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Error: Instruction requires VFP or NEON support.

Gowdham Natarajan
Intellectual 610 points

Hi,

I am using TMDX570LS20SUSB controller. In CCS, i am trying to enable and initialize the floating point option. But it shows error as,

PROBLEM 1:

 mrc   p15,     #0x00,      r0,       c1, c0, #0x02
 orr   r0,      r0,         #0xF00000
 mcr   p15,     #0x00,      r0,       c1, c0, #0x02
 mov   r0,      #0x40000000
 fmxr  fpexc,   r0

[E0002] Instruction requires VFP or NEON support. (While --float_support = None)

and if i enable --float_support = VFPv3D16

fatal error: file "../lib/pf035a_api_eabi.lib<blank.obj>" was built without VFP coprocessor support while a previously seen file was; combining incompatible files.

PROBLEM 2:

I don't know how to move the value which is present in the FPSCR register to the local variable we are using in our code. For ex,

UInt32 temp;

.........

.........

{Here i want to write a code to transfer the value of the register FPSCR to the "temp" variable for further process}

Please let me know how to resolve this problem.

 

Thanks and Regards

Gowdham Natarajan

  • 0
    TI__Genius 9015 points

    When using floating point on the TMS570LS20xx devices, you need to use the pf035a_api_eabi_vfp.lib.  This version of the library is compiled with the floating point support.

  • 0 in reply to John Hall
    Intellectual 610 points

    Dear John,

    Thanks for your information. I couldn't find this "pf035a_api_eabi_vfp.lib" file in my PC. I searched completely under CCS installation directory as well as in net. I coudn't find this .lib file. Could you please help me with the link to get this file.

    I have a doubt that, whether we need to include this .lib file while compiling through CCS or by setting some option CCS generate this .lib file. I need some clear information about this.

     

    Thanks and Regards

    Gowdham Natarajan

  • 0 in reply to Gowdham Natarajan
    TI__Genius 9015 points

    Gowdham,

    The Platform F035a Flash API libraries are not installed under CCS.  If you allowed for default installation of the API, it would be under C:\ti\pf035a_api\v1.05.  If you cannot find your install or you were just given the library file, you can download the installer for this API from here http://www.ti.com/tool/f035flashapi.

  • 0 in reply to John Hall
    Intellectual 610 points

    Dear John,

    Thanks for your valuable information. VFP support issue is resolved. But, other issue i am facing now is, posted as a new one. Please find the post link below,

    http://e2e.ti.com/support/microcontrollers/hercules/f/312/t/140963.aspx

    Is there any suggestions or ideas regarding this, Please let me know.

     

    Thanks and Regards

    Gowdham Natarajan

  • 0 in reply to Gowdham Natarajan
    TI__Genius 9015 points

    Gowdham,

    I will have to let someone else take the lead on your new question as that is not my area of expertise.

  • 0
    Prodigy 130 points

    Hi  Gowdham,

    I am working on TMS570 processor and I tried to initialize VFP unite without succes, In fact I didn't know How do you include the new library, Can you explain to me how the FPU must be initialized? or can you send me code application?

    It's very important for my internship to know this information

    Thanks

    PS I posted my question in the Forum  http://e2e.ti.com/support/microcontrollers/hercules/f/312/p/188653/680647.aspx#680647