NURNBERG, Germany Agilent Technologies Inc. and Dependable Computer Systems GmbH (DECOMSYS) introduced at Embedded World a measurement system that provides FlexRay triggering and protocol decode measurements.
The system allows automotive designers who use embedded microprocessors to verify proper signal integrity of their FlexRay signals and proper timing of the time-triggered communication bus.
It combines an Agilent (Santa Clara, CA) 6000 series mixed signal oscilloscope (MSO) with a DECOMSYS (Vienna, Austria) BUSDOCTOR 2 protocol analyzer to provide for the first time-correlated slot/segment boundary display of the global FlexRay timing schedule on an oscilloscope.
The combination provides a set of FlexRay frame, slot and error triggering, including the ability to trigger on specific FlexRay communications qualified on base-cycle and cycle-repetition.
Designers can see a synchronous and time-correlated display of segment and slot-timing boundaries by importing a FIBEX file that defines the global FlexRay schedule directly into the 6000 series scope. This capability allows the system to be used as a standalone tester that does not require an external PC.
The DECOMSYS::BUSDOCTOR 2 and MSO can also be configured for synchronous operation using DECOMSYSÕ VISION software package. This type of system configuration provides higher-level FlexRay protocol analysis measurements on the PC and time-correlated FlexRay measurements on the oscilloscopes display.
The joint effort came as a result of a two-day brainstorming session in Austria around a year ago according to Johnnie Hancock, a program manager with Agilent in Colorado Springs. The companies collaborated on market research centered mainly on Germany and Japan with companies including Audi, BMW, Bosch, Denso, Renesas and Siemens VDO.
According to Hancock, designers came up with a number of requirements including the need verify timing of FlexRay timing schedule and the signal integrity of differential FlexRay signals. Speedy identification of errors was naturally important as was the need to correlate to ECU digital control and analog signals.
Not surprisingly automotive designers also wanted to test at extreme environment conditions but also wanted to synchronize on specific communication cycles. A non-Windows/portable scope was identified as important for in-car testing.