Method for Connecting a Flexray user having a Microcontroller to a Flexray Communications line Via a Flexray Communications Control Device, and Flexray Communications Control Device, Flexray User, and Flexray Communications System for Realizing this Method

• US 20090300254A1
• Filed: 10/04/2006
• Published: 12/03/2009
• Est. Priority Date: 10/06/2005
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Weber, Corina, Newald, Josef
• Application Number:
  US12/083,274
• Publication Number:
  US 20090300254A1
• Time in Patent Office: Days
• US Class Current: 710/305
• CPC Class Codes: H04L 12/40013 Details regarding a bus controller
• CPC Class Codes: H04L 12/407 with decentralised control
• CPC Class Codes: H04L 12/4135 using bit-wise arbitration
• CPC Class Codes: H04L 2012/40241 Flexray
• CPC Class Codes: H04L 2012/40273 the transportation system being a vehicle

Abstract

A method for connecting a FlexRay user having a microcontroller, which includes at least one serial interface, to a FlexRay communications link via a FlexRay communications control device having at least one serial hardware interface, the connection between the user and the communications control device being implemented via serial interfaces. To make it possible to connect the user to the communications controller via a serial interface without restricting its functionality, it is provided that at least one serial interface is emulated in the user, or that at least one additional serial interface is developed in the FlexRay communications control device.

Claims

1-12. -12. (canceled)

13. A method for connecting a FlexRay user having a microcontroller, which includes at least one serial interface, to a FlexRay communications connection via a FlexRay communications device having at least one serial hardware interface, the method comprising:

implementing the connection between the user and the communications control device via serial interfaces; and

one of (i) emulating at least one serial interface in the FlexRay user, and (ii) developing at least one additional serial interface in the FlexRay communications control device.

14. The method of claim 13, wherein the at least one serial interface is emulated on port expansion pins provided by the communications control device as it is.

15. The method of claim 14, wherein at least one shift register in which the data to be transmitted via the interface are buffer-stored for a serial data transmission is assigned to the port expansion pins provided by the communications control device as it is.

16. The method of claim 13, wherein a first connection between one of the serial interfaces of the user and a first functionality is developed directly in at least one serial interface emulated in the user, and wherein a second connection is optionally developed directly between another one of the serial interfaces of the user and a second functionality, and an additional connection is developed directly between another one of the serial interfaces and a FlexRay functionality of the FlexRay communications device.

17. The method of claim 16, wherein the particular connection to the first or second functionality is implemented via one of the emulated serial software interfaces that requires the lower data rate.

18. The method of claim 13, wherein in at least one of the serial interfaces developed in the FlexRay communications control device, a first connection is directly developed between one of the serial interfaces of the user and a first functionality, and a second connection between one of the other serial interfaces of the user and a second functionality is looped through the FlexRay communications control device.

19. The method of claim 18, wherein the FlexRay functionality together with the second functionality is transmitted via a portion of the second connection between the user and the communications control device.

20. A FlexRay communications control device for connecting a FlexRay user, comprising:

a microcontroller, which has at least one serial interface, to a FlexRay communications link, the communications control device having at least one serial interface and the connection between the user and the communications control device being implemented via serial interfaces, wherein at least one additional serial hardware interface is developed in the FlexRay communications control device, so that the communications control device has at least one serial hardware interface.

21. The communications control device of claim 20, wherein the FlexRay communications control device includes a FlexRay communications module for coupling the FlexRay communications link to the FlexRay user, the communications module including a system for buffer-storing messages, and at least one state machine, which controls the transmission of messages between the communications link and the user so that the state machine specifies specifiable sequences regarding data for storing and transmitting the messages.

22. A FlexRay user arrangement, comprising:

at least one serial interface; and

a microcontroller having the at least one serial interface;

wherein a FlexRay user is connectable via one of the serial interfaces via a FlexRay communications control device to a FlexRay communications link, the connection between the user and the communications control device being implemented via serial interfaces, and wherein at least one serial software interface is emulated in the user, so that the user has a total of at least two serial interfaces.

23. A FlexRay communications system, comprising:

FlexRay communications control devices; and

a FlexRay communications link having FlexRay users connected thereto via the FlexRay communications control devices, at least one of the users having a microcontroller which includes at least one serial interface;

wherein the connection between the at least one user and the communications control device is implemented via serial interfaces, and wherein the at least one user is directly connected via one of its serial interfaces to a first functionality, and via another emulated serial interface is directly connected to a second functionality, and via another one of its serial interfaces is directly connected to the FlexRay functionality of a FlexRay communications control device assigned to it, or the at least one user is directly connected to a first functionality via one of its serial interfaces, and via another one of its serial interfaces it is indirectly connected to a second functionality via the FlexRay communications control device assigned to it.

24. The communications system of claim 23, wherein the FlexRay communications system has a FlexRay communications module for coupling the FlexRay communications link to at least one of the FlexRay users, and wherein the communications module includes a system for buffer-storing messages, and a state machine, which controls transmission of messages between the communications link and the user so that the state machine specifies specifiable sequences regarding data for storing and transmitting the messages.