FAQs for Debugger Hardware

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How can I use multiple USB devices with several TRACE32 instances?
Ref: 0289

More than one Lauterbach USB device can be used at the same time from the same host.
For each USB device, a TRACE32 instance needs to be started.

To use multiple USB devices with one PC or workstation, you need
  • for Windows: the current T32USB driver (see below)
  • current TRACE32 software (at least April 2007)
  • TRACE32 device firmware revision V8 or later (see below)
Please download the applicable packages here:

Is it possible to use both uTrace connectors, A and B to debug two targets?
Ref: 0481

Only connector A of the uTrace can be used together with a whisker cable for debugging.
Debugging two targets using two whisker cables is only possible with the CombiProbe. The standard configuration of the uTrace is with a MIPI20T whisker cable plugged to connector A. The extended configuration is to add a TRACE32 Analog Probe plugged to connector B via a Converter uTrace to PI-Analog Probe. The TRACE32 Analog Probe enables an energy profiling of your application.

Ist it possible to debug with two debug boxes and two debug cables two processors over one single JTAG connector?
Ref: 0461

Yes this is possible using a Y-Adapter. Please refer to "Configuration 3: Two (or more) PowerDebug Modules" in debugger_user.pdf. However, this setup is quite error prone and electrically sensitive. An approach with two licenses in one single debug cable is thus recommended.
Essential things to check:
  • All JTAG lines require proper pullup/down: TMS/TDI a pullup, TCK a pulldown, it is recommended to add also a slight pullup/down to TDO
  • The distance between the two debug calbes should be as short as possible (<20mm)
  • Both debug boxes must be connected to each other using the PodBus connector

The JTAG "bus" is used as shared resource using a TriState technique. This is why the JTAG lines must have proper pullup/pulldown.

Should I use one or two power supplies, USB/Ethernet cables when two Lauterbach debug modules are connected together via PodBus?
Ref: 0460

  • PowerDebug USB 2.0, PowerDebug Ethernet and PowerTrace/Ethernet have a PDBUS IN connector
  • PowerDebug USB 3, PowerDebug II and PowerDebug PRO have a PODBUS SYNC connector (instead of PODBUS IN)

Debug boxes connected via PODBUS SYNC synchronize their clocks and can trigger each other. However each box needs its own power supply and sepaerate USB cable or Ethernet connection to the PC. In t32start each debugger is configured as a separate PodBus Device Chain.
Debug boxes connected via PODBUS IN build one chained debug system, where the first box is the master. All boxes use the same clock, triggers, power. Only the first box should be connected to the PC. In t32start all debuggers are added to the same PodBus Device Chain.

Why do I get the error message "Plugged debug cable is not suitable for CPU"?
Ref: 0448

In general you get the error message "Plugged debug cable is not suitable for CPU", when the started TRACE32 application is not supported by the debug cable plugged to your PowerDebug.
E.g. The "PowerPC-4xx Debug Cable" is not suitable for "TRACE32 for ARM" (t32marm.exe)
Please start the correct TRACE32 application or connect the correct debug cable to your PowerDebug.

As a special case, you also get the error message "Plugged debug cable is not suitable for CPU" if you use TRACE32 R.2018.02 or older and you use a new debug cable that is not yet supported by that version:
  • If your ARM debug cable has a serial number starting with "C18" or higher, it is the new "ARM Debug Cable V5" (shipped since 2018). Please ensure you use TRACE32 version R.2017.02 or higher.
  • If you use the Automotive PRO cable (LA-2707), ensure you use TRACE32 R.2018.02 or higher.
You can download a suitable version of TRACE32 at https://www.lauterbach.com/7373

Why does my TRACE32 software version not work with PowerDebug PRO or PowerTrace PX?
Ref: 0427

If you get an error message like
"Fatal error: This software is too old to use this Lauterbach Hardware. Use more recent software!"
"FATAL ERROR from PODBUS-driver: TRACE32 USB device not connected".
Please check whether the used TRACE32 software fulfills the requirements below.

PowerDebug PRO is the successor of PowerDebug-II.
This kind of new hardware module requires at least TRACE32 software revision 58927 from 11/2014.

PowerTrace PX is the successor of PowerTrace.
This kind of new hardware module requires at least TRACE32 software revision 59808 from 11/2014.

The TRACE32 USB driver must be updated too.

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Last generated/modified: 05-Dec-2019