A multi-node CAN bus communication fault self-recovery method

Abstract

The present invention provides a multi-node CAN bus communication fault self-recovery method, which is used to solve the technical problem that the traditional CAN bus self-detection method has only an active query method and high hardware cost. The method is as follows: the host queries the CAN bus status, if there is no error, the normal status result is recorded as A, and stored in the CAN bus controller, if there is an error, the corresponding processing is performed until it is correct; the slave queries the interrupt register and the status register status, if there is no error, the normal interrupt status result is recorded as B, and the normal status register result is recorded as C, and they are sent to the CAN bus controller respectively, if there is an error, the corresponding processing is performed until it is correct; if the CAN bus controller receives signal A, signal B and signal C within the set time, the system is normal; if signal A is not received, the host is reset, if signal B or signal C is not received, the corresponding slave is reset, until signal A, signal B and signal C are received within the set time.

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