CAN通协议介绍.ppt

CAN Bus Hands-On Course Presented by: Intrepid Control Systems, Inc. Qin Wen Sales Engineer Tel: +86-137-6464-9956 Email: qinwen@ 骨贝灶滴猎粥釉管牌洪粳偿糙梳发赃杜看溯鳖矮听悉忆狡蠢例瞳浸稻端磺CAN通讯协议介绍CAN通讯协议介绍 Objectives Learn the basics of the CAN protocol Understand what makes up a CAN network Understand what makes up a CAN node Learn how CAN compares to competitive protocols Learn how to use a CAN test tool and a CAN Database (DBC) file to monitor and transmit CAN messages and signals 杉奈钉睁旧胃廓海矽诫又翰晒裔匿收薪较琶啪碌铸赶谭瞳频葱抹笨仰豆擂CAN通讯协议介绍CAN通讯协议介绍 Agenda Part 1: Learn the high level CAN features Part 2: Understand the CAN message Part 3: Understand how messages are communicated between CAN nodes 纬联伍哪竣洁呛织栖制端量细麓泡党芯梗操蔓缺歇讹瞄踞接肌媒潍佳技宴CAN通讯协议介绍CAN通讯协议介绍 Part 1:The Big Picture 噎一冰雏二淆闪尔吾佯悔屿绪胡机删涧梗执腿悄烤秆饲至诬痢鹿功芦十蚀CAN通讯协议介绍CAN通讯协议介绍 What is CAN? Stands for: Controller–Area Network Development of the CAN-bus started originally in 1983 at Robert Bosch GmbH The protocol was officially released in 1986 at the Society of Automotive Engineers (SAE) congress in Detroit 轿收船滓秩棍关蔷柜柞发铱塞霄哇退贪宙椰伙匠剩斡鞭庐翼靛翱壤寨建欣CAN通讯协议介绍CAN通讯协议介绍 CAN Key Features Speed up to 1Mbps Non-destructive message arbitration All nodes receive all messages No guaranteed message latency 穗甫瑞镰瓢渠斤譬债临网箭遁从翻暮坷近禁避随过担祖务覆纱晴枚札眺丈CAN通讯协议介绍CAN通讯协议介绍 Cost vs Data Rate LIN CAN FlexRay MOST 1 2 5 10 Relative cost per node Data rate [bps] 20K 1M 10M 25M 世取米嘻错浴死循世慰钥炔唾锚播躁享检傈怀掣诧蛔伯筷脚钝牧倘呼侈鸳CAN通讯协议介绍CAN通讯协议介绍 CAN vs LIN CAN is much faster: up to 1 Mbps LIN offers a time deterministic model CAN offers a more powerful checksum Uses LDF instead of DBC files for databases 原蛤哎锑敝惯弘颖怕毯萄杀键楚糖瓷浸瞻境道草矩狂出浓惧蛰九磨皮咒周CAN通讯协议介绍CAN通讯协议介绍 CAN vs FlexRay FlexRay network startup more complicated FlexRay offers time deterministic communications FlexRay offers fault tolerance using various mechanisms FlexRay offers larger data frames Uses FIBEX instead of DBC files 蚂己义欣古阀钉鲜硬萝才免捎示嫂柯虽底彭膘孩糜良固韩甸嚎千价衫蚕水CAN通讯协议介绍CAN通讯协议介绍 CAN vs MOST MOST