Teledyne LeCroy FlexRay Trigger, Decode and Physical Layer Test - Manual (Page 4)

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FlexRay-TDP-OM-E Rev A
INTRODUCTION
Several communication protocol types are used in automotive applications. They are used to send data from
sensors to electronic control units (ECUs) or from one ECU to another. These protocol types include Controller
Area Network (CAN), Local Interconnect Network (LIN) and FlexRay. LIN is a low-cost master/slave system
designed for low-cost implementation in vehicles, typically in what is commonly referred to as “body electronics.”
FlexRay is a time-triggered automotive communications bus designed for higher speeds and fault tolerance.
This manual focuses on the FlexRay TDP, TD and D products; LeCroy also has separate CAN and LIN products
and manuals.
Overview
FlexRay bus TDP, TD and D options contain powerful software algorithms which extract serial data information
from physical layer waveforms measured on your oscilloscope. The extracted information is overlaid (annotated)
on the actual physical layer waveforms, and color-coded to provide fast, intuitive understanding.
This is especially helpful for FlexRay, an emerging standard many engineers are just starting to use.
The FlexRaybus TDP and TD options allow triggering on TSS (Start), Frame, Symbol or Errors. Frame triggering
can be set conditionally to select a range of Frame ID values to trigger on, not just a single ID. Other powerful and
user-friendly features included in FlexRaybus trigger include:
• Ability to trigger and decode FlexRay protocol version 2.1 at 10 Mb/s, 5 Mb/s or 2.5 Mb/s
• Ability to create powerful Frame triggers including Cycle Count and Frame Qualifiers
• Triggering on FSS, BSS, FES, Header CRC and Payload CRC errors as well as CID, CAS/MTS and Wakeup
Pattern Symbols
The FlexRay TDP, TD and D Serial Data options are unique oscilloscope tools from LeCroy that greatly increase
your ability to debug and analyze embedded controllers that use FlexRay. The D products are Serial Decode only,
and the TD products include Serial Trigger and Decode. The TDP product is the superset of all capabilities and
includes the Trigger, Decode and Physical layer test.
Physical layer test using the FlexRay TDP product consists of Eye Diagram Testing and Physical Layer Timing
Measurements. The FlexRay trigger is integrated into the oscilloscope – no external hardware is used – and is
selected through the normal oscilloscope trigger menus. FlexRay signals are sent to the oscilloscope using a
differential probe like the ADP305 or AP033. Decoding is accessed from the Analysis pull-down menu. The
decoding is overlaid on top of the appropriate channel, and is intuitively presented and color-coded for quick
understanding. Physical layer test including eye diagrams and measurement parameters are accessed through
the Physical Layer tab in the Decode Setup. All packages contain Search capability for specific IDs, Frames and
Errors and a Table displays summarized protocol data underneath the oscilloscope grid.
C OMPATIBILITY
The FlexRay TDP and TD options are available for WaveRunner Xi oscilloscopes. The FlexRay D option is
available with WaveRunner 6000, WavePro 7000 and WaveMaster 8000 oscilloscopes.
The FlexRay specification is published by the FlexRay Consortium. As of the date of the printing of this manual
the FlexRay protocol specification is currently at V2.1 Rev A, accompanying this specification is the V2.1 Rev A
Errata V1 document. Separate specifications exist for the physical layer and data link layer.
A SSUMPTIONS
This manual assumes a basic understanding of the FlexRay standard physical layer and protocol layer
specifications, and knowledge of how FlexRay is used. Also, a basic understanding of oscilloscope operation -
specifically the LeCroy oscilloscope which the FlexRay trigger, decode, and physical layer option is used with – is
assumed. Wherever practical or necessary, details on specific oscilloscope features have been included in this
manual.
Note: LeCroy has a policy of frequently updating software. It is possible that screen images in this manual may not exactly match what you
see on your oscilloscope display. However, functionality is nearly identical.