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

US10146725B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Florian Hartwich · Reutlingen, DE
• Franz Bailer · Messingen, DE
• Christian Horst · Dußlingen, DE
• Arthur Mutter · Hamberg, DE

Key dates

• Filing date: Aug 24, 2012
• Grant date: Dec 4, 2018
• Expiry date: Apr 24, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L2012/40215
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

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 tra…