CCS/MSP430FR5994: Disabling register optimizations breaks DMA, possible compiler bug.

ic434

Part Number: MSP430FR5994

Tool/software: Code Composer Studio

So I am working on some code for the MSP430FR5994 using driverlib and UCIAB0 in I2C slave mode with DMA channels 0+1 using Triggers 18 and 19. The code functions as expected with register optimizations turned on however the receive DMA does not function if they are turned off. I am not sure how to even begin to debug this issue. But it would seem there is a bug in the compiler with optimizations set to off.

If I have some time I'll try dumping the generated assembly and diffing but right now I need to focus on getting this thing working and out the door.

over 6 years ago

0 Johnson He over 6 years ago

TI__Mastermind 30356 points

Hi,

Is it convenient to provide some of the code you are having problems with?

This will make it easier for me to test and diagnose this problems.

Best Regards

Johnson

0 ic434 over 6 years ago in reply to Johnson He

Prodigy 60 points

Johnson,

I will see what I can do. Might be a week or two.

Cheers,

Michael

0 Johnson He over 6 years ago in reply to ic434

TI__Mastermind 30356 points

Hi ,

Ok, Thanks. Waiting for your feedback.

Best Regards

Johnson

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CCS/MSP430FR5994: Disabling register optimizations breaks DMA, possible compiler bug.