user configuration, maximum interval.
Definition: watchdog.c:72
void watchdog_init(void)
Initialisation function for the WDT.
Definition: watchdog.c:63
void watchdog_periodic(void)
Writes the WDT clear sequence.
Definition: watchdog.c:85
void watchdog_stop(void)
Stops the WDT such that it won&#39;t timeout and cause MCU reset.
Definition: watchdog.c:140