• State Resolved
  • Locked Locked
  • Replies 7 replies
  • Subscribers 82 subscribers
  • Views 400 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

TMS320F28069: TMDSCNCD28069ISO cannot connect through JTAG

TMS320F28069: TMDSCNCD28069ISO cannot connect through JTAG

Howard Zou
Genius 12365 points
Part Number: TMS320F28069

Hi,

I met exactly the same problem as in the related thread.

And I find the problem happens when I power the board through the docking JP2. 

If I power the controlcard through J200 port, the problem is gone and the JTAG could be connected.

In both cases I connect J1 on the controlcard for JTAG connection.

And in both cases, LD1 and LD4 are on.

Why can't I power the board through docking JP2?

  • 0
    TI__Guru* 75800 points

    Howard,

    This is odd as you mention, if you could post the link to the other thread I'd like to take a look at that as well.

    LD4 indicates that the ISO JTAG has power(5V to 3.3V from the mini connector on the control CARD J1).  

    LD1 indicates that the board is getting 5V to power the MCU itself.  That it is on in either case, should mean that the MCU is powered and we should be able to connect either way.

    I believe that the J200 connection is allowing the 5V to power the board through diode D200, normally this input is to be used a a sense for the USB comms, vs power.  I'm not sure this was intended to power the board, buy I can see how this is working.

    In terms of the power from J2 on the docking station can  you confirm that LD1 on the dock is also lit?  This should change if you flip SW1.  You could also try a 5V DC barrel vs the USB to see if this changes anything.

    Also for debug can we make sure J200 is not connected during the above, I want to make sure we aren't having some contention issue between the 2 5V USBs when trying to power the board.

    Also please make sure the J8 on the dock is not shorted.

    Best,
    Matthew

  • 0 in reply to MatthewPate
    TI__Genius 12365 points

    Matt,

    sorry I thought you could see the related post. This is the link:

  • 0 in reply to Howard Zou
    TI__Guru* 75800 points

    Howard,

    Thanks for the link. In this case, if the power is coming from the USB connector on the docking station(not the 5V barrel), there will be 2 XDS100 emulators connected to the PC.  There is one on the baseboard and one on the control CARD itself(the J1 USB).  In this case the customer would need to ensure that the correct emulator is being accessed from CCS, as I think that the control CARD XDS100 may be blocked by default on the ISO card.

    I think the simplest way to verify this is to  power the dock with a 5V barrel connector vs the USB if possible.

    Best,

    Matthew

  • 0 in reply to MatthewPate
    TI__Genius 12365 points

    Matt,

    thanks.

    I've confirmed that your comment is true.

    I've got another question, is it possible that I configure in CCS to let CCS know which emulator is the correct emulator? How to do it?

  • 0 in reply to Howard Zou
    TI__Guru* 75800 points

    Howard,

    You can run XDS100serial.exe located here C:\ti\ccs_base\common\uscif\, to determine the serial number of each emulator.  I think inside of CCS you should be able to match this with the correct XDS100 to make sure the correct one is being used to connect.

    Best,

    Matthew

  • 0 in reply to MatthewPate
    TI__Genius 12365 points

    Matt,

    I double clicked XDS100serial.exe, and a command window pop up and soon closed. I can see nothing.

  • 0 in reply to Howard Zou
    TI__Guru* 75800 points

    Howard,

    I should have been more clear on my directions.  You'll need to open up a command window(DOS) in windows and execute this from that directory so that you can see the output of the executable.

    Best,

    Matthew