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TMS320F28027: How to call C function from ISR written in assembly?

Mark Feller
Expert 1050 points
Part Number: TMS320F28027

Do I need to do anything special with a C function called from an ISR written in assembly?

For example, is this okay:

Assembly

.global _testisr
.global _testfunc

_testisr:
LCR _testfunc
NOP
IRET

C

void testfunc(){
GpioDataRegs.GPATOGGLE.bit.GPIO1 = 1;
}

  • 0
    TI__Mastermind 30185 points

    Hello Mark,

    What you have is fine, just make sure you have proper indentation for your assembly code otherwise you will get compiler errors:

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    .global _testisr
    .global _testfunc
    _testisr:
    LCR _testfunc
    NOP
    IRET
    XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX