METHOD AND DATA TRANSMISSION SYSTEM FOR TRANSFERRING DATA BETWEEN THE DATA TRANSMISSION SYSTEM AND A HOST PROCESSOR OF A PARTICIPANT IN A DATA TRANSMISSION SYSTEM

• US 20100054282A1
• Filed: 02/12/2007
• Published: 03/04/2010
• Est. Priority Date: 03/22/2006
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Rohatschek, Andreas-Juergen, Schroff, Clemens, Wehefritz, Karsten, Schirmer, Juergen
• Granted Patent: US 7,995,620 B2
• Time in Patent Office: Days
• US Class Current: 370/503
• CPC Class Codes: G06F 1/12 Synchronisation of different clock signals provided by a plurality of clock generators
• CPC Class Codes: H04J 3/0694 Synchronisation in a TDMA node, e.g. TTP
• CPC Class Codes: H04L 12/40013 Details regarding a bus controller
• CPC Class Codes: H04L 12/417 with deterministic access, e.g. token passing
• CPC Class Codes: H04L 2012/40241 Flexray
• CPC Class Codes: H04L 2012/40273 the transportation system being a vehicle

Abstract

A method is for transferring data between a data transmission system and a processor of a participant in the data transmission system. All components of the data transmission system are synchronized to a common global time base. The operating-system time base of the participant processor is synchronized to the global time base of the data transmission system. To render possible a synchronization of the operating-system time base to the global time base in complex data transmission systems as well, it is provided that the operating-system time base of the participant processor be synchronized to the global time base of the data transmission system at least prior to a data transfer, and, to this end, that a synchronization clock pulse that is synchronous to the global time base of the data transmission system be provided for synchronizing the operating-system time base. This synchronization clock pulse is provided by a suitable arrangement that is implemented as hardware and/or software. In a data transmission system for implementing the method, the synchronization clock pulse is provided by suitable arrangement(s) of the communications controller and applied to the host processor via a synchronization line.

Claims

1-14. -14. (canceled)

15. A method for transferring data between a time-controlled data transmission system and a processor of a participant in the data transmission system, comprising:

synchronizing all components of the data transmission system to a common global time base, the participant processor having its own time base, which is also used by an operating system running on the participant processor;

wherein the operating-system time base of the participant processor is synchronized to the global time base of the data transmission system, at least prior to a data transfer; and

a synchronization clock pulse that is synchronous to the global time base of the data transmission system is provided by a communications controller of the participant to synchronize the operating-system time base.

16. The method according to claim 15, wherein the synchronization between the global time base of data transmission system and the operating-system time base of the participant processor is performed continuously during operation of the data transmission system.

17. The method according to claim 15, wherein a current time of the data transmission system is ascertained by the participant processor in accordance with the synchronization clock pulse, and the operating-system time base is corrected accordingly.

18. The method according to claim 15, wherein, in accordance with the synchronization clock pulse, the communications controller of the participant generates interrupts via which the operating-system time base is synchronized.

19. The method according to claim 15, wherein processes of periodic bus-synchronous tasks in the operating system are coordinated by a scheduler of the operating system as a function of the synchronization clock pulse.

20. The method according to claim 19, wherein the operating system includes a time scheduler which is invoked by a periodic timer-interrupt routine and which presets a beginning of the processes of the periodic bus-synchronous tasks as a function of the clock pulse period of the timer-interrupt routine.

21. The method according to claim 19, wherein the operating system includes an event scheduler which is invoked by at least one of (a) an event-controlled and (b) a periodic event-interrupt routine and which presets the beginning of the processes of the periodic bus-synchronous tasks and of the processes of event-controlled tasks as a function of the synchronization clock pulse.

24. The data transmission system according to claim 23, wherein the synchronization arrangement is configured to implement the method according to claim 16.

26. The participant according to claim 25, wherein the participant includes an arrangement configured to implement the method according to claim 16.

28. The communications controller according to claim 27, wherein the communications controller includes an arrangement configured to implement the method according to claim 16.

22. A time-controlled data transmission system having a plurality of participants and a network structure adapted to transmit data among the participants, the processors being assigned to the participants, all components of the data transmission system synchronized to a common global time base, and the participant processor of each respective participant having its own time base, which is also used by an operating system running on the participant processor, wherein the data transmission system includes an arrangement configured to synchronize the operating-system time base of the processor of at least one of the participants to the global time base of the data transmission system, at least prior to a data transfer between the data transmission system and the participant processor, and a communications controller of at least one participant includes an arrangement configured to provide a synchronization clock pulse that is synchronous to the global time base of the data transmission system, to synchronize the operating-system time base.

23. The data transmission system according to claim 22, wherein the processor of the participant has an input configured to receive the synchronization clock pulse and an arrangement configured to synchronize the operating-system time base to the synchronization clock pulse.

25. A participant of a time-controlled data transmission system, which has a plurality of participants and a network structure configured to transmit data among the participants, a processor assigned to the participants, all components of the data transmission system synchronized to a common global time base, and the participant processor having its own time base, which is also used by an operating system running on the participant processor, wherein the participant includes an arrangement configured to synchronize the operating-system time base of the participant processor to the global time base of the data transmission system, at least prior to a data transfer between the data transmission system and the participant processor, and a communications controller of the participant includes an arrangement configured to synchronize a clock pulse that is synchronous to the global time base of the data transmission system, to synchronize the operating-system time base.

27. A communications controller of a participant in a time-controlled data transmission system, which has a plurality of participants and a network structure configured to transmit data among the participants, a processor assigned to the participant, all components of the data transmission system, including the communications controller, synchronized to a common global time base, and the communications controller synchronized to a separate time base of an operating system running on the participant processor, wherein the communications controller includes an arrangement configured to provide a synchronization clock pulse that is synchronous to the global time base of the data transmission system, to synchronize the operating-system time base, and the participant includes an arrangement configured to synchronize the operating-system time base of the participant processor to the global time base of the data transmission system, at least prior to a data transfer between the data transmission system and the participant processor.