TMS320F280039C: isnan() is causing illegal operation

Derek Cook

Hello,

I'm trying to check if a number is NaN using the function isnan in math.h but when it runs it ends up in the Interrupt_illegalOperationHandler(). I've tried using all three of these individually as well in _defs.h

I simplified a function just to test isnan and now this is the function ending up in the illegalOperationHandler()

If I comment out isnan the function works fine. I have math.h included in the file. Do you have any ideas what is going on here?

over 3 years ago

0 Derek Cook over 3 years ago

Intellectual 890 points

If I don't put it in the if statement it still ends up in the illegal operation handler

0 Santosh Jha over 3 years ago in reply to Derek Cook

TI__Guru 50611 points

Derek,

I am looking into this. I will get back to you by tomorrow.

Thanks & Regards,

Santosh

0 Santosh Jha over 3 years ago in reply to Santosh Jha

TI__Guru 50611 points

Derek,

Do you have any sample project which I can use to recreate the issue?

Thanks & Regards,

Santosh

+1 Santosh Jha over 3 years ago in reply to Santosh Jha

TI__Guru 50611 points

Derek,

I just tried on my setup, and I think it works as expected.

I do not see the behavior you mentioned.

Thanks & Regards,

Santosh

0 Derek Cook over 3 years ago in reply to Santosh Jha

Intellectual 890 points

Seems like something else is going on here. isNan works elsewhere. Thanks for your help!

0 Derek Cook over 3 years ago in reply to Derek Cook

Intellectual 890 points

FYI this was caused by a mismapping of .switch. My program is in flash and .switch was in RAM. isnan was not the issue, my issue was the switch case statement.

0 Santosh Jha over 3 years ago in reply to Derek Cook

TI__Guru 50611 points

Derek,

Okay. yes, I will close this thread as we are supporting switch issue in other thread.

Thanks & Regards,

Santosh

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TMS320F280039C: isnan() is causing illegal operation