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Problem while using assembly instruction (__asm intrinsic)

Arun Kumar27
Intellectual 590 points


Hi,

I am trying to use __asm intrinsic to make jump to a location, but if i use this instruction in my code, the .out file doesn't get generated and i get the following error.

"MSP430: GEL: Encountered a problem loading file: C:\Users\Acer laptop\workspace_v6_1\FOTA_30July2015\Debug\FOTA_30July2015.out Could not open file"

What might be going wrong?

Thanks

Arun

  • 0
    Guru 16361 points

    It looks like the program failed to compile, so the debugger is unable to open the .out file. Try rebuilding the code and post any error messages from the compiler output.

    EDIT: Did you remember to leave a whitespace at the start of the assembly string? If this is missing then the opcode is treated as a label, which causes errors. If that isn't the problem, then post the whole __asm(" ")  line.

  • 0
    Guru 25210 points

    Why are you using that route (inline assembly) to jump to a location? You can do that in C:

    // Place the typedef and #define at the top of the file
// where you need the jump, or include them in a header file

typedef void (*tVoidFuncP)(void);
#define JUMP_TO_LOCATION(x) ((tVoidFuncP)(x))

// Then in your code where you need to execute the hard jump:
JUMP_TO_LOCATION(0xC000); // jump to 0xC000

    This is portable method of doing a branch and is better than inline assembly.

  • 0 in reply to Brian Boorman
    Intellectual 590 points

    Hi,

    1. I solved it by using call and also mov instructions, i observed that if the asm statement under quotes is not correct it throws load program error.

    2. I tried the C approach suggested by Brian , i got this warning "Statement not effective" at JUMP_TO_LOCATION(0xc000); and while executing it doesn't jump to the address.

    Any idea about this warning?

    Regards

    Arun

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