Robert Boschgmbh

Franz Bailer

Florian Hartwich

Christian Horst

Arthur Mutter

Andreas Mueller

Timo Lothspeich

Markus Ihle

Tobias Lorenz

Thomas Wagner

Jan Scheuing

Ramona Jung

Thorsten Schwepp

Thomas Enderle

Marc Schreier

A subscriber station for a serial bus system. The subscriber station has a communication control device, and a re-integration module for re-integrating the communication control device into a communication on the bus to temporally synchronize the communication control device to a signal transmitted from the at least one other subscriber station of the bus system, which signal is created based on a frame for communication in the bus system. The re-integration module checks at least one predetermined re-integration condition to decide whether the operating mode of the communication control device is or is not to be switched into an operating mode for transmitting frames to the bus and/or for receiving frames from the bus, and uses in its check at least one predetermined re-integration condition having a sequence of bits in which the value of the last bit differs from that of the preceding bits.

Subscriber station for a serial bus system and method for communication in a serial bus system

A subscriber station for a serial bus system. The subscriber station has a communication control device for controlling a communication of the subscriber station with at least one other subscriber station of the bus system. The communication control device generates a transmit signal according to a frame and inserts a field having an edge into the frame after a second communication phase. The field has, before the edge, a predetermined length corresponding to a time period that is longer than the time period of a bit time of a first communication phase. The edge is provided for synchronization to the communication on the bus for a communication control device of the at least one other subscriber station of the bus system whose transceiver device is switched, before the predetermined time period, into an operating mode for transmitting and receiving the frame in the first communication phase.

Subscriber station for a serial bus system, and method for communication in a serial bus system

A subscriber station for a serial bus system and a method for communication. The subscriber station has a communication control device controlling a communication of the subscriber station with at least one other subscriber station of the bus system and generating a transmit signal. The communication control device generates the transmit signal according to a frame and to insert a field having a rising edge and a subsequent falling edge into the frame for the transition from a first communication phase to a second communication phase. The field has a predetermined length between the rising edge and the subsequent falling edge such that a sampling time at which a communication control device of the at least one other subscriber station of the bus system will sample the first bit of the second communication phase is situated between the rising edge and the subsequent falling edge.

A user station for a serial bus system. The user station includes a communication control device for controlling a communication of the user station with at least one other user station, and a transceiver device to serially transmit a transmission signal, generated by the communication control device, onto a bus, and serially receive signals from the bus. The communication control device generates the transmission signal according to a frame and inserts into the frame two check sums that include different bits of the frame in the computation. The communication control device inserts dynamic stuff bits into the frame in such a way that an inverse stuff bit is inserted into the bit stream of the frame after 5 identical bits in succession. The communication control device computes the two check sums so that a maximum of one of the two check sums includes the dynamic stuff bits in the computation.

User station for a serial bus system, and method for communicating in a serial bus system

A user station for a serial bus system, including a communication control device for controlling a communication of the user station with at least one other user station of the bus system, and a transceiver device for transmitting a transmission signal, generated by the communication control device, onto a bus of the bus system. The communication control device is designed to generate the transmission signal according to a frame, and to insert into the frame at least one field that is designed for checking whether the bit stream of the frame in a user station of the bus system that receives the frame is shifted by at least one bit compared to the expected frame.

An apparatus for transmitting data over a bus system, having a storage device for at least temporary storage of messages transmittable over the bus system. The apparatus is designed to check at least one message, stored in the storage device, for at least one criterion and to alter at least one portion of the message based on the check.

Apparatus for transmitting data over a bus system and operating method for that purpose

A method is described for checking the correct functioning of a serial data transmission in a bus system having at least two bus users. The bus users are connected to the bus via a bus connection unit and exchange messages via the bus. The sending access to the bus for each message is granted to a bus user via the arbitration process according to CAN standard ISO 11898-1, this bus user becoming the sender for this message. The messages have a logic structure according to the CAN standard, i.e., are composed of a start of frame bit, arbitration field, control field, data field, CRC field, acknowledge field, and end of frame field. The correct functioning of the data transmission is checked during the transmission by comparing a transmission signal, sent to the bus connection unit, to the reception signal (CAN_RX) received by the bus connection unit. The method is characterized in that a transmission signal (CAN_TX_DEL), which is delayed by a delay time (T_DELAY) compared to the transmission signal (CAN_TX), is held in the sender, and the undelayed transmission signal (CAN_TX) or the delayed transmission signal (CAN_TX_DEL) is used for checking the correct functioning of the data transmission, as a function of a switchover.

Method and device for checking the correct functioning of a serial data transmission

The disclosure relates to a method for serially transmitting frames from a transmitter to at least one receiver via a bus line and to a participant station for a bus system. In the method, stuff bits are integrated into the frame by the transmitter dependent on the values of multiple previous bits in order to generate additional signals edges. The transmitter of the frame counts the stuff bits which are integrated depending on the value of multiple previous bits, and information on the number of counted stuff bits is transmitted in the transmitted frames.

Method for serially transmitting a frame from a transmitter to at least one receiver and participants of a bus system via a bus system

A method and a filter system for filtering messages which are received, via a serial data bus of a communications network, in a communication module of a user connected to the data bus. To allow particularly simple and efficient filtering of incoming messages, even when there is a large number of filtering criteria, it is proposed that the filter system includes a list in which multiple identifier pairs are stored which define a range delimited in each case by a first identifier and a second identifier. The identifier for an incoming message is compared at least to selected identifier pairs from the list, and a query is made concerning whether the identifier for the incoming message is greater than, or greater than or equal to, the selected first identifier, and is less than, or less than or equal to, the selected second identifier. The incoming message is forwarded to the application or rejected, depending on the configuration bit specification, if the identifier for the incoming message is within the range delimited by the first identifier and the second identifier.

Method and filter system for filtering messages received via a serial data bus of a communication network by a user of the network

A method and a filter system for storing information about messages coming in via a serial data bus of a communication network in a communication module of a user connected to the data bus, which are filtered using a filter system. In order to be able to implement a particularly simple and efficient storage of information about incoming messages even in the event of a great number of filter criteria, the invention provides for the filter system to include a list, which as list elements has one or multiple filter elements, which contain storage control information, and for a check to be performed on the basis of the storage control information as to whether information about an incoming message is to be stored, and information about an incoming message is stored if the check has determined that the information is to be stored.

Method and filter system for storing information about messages coming in via a serial data bus of a communication network in a user of the network

A subscriber node of a communication system, a communication system and a method for transmitting a message in the communication system. The message is transmitted from a first subscriber node of the communication system via a data bus of the communication system to a second subscriber node of the communication system. An application program of the first subscriber node files the message, that is to be sent, in a message memory, from where it is retrieved by a communication controller, upon a sending command of the application program, and is transmitted via the data bus. In particular in the case of a cancellation of the transmission job, in order to be able to improve the capacity utilization and the efficiency of a host CPU, it is provided that a transmission event for the message, that is to be sent or that has been sent, is stored in at least one transmission event memory, that is functionally separate from the message memory, and that the application program is able to access the data stored in the event memory at any time.

Subscriber node of a communication system having a functionally separate transmission event memory

FlexRay communication controller for connecting FlexRay communication lines to a FlexRay network member assigned to the FlexRay communication controller, whereby said FlexRay communication controller encloses some parts as there are at least a message handler, a message memory, a first buffer memory structure for connecting said message memory to said FlexRay network member and a second buffer memory structure for connecting said message memory to said FlexRay communication lines, whereby all the parts are functioning together to connect said FlexRay communication lines to said FlexRay network member and said FlexRay communication controller is constructed in such a way that said functioning is controlled by the contents of a variety of registers located onto said FlexRay communication controller.

FlexRay communication controller

A method for controlling access to data of a message memory, and a message handler of a communications module having a message memory, in which data are input or output in response to an access; the message memory being connected to a first buffer configuration and a second buffer configuration, and the data being accessed via the first or the second buffer configuration; in the message handler, at least one first finite state machine being provided which controls the access to the message memory via the first buffer configuration, and at least one second finite state machine being provided which controls the access via the second buffer configuration, the at least one first finite state machine and the second finite state machine making access requests; and a third finite state machine being provided which assigns access to the message memory to the at least one first and the second finite state machine as a function of their access requests.

Message handler and method for controlling access to data of a message memory of a communications module

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.

Method and apparatus for accessing data of a message memory of a communication module

In a method for storing messages in a communications module, the messages to be stored contain first data having a first data volume and second data having a second data volume, and it is possible for the second data volume to be different per message. A message memory contains a header segment, in which the first data of the message are stored in a respective header area per message, and the message memory also contains a data segment, in which the second data of the message are stored in a respective data area per message The message memory is configured such that a division between the header segment and the data segment is variable, depending on the number of messages and the second data volume.

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Reutlingen, Germany

Franz Bailer