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Trouble connecting target using TM4C123GXL with TM4C123GH6PM

TURJASU PYNE1
Expert 1310 points
Other Parts Discussed in Thread: EK-TM4C123GXL

Dear all,

I was trying to download a pre tested released code to my target using the LP, but the error comes "Error connecting target". I have studied several strings in e2e on this and have understood that this is NOT a Jtag lock case as I can download the same code to the LP Target MCU.  I have checked everything, changed several MCUs, but the problem remains. Also there is no error in the mcu surrounding circuits bevause other systems on this same design is running fine.

Please let me lnow

  • 0
    Guru 47900 points
    Feel your pain - and as you note - such happens with great repetitiveness here...

    Have you a 2nd Target board - so that the problem may be attributed to the JTAG source (your LPad) "or" to the "target board?"
    The description of your "target" is bit blurry - it always proves useful to eliminate, "Single board anomaly" from the, "Failed Connect Mix!"
  • 0
    TI__Guru**** 244400 points
    Hello Turjasu

    Can you please check the following JTAG application note on connecting EK-TM4C123GXL as a debug probe.

    www.ti.com/.../spma075.pdf
  • 0 in reply to Amit Ashara
    Expert 1310 points
    Thanks for sharing the pdf document. I changed the tiva and the target was programmed succesfully. I would like to ask you that where can i find the details about how to do a "risk free" soldering of tiva mcu on our application boards? Possibly I understand that these failures may be due to damage while soldering (as we still use soldering irons and NOT only Hot air stations)or ESD issue. Although we take proper ESD protection, but i think it is our process of soldering that damages the mcu.
    Please advise
  • 0 in reply to TURJASU PYNE1
    TI__Guru**** 244400 points
    Hello Turjasu

    I also use soldering iron to solder down a 128 QFP package TM4C129x device. There are multiple You Tube videos which show different soldering techniques. personally, I use a lot of flux and some tricks I learnt along the way like using reflow with flux and little solder.
  • 0 in reply to TURJASU PYNE1
    TI__Guru**** 244400 points
    Hello Turjasu,

    May be I should do a simple video to show the same can be done.... Would help a lot of folks to avoid expensive assembly costs for a limited set of boards...
  • 0 in reply to Amit Ashara
    Expert 1310 points
    Dear sir,

    Yes that will be of intense help to all of us who are working on the Tiva LQFP platform form factors. Also not all of us have the ability to purchase costly reflow ovens or go for high end wave soldering. But personally I feel that this is a topic which requires personal experience over time and with video from an experienced person like you will be of great help.

    Thanks