Terminology » FlexRay Bus Frame Analysis & Data Logger Tool

FlexRay Bus Frame Analysis & Data Logger Tool

automotive flexray frame protocol analyzer tool

Introduction : The FlexRay protocol is designed for high speed, deterministic communication in vehicles, offering dual channels and time triggered communication cycles. It is designed to meet the demands of advanced driver assistance and safety systems.

FlexRay Frame Structure

A FlexRay frame consists of a header, payload and trailer. The header contains control information like the Frame ID, payload length, header CRC and cycle count. The payload carries the actual data, which can be up to 254 bytes, and the trailer provides additional error detection.

FlexRay Frame Structure

Field	Size	Purpose with Description
Header	5 bytes (40 bits)	Pls. check table below for its fields.
Payload	up to 127 words (254 bytes)	contains the actual data transferred by the frame. This is about thirty times greater compared to CAN.
Trailer	three 8-bits (i.e. 3 bytes)	Used for error detection

FlexRay Header Fields

Header Fields	Size	Description
Status Bits	5 bits	These are indicator bits that define specific properties and the purpose of the frame. They are used by the communication controller for various functions, including network management, synchronization and error handling. These are reserved bit, payload preamble indicator (PPI), Null Frame Indicator (NFI), Sync Frame Indicator (SFI) and Startup Frame Indicator (SUFI).
Frame ID	11 bits	Defines slot in which frame should be transmitted. It helps to prioritize event triggered frames.
Payload Length	7 bits	Contains number of words which are transferred in the frame.
Header CRC	11 bits	Used to detect errors during transfer.
Cycle Count	6 bits	Contains the value of a counter that advances incrementally each time a Communication Cycle starts.

FlexRay Protocol data logger tool

Manufacturers	Product with features
Intrepid Control Systems	neoVI FIRE 3 FlexRay : It is vehicle interface and data logger for FlexRay, CAN-FD and LIN protocols.
G.i.N. GmbH	Products such as GL4000 / GL4200 and GL5300 series supports flexray and other automotive protocols.
TTTech Automotive	The company has gateway testing tool for CAN and flexray.
STAR COOPERATION	FlexConfig Analyzer : This software visualizes CAN, LIN and FlexRay data on mobile devices (e.g. tablet, phone) and supports logging.
Prodigy Technovations	FlexRay Protocol Decode and SI Analysis Software

Summary: A FlexRay packet data logger tool is vital for capturing, analysing and validating the complex timing and structural aspects of FlexRay frames. It ensures deterministic behaviour, fault tolerance and performance in next generation vehicle networks.