In the paper,an I/O interfaces fault-tolerant scheme based on task-level redundancy is proposed.The method uses task-level redundancy techniques in the operating system,protects the I/O interface without disturbing other modules of the microcontroller unit.Since the method executes at the driver layer,it is transparent to the user application.This paper analyzes the fault source of the I/O interface of TMS570LS3137,uses the method proposed in this paper to design the fault tolerance scheme of the I/O interface,and applies the method to the microcontroller equipped with the SylixOS operating system.The proposed scheme is evaluated by the /O interface fault injection experiment.The experiment results show that the proposed scheme has high detection rate and low time and space overhead.
Key words
soft error /
task-level redundancy /
I/O interface /
fault tolerant /
microcontroller unit /
TMS570LS3137
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