andthinker

Embedded C interview Question in Bosch Hi i am posting  Embedded C interview Question asked Bosch . Embedded C is widely used in Automotive domain.Bosch is the biggest manufacture of automotive component and software. Impotent topics in Embedded C : Conversions between Different Basis; Data Representations in Computers; Elements of Boolean Logic; Straight-Line Equation and Linear Interpolation; Basic Operations with Vectors and Matrixes; Number Representations in Computer Memory: Little Endian vs. Big Endian; Optional:  Error Detection Codes. Introduction to the C Language What is a Programming Language? What is a Compiler? The C Language and its Advantages. C Syntax and Constructs. The Structure of a C Program. Steps to Compile a Program Compilation Phases; Multi-File Compilation; Header Files; The Linking Process; Building an Executable Version of a C Program; Debugging a C Program; Examining and Running a C Application Program. Data Types and Variables Data Types; T...

What is OBD? Techblog at OBD2 and uds protocol - 5 weeks ago What is OBD? *OBD* is *On-board diagnostic* means self-diagnosing and self-reporting problems in the car or vehicle. When you’re purchasing a vehicle or car , two terms that will come one is OBD1 and *OBD2*.Nowadays day *OBD1* is not coming its in only old vehicle. For example, if your vehicle have a high-end OBD system(OBD2), and it has a problem, the OBD system will do self-diagnose, or ‘tell’ the car driver or repair technician that what problem is in the car. The *difference between OBD1 and OBD2*. With OBD1, the goal was to develop a diagnostics system which focuses on the ... more »

On-board diagnostics 2 or OBD2 Techblog at OBD2 and uds protocol - 4 weeks ago *On-board diagnostics 2 *or OBD2 In my previous post i have explained *what is ODB? OBD* is nothing but it helps the owner and technician to find out the what is problem in vehicle.*OBD2* is the advance version of OBD1, OBD-II is the protocol used by all cars built after 1996 In *OBD2 *lot of improvement is done compared to OBD1 ,improvement is like standardization,signaling,diagnostics protocols ect. *OBD 2 connector are standardized*: In OBD 1 Each manufacturer used their own diagnostic link connector (DLC), DLC location, DTC definitions, and procedure to read the DTCs ... more »

What is UDS protocol Techblog at OBD2 and uds protocol - 4 weeks ago What is UDS protocol *UDS* *protocol *is the one of the diagnostic protocol.It is widely used in automotive industry.It is codified in ISO 14229-1 standard.*UDS* *protocol* helps technician,manufactures,service center,programmers diagnose the problem in ECU. What is the use of UDS protocol - UDS protocol is used to repair the vehicle and get the DTC code. - Analysis of vehicle while running and after manufacturing - Research on vehicle systems like ABS,airbag etc - Reprogramming the ECU - Change the configuration of the ECU. - Change the NVM configured values. U... more »

Vehicle Diagnostics or Automotive Diagnostics Techblog at OBD2 and uds protocol - 4 weeks ago *Vehicle Diagnostics or Automotive Diagnostics* The automobile as we know it was not invented in a single day or a single man. It is a complex machine that has over a century of innovation. Detecting a failure in this complex machine would be a difficult task. However, most of the vehicles today include ECU (Electronic Control Unit (ECU)), which connected several sensors, it will always monitor the sensor value, located throughout the engine, fuel and wheel speed, exhaust systems. When the ECU in the vehicle detects a fault or a problem, First, a warning light on the dashboard is se... more »

Diagnostic Communication Techblog at OBD2 and uds protocol - 5 days ago Diagnostic Communication Communication in Automobiles: *In-Vehicle Communication* is achieved through various means by using different protocols like Communication Manager (COM) etc*Tester Communication* could be used for Diagnostics, Application/Calibration, Measurement, Flash Programming . more >>

Event Data Recorder (EDR) What is EDR ? Event data recorder (EDR) means a functionality to record data captured prior to, during, and after an Event. example : event means any event like crash ,deployment of air bag, or sudden break ect . Event Data Recorder (EDR) will record the set of sensor data during the event or after or prior event.Set Senor data will vary from one event to other event. Purpose of EDR? Storage of specified data in non volatile memory in order to analyse and reconstruct events (no deployment/ deployment events) and also required by Regulation like NHTSA. Analysis necessary for liability reasons concerning the car manufacturer or restraint system supplier or to solve statement contradictions of accident opponents. Collection of statistical crash data for effective crash investigations and   analysis of safety equipment performance to improve traffic safety. Event Definitions: Event Start (T0) : Point at which first algorithm is active...

Vehicle Safety System: Vehicle Safety System will helps to driver while driving and time when vehicle got crashed. 2 type of Vehicle Safety system 1.Active Safety 2.Passive Safety   Active Safety: Passive Safety

Airbag in Automotive The airbag is the one type of Vehicle Safety device.The airbag will help and save driver and passenger when vehicle crashed. Vehicle Safety System: Vehicle Safety System will helps to driver while driving and time when vehicle got crashed. 2 type of Vehicle Safety system 1.Active Safety 2.Passive Safety Airbag will come Under active safety system Airbag is the device connected with sensor which will always  monitor Crash of vehicle and precrash of vehicle, when crash is happen then  deploy the airbag. Deploying the airbag is nothing but fill the air in the airbag.     Cars are designed with a rigid, strong frame enclosing the occupants, with crumple zones in the front.     Force reduction and redistribution is accomplished inside the passenger compartment through the use of Airbags(irreversible restraints) and Seat-Belts and (reversible restraints) and rear.  It's ea...