Method for detecting vehicle-mounted multimedia crash reset by watchdog
An in-vehicle multimedia and watchdog technology, applied in error detection/correction, generation of response errors, instruments, etc., can solve the problems of unknown abnormal conditions, inability to reset the in-vehicle multimedia system, etc. Ease of use
Inactive Publication Date: 2018-12-21
CHONGQING SHENYU BEIDOU AUTOMOBILE ELECTRONICS
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Problems solved by technology
At present, there are usually two ways to optimize the software and hardware design of the vehicle-mounted multimedia system. One is to find out the fault problem, solve the fault problem, and optimize the operation mode of the system so that the optimized vehicle-mounted multimedia system will not crash or be abnormal. In such a case, there are often unknown abnormalities in such a processing method, which will be discovered only when a corresponding problem occurs, so as to effectively obtain the abnormality of the vehicle multimedia system; another way is to forcibly reset the system through an external case, In this way, the car multimedia system can be effectively reset, but this reset method is only used by engineers during the system development stage. After the system development stage is completed, because there is no external reset button, the user cannot reset the car multimedia system.
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[0021] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:
[0022] like Figure 1-Figure 3 As shown, the present invention provides a method for watchdog detection of car multimedia crash reset, which is suitable for car multimedia system, including the following steps:
[0023] 1) Get the switch closure status information of the car's ignition switch, if the car's ignition switch is on, go to step 2); if the car's ignition switch is off, go to step 6). It should be understood that the switch closure status information of the car ignition switch includes whether the car's ignition switch is turned on and off. When the car ignition switch is turned on, it can be effectively judged whether the car has started. To judge whether the car is running, if the car is not running, the ignition switch is in a closed state, then it can be judged that the car is not running. It should be understood that the watchdog proposed in ...
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The invention discloses a watchdog detecting vehicle-mounted multimedia dead machine reset method, which is suitable for vehicle-mounted multimedia system. The method comprises the following steps: 1)obtaining switch closed state information of automobile ignition switch of automobile; 2) detecting and judging whet that watchdog is initialized if the automobile ignition switch is turned on; 3) initializing that watchdog if the watchdog is not initialized; 4) if that watchdog has been initialize, starting the watchdog aft the watchdog is configured; 5) that switch close state information of the automobile ignition switch is obtained again; 6) If the car ignition is turned off, turnning off the watchdog. Turning off the watchdog includes stopping the watchdog from counting and restoring thewatchdog's flag. The invention provides a watchdog detection vehicle multimedia dead machine reset method, which can make the vehicle multimedia system automatically reset when system failure, dead machine and other conditions occur, so as to be convenient for users to use.
Description
technical field [0001] The invention relates to the technical field of vehicle-mounted multimedia systems, in particular to a method for a watchdog to detect vehicle-mounted multimedia crashes and resets. Background technique [0002] In the car multimedia system, when there is a crash or abnormality, the program will often detect whether the system is crashed or abnormal, wake up the interrupt in advance, and save the data in the interrupt or send an alarm to trigger the system reset. At present, there are usually two ways to optimize the software and hardware design of the vehicle-mounted multimedia system. One is to find out the fault problem, solve the fault problem, and optimize the operation mode of the system so that the optimized vehicle-mounted multimedia system will not crash or be abnormal. In such a case, there are often unknown abnormalities in such a processing method, which will be discovered only when a corresponding problem occurs, so as to effectively obtai...
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Login to View More IPC IPC(8): G06F11/07
CPCG06F11/0757
Inventor 李伟伟黄李陶
Owner CHONGQING SHENYU BEIDOU AUTOMOBILE ELECTRONICS