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25 - 27 February 2020 // Nuremberg, Germany

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Exhibitors & Products embedded world 2019


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TraceX is Express Logic’s host-based analysis tool that provides developers with a graphical view of real-time system events and enables them to visualize and better understand the behavior of their real-time systems. With TraceX, developers can see clearly the occurrence of system events like interrupts and context switches that occur out of view of standard debugging tools. The ability to identify and study these events, and to pinpoint the timing of their occurrence in the context of the overall system’s operation enables developers to resolve programming problems by finding unexpected behavior and letting them investigate specific areas further.

TraceX Free TrialTrace information is stored in a buffer on the target system, with the buffer location and size determined by the application at run-time. TraceX can process any buffer constructed in the proper manner, not only from ThreadX, but from any application or RTOS. The trace information may be uploaded to the host for analysis at any time – either post mortem or upon a breakpoint. ThreadX implements a circular buffer, which enables the most recent “N” events to be available for inspection in the event of system malfunction or other significant event.

Trace Data Collected By ThreadX® RTOS
TraceX is designed to work with Express Logic's ThreadX RTOS, which constructs a database of system and application “events” on the target system during run-time. These events include:

  • thread context switches
  • preemptions
  • suspensions
  • terminations
  • system interrupts
  • application-specific events
  • all ThreadX API calls

Events are logged under program control, with time-stamping and active thread identification so they can be displayed later in the proper time sequence, and associated with the appropriate thread. Event logging may be stopped and restarted by the application program dynamically, for example, when an area of interest is encountered. This avoids cluttering the database and using up target memory when the system is performing correctly.

TraceX is Like a Software Logic Analyzer
Once the event log has been uploaded from target memory to the host, TraceX displays the events graphically on a horizontal axis representing time, with the various application threads and system routines to which the events are related listed along the vertical axis. TraceX creates a “software logic analyzer” on the host, making system events plainly visible. Events are represented by color coded icons, located at the point of occurrence along the horizontal timeline, to the right of the relevant thread or system routine. When an event icon is selected, the corresponding information for that event is displayed, as well as the information for the two previous and two subsequent events. This provides quick, single-click access to the most immediate information about the event and its immediately surrounding events. TraceX provides a “Summary” display that shows all system events on a single horizontal line to simplify analysis of systems with many threads.


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