How to claim common bus occupancy rights on multiple processors

摘要

A method of improving the reliability of a duplicated common bus and informing the operator of the normal or uncorrected state of the common bus is disclosed. Such a method of the present invention comprises a higher level processor 10, a lower level processor 20 having a plurality of processors, a redundant common bus 30 having first and second buses, and the processor 20 and the duplication. The main processing processor 40 on the software side excluding the common bus 30 is provided, and the main processing processor 40 connected to the lower weave processor 20 is the plurality of lower level processors 20. A method for requesting a common bus occupancy right for transmitting data from a common bus matching circuit axis in the lower level processor 20, wherein the software main processor 40 is duplicated to the first and second buses. Detecting a state of one of the buses currently running, and requesting common bus occupancy rights to the bus matching circuit of the processor 20 only in a normal state; Detecting, by the software main processing processor 40, any one of the buses currently running in the common bus 30, and notifying an operator of an abnormal state; After the notification step, the main processing processor 40 on the software side replaces an abnormal bus among the common bus 30 having the first and second buses with a normal bus.