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Calling assembly functions

Lalindra Jayatilleke
Mastermind 30365 points


You can call assembly functions using something similar to the code below. Essentially, it is a method of referencing functions from the .asm in your .c file. 

// test_default.asm

                .def test_func

test_func:

                NOP

--------------------------------------

// main.c

extern void test_func();

void main(void)

{ 

 test_func();

}

  • 0
    TI__Guru**** 171309 points

    Lali,

    In the assembly code you need to define your function with a leading underscore so it can be recognized by the C environment. Thus, you need to change test_func to _test_func in yoru <test_default.asm> file.

    Reference: section 5.13 of the MSP430 C/C++ User's Guide (SLAU132G).

    Hope this helps,

    Rafael

    P.S. Sorry, I couldn't reply to your e-mail in time.