AUTOSAR
What is AUTOSAR? AUTOSAR (AUTomotive Open System ARchitecture) is a worldwide development partnership of automotive manufacturers, suppliers, and other companies in the electronics, semiconductor, and software industries. AUTOSAR standards are designed for software standardization, reuse, and interoperability. AUTOSAR has implemented a layered architecture similar to OSI model. It has different layers to handle and abstract different operations of…
Software-Defined Vehicles – A Forthcoming Industrial Evolution
What Is a Software-Defined Vehicle? A Software-Defined Vehicle is any vehicle that manages its operations, adds functionality, and enables new features primarily or entirely through software. it reflects the gradual transformation of automobiles from highly electromechanical terminals to intelligent, expandable mobile electronic terminals that can be continuously upgraded. To become such intelligent terminals, vehicles are…
Software Testing Types
Software testing plays a vital role in ensuring the quality, reliability, and performance of software applications. It covers a diverse range of testing types, each designed to address specific aspects of a software system. Based on actions: a. Manual Testing: Manual testing is the process of executing test cases and scenarios without the assistance of…
The Beginning
Introduction to Diagnostics “Gaining Knowledge is first step to wisdom. Sharing it ,is the first step to humanity” -Unknown. This is the first post on my new blog “Automotive Diagnostics”. Diagnostics , OBD-2 , CAN Protocol , CAN FD , Ethernet , Automotive Ethernet ,OSI Layers, VLAN and DOIP. Some of This very hot Buzz…
Overview of Diagnostics
Introduction An automobile as we know it was not invented in a single day by a single inventor. It is more than an engine and a body; it is a complex machine that has undergone over a century of evolution Detecting a failure in this complex machine would be a tedious task. However, most of…
Unified Diagnostic Services (UDS)
What is Unified Diagnostic Service (UDS) Protocol? With rapid implementation of electronic embedded systems in vehicles, the need to track and control the vehicle’s different parameters was imperative. Thus, diagnostic systems were developed so that the clients (designers, testers, and mechanics) could detect the faults in the vehicle by connecting their diagnostic tester tool to…
Vehicle Bus System & CAN Protocol Part-1
What is BUS Systems And Why Required? In past electronic devices in vehicles are connected via point to point wiring system. More Electronic in vehicle which resulted in bulky wire harnesses that were expensive and heavy too and if new nodes need to be introduced, it will be very difficult and complex. In electronic systems…
CAN Protocol Part-2
Types of CAN Communication Protocol High-Speed/FD CAN: High-speed CAN is by far the most common physical layer. High-speed CAN networks are implemented with two wires and allow communication at transfer rates up to 1 Mbit/s. Other names for high-speed CAN include CAN C and ISO 11898-2. Typical high-speed CAN devices include antilock brake systems, engine…
CAN Protocol & CAN FD Part-3
Message Addressing And Identification It is worth noting once again that there is no explicit address in the CAN messages. Each CAN controller will pick up all traffic on the bus, and using a combination of hardware filters and software, determine if the message is “interesting” or not. In fact, there is no notion of…
Ethernet
History: On May 22, 1973, while working at the Xerox Palo Alto Research Center (PARC) in California, Bob Metcalfe wrote a memo describing the network system he had invented for interconnecting advanced computer workstations called Xerox Altos. The era of open computer communications based on Ethernet technology formally began in 1980 when the Digital Equipment…
OSI Model
Protocols and Standards A network is basically all of the components (hardware and software) involved in connecting computers and applications across small and large distances. When designing and maintaining a network, remember these factors: cost, security, speed, topology, scalability, reliability, and availability some of the more common networking applications include e-mail applications for sending mail electronically, File…
Encapsulation-Decapsulation & Different Standard Ethernet Frame Formats
ENCAPSULATION AND DE-ENCAPSULATION As this information is passed from higher to lower layers, each layer adds information to the original data—typically a header and possibly a trailer. This process is called encapsulation Generically speaking, the term protocol data unit (PDU) is used to describe data and its overhead. Going Down the Protocol Stack The first thing that occurs…
TCP/IP Protocol & Frame Structure of IP
Introduction Internet addresses allow any machine on the network to communicate with any other machine on the network. TCP/IP provides facilities that make the computer system an Internet host, which can attach to a network and communicate with other Internet hosts The TCP/IP protocol stack actually doesn’t define the components of the network access layer…
Transport Layer Protocols TCP-UDP
Transmission Control Protocol TCP uses a reliable delivery system to deliver layer 4 segments to the destination. This would be analogous to using a certified, priority, or next-day service with the US Postal Service. For example, with a certified letter, the receiver must sign for it, indicating the destination actually received the letter: Proof of…
ARP (Address Resolution Protocol)
ARP (Address Resolution Protocol) is a network protocol used to find out the hardware (MAC) address of a device from an IP address. It is used when a device wants to communicate with some other device on a local network (for example on an Ethernet network that requires physical addresses to be known before sending…
Complete End-End connection Establishment
10.0.1.0/24 PC-A, Switch-A, and Router-A 10.0.2.0/24 Router-A, Hub-A, and Router-B 10.0.3.0/24 Router-B, Switch-B, and PC-B Goal : How PC-A acquires its IP addressing information using DHCP, how DNS works to resolve names, how PC-A and PC-B use TCP to perform telnet, how the three-way handshake occurs, how the switches switch frames, and how the routers…
Establishment of a TCP connection, state diagram
Short introduction to TCP protocol The TCP protocol is used by a large majority of client/server applications like the millions of Internet Web servers. TCP stands for Transmission Control Protocol and works on the transport network IP (Internet Protocol). TCP is used to exchange data reliably through mechanisms of sequence and acknowledgment, error detection, error…
Vlan
A VLAN is a group of devices in the same broadcast domain or subnet. VLANs are good at logically separating/segmenting traffic between different groups of users. VLANs contain/isolate broadcast traffic, where you need a router to move traffic between VLANs. VLANs create separate broadcast domains: they increase the number of broadcast domains, but decrease the…
IPv4 – Addressing
An IP address is an address used in order to uniquely identify a device on an IP network. The address is made up of 32 binary bits, which can be divisible into a network portion and host portion with the help of a subnet mask The 32 binary bits are broken into four octets (1…
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