wifi watchdog

A Overview Some important program must keep it running, and always care about its state------------can't let it deadlock. Of course, if a main program has a deadlock, it must be a design or programming error. The first thing we do is to get this bug out. But if the time is tight, this bug and "erratic", then, we still write a software "watchdog", temporarily should be urgent. Description of "Watchdog" req

/** Watchdog usage. * Author: serval li * Date: Jun 27th, 2012 **/# include CodeSave it first and use the watchdog implemented by softdog. C. Its kernel module is named softdog. Ko and is located under/lib/modules/$ kernelver/kernel/Drivers/watchdog.

Bug in STM32F4 Series MCU, window watchdog WWDG. 1. If it is possible to pre-feed the dog interrupt, then the following two points must be met (1) Before turning on the WWDG interrupt, the EWI flag bit in the SR register must be zeroed out, otherwise the watchdog will constantly reset (2) Add a small delay to the WWDG_IRQ, otherwise the watchdog will be const

#!/bin/sh# file timestamp to record the heartbeat of spring-rest-Servertimestamp=/usr/apache-tomcat-7.0. the/logs/timestamp.log# Timeout 60stimeout=60000# error Logstderr=/usr/apache-tomcat-7.0. the/logs/tomcat-watchdog.log#1means need to Restartrestart=0# the error infoerrinfo="'# Check whether file existsif[ -e $timestamp]; then# Check whether contains valueif[ -s $timestamp]; Thenstart_time=$ (cat $timestamp) # integer Checkif[1-eq ' echo $start _time|grep-p"^-?\d+$"|WC-l ']; Thenend_time=$ (

Label: style ar use SP file data on log BS Because it is a software watchdog, his role can only be considered as a helper tool. However, its function should be meaningless. The implementation plan of this software is as follows: 1. Software form A module soft_wdt.ko runs in the kernel. 2. software startup Method Insmod soft_wdt.ko Dev =/dev/soft_wdt timeout = 5 log =/path/to/log.txt These parameters are: device files to be exposed to users,

The watchdog of recent projects has undergone three version numbers.First version number:With PS-EF, if the program hangs, it starts.Second version number:The program will not listen to the 7901port when it executes, so it is not easy to infer whether the machine is dead, but to infer if the port is listeningThird version number:When the 7901port is no longer listening, the original killall will be restarted first. Every time you output to a file, add

void Wwdg_init(void){LPC_SC, PCLKSEL0 |= (30); Crossover number is eightLPC_WDT-Wdclksel = ~ (30);LPC_WDT, Wdclksel |= (10); Set WDT clock to APBLPC_WDT, Wdclksel |= (1); Lock Clock SourceLPC_WDT-WDTC = 0xFFFF; Setting overloaded valuesLPC_WDT, wdmod |= (10) | ( 11); Watchdog enable and set trigger resetAt this point the initialization is complete.}Shutdown Total System Interrupt__asm void Nvic_setprimask(void){Cpsid IBX R14}Turn on total system outag

A simple watchdog script that automatically restarts a process when it is stopped. The script is as follows: 1get_web_srv_sts () 2 { 3 ret = 'ps-AEF | grep "$1" | grep-V grep | WC-l' 4 5 case $ RET in 6 0) 7 fun_ret = "down" 8 ;; 9 1) 10 fun_ret = "up" 11 ;; 12 *) 13 fun_ret = "error: $ RET instances running" 14 ;; 15 esac 16} 17 18 19 get_web_srv_sts "./process1" 20 if [$ fun_ret = 'up'] 21 then 22 echo "process1 running" 23 else 24./process1 25 slee

error, Ack error, format error), error detection, response method (ACK, NACK ), communication Mode (Half Duplex) and other settings; The MAC Sub-layer is the core of the CAN protocol. The function of the data link layer is to form meaningful messages from the physical layer and provide transmission control procedures such as error control. The function of the data link layer is usually executed in the hardware of the CAN controller;Frame concept: Data frame: the frame used by the sending unit t

The watchdog of the recent project has undergone three versions.First version:With PS-EF, if the program hangs, it starts.A second version:program because the runtime will not listen to the 7901 port, so it is not easy to determine whether the machine is hanging, but to determine if this port is listeningA third version:When the 7901 port is no longer listening, the original killall in the start, each output to the content of the file to add the date,

Install the official small WiFi drive, only let it as a wireless signal transmitter, but I want to through the small WiFi to allow my desktop computer can all receive wireless signal, so after a toss finally success. Mine is Win7.Small WiFi does not accept the wireless signal, can not be used as a normal wireless card. So I came up with a method: The small degree

Whether it's a high-tech mobile phone in Iron Man, or a 3D computer where avatar can manipulate everything, the ubiquitous connection is the simplest dream of technology for the future. At just the end of the 2013-year Tencent we conference, Tencent CEO Ma summed up the internet in the future of the seven directions, in which the concept of "connectivity" is particularly recognized by the industry, and the "connection" is connected to the physical world, the user can touch all aspects of life wi

WiFi location principle and IOS WiFi list accessFor everyone, WiFi should be a familiar word, and we may be using WiFi hotspots every day. Wifi In addition to provide us with a focus on the role of positioning, now mobile devices to the user's privacy protection is increasin

Android system transplantation and debugging -------) how to add an adb wifi wireless debugging function [developer options]-[Wifi debugging] First, understand how to set adb wifi wireless debugging function, as shown below. 1. Enable the adb tcp connection port on the mobile phone end :/$setprop service.adb.tcp.port 5555:/$stop adbd:/$start adbd Specifically, se

[Smart Home] applications of wifi in Smart Home and wifi in Smart Home Reprint please indicate the source: http://blog.csdn.net/Righthek thank you! When designing a smart home system solution, a critical point is the networking mode. The networking mode is related to the stability, scalability, and real-time performance of the entire Smart Home System. In terms of installation and maintenance, I think no on

Flash is China's Zhejiang Telecom for college users to launch the dial-up Internet software, after the successful dial-up, users can be converted to wireless WiFi through the WiFi shared companion software, easy to use mobile devices, WiFi companion software users can freely set WiFi hotspot name and password, you can

1. How to get the WiFi object and operate the WiFi device, you need to get Context.getsystemservice (Context.wifi_service) to get the Wifimanager object, and use this object to manage WiFi devices. Addnetwork (wificonfiguration config) Adds a config description of the WiFi network, by default, this

reprint Please indicate source: Http://blog.csdn.net/Righthek Thank you! The previous article has mentioned that the most important two functions of the USB interface in the WiFi module are Usb_read_port () and Usb_write_port (). So how do they relate to WiFi? We can analyze from the following three aspects:1, the first need to clear the WiFi module is a USB devi

Mobile phone want to visit the page, need data, traffic, of course, can also through WiFi, this time need some WiFi helper class gadgets, small series today recommended Tencent WiFi Butler, this is a similar WiFi universal key tools to allow users free access to many WiFi Oh

Previous articles have briefly explained the basic knowledge of wifi. For more information, see WiFi learning for Android (1 ). On this basis, this article further improves program functions, the main functions are to enable the wireless network card, disable the wireless network card, check the network card status, scan the network, scan the results, connect to wifi