Can not use the Embedded Trace Buffer (ETB) on a TIVA TM4C1294NCPDT with a xds100v2 JTAG

Christopher Hossack

Other Parts Discussed in Thread: TM4C1294NCPDT

Hi,

I'm trying to track down a Sys/Bios stack corruption (see TIVA SYS/BIOS FPU context switch corruption with zero latency interrupts) and I thought I would use the cortex M4 ETB hardware. According to the TI website I can use the ETB with a XDS100v2 JTAG. But after connecting to my target it doesn't seem to be possible.

I'm using CCS6.1.0.00104

My steps are

Press debug and wait for my code to be downloaded to the eval board.
Click Tools, Hardware Trace Analysis, Interrupt Profiling
Try and change the Transport Type. Only SWO Trace available when I think I need to use ETB

I just want to capture the trace of my software once it's hit my break point.

cheers

Chris

over 9 years ago

0 Amit Ashara over 9 years ago

TI__Guru**** 244400 points

Hello Chris,

CCS does not support Embedded Trace for Cortex M4 cores.

Regards
Amit

0 Christopher Hossack over 9 years ago in reply to Amit Ashara

Intellectual 670 points

hi,
Is there any plan to support this as some point?
cheers
Chris

0 Amit Ashara over 9 years ago in reply to Christopher Hossack

TI__Guru**** 244400 points

Hello Chris,

None that I know of. But Code Composer Studio Forum should be able to tell if there is something being planned.

Regards
Amit

0 Chester Gillon over 9 years ago in reply to Amit Ashara

Guru 92251 points

Amit Ashara said:
CCS does not support Embedded Trace for Cortex M4 cores.

Do any of the TI Cortex-M4 devices include an Embedded Trace Buffer?

There is no mention of an ETB in the TM4C1294NCPDT datasheet.

[I have seen Cortex-M4 devices from other manufacturers which include an ETB]

0 cb1_mobile over 9 years ago in reply to Chester Gillon

Guru 117855 points

Chester Gillon said:
[I have seen Cortex-M4 devices from other manufacturers which include an ETB]

Good that - and those (properly) investigating have (long) noted the same. Absence of even (common) SWD, signals that, "best/brightest/most current" may not play here.

Mating the (proper) tool to task should be a fundamental - and the (dual) limitations forced upon users by:

sub-performing, single vendor (only) IDE
MCUs - which do not fully/properly accommodate "vital and/or highly desired" functions/capabilities

Poster may wish to survey & then (better) consider his, "weapon of choice."

And sometimes - the methods, implementations, & examples of (others) may be adapted to your "less than stellar" device & lash-up. At the minimum - (some) investigation proves worthwhile...

0 Amit Ashara over 9 years ago in reply to Chester Gillon

TI__Guru**** 244400 points

Hello Chester,

At least in the TM4C12x device family, there is no ETB. There is only an ETM.

Regards
Amit

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Can not use the Embedded Trace Buffer (ETB) on a TIVA TM4C1294NCPDT with a xds100v2 JTAG