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CCS/TMS320F28377S: ILLEGAL_ISR due to DELAY_US

Eric ***
Prodigy 130 points
Part Number: TMS320F28377S


Tool/software: Code Composer Studio

When debugging a project using some of the code from ADC examples, I am tripping the ILLEGAL_ISR interrupt at DELAY_US(1000) in the ConfigureADC() function call.  I have already successfully run the ADC example as an imported project.

More Details: I am starting a new project with most of the example files copied locally to the project.  I can compile without any warnings.  I am using the linker file generated when launching a new project in CCS with the TMS320F28377S part in addition to the "F2837xS_Headers_nonBIOS.cmd" file.

Reading one other thread makes me think I need to correct the project settings or the linker command file.

Thanks for the help in advance!

  • 0
    Prodigy 130 points
    Figures. Within a minute of posting, the idea came to me. In the "F2837xS_SysCtrl.c" file there is a section that copies all ramfuncs from flash to ram that is compiled only if "_FLASH" is defined.

    Normally, where does one define this "_FLASH" macro?
  • 0
    TI__Guru 53995 points

    Hi Eric,

    I'm guessing the delay function (which is in ramfuncs) isn't being copied into RAM properly before it gets called. InitSysCtrl() should do this for you if you have _FLASH in your predefined symbols. Can you check your CCS project settings to make sure it's there?

    Edit: Oops, looks like you spotted it. But like I said, predefined symbols is usually the best place.


    Thanks,
    Whitney