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XDS100V2 Programmer

alan alban
Intellectual 575 points

I am trying to program My F28026 chip. I was trying to program the flash memory before but I failed so i got a new chip. I don't seem to be getting a good connection on my chip however, or I don't know what's happening but I can program my device successfully, however when I try to run the debugger again it fails to connect and I have to reset the device. I asked this question before but did not get a concrete solution. I also cannot use the memory viewer. I can't see any of the memory addresses. Any help with this? 

  • 0
    Guru 192875 points

    Alan, I somewhat feel this issue is related to CSM. Not able to view memory addresses is one of its side effect. I would like you to list out all the things you've already tried, so that we can eliminate all those possibilities.

    Regards,

    Gautam

  • 0 in reply to Gautam Iyer
    Intellectual 575 points

    what is CSM? how do i fix that?  I checked all the JTAG connections. I checked my files are all included, and they are. I enabled the XCLKOUT and I get the clock speed I want. I blinked LEDs and turned on SPI to beep a speaker and that worked. SCI however does not work even with the same code as in my C2000 launchpad. Besides hardware and include files I don't know what else to check.

  • 0 in reply to Gautam Iyer
    Guru 13185 points

    Hello Alan,

    Actually what is your kit for F28026?

    Is it from TI or custom board?


    Best regards,

    Maria

  • 0 in reply to Maria Todorova
    Intellectual 575 points

    Well I bought a breakoutboard for my F28026, I have the QFP package. I put it on a breadboard. I followed the C2000 Lunchpad schematic and the device datasheet to know the values and position of R/C components. I made All the connections for my JTAG programmer. I can program the chip. But I can't "reprogram" it. Meaning if i leave debug mode and try to go back it'll give me a connection error, which to my knowledge can only be fixed by powering my chip down and powering it back up.

  • 0 in reply to alan alban
    Guru 192875 points

    Oh! You should've mentioned this earlier. Anyways, can you please attach the screenshot of the error window?

    Also, I hope the component values and the connections required for JTAG are correct.

    Regards,

    Gautam

  • 0 in reply to alan alban
    Guru 13185 points

    Hello Alan,

    If you are sure all of your hardware connection is correct, can you check what is the level of your TRSTn pin?

    Did you pull down this TRSTn pin?

    Do you use isolation chip (ISO) for your JTAG connection (like the one in launchpad)?

    Also, did you ever success programming to RAM and debug it well without error?

    Best regards,

    Maria

  • 0 in reply to Maria Todorova
    Guru 13185 points

    Hello Alan,

    In another thread you said that you can see your code running in your chip but you can not enter the debugger.

    Gautam has suggested you to check the Test Connection, I hope you can share us the result.

    Also please check your TRSTn pin level (whether it is high or low).

    The reason for this is below:

    You can enter the debugger (EMU) IF ONLY the TRSTn pin is high (1).

    So that's why I want you to check this pin level to eliminate this possibility. Please share your finding so we can help you more.

    Best regards,

    Maria