Method for encoded diagnostics in a functional safety system
US11579953B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2022 |
| Grant date | Feb 14, 2023 |
| Priority date | — |
| Expiry date | Jul 1, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/008
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method includes, storing a set of valid codewords including: a first valid functional codeword representing a functional state of a controller subsystem; a first valid fault codeword representing a fault state of the controller subsystem and characterized by a minimum hamming distance from the first valid functional codeword; a second valid functional codeword representing a functional state of a controller; and a second valid fault codeword representing a fault state of the controller; in response to detecting functional operation of the controller subsystem, storing the first valid functional codeword in a first memory; in response to detecting a match between contents of the first memory and the first valid functional codeword, outputting the second valid functional codeword; in response to detecting a mismatch between contents of the first memory and every codeword in the first set of valid codewords, outputting the second valid fault codeword.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.