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Undef entry on RM42

Pablo Cottens
Genius 3020 points
Other Parts Discussed in Thread: HALCOGEN, RM42L432, CCSTUDIO

Hello,

I'm using the Hercules launchpad with RM42 and whenever I'm using the RTi interruption an undefined entry exception occurs (I created the project entirely in HALcogen). I was able to track the exception to a FMXR instruction, which is being executed:

          rtiCompare0Interrupt:
0000679c:   E92D500F STMFD           R13!, {R0, R1, R2, R3, R12, R14}
000067a0:   EEF8CA10 FMXR            R12, FPEXC
000067a4:   E92D1000 STMFD           R13!, {R12}

I looked through the documentation and found that this processor doesn't have a VFP in it. Is there any way to do a workaround for this? I'm using CCS5.5, and, preferably I'd like to keep the current CCS version.

  • 0
    TI__Mastermind 22375 points

    Pablo,

    When you created your project in CCS, did you select the correct part number?
    If the correct part is selected, the compiler properties should be set with VFP disable so the Code Generator does not use VFP instruction.

    You can check by opening the project properties and look under:
    Build->ARM Compiler->Processor Options: Specify floating point option should be  blank.

    Please let me know.

  • 0 in reply to Jean-Marc Mifsud
    TI__Guru 68820 points

    Or 'vfplib' - which means software floating point libs not using the VFP instructions.

    I think the newer compilers have gone to 'vfplib' and there is no option to be 'blank' so it will depend on what is installed along w. your 5.5.

     

  • 0 in reply to Jean-Marc Mifsud
    Genius 3020 points

    Yes, I selected the correct part (RM42L432), but I can see that the specify floating point option is NOT blank.

    I did the following:

    - In Project Properties->CCS General:Runtime support library option I selected <automatic>

    - In Project Properties->CCS Build->ARM Compiler->Processor options:Specify floating point option I put it blank

    After that it worked.

    Is what I did ok? Is there a better way to fix this?

  • 0 in reply to Pablo Cottens
    TI__Guru 68820 points

    Yes but if you update to a very new compiler (like 5.1.x) you may need to flip blank to 'vfplib'. 
    But if it lets you leave it 'blank' then this is ok for the compiler you are using.

    BTW which compiler version do you have?

  • 0 in reply to Anthony F. Seely
    Genius 3020 points

    Compiler version 5.1.1

  • 0 in reply to Pablo Cottens
    TI__Guru 68820 points

    Hi Pablo,   if you get a minute sometime maybe try adding the -clean option to your CCSTUDIO icon and launching it;  to clean up the cached information.  You can take this out after you do it once - curious to see if it refreshes the options that show up in your drop-down for the VFP selection.

    Info on how to do this http://processors.wiki.ti.com/index.php/Troubleshooting_CCSv5

    2. Use the -clean argument when calling ccstudio.exe: CCS is launched by running the '.\ccsv5\eclipse\ccstudio.exe' executable. This is what is called when using the CCS desktop shortcut. However, ccstudio.exe can be called with some command line arguments. One of them is '-clean'. When calling 'ccstudio.exe' with '-clean', it will clean out cached data by the IDE and plug-ins upon launching CCS. Sometimes this cached data can get corrupted over time and cleaning it out can fix many problems. Note that launching CCS with '-clean' will cause the launch time to be slower so it is not recommend to use it every time but only when needed. To add the '-clean' option simply right-click on the CCS desktop shortcut and at the end of the "Target" field, enter '-clean'