Tracing on ST STM32H743

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This article describes how to get started with trace on the ST STM32H743 MCU. This article assumes that there is already a basic knowledge about trace in general (what is trace, what different implementations of trace are there, etc.). If this is not the case, we recommend to read Trace chapter in the J-Link User Manual (UM08001). The ST STM32H743 MCU implements tracing via pins , so a J-Trace can be used for tracing.

Minimum requirements

In order to use trace on the ST STM32H743 MCU devices, the following minimum requirements have to be met:

  • J-Link software version V6.22f or later
  • Ozone V2.54b or later (if streaming trace and / or the sample project from below shall be used)
  • J-Trace PRO for Cortex-M HW version V1.0 or later
  • Tracepin connection like on the STM32H743I-EVAL board (See Specifics/Limitations for more information)

Sample project

Streaming trace

The following sample project is designed to be used with J-Trace PRO and Ozone to demonstrate streaming trace. The project has been tested with the minimum requirements mentioned above and a ST STM32H743I-EVAL board. The sample project comes with a pre-configured project file for Ozone that runs out-of-the box. In order to rebuild the sample project, SEGGER Embedded Studio can be used.

The maximum supported trace clock speed on the tested evalboard is 133 MHz due to hardware limitations (see ST manual for more information).

The following is a barebone example without PLL and peripheral init that should run on any related STM32H7 hardware: ST_STM32H7_32MHz_TraceExampel.zip

Note: The example is shipped with a compiled .JLinkScriptfile, should you need the original source it can be requested at support@segger.com

Specifics/Limitations

The STM32F7xx Productfamily has additional pins that can be used for tracing. Usually only 5 Pins are mapped to have the trace functionality. In this case however multiple pinout configurations are possible over different ports even. Should you be using our trace example make sure your physical tracepin connections are equal to the ones on the ST STM32H743I-EVAL board. If not adjust the pin initialization accordingly.

Tested Hardware

ST STM32H743I-EVAL