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CCS/TMS570ls1224: Unable to run Performance Measurement Unit code without Vectored Floating Point Unit

Eirik Nobuki Kosaka
Prodigy 140 points
Part Number: TMS570LS1224
Other Parts Discussed in Thread: HALCOGEN

Tool/software: Code Composer Studio

So I have some code that I want to benchmark with and without the Vectored Floating Point Unit using the PMU. Everything is good with the VFP enabled, however when I disable the VFP in halcogen the code does not run. I am able to build and load it to the microcontroller, but it just stops running. I did find another post having some similar problems when using RTI instead of the VFP, is this a known problem, or is there something I am doing wrong?

 

  • 0
    TI__Guru 59540 points
    Hello Erlik,

    Can you provide more detail about what happens to your code? i.e., you state that it "just stops running" but you don't indicate if it hangs on a specific instruction or code construct or if it ends up in an abort of some type. If I had to make a guess, I would speculate that, although the VFP is disabled, it is still including an instruction that requires the VFP or it is accessing a portion of the CPU related to it. Also, if you could provide a link to the post about the RTI, I could have a look to see if there is any relation to the issue you are seeing. The RTI is a TI IP and not located in the CPU as the VFP is so it is doubtful if the issues are directly related.
  • 0 in reply to Chuck Davenport
    Prodigy 140 points
    Yes you were right, i made a mistake using a float instead of and this made my whole program "hang". Thank you for a quick answer anyway

    Eirik Nobuki Kosaka