You should never disable the watchdog anywhere in your code. However you might consider whether 1ms is appropriate is it possible that the period can be extended to encompass the worst case execution time without causing a failure to meet deadlines in general? If the answer is "no" then the algorithm does not belong in this task.
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Software design should not be a matter of trial and error - get the design right, implement the design. There are many options, but essentially it seems that your task partitioning is inappropriate your CAN Rx task should be responsible for receiving CAN messages only, and any action required in response to CAN messages deferred to one or more other tasks, perhaps fed from a message queue. Alternatively if the result is not specifically needed by the 1ms task, the service task could take the necessary action independently of the 1ms task. If the 1ms task needs the result of the algorithm then, the algorithm should run in a service task triggered by the 1ms task and run asynchronously to the 1ms task, the service task then makes the results available to the 1ms task when available (by shared memory or message passing perhaps). Yes you need another task, but you should not add a "big delay" and it is probably unnecessary and certainly a bad design.
Apart from that its an XY question - a question about your proposed solution to a different problem - you should ask about the problem directly. If it is possible to defeat the watchdog, then it is possible to do it by error, and then the whole point of the watchdog is defeated. Let's forget that one - it is a really bad idea. NB: This is a general problem on the watchdog timer and any useful informations will be much helpful for me. Must I develop another task with a big delay in other to run the algorithm? But the problem is that the algorithm need to be synchronised with the 1ms task since we are receiving CAN commands.Ĭan i add a sleep(<1ms) on the desired function in order to wait a little bit witout affecting other tasks I'm a newbie to the embedded world.By the way, in the algorithm main function the program will reset itself and this seems to be a timeOut generated by the expiration of the watchdog.Ĭan I disable the watchdog timer for this specified function (which must not be disabled but just for testing purpose)? It is possible to use more timeOut for the watchdog on that specified function? My mission is to fit an algorithm within this application, the development of the algorithm has been done, the problem is that in the task where the algorithm is running is a 1ms task and the algorithm needs much more time than the time dedicated to this function. The application uses an RTOS based on AUTOSAR OS, and this MPC target support two type of watchdogs software and hardware (they have used soft WDT). DeFeet DeCompressor D-Logo Running/Cycling Compression Socks – DECOMB Related ProductsĭeFeet AirEator 2.5in D Team Black Cycling/Running Socks – AIRDTKĭeFeet AirEator 2.5in D Logo Black Cycling/Running Socks – AIRDLBĭeFeet Cyclismo Black/Scarlet Cycling/Running Socks – CYCBLKĭeFeet AirEator 2.5in Share the Road Cycling/Running Socks – AIRSHRĭeFeet AirEator HiTop Q Bert Cycling/Running SocksĭeFeet AirEator 2.I'm working on a project for automotive system where we use the MPC5748 MCU.
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