GATEWAY FOR A DATA BUS SYSTEM

• US 20090198856A1
• Filed: 05/16/2007
• Published: 08/06/2009
• Est. Priority Date: 05/18/2006
• Status: Abandoned Application

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: NXP B.V. (NXP Semiconductors NV)
• Inventors: Habben, Hartmut
• Application Number:
  US12/301,419
• Publication Number:
  US 20090198856A1
• Time in Patent Office: Days
• US Class Current: 710/305
• CPC Class Codes: H04L 12/40032 Details regarding a bus interface enhancer
• CPC Class Codes: H04L 12/4625 Single bridge functionality, e.g. connection of two networks over a single bridge
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• CPC Class Codes: H04L 2012/40215 Controller Area Network CAN
• CPC Class Codes: H04L 43/00 Arrangements for monitoring or testing data switching networks
• CPC Class Codes: H04L 43/50 Testing arrangements

Abstract

The invention is related to a Gateway for a data bus system, especially a CAN-Bus-system, with at least two data bus source channels, the gateway being provided with—an interface for each data bus source channel, —a protocol core in each channel interface, —a channel message switch, whose inputs are coupled to the outputs of the protocol cores of the channel interfaces and whose output can be switched to one of its inputs, —a message handler coupled to the output of the channel message switch and being provided with a message filter for selecting messages and with a message buffer, —a channel interface with a protocol core coupled to a data bus target channel, —a control, that, in a diagnostic copy function, copies all the messages from a selectable source channel to the message handler by setting the channel message switch to the position assigned to the selected source channel and that causes the message filter to couple the filtered messages to the interface of the target channel.

Claims

1. Gateway for a data bus system, especially a Controller-Area Network (CAN)-Bus-system, with at least two data bus source channels, the gateway being provided with

an interface for each data bus source channel,

a protocol core in each channel interface, a channel message switch, whose inputs are coupled to the outputs of the protocol cores of the channel interfaces and whose output can be switched to one of its inputs,

a message handler coupled to the output of the channel message switch and being provided with a message filter for selecting messages and with a message buffer,

a channel interface with a protocol core coupled to a data bus target channel,

a control, that, in a diagnostic copy function,

copies all the messages from a selectable source channel to the message handler by setting the channel message switch to the position assigned to the selected source channel and that

causes the message filter to couple the filtered messages to the interface of the target channel.

3. Gateway accordingly to claim 1, characterized in that the data bus is a bus according to the CAN standard.

2. Gateway according to claim 2, characterized in that the gateway is provided with a second message switch, which is designed to switch the messages, that are output by the message handler, to one of more than one target channel interface.