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Enquire for Connection with JTAC(Trace 32 debugger)

Alex Cruise
Intellectual 450 points

Hi, This is LG electronics engineer. 

Testing JTAG(trace32 debugger) connection in J721EXCP01EVM Board.

As soon as trace 32 debugger is connected with J721EXCP01EVM Board,

we test JTAG connection using the command "diag 16001" in trace 32 debugger window(PC).

However, from the first step, it is not operated normally.

And then, Is there any previous step before the connection with Trace 32 debugger ?

I can't understand that there is some problem from the HW connection.

  • 0
    TI__Mastermind 23695 points

    Hello,

    Current TRACE32 builds fully support the J721EXCP01EVM board. The full support package will be under NDA until that part is released to the broad market. If you have an up to date TRACE32 license Lauterbach can provide you the necessary support files. Additionally, inside of TI we do have scripts and other collateral which can be shared over secure portals which your TI local representative can give you access to.

    The J721EXCP01EVM has a MIPI60 debug header and the kit had cTI20 or TI14 adaptors. On my EVM, I typically use an LA-3818 (ARM20 to MIPI64) adaptor to connect to my debug box as I use both JTAG debug and trace.  If you only need debug then using something like the LA-3780 and one of the TI adaptors will work. 

    As a very basic test you can do a system.detect.<jtagclock, daisychain, ...> and you should see that the basic connectivity to the TAP controller is there.  To fully get into the ARM and DSP cores you will need the current support build of TRACE32 and some scripts with the appropriate core identifiers.

    Regards,

    Richard W.

  • 0 in reply to Richard Woodruff
    TI__Mastermind 23695 points

    Hello LGE Engineer,

    Were you able to resolve your connection issue? I did see some internal traffic where your group was OKed to get the necessary collaterals. Also, it appears that you all may have needed to update a legacy adaptor.

    To expand: The recommended trace adaptor is the LA-3818 as it supports (as delivered) all the trace lanes which the board routes 22 of 24. An older OMAP4 style adaptor like an LA-3812 only supports up to 18 bits. To use the older adaptor on DRA7xx or DRA8xx a modification is needed to tieing resets together (see attached picture). For non-trace, the adaptors with the EVM kit along with a legacy cTI20 or TI14 connector will work.

    Legacy Modification:

    Regards,

    Richard W.