US 11,868,293 B2
Device for a user station of a serial bus system, and method for communicating in a serial bus system
Arthur Mutter, Neuhausen (DE); and Florian Hartwich, Reutlingen (DE)
Assigned to ROBERT BOSCH GMBH, Stuttgart (DE)
Appl. No. 17/638,935
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Aug. 24, 2020, PCT No. PCT/EP2020/073598
§ 371(c)(1), (2) Date Feb. 28, 2022,
PCT Pub. No. WO2021/047894, PCT Pub. Date Mar. 18, 2021.
Claims priority of application No. 10 2019 213 926.4 (DE), filed on Sep. 12, 2019.
Prior Publication US 2022/0292036 A1, Sep. 15, 2022
Int. Cl. G06F 13/40 (2006.01); G06F 13/42 (2006.01); G06F 13/376 (2006.01)
CPC G06F 13/376 (2013.01) [G06F 13/4022 (2013.01); G06F 13/4282 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A device of a user station, which is one of a plurality of user stations of a serial bus system, comprising:
circuitry coupled to lines of a bus of the bus system, by which a signal is receivable from the bus of the bus system, the signal being based on a transmission signal via which a message is exchanged between the user stations of the bus system; and
a processor, wherein the processor is configured to:
in a first communication phase in which in the signal different values are provided by a recessive bus state and a dominant bus state, interpret the received signal using a first reception threshold; and
in a second communication phase in which in the signal different values are provided without the recessive bus state, interpret the received signal using a second reception threshold; and
responsive to a connection of the user station to the bus system being initiated after others of the user stations have been communicating via the bus system without recognition by the user station of which of the first and second communication phases is currently active on the bus system:
begin operation of the user station according to the second communication phase; and
switch operation of the user station from the second communication phase, in which the second reception threshold is used, into the first communication phase, in which the first reception threshold is used, upon detection of a level of the signal being above a third reception threshold for a predefined amount of time, the third reception threshold being different than the first and second thresholds.