Patents by Inventor ALAN FOOSE

ALAN FOOSE has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Ensuring a correct program sequence in a dual-processor architecture
    Patent number: 10345801
    Abstract: A method of ensuring a correct program sequence in a dual-Processor module that includes Processor A and Processor B. Processor A and Processor B are both coupled to a common memory. Processor A and Processor B each execute a first safety program and each generate an instruction stream therefrom. At one or more points in time while running the first safety program, Processor A reads its program counter value from a current instruction being executed and generates therefrom a current Processor A CRC value, and Processor B reading its program counter value from the same current instruction being executed generates therefrom a current Processor B CRC value. Processor A transfers its current CRC value to Processor B and/or Processor B transfers its current CRC value to Processor A, and these CRC values are compared. A safety action is triggered if the comparing determines non-matching current CRC values.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: July 9, 2019
    Inventors: Drew Christian Dehaas, Aad Van Wensen, Anton Beerens, Jonathan Farmer, Alan Foose
  • ENSURING A CORRECT PROGRAM SEQUENCE IN A DUAL-PROCESSOR ARCHITECTURE
    Publication number: 20190056723
    Abstract: A method of ensuring a correct program sequence in a dual-Processor module that includes Processor A and Processor B. Processor A and Processor B are both coupled to a common memory. Processor A and Processor B each execute a first safety program and each generate an instruction stream therefrom. At one or more points in time while running the first safety program, Processor A reads its program counter value from a current instruction being executed and generates therefrom a current Processor A CRC value, and Processor B reading its program counter value from the same current instruction being executed generates therefrom a current Processor B CRC value. Processor A transfers its current CRC value to Processor B and/or Processor B transfers its current CRC value to Processor A, and these CRC values are compared. A safety action is triggered if the comparing determines non-matching current CRC values.
    Type: Application
    Filed: August 21, 2017
    Publication date: February 21, 2019
    Inventors: DREW CHRISTIAN DEHAAS, AAD VAN WENSEN, ANTON BEERENS, JONATHAN FARMER, ALAN FOOSE