STM32H7

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This article covers device specifics for the ST STM32H7-family.

SWO

On the STM32H7 series devices from ST SWO is supported. However, a few device specifics apply which are described in the following section.

SWO register access

For most Cortex-M devices, the SWO registers are accessible by the AHB-AP. This is not the case for the STM32H7 series devices. In this case the registers need to be partially accessed by the APB-AP.

Note: J-Link handles the current setting of this registers automatically. J-Link software version V6.33a or later is required.

If you are using software that handles SWO init without J-Link software (e.g. EWARM) then we suggest contacting the software manufacturer for more details which settings need to be applied.

Note: The settings are applied by a compiled .JLinkScript-file located in the J-Link software installation folder under /Devices, should you need the original source, please get in touch with SEGGER directly via our support system: https://www.segger.com/ticket/.

Sample projects

Sample projects that demonstrate SWO usage are available for the following eval boards:

STM32H753xx/50xx/45xx/43xx QSPI support

The ST STM32F753xx/50xx/45xx/43xx device series comes with a QUADSPI controller which allows memory mapped read accesses to any (Q)SPI flash, connected to the Quad-SPI interface of the MCU. This allows the J-Link DLL to support flash programming through the Quad-SPI interface. Unfortunately, there is no generic way how to implement flash programming because the pins used to connect the SPI flash are not defined. Different pins can be used for the same QUADSPI alternate function and therefore, for each configuration, a slightly different RAMCode (different pin initialization / flash size) is required. We have developed a flash algorithm based on the ST STM32H753-EVAL and STM32H745-Discoevaluation board. This flash algorithm can be used to to program any common (Q)SPI flash, connected to the Quad-SPI interface of the ST STM32H753xx/50xx/45xx/43xx device. The flash algorithm is based on the SEGGER Open Flashloader concept so it can easily be exchanged if a pin configuration, different from the one used in the example flash algorithm, is required. In such cases, please get in touch with SEGGER directly via our support system: https://www.segger.com/ticket/.

For further information regarding this as well as the flash algorithms, please refer to the following pages:

RTT

SEGGER's RTT can be used with a J-Link connected to a STM32H7 target device.

Sample project

For a sample Embedded Studio project, refer to the following .zip archive:

ST_STM32H743ZI_NUCLEO_RTT.zip

Note: The above project was tested with the following setup:

Target device STM32H743ZI
Evalboard NUCLEO-H743ZI2 (ST)
J-Link software version V6.51b
Embedded Studio version V4.18

Tested Hardware

NUCLEO-H743ZI2

Tracing on STM32H7 series

This section describes how to get started with trace on the ST STM32H7 MCUs. This section 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).

Note:

  • The sample projects come with a pre-configured project file for Ozone that runs out-of-the box.
  • The following sample project is designed to be used with J-Trace PRO for streaming trace, J-Link Plus for buffer tracing (TMC/ETB trace) and Ozone to demonstrate streaming trace.
  • In order to rebuild the sample project, SEGGER Embedded Studio can be used.
  • All examples are shipped with a compiled .JLinkScriptfile (.pex), should you need the original source, please get in touch with SEGGER directly via our support system: https://www.segger.com/ticket/.

Tracing on ST STM32H743 (SEGGER STM32H7 Trace Reference Board)

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 V6.60d or later
  • Ozone V3.10b 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 for streaming trace
  • J-Link Plus V10 or later for TMC/ETB trace

Streaming trace

The project has been tested with the minimum requirements mentioned above and a SEGGER STM32H7 Trace Reference Board which can be purchased on the SEGGER Website.

Example project: ST_STM32H7_Trace_Tutorial_Project.zip

Trace buffer (TMC/ETB)

Example Project: ST_STM32H7_TraceBuffer_Tutorial_Project.zip

Tested Hardware

SEGGER STM32H7 Trace Reference Board

Reference trace signal quality

The following pictures show oscilloscope measurements of trace signals output by the "Tested Hardware" using the example project. All measurements have been performed using a Agilent InfiniiVision DSO7034B 350 MHz 2GSa/s oscilloscope and 1156A 1.5 GHz Active Probes. If your trace signals look similar on your trace hardware, chances are good that tracing will work out-of-the-box using the example project. More information about correct trace timing can be found at the following website.

Trace clock signal quality

The trace clock signal quality shows multiple trace clock cycles on the tested hardware as reference.

Trace clock signal quality

Rise time

The rise time of a signal shows the time needed for a signal to rise from logical 0 to logical 1. For this the values at 10% and 90% of the expected voltage level get used as markers. The following picture shows such a measurement for the trace clock signal.

TCLK rise time

Setup time

The setup time shows the relative setup time between a trace data signal and trace clock. The measurement markers are set at 50% of the expected voltage level respectively. The following picture shows such a measurement for the trace data signal 0 relative to the trace clock signal.

TD0 setup time

Tracing on ST STM32H743

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 V6.60d or later
  • Ozone V3.10b 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 for streaming trace
  • J-Link Plus V10 or later for TMC/ETB trace
  • Tracepin connection like on the STM32H743I-EVAL board (See Specifics/Limitations for more information)

Streaming trace

The project has been tested with the minimum requirements mentioned above and a ST STM32H743I-EVAL board.

Example Project: ST_STM32H743_400MHz_Trace.zip

Note:

  • 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
  • The following example project sets the CPU core clock to 400 MHz and sets the trace clock to 400/6 MHz. This is due to the hardware limitations of the ST EVAL board which officially supports only up to 50 MHz. More information can be found in the ST EVAL board user manual.

Trace buffer (TMC/ETB)

Example Project (32MHz): ST_STM32H7_32MHz_TraceBufferExampl_pex.zip

Example Project (400MHz): ST_STM32H743_400MHz_TraceBuffer.zip

Specifics/Limitations

The STM32H7xx 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 trace-pin connections are equal to the ones on the ST STM32H743I-EVAL board. If not adjust the pin initialization accordingly.

The eval board used in the example projects has an official trace clock limit of 50 MHz due to hardware restriction on the eval board. However the 50 MHz Traceclock should suffice for most target applications. Should nonetheless faster trace speeds be needed multiple resistors and solder bridges need to be removed from the eval board. More information about this can be found in the eval board user manual.

Tested Hardware

ST STM32H743I-EVAL

Reference trace signal quality

The following pictures show oscilloscope measurements of trace signals output by the "Tested Hardware" using the example project. All measurements have been performed using a Agilent InfiniiVision DSO7034B 350 MHz 2GSa/s oscilloscope and 1156A 1.5 GHz Active Probes. If your trace signals look similar on your trace hardware, chances are good that tracing will work out-of-the-box using the example project. More information about correct trace timing can be found at the following website.

Rise time

The rise time of a signal shows the time needed for a signal to rise from logical 0 to logical 1. For this the values at 10% and 90% of the expected voltage level get used as markers. The following picture shows such a measurement for the trace clock signal.

TCLK rise time

Setup time

The setup time shows the relative setup time between a trace data signal and trace clock. The measurement markers are set at 50% of the expected voltage level respectively. The following picture shows such a measurement for the trace data signal 0 relative to the trace clock signal.

TD0 setup time

Tracing on ST STM32H753

The STM32H753 MCU is in regards of tracing comparable to the STM32H743 so the following example projects can be used as reference: Tracing on ST STM32H743

Note: Make sure to set the correct device in your Ozone project.

Tracing on ST STM32H747 (dual-core)

The STM32H747 is different to the MCUs listed above. It is a dual-core device with a Cortex-M7 and a Cortex-M4. The following projects have been tested with the minimum requirements mentioned and a ST STM32H747I-EVAL evaluation board.

NOTE: For now, J-Trace Pro does not support tracing both cores in parallel. Therefore, a different script/project is provided here, depending on which core is supposed to be traced.

Minimum requirements

In order to use trace on the ST STM32H747 MCU devices, the following minimum requirements have to be met:

  • J-Link software version V6.72b or later
  • Ozone V3.10f 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 for streaming trace
  • J-Link Plus V10 or later for TMC/ETB trace

Streaming trace

STM32H747_M7

Example project: ST_STM32H747_M7_TracePinsSample.zip

STM32H747_M4

Example project: ST_STM32H747_M4_TracePinsSample.zip

Trace buffer (TMC/ETB)

STM32H747_M7

Example Project: ST_STM32H747_M7_TraceBufferSample.zip

STM32H747_M4

Example Project: ST_STM32H747_M4_TraceBufferSample.zip

Tested Hardware

For the test, the ST STM32H747I-EVAL evaluation board was used.

Reference trace signal quality

The following pictures show oscilloscope measurements of trace signals output by the "Tested Hardware" using the example project. All measurements have been performed using a Agilent InfiniiVision DSO7034B 350 MHz 2GSa/s oscilloscope and 1156A 1.5 GHz Active Probes. If your trace signals look similar on your trace hardware, chances are good that tracing will work out-of-the-box using the example project. More information about correct trace timing can be found at the following website.

Rise time

The rise time of a signal shows the time needed for a signal to rise from logical 0 to logical 1. For this the values at 10% and 90% of the expected voltage level get used as markers. The following picture shows such a measurement for the trace clock signal.

TCLK rise time

Setup time

The setup time shows the relative setup time between a trace data signal and trace clock. The measurement markers are set at 50% of the expected voltage level respectively. The following picture shows such a measurement for the trace data signal 0 relative to the trace clock signal.

TD0 setup time