Transceiver device and communication control device for a user station of a serial bus system, and method for communicating in a serial bus system

Patent metadata

Field	Value
Publication number	US-11989151-B2
Application number	US-202117792186-A
Country	US
Kind code	B2
Filing date	Jan 18, 2021
Priority date	Jan 23, 2020
Publication date	May 21, 2024
Grant date	May 21, 2024

Abstract

A transceiver device, communication control device, and method for a user station of a serial bus system. The transceiver device includes a first terminal for receiving a transmission signal from a communication control device, a transmission module for transmitting the transmission signal onto a bus, a reception module for receiving the signal from the bus, the reception module configured to generate a digital reception signal from the signal received from the bus, a second terminal for sending the digital reception signal to the communication control device and for receiving an operating mode changeover signal from the communication control device, and a changeover feedback block for outputting feedback regarding a changeover of the operating mode that has taken place based on the operating mode changeover signal. The changeover feedback block is configured to output the feedback to the communication control device via the second terminal and in the digital reception signal.

First claim

What is claimed is:

1. A transceiver device for a user station of a serial bus system, the transceiver device comprising:
a first terminal configured to receive a transmission signal from a communication control device;
a transmission module configured to transmit the transmission signal onto a bus of the bus system, in which bus system at least one first communication phase and one second communication phase are used for exchanging messages between user stations of the bus system;
a reception module configured to receive a signal from the bus, the reception module being configured to generate a digital reception signal from the signal received from the bus;
a second terminal configured to send the digital reception signal to the communication control device and to receive an operating mode changeover signal from the communication control device; and
a changeover feedback block configured to output feedback regarding a changeover of an operating mode that has taken place as a result of the operating mode changeover signal, the changeover feedback block being configured to output the feedback to the communication control device via the second terminal and in the digital reception signal.

2. The transceiver device as recited in claim 1 , wherein the changeover feedback block includes:
an operating mode detection module configured to detect, based on output signals of the transmission module and of the reception module, which operating mode the transmission module and the reception module are switched into; and
an operating mode feedback module configured to evaluate an operating mode status signal that is output by the operating mode detection module, and to evaluate a status signal of an operating mode changeover block that is configured to carry out the changeover of the operating mode based on the operating mode changeover signal.

3. The transceiver device as recited in claim 2 , wherein the operating mode feedback module is configured to decide whether the operating mode feedback module must provide the feedback to the communication control device via the digital reception signal, and when the feedback must be sent.

4. The transceiver device as recited in claim 2 , wherein:
the operating mode feedback module is configured to insert the feedback into the digital reception signal after the changeover of the operating mode that has been signaled via the operating mode changeover signal, or
the operating mode feedback module is configured to insert the feedback into the digital reception signal after the operating mode changeover signal, but before the changeover of the operating mode that has been signaled via the operating mode changeover signal.

5. The transceiver device as recited in claim 2 , wherein the operating mode feedback module is configured to insert the feedback into the digital reception signal as at least one pulse having a value that is an inverse of a value of the digital reception, the pulse having a predetermined absolute duration or the pulse is configured in such a way that the pulse in the digital reception signal overwrites a value whose duration in the digital reception signal is limited by a distance between two arbitrary edges of the digital reception signal.

6. The transceiver device as recited in claim 5 , wherein the at least one pulse lasts at the bus up to a subsequent edge change that follows in the digital reception signal.

7. The transceiver device as recited in claim 5 , further comprising:
an operating mode changeover block configured to evaluate the operating mode changeover signal that is received from the communication control device at the second terminal and to evaluate the transmission signal, the operating mode changeover block being configured to switch the transmission module and/or the reception module into one of at least three different operating modes based on a result of the evaluation.

8. The transceiver device as recited in claim 7 , wherein the operating mode changeover signal received from the communication control device at the second terminal is a pulse having a value that is an inverse of a value of the digital reception signal, the operating mode changeover block being configured to switch the reception module from a first operating mode into a second operating mode when the changeover signal includes the pulse, and a value of the transmission signal corresponds to a value of the pulse, the operating mode changeover block being configured to switch the transmission module and the reception module from the first operating mode into a third operating mode when the changeover signal includes the pulse and the value of the transmission signal is an inverse of the value of the pulse, the transceiver device in the second operating mode not being a sender of a message in the second communication phase, and the transceiver device in the third operating mode being the sender of the message in the second communication phase.

9. The transceiver device as recited in claim 2 , wherein the operating mode feedback module is configured to configure the feedback as manipulation of the digital reception signal in such a way that the digital reception signal has a constant value up to a predetermined event.

10. The transceiver device as recited in claim 9 , wherein the predetermined event is: (i) a new signaling of the changeover of the operating mode, using the operating mode changeover signal, or (ii) a predetermined passage of time in the transceiver device.

11. The transceiver device as recited in claim 1 , wherein the transmission module is configured to drive bits of the transmission signal onto the bus in the first communication phase with a first bit time that is longer by at least a factor of 10 than a second bit time of bits that are driven by the transmission module onto the bus in the second communication phase, wherein the operating mode changeover signal, via the second terminal for signaling that the changeover of the operating mode is to be made, includes: (i) at least one pulse with a duration that is shorter than the first bit time and longer than the second bit time, or (ii) at least one pulse with a pulse duration that is approximately equal to the second bit time or shorter than the second bit time, and wherein the feedback via the second terminal for signaling that the operating mode has been changed over includes: (i) at least one pulse with a duration that is shorter than the first bit time and longer than the second bit time, or (ii) at least one pulse with a pulse duration that is approximately equal to the second bit time or shorter than the second bit time.

12. The transceiver device as recited in claim 1 , wherein the signal received from the bus in the first communication phase is generated with a different physical layer than the signal received from the bus in the second communication phase.

13. The transceiver device as recited in claim 1 , wherein in the first communication phase, it is negotiated which of the user stations of the bus system in a subsequent second communication phase obtains, at least temporarily, exclusive, collision-free access to the bus.

14. A communication control device for a user station of a serial bus system, comprising:
a communication control module configured to generate a transmission signal for controlling a communication of the user station with at least one other user station of the bus system, in which bus system at least one first communication phase and one second communication phase are used for exchanging messages between user stations of the bus system;
a first terminal configured to send the transmission signal to a transceiver dev

Assignees

• Bosch Gmbh Robert

Inventors

• Mutter Arthur
• Hartwich Florian
• Walker Steffen

Classifications

• G06F13/4282 Primary

  on a serial bus, e.g. I2C bus, SPI bus (on daisy chain buses G06F13/4247) · CPC title

• G06F13/4022

  using switching circuits, e.g. switching matrix, connection or expansion network (G06F13/4009 takes precedence) · CPC title

• H04L12/40013 Primary

  Details regarding a bus controller · CPC title