Automobile communication protocol

Friday, 27 May 2022 11:06

MQB-sniffer for Volkswagen Golf MK7

CAN-BUS sniffing for Volkswagen Golf MK7 (and most likely other MQB platform cars). Currently this is more a work log for future reference.

Published in Automobile communication protocol

Friday, 13 May 2022 16:20

电动汽车上CAN报文解析

常用车辆CAN总线通讯协议，大多直接采用SAE-J1939的形式制定。电动汽车首先遇到了电池系统，电机系统等新加入电气需要重新设定PGN码等问题。CAN协议始终处在诸侯割据的状态。在过去的几年中，国家及相关机构也一直在对电动汽车的CAN通讯协议进行研究，希望形成统一的协议体系。统一的CAN协议，首先是零部件供应商的福音。当前主流主机厂，每家都有自己的整车通讯协议，各个供应商，需要根据整车厂的定义，修改零部件的CAN协议。

制定电动汽车的CAN协议，基本的思路是在SAE-J1939的基础上，根据自身电动汽车的需求，做出必要的调整。

Published in Automobile communication protocol

Tuesday, 30 November 2021 08:47

ISO 11898-2003 download

download

Published in 11898

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Friday, 19 November 2021 21:27

NXP S32K146 Evaluation Board

Published in NXP

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Saturday, 09 October 2021 21:26

CAN Network layer from ISO 15765-4

Network layer

Published in J15765

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Saturday, 09 October 2021 15:58

Network Iayer interface and Standardized diagnostic CAN identifiers from 15765-3

7 Network Iayer interface
8.Standardized diagnostic CAN identifiers

Published in J15765

Download attachments:

ISO_25765_3_7_8.pdf

Saturday, 09 October 2021 14:13

Mapping of the N_PDU fields - from ISO15765-2

Addressing formats

The exchange of network layer data is supported by three addressing formats: normal, extended and mixed addressing. Each addressing format requires a different number of CAN frame data bytes to encapsulate the addressing information associated with the data to be exchanged. Consequently, the number of data bytes transported within a single CAN frame depends on the type of addressing format chosen.

The following (7.3.2 to 7.3.5) specifies the mapping mechanisms for each addressing format, based on the data link layer services and service parameters defined in ISO 11898-1.

Published in J15765