TMS320F28384D: Watchdog, we need to disable the watchdog when running debug probe

Dorion Carr

Part Number: TMS320F28384D

Is there a way to determine if there is a JTAG or Debug probe attached to the board at runtime?

our problem is that we enabled watchdog on all 3 cores CM/CPU1/CPU2 and the watchdog keeps firing when we hit a breakpoint.

I would like to either be able to check a registers in all 3 cores to determine to enable the watchdog or not.

What is the best way to do this? Free run mode (No JTAG) works fine.

over 3 years ago

0 Vivek Singh over 3 years ago

TI__Guru** 109165 points

Hi Dorion,

Watchdog counter should halt when CPU execution is halted on hitting the breakpoint so that should not cause an issue.

Coming to your question -

Is there a way to determine if there is a JTAG or Debug probe attached to the board at runtime?

We have TRSTn status (TRSTn_pin_status) in RESC register on CPU1 which can be used (value '1') to check if JTAG is active.

Regards,

Vivek Singh

0 Dorion Carr over 3 years ago in reply to Vivek Singh

Prodigy 160 points

Thanks for the information

Is there a way on CM to check?

I will assume that the same registers on CPU2 can also be used?

Dorion

0 Vivek Singh over 3 years ago in reply to Dorion Carr

TI__Guru** 109165 points

We have same register on CPU2 and CM but on CM, we don't have TRSTn status. You should be able to convey this info to CM from CPU1 via IPC while booting the CM.

Were you able to find if issue is due to watchdog only because it should not fire when CPU is halted ?

Regards,

Vivek Singh

0 Dorion Carr over 3 years ago in reply to Vivek Singh

Prodigy 160 points

I am all set thanks for the help, you have answered my questions.

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TMS320F28384D: Watchdog, we need to disable the watchdog when running debug probe