J-Trace PRO
Analyze, Verify, and Profile Your Code
- Real-time streaming trace at full System Clock
- Tune your application with live code profiling
- Satisfy regulatory requirements with instruction-level code coverage
- Isolate and identify hard-to-find code defects with unlimited trace
- Full J-Link debug functionality
J-Trace PRO: The Leading Trace Solution
J-Trace PRO is an advanced debug probe that supports Arm's advanced tracing features of Arm Cortex cores. It can capture complete instruction traces over long periods of time—thereby enabling the recording of infrequent, hard-to-reproduce bugs. This is particularly helpful when the program flow "runs off the rails" and stops in a fault state.
In combination with our toolchain independent debug software Ozone and the extensive example project library, including the most popular target devices, our J-Trace PRO user gets the best possible trace experience.
Features
J-Trace PRO offers an extensive featureset fulfilling any requirement a J-Trace PRO user might have. The most prominent features that make this trace probe the leading trace probe are as follows:
- Streaming Trace
- Unlimited Trace Buffer
- Trace support for Cortex-A/R/M target devices
- Live Code Coverage
- Live Code profiling
- Power Trace of target device's current consumption
- Cross Platform Support (Win/Mac/Linux)
- Supported in most popular IDEs
- Free stand alone debugger Ozone can be used with any tool chain to enable tracing
- Unlimited Flash Breakpoints
- Trace Reference Board included for quick and easy first steps
- Fanless design
Streaming Trace
One of J-Trace PRO's main features is the so called Streaming Trace. With this feature J-Trace PRO can process instruction trace data sent from the target device in real-time fashion using trace pins. That way the user knows exactly what the target device is and was doing at any point in time. This does not only enable a deep insight in any application running on the target device but offers also additional powerful debug strategies that can be applied.
Real Time Profiling
Real Time Profiling provides visibility as to which instructions have been executed and how often—so hotspots in an application can be addressed and optimization opportunities identified. These profiles can later be exported using e.g. Ozone debugger for documentation and analysis purposes.
Real Time Code Coverage
Real Time Code Coverage helps engineers have visibility over which parts of the application code have been executed.
Get Started Easily
J-Trace PRO has been designed to work out-of-the-box with most trace capable target devices. An extensive list with tested target devices gets updated regularly with the latest target device releases. In all other cases J-Trace PRO offers additional features that can make any trace setup possible. It has never been easier to get a trace setup up and running.
Please Note: The Trace Tutorial can be found here.
Trace Reference Boards
Every J-Trace PRO package comes with a Cortex-M Trace Reference Board included. Other Trace Reference Boards based on other target devices are also available. The Trace Reference Boards are perfect for quick and simple trace setups and can be used as reference for custom board designs.
Model Comparison
Hardware features like Ethernet interface, USB full- / high-speed interface, etc. are J-Trace model specific features which can not be updated or changed by software updates. For more information please visit our J-Trace PRO overview webpage.
| Feature | J-Trace PRO Cortex-M | J-Trace PRO Cortex |
|---|---|---|
| USB | 3.0 (SuperSpeed) | 3.0 (SuperSpeed) |
| 10/100/1000 Ethernet | ||
| JTAG interface | ||
| SWD interface | ||
| SWO interface | ||
| Unlimited Streaming Trace + Live Analysis | ||
| Cortex-M ETM Trace | ||
| Cortex-A ETM Trace | ||
| Cortex-A PTM Trace | ||
| Cortex-R ETM Trace | ||
| Streaming bandwidth USB | 1.2 Gbit/s | 1.2 Gbit/s |
| Streaming bandwidth Ethernet | 720 Mbit/s | 720 Mbit/s |
| Max. TPIU frequency | 300 MHz | 300 MHz |
| Max. trace clock frequency | 150 MHz | 150 MHz |
| Additional information | More | More |
Supported
Not Supported
J-Trace Model Overview
J-Trace PRO Cortex
J-Trace PRO Cortex-M
FAQ
What is the advantage of using the J-Trace PRO over other trace probes?
A: One of the biggest advantages the streaming trace capability. With streaming trace you get the ability to do continuous live trace analysis to be able to debug even the most complex problems. In addition to that, J-Trace PRO can be used with most Cortex-M devices out-of-the-box and does not require complex configuration.
What are the other differences to the older J-Trace for Cortex-M?
A: J-Trace PRO can now work with trace clocks of up to 150 MHz (300 MHz CPU clock). It is equipped with Gigabit Ethernet for streaming trace and remote debugging. The debug interface speed has doubled. J-Trace PRO includes more options for configuration and troubleshooting, made easily available through the integrated web server.
Can I use the J-Trace PRO as a debug probe?
A: Yes. The J-Trace PRO includes all capabilities of the J-Link debug probes and comes with all licenses, such as for unlimited flash breakpoints. It can be used with the J-Link Software and any tool that supports the J-Link.
Can the J-Trace PRO be used with any IDE?
A: Yes, the J-Trace PRO can be used with all common IDEs, just like any J-Link debug probe.
Can any IDE be used for tracing as well?
A: Unfortunately most IDE vendors do not offer trace analysis features or only to a limited degree.
What can I use for tracing and analysis?
A: We recommend using the graphical stand-alone debugger Ozone. It supports all capabilities of the J-Trace PRO and compliments them with advanced analysis features. Ozone can be used compiler independent, with output of any IDE or toolchain. Ozone can be used completely free of charge with a J-Trace PRO, even for commercial use.
What do I need to do to trace with a J-Trace PRO?
A: Usually just connect to your target device and start debugging. J-Trace PRO is designed to simply work. You can get up and running in less than 10 minutes.
Where can I find trace related troubleshooting information?
A: Tracing is a very hardware dependent debug technique and some target hardware modifications or designs can cause issues when trying to set up the trace debug interface. To give our customers a simple to use troubleshooting platform with the most asked questions answered we have created the following setup page: Setting up Trace
Should any other question arise you can contact us at: support@segger.com
Are there any trace example projects that I can use for orientation?
A: Yes, every J-Trace PRO gets shipped with a Cortex-M Trace Reference Board. An example project is part of the J-Trace tutorial.
We also created a list of tested devices that each come with an example project that runs out-of-the-box with a J-Trace PRO and Ozone. The list is available here and is being updated constantly.
My device is not on the tested devices list, what can i do to get an example project for it?
A: As the market with trace capable MCUs is growing it is becoming harder to keep track of all devices. Should it happen that we do not have a trace example for your particular device feel free to contact us at support@segger.com
Requirement for adding a new example project are:
- Must be supported by J-Link software: Overview of supported CPUs and Devices
- The target hardware must be publicly available and an evaluation board
- Trace pins must be physically connected to the trace debug interface