Program flow monitoring for deterministic firmware functions

The present disclosure relates to a safety system having a memory unit configured to store a series of executable instructions. In some embodiments, the executable instructions are grouped into code parts, and each code part is assigned a predefined code value. A processor is configured to execute t...

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Bibliographic Details
Main Author Gstoettenbauer, Bernhard
Format Patent
LanguageEnglish
Published 14.01.2020
Subjects
BASIC ELECTRONIC CIRCUITRY
CALCULATING
CODE CONVERSION IN GENERAL
CODING
COMPUTING
COUNTING
DECODING
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary:The present disclosure relates to a safety system having a memory unit configured to store a series of executable instructions. In some embodiments, the executable instructions are grouped into code parts, and each code part is assigned a predefined code value. A processor is configured to execute the series of executable instructions, and to output the predefined code values respectively as the code parts are executed. A program flow monitoring (PFM) unit is configured to respectively receive the predefined code values from the processor, such that the PFM unit generates an error-checking value from the predefined code values. A verification unit is configured to compare the error-checking value to an expected return value to determine whether the series of executable instructions executed properly.
Bibliography:Application Number: US201615344926