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TM4C1294 Connected LaunchPad,the CCS6.0 shows cannot connect

wei liu62
Intellectual 395 points

when I debug project my TM4C1294 Connected LaunchPad,the CCS6.0 shows "Error connecting to the target".when I connect it to PC,the LaunchPad can be identified by PC,and all drives is normal ,but when debug program it shows above massage.It happens as this,last time I wanted to download program with the launchpad,I connected it with annother board I forgot to disconnect the power supply of the board,then I connect the launchpad and the launchpad connected PC,and the JP3 connected ,then the CCS showed "Error connecting to the target".since then,everytime useit , it always show error.I tryed to unlock the chip, but it is useless.AND BY THE WAY,THETM4C123 become alittle hot.what should I do to solve it???

  • 0
    TI__Guru 59540 points
    Hello Wei,

    It sounds like you have, most likely, damaged the ICDI interface of the board or, perhaps, even some other part of it. When power the board do you see an of the LEDs on? Do you see any activity on the primary microcontroller? (May need to monitor some output pins that you were using with the image that is presently flashed into the device.)
  • 0 in reply to Chuck Davenport
    Intellectual 395 points

    I can see the LED on,which shows the power,anyother LEDs are not on.But if the ICDI interface  is damaged,what should I do to fix it?If I change the device what about the firmware in the TM4C123?I don't have it

  • 0 in reply to wei liu62
    TI__Guru 59540 points

    Hello Wei,

    It is difficult for me to tell what might be defective. You stated the TM4C123 heated significantly so it could also be the TM4C123 that is damaged or some other component on the board. If it is possible to obtain/borrow another TM4C123 Launchpad and try to connect with it.  I would recommend this just to make sure there is no issue with your setup and to confirm if the issue is specific to the launchpad you are seeing trouble with.

    If you cannot find another TM4C123 to borrow, I would recommend to buy a new one since the cost of replacing various components would add up and, with the potential of other issues replacing components, it is probably best not to attempt repair without a backup to use in the meantime.

  • 0 in reply to wei liu62
    TI__Guru**** 244400 points
    Hello Wei

    Does the Board show up in the device manager of the PC as Stellaris ICDI?

    Regards
    Amit
  • 0 in reply to Amit Ashara
    Intellectual 395 points

    hi,I can find the  Stellaris ICDI in the device manager of the PC,but if the Stellaris ICDI is damaged why it can show up in PC,I cannot understand,maybe anyother part of the device is damaged?

  • 0 in reply to Chuck Davenport
    Intellectual 395 points
    I can use annother Launchpad to connect the TM4C1294 ,but my TM4C123 cannot connect another.I think the TM4C123 may be damaged.Could I change another TM4C123 to my Launch pad where can I find the firmware of the ICDI interface.Is it in the offical web?Or find it by other ways?