Friday, 26 March 2021 16:07

CAN总线字节序

Motorola格式与Intel格式
具体看NL_OBD_SendCANFrame函数关于ISO15765-4协议这部分代码的实现。
ISO15765-4 读故障码
在NL_OBD_SendCANFrame函数的支持下,OBD诊断程序的开发就会变得简单,我们只需关注ISO15031-5协议的功能实现即可,网络层,数据链路层等底层处理由NL_OBD_SendCANFrame函数完成。
气体检测仪常见气体
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脱离枯燥的理论来感受ISO15765-4协议
Monday, 04 May 2020 17:19

ISO 15765 协议下载

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Friday, 01 May 2020 22:03

Lin protocol download

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The parameter dataIdentifier (DID) logically represents an object (e.g., Air Inlet Door Position) or collection of objects. This parameter shall be available in the server's memory. The dataIdentifier value shall either exist in fixed memory or temporarily stored in RAM if defined dynamically by the service dynamicallyDefineDataIdentifier. In general, a dataIdentifier is capable of being utilized in many diagnostic service requests including 0x22 (readDataByIdentifier), 0x2E (writeDataByIdentifier), and 0x2F (inputOutputControlByIdentifier). A dataIdentifier is also used in various diagnostic service responses (e.g., positive response to service 0x19 subfunction readDTCSnapshotRecordByDTCNumber).
IMPORTANT — Regardless of which service a dataIdentifier is used with, it shall consistently
represent the same thing (i.e., a given object with a given size / meaning / etc.) on a given ECU.

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