当前位置:网站首页>[UDS unified diagnostic service] i. overview of diagnosis (4) - basic concepts and terms
[UDS unified diagnostic service] i. overview of diagnosis (4) - basic concepts and terms
2022-04-23 06:39:00 【Tomorrow is like noon】
One 、 Diagnostic overview (4)— Basic concepts and terms
1. Client and server
client (Client)
The originator of the diagnostic request –Tester( Diagnostic instrument 、 Upper computer ), Send a diagnostic request
Server side (Server)
Provider of diagnostic response – Some ECU, Send diagnostic response
Remote client / The server (Remote Client /Server)
And Server (Client) Not in the same “ Network segment ”
2. Data transmission related
Protocol data unit (PDU)【Protocal Data Unit】
Protocol data unit is a set of information and data , It represents the information and data transmitted between the sender and the receiver peer entities .
The protocol data unit includes :
- Protocol control information (PCI)【Protocal Control Informaiton】
- data (Data)
Single frame transmission
Data length <6/7 Bytes
Message type :
- A single frame (SF)【Single Frame】
Multi frame transmission
Data length >6/7 Bytes , Most allow 4095 Bytes
Message type :
- First frame (FF)【First Frame】: Describe the beginning of the transmission
- Flow control frame (FC)【Flow Control】: During transmission , Message flow control port
- Consecutive frames (CF)【Consecutive Frame】: To transmit data
3. Communication related
Physical communication (1:1)
Scenario of physical addressing communication , And one-to-one diagnostic communication between client and server .
Functional communication (1:N)
The scenario of communication using functional addressing , And the communication mode in which the client sends diagnostic requests of the same function to multiple servers .
source address (SA)【SourceAddress】
Sending node address
Destination address (TA)【TargetAddress】
Receiving node address
4. Structure of automobile diagnosis system
版权声明
本文为[Tomorrow is like noon]所创,转载请带上原文链接,感谢
https://yzsam.com/2022/04/202204230546376974.html
边栏推荐
- 根据SQL语句查询出的结果集,将其封装为json
- MySQL groups are sorted by a field, and the first value is taken
- 【踩坑】Win11 WSL2 中 meld 无法正常使用问题修复
- Linux 用rpm的方式安装mysql(超简单)
- 用C语言实现重写strcmp等四个函数
- 日志
- 共用数据的保护
- Rust:单元测试(cargo test )的时候显示 println 的输出信息
- 【UDS统一诊断服务】一、诊断概述(1)— 诊断概述
- [UDS unified diagnostic service] IV. typical diagnostic service (5) - function / component test function unit (routine function unit 0x31)
猜你喜欢
随机推荐
【UDS统一诊断服务】五、诊断应用示例:Flash Bootloader
[opencv] use filestorage to read and write eigenvectors
【UDS统一诊断服务】四、诊断典型服务(4)— 在线编程功能单元(0x34-0x38)
【UDS统一诊断服务】二、网络层协议(2)— 数据传输规则(单帧与多帧)
PHP junior programmers, take orders and earn extra money
C语言进阶要点笔记3
Latex configuration and use
Jeu de devinettes
Rust 中的 RefCell
根据SQL语句查询出的结果集,将其封装为json
【UDS统一诊断服务】(补充)五、ECU bootloader开发要点详解 (2)
类和对象的初始化(构造函数与析构函数)
1007 go running (hdu6808) in the fourth game of 2020 Hangzhou Electric Multi school competition
Export the articles written in CSDN to PDF format
C#【文件操作篇】PDF文件和图片互相转换
Object array and object pointer
C#【文件操作篇】按行读取txt文本
拷贝构造函数
修改注册表的值
gst-launch-1.0用法小记