Patents by Inventor Andreas Kroop

Andreas Kroop 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).

  • System for exchanging data through data memory area of common memory in synchronous and asynchronous modes
    Patent number: 6128689
    Abstract: A device for use when exchanging data between two processor units comprises a first processor unit, which is arranged to selectively operate in one of a synchronous mode and an asynchronous mode when exchanging data with a second processor unit through a data memory area in a common memory. Preferably, the access to the data memory area is controlled by a state machine in the first processor unit. The state machine has a first state in which the data memory area is free, a second and a third state in which the data memory area is reserved for the first processor unit and the second processor unit, respectively, and a fourth and a fifth state, in which the data memory area is accessed by the first processor unit and the second processor unit, respectively. The device is advantageously used in a fieldbus system.
    Type: Grant
    Filed: April 14, 1997
    Date of Patent: October 3, 2000
    Assignee: HMS Fieldbus Systems AB
    Inventors: Nicolas Hassbjer, Jorgen Johansson, Staffan Dahlstrom, Andreas Kroop