Method and Apparatus for Accessing Data of a Message Memory of a Communication Module

• US 20080282041A1
• Filed: 06/29/2005
• Published: 11/13/2008
• Est. Priority Date: 08/05/2004
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Hartwich, Florian, Bailer, Franz, Horst, Christian
• Granted Patent: US 8,095,740 B2
• Time in Patent Office: Days
• US Class Current: 711/147
• CPC Class Codes: H04L 49/90 Buffering arrangements
• CPC Class Codes: H04L 49/9089 replacing packets in a storage arrangement, e.g. pushout

Abstract

A method and an apparatus for accessing data of a message memory of a communication module by inputting or outputting data into or from the message memory, the message memory being connected to a buffer memory assemblage and the data being transferred to the message memory or from the message memory, the buffer memory assemblage having an input buffer memory in the first transfer direction and an output buffer memory in the second transfer direction; and the input buffer memory and the output buffer memory each being divided into a partial buffer memory and a shadow memory, the following steps being performed in each transfer direction: inputting data into the respective partial buffer memory, and transposing access to the partial buffer memory and shadow memory, so that subsequent data can be inputted into the shadow memory while the previously inputted data are already being outputted from the partial buffer memory in the stipulated transfer direction.

Claims

1-15. -15. (canceled)

16. A method for one of inputting data into a message memory of a communication module and outputting data from the message memory of the communication module, comprising:

providing a connection between the message memory and a buffer memory assemblage, wherein data is configured to be transferred in a first transfer direction to the message memory and in a second transfer direction from the message memory, wherein the buffer memory assemblage has an input buffer memory in the first transfer direction and an output buffer memory in the second transfer direction, and wherein the input buffer memory and the output buffer memory are each divided into a partial buffer memory and a shadow memory; and

for each transfer direction, performing;

input of data into the respective partial buffer memory; and

transposing access to the partial buffer memory and the shadow memory, whereby subsequent data is enabled to be inputted into the shadow memory while the previously inputted data is being transferred from the partial buffer memory in the corresponding transfer direction.

17. The method as recited in claim 16, wherein the transposition of access to the partial buffer memory and the shadow memory is indicated by an identifier.

18. The method as recited in claim 16, wherein the transposition of access to the partial buffer memory and the shadow memory is initiated by an identifier.

19. The method as recited in claim 16, wherein data are transferred in a message that is provided with a message identifier, and wherein the transposition of access to the partial buffer memory and the shadow memory occurs when the message identifier is written into a defined register.

20. The method as recited in claim 16, wherein data are transferred in a message that is divided into at least a first data field and a second data field, and wherein selected data in at least one of the first data field and the second data field are transferred as a function of at least one data identifier.

21. The method as recited in claim 16, wherein the one of inputting data into the message memory of the communication module and outputting data from the message memory of the communication module is indicated by an access identifier that is entered in a register.

22. The method as recited in claim 20, wherein information regarding which one of the partial buffer memories and the shadow memories is currently being accessed is ascertained based on one of the access identifier and a position of the access identifier in the register.

23. The method as recited in claim 19, further comprising:

upon the transposition of access to the partial buffer memory and the shadow memory, transposing corresponding message identifiers in corresponding registers.

24. The method as recited in claim 16, wherein the transposition of access to the partial buffer memory and the shadow memory is initiated by a switchover identifier.

25. The method as recited in claim 16, wherein for at least one transfer direction, a start identifier is entered in a register when data are sought to be written into a memory.

26. A method for accessing data of a message memory, comprising:

providing a buffer memory, wherein the buffer memory is divided into a partial buffer memory and a shadow memory;

accessing the data of the message memory;

upon the accessing of the data of the message memory, inputting data into the partial buffer memory; and

transposing access to the partial buffer memory and the shadow memory, whereby subsequent data is enabled to be inputted into the shadow memory while the previously inputted data is being transferred from the partial buffer memory.

27. A buffer memory assemblage for accessing data of a message memory of a communication module, comprising:

an input buffer memory having a first partial buffer memory and a first shadow memory;

an output buffer memory having a second partial buffer memory and a second shadow memory;

a first transposing arrangement for transposing access to the first partial buffer memory and the first shadow memory; and

a second transposing arrangement for transposing access to the second partial buffer memory and the second shadow memory.

28. A buffer memory for accessing data of a message memory of a communication module, comprising:

a partial buffer memory;

a shadow memory corresponding the partial buffer memory; and

a transposing arrangement for transposing access to the partial buffer memory and the shadow memory.