Subscriber station for serial bus system and method for communicating in serial bus system
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A bus system and serial bus technology, which are applied to user stations used in serial bus systems and used in the field of communication in serial bus systems to achieve the effects of improving transmission rate and high functional reliability
Pending Publication Date: 2022-07-08
ROBERT BOSCH GMBH
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[0012] If the CRC calculation is performed in the same way in the case of CAN XL as in the case of CAN FD, CAN XL may have the same disadvantages as CAN FD
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[0044] As an example, figure 1 A bus system 1 is shown, which is basically designed in particular for a CAN bus system, a CAN FD bus system, a CAN XL bus system and / or their variants, as described below. The bus system 1 can be used in vehicles, in particular motor vehicles, in airplanes or the like, or in hospitals or the like.
[0045] exist figure 1 Here, the bus system 1 has a large number of subscriber stations 10, 20, 30, which are connected to a bus 40 with a first bus core 41 and a second bus core 42, respectively. The bus cores 41, 42 may also be called CAN_H and CAN_L or CAN-XL_H and CAN-XL_L, and are used for inputting a dominant level or generating a recessive or other level for the signal coupling in the transmit state. electrical signal transmission. The messages 45 , 46 in the form of signals can be transmitted serially between the individual subscriber stations 10 , 20 , 30 via the bus 40 . If an error occurs in the case of communication on the bus 40, such...
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Abstract
A subscriber station (10; 30) for a serial bus system (1) and a method for communicating in a serial bus system (1) are provided. The subscriber station (10, 30) has a communication control device (11, 31) for controlling communication of the subscriber station (10, 30) with at least one other subscriber station (10, 20, 30) of the bus system (1), and a transmitting / receiving device (12; 32), which is designed to communicate with the communication control device (11; 31) is serially transmitted to a bus (40) of the bus system (1), and the transmitting / receiving device is designed to serially receive signals from the bus (40) of the bus system (1), the communication control device (11; 31) is designed to be designed as a function of the frame (450; 4501, 4502; 4502) and generating a transmit signal (TXD) in a frame (450; 4501, 4502; 4502), two checksums (HCRC, FCRC) are inserted into the frame (450; 4502), said two checksums taking into account the frame (450; 4501, 4502; 4502), wherein the communication control device (11; 31) is designed to be in the frame (450; 4501, 4502; 4502), such that opposite padding bits are inserted into the frame (450; 4502) after successive five identical bits; 4501, 4502; 4502), and wherein the communication control device (11; according to the invention, at least two checksums (HCRC, FCRC, 31) are designed to calculate two checksums (HCRC, FCRC) such that at most one of the two checksums (HCRC, FCRC) takes into account the dynamic padding bits.
Description
technical field [0001] The invention relates to a subscriber station for a serial bus system and to a method for communicating in a serial bus system with high data rates and great flexibility and excellent resistance to Wrong ability to work. Background technique [0002] A bus system for communication between sensors and control devices (eg in a vehicle) should enable the transmission of large amounts of data depending on the technical installation or the number of functions of the vehicle. Here, data is often required to be transferred from sender to receiver faster than hitherto, and large data packets can also be transferred when required. [0003] In the case of vehicles, the bus system is currently in the introduction phase, where data is transmitted as messages in the ISO11898-1:2015 standard as the CAN protocol specification using CAN FD. These messages are transmitted between the bus users of the bus system, such as sensors, control devices, transmitters, etc., f...
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