watchdog

I am trying to retrieve the return address of an IRQ handler in my code. My aim is to save the value of the PC just before the watchdog timer expires and before the reset for debug purposes, using WDT_IRQHandler(). I am also testing this approach with other IRQs to check if I grasped the idea. But it seems I haven't. I have read the documentation available. I understood that when an exception happens, 8 registers are pushed to the stack: R0, R1, R2, R3, R12, LR, PC and XPSR. I have also read that the stack is automatically double word aligned. So in my mind, retrieving the return address is as

Happy Monday to you all! Here is my situation. Any assistance greatly appreciated! I have created an executable that when installed gets placed in the Launch Agents folder of the machine. In theory it should run perpetually, collecting data every second. It can stop when the machine is asleep, but restart when the computer is reactivated. Here is my problem: sometimes the program just spontaneously stops , usually after a couple of days of running. If one restarts the computer then the program restarts and again runs for awhile before the same problem occurs. I have no idea the reason for this

I'm using Python's Watchdog to monitor a given directory for new files being created. When a file is created, some code runs that spawns a subprocess shell command to run different code to process this file. This should run for every new file that is created. I've tested this out when one file is created, and things work great, but am having trouble getting it working when multiple files are created, either at the same time, or one after another. My current problem is this... the processing code run in the shell takes a while to run and will not finish before a new file is created in the

I have an system running embedded linux and it is critical that it runs continuously. Basically it is a process for communicating to sensors and relaying that data to database and web client. If a crash occurs, how do I restart the application automatically? Also, there are several threads doing polling(eg sockets & uart communications). How do I ensure none of the threads get hung up or exit unexpectedly? Is there an easy to use watchdog that is threading friendly? The gist of it is: You need to detect if the program is still running and not hung. You need to (re)start the program if the

I have a processor AT91SAM9G20 running a 2.6 kernel. Watchdog is enabled at bootstrap level and configured for 16 seconds. Watchdog mode register can be configured only once. When code hangs either in bootstrap, bootloader or kernel, the board reboots. But once kernel comes up even though watchdog is not refreshed in any of the applications, the board is not being reset after 16 seconds, but 15 minutes. Who is refreshing the watchdog? In our case, the watchdog should be influenced by applications, so that the board can reset if our application hangs. These are the running processes: 1 root

Running on Ubuntu, every time i create a file i get a modified and a created event. Is this by design or am i doing something wrong? I'm using the event handler class PatternMatchingEventHandler event_handler = MediaFileHandler(ignore_directories=True) observer = Observer() observer.schedule(event_handler, path=directory, recursive=True) observer.start() If this is the correct behavior, can i safely ignore the created event? Short answer: f = open(... , 'w') generates a FileCreatedEvent , f.flush() or f.close() can generate a FileModifiedEvent . So yes, creating a file often generates both

本节介绍的是在 linux 系统环境下看门狗测试例程。WatchDog 是为了能够防止程序跑飞 而使用的一种东西，用户在一般的程序也许不需要,但在特殊的情况下可能会需要这种机制。 在此我们将介绍看门狗实验调试步骤。 看门狗驱动飞思卡尔已经做好，只需要我们调用即可，设备节点为 “/dev/watchdog”，如下图所示。 将“watchdogtest”（在压缩包中）拷贝到开发板，使用命令“chmod 777 watchdogtest”修改权限，然后使用命令“./watchdogtest”,即可开启看门狗，并每秒喂狗 1 次，持续 10 秒，停止喂狗之后开发板就会重启。 来源： https://my.oschina.net/u/3005926/blog/3102199