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The different between xem4 and. out file

li dong
Prodigy 240 points

Hi，

      now i use the vayu evm board, i see the linux kernel boot the Crotex-M4 as bellow:

[ 8.772918] remoteproc1: powering up ipu2
[ 8.794555] remoteproc1: Booting fw image dra7-ipu2-fw.xem4, size 4001085

     but i want to use ccs in windows to develop the Crotex-M4 and C66, the out file is .out, can it be boot use the

evm board linux kernel to boot?

  • 0
    TI__Mastermind 18260 points

    You can rename your .out file to dra7-ipu2-fw.xem4 and place it in your target filesystem's /lib/firmware directory.

    As an alternative, you can configure the CCS project to create the output executable with an extension different than .out.  You can use the --output_file=<filename> linker option to specify a different output name.

    To be loaded by remoteproc, your executable must contain the resource table and be linked to the correct memory locations as reflected by that resource table.  The Ipc product examples do this, so they should be used as a starting point.

    Regards,

    - Rob

  • 0
    TI__Mastermind 30830 points

    'Yes', is the short answer to your question.

    Executables built with CCS  have '.out' as their file extension.

    Executables built using a RTSC native build flow under a Linux or DOS command line are tagged with an extension unique to the RTSC target used to build the application.

    In this case, '.xem4' is the file extension associated with executables built using the RTSC native build flow (most likely under Linux) with the 'ti.targets.arm.elf.M4' RTSC target.

    In terms of executable file structure, there is no difference between a 'app.out' file and a 'app.xem4' file.

    Alan

  • 0 in reply to Alan DeMars
    Prodigy 240 points

    Hi,

        I have know the .xem4 file is a elf format,the same as .out,because the file star as "0x7f 0x45 0x4c 0x46"(ELF).

        but when i use a elf profile tool(micrium uc/probe), the .xem4 show as  bellow:

     

    and the .out file is ok.

    Why is it so?