watchdog sys

I. PrefaceToday, we want to learn through experiments and understand the use of the watchdog, the watchdog is to prevent the program to fly, through constant feeding to the dog, so that the watchdog can continue to monitor the running state of the program, when the program runs fly, can promptly pull back the program.Two. Principle and analysisThe

Ⅰ , overviewFor the watchdog, I think it is not unfamiliar to do single-chip or embedded development personnel, today summarizes the function of stm32f0 watchdog,F0 watchdog has two kinds: independent and window watchdog. Today we offer two kinds of watchdog software enginee

The analog watchdog of the ADC is used to check whether the voltage is out of bounds. It has two upper and lower boundaries, which can be set in registers adc_htr and adc_ltr respectively. Library functions are set using adc_analogwatchdogthresholdsconfig. both conventional and injection channels are simple. When the simulated watchdog detects that the voltage is higher than or below the upper limit, the

Window watchdog (WWDG) is often used to monitor software failures caused by external interference or unforeseen logic conditions that result from an application deviating from a normal running sequence. In short, the difference between the IWDG and the IWDG is to feed the dog by hand, and WWDG has a built-in interrupt, so you can use the Set Interrupt service function to feed the dog. First, set the WWDG (remember to add a header file to the project)

SOFT_WDT is a software-implemented Linux watchdog.SOFT_WDT is an open source, free software.: Http://sourceforge.net/projects/soft-wdt/files/latest/download?source=filesMain features of SOFT_WDT:1. He can provide a large number of watchdog for user use;2. The features of each watchdog can be set individuallyAfter the SOFT_WDT code is compiled, a kernel module Soft_wdt.ko is generated.After the module is loa

Working principle of the watchdog: Set the full execution cycle of the system program to TP. The timer period of the watchdog is Ti, Ti> TP. When the program is executed normally, the timer will not overflow, if the system cannot change the timer value at the time of TP due to interference or other reasons, the timer will overflow at the time of Ti, causing system reset, so that the system can be executed a

Working principle of the watchdog: Set the time for the entire system program to run for one cycle to TP. The timer period of the watchdog is Ti, Ti> TP. When the program runs normally, the timer will not overflow, if the system cannot modify the timer value at the time of TP due to interference or other reasons, the timer will overflow at the time of Ti, causing system reset, enabling the system to run aga

3.1 Watchdog IntroductionFor a pure soft programmer like the author who has not played hardware, the first time I saw this guy, I really confused, but I thought it was a very interesting name. A survey found that the watchdog mechanism originated from the hardware, in the computer system, the single-chip microcomputer work is susceptible to interference from the external electromagnetic field, and into the

Linux watchdog-watchdog5.8 released-Linux general technology-Linux programming and kernel information. The following is a detailed description. Linux comes with a watchdog implementation for monitoring system running, including a kernel watchdog module and a user space watchdog program The kernel

The Android platform implements a software watchdog to monitor the systemserver. Systemserver is undoubtedly the most important process in the Android platform, which runs the vast majority of services throughout the platform.Systemserver exit is not a problem, because the INIT process restarts it, but it's a deadlock because the system can't move. So we need to use the watchdog to monitor it, and when the

Refer to Teacher Zhu Tutorial video explanation, video link address: http://edu.51cto.com/lecturer/user_id-9584512.html 1. Guard Dog Watchdog (Watch dog timer watchdog timers)Physically, the watchdog is actually a timer (similar to a real-life alarm clock), and hardware is an internal peripheral inside the SOC.Wtcon (0xe2700000), where BIT5 is a

For the WWDG routines given by the STM32 window watchdog and the atomic battleship, there are a few issues to be recorded. 1. WWDG time-out formula derivation 1.1 WWDG work diagram 1.2 WWDG time-out formula derivation (1) The value of the upper window can only be set, the maximum number of 7 bits binary can only be set to 127 (0x7F), the minimum must be greater than the 0x40 of the lower window, so its value range is 64~127 (ie: 0x40~0x7f) (2) Config

IOS-Exception Type: 00000020: What is the watchdog mechanism, ios-000000201. preface a Crash we encountered after the project Crash a few days ago. After visiting many forums, the blog did not find a satisfactory reply.IOS watchdog mechanismWith a basic understanding, there are a lot of strange Crash may be shared today because of the iOS watchdog mechanism. I ho