Motor controller chip awakening system

Abstract

The invention discloses a motor controller chip awakening system, and overcomes the problems that in the prior art, the chip reset does not consider the influence of the reset times, that is, the chip reset is ceaselessly performed after an abnormity occurs, a timely exit mechanism does not exist, the chip reset is realized through hardware, and the cost is relatively high. The system comprises an initialization unit which resets each state variable, and starts a new round of watchdog monitoring; a watchdog monitoring unit which is used for judging whether a dog feeding signal exists or not and whether resetting is needed or not; a dog feeding unit which is used for calculating a watchdog calculation value for performing watchdog verification; a communication monitoring unit which is used for sending a communication enabling failure mark to a VCU awakening unit; the VCU awakening unit which is used for receiving the enabling failure mark and sending a reset signal to the MCU chip; and a reset frequency processing unit which is used for storing the reset frequency and erasing the rest storage space. When the program runs abnormally, quick resetting can be realized, restarting of the program is realized, and faults such as dead halt of the chip under extreme abnormal working conditions are greatly reduced.

Description

technical field [0001] The invention relates to the technical field of chip control, in particular to a motor controller chip wake-up system. Background technique [0002] With the development of electric vehicles, the design of motor controllers has become increasingly complex and has more and more functions, which brings great challenges to software engineers. Most motor controller software engineers are engaged in application layer development or underlying algorithm development, and have little understanding of the MCU chip level, especially the internal working mechanism and timing of the MCU. In actual debugging and research and development, various abnormal problems are often encountered, causing the program to run to an abnormal interruption or the program cannot be started at all. [0003] The existing solutions have the following problems: (1) The accuracy and stability are not good, that is, the abnormality cannot be accurately judged when an abnormality occurs; ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems in the prior art that the chip reset does not take into account the influence of the number of resets, that is, after an abnormality occurs, the reset does not stop, there is no timely exit mechanism, the problem is realized through hardware, and the cost is relatively large, and provides a The motor controller chip wakes up the system. When the program runs abnormally, it can be quickly reset to realize the restart of the program, which greatly reduces the failure of the chip such as crash under extreme abnormal working conditions.

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