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

Mark Feller

Expert 1220 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

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

0 Omer Amir over 1 year ago

Hello Mark,

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

        .global _testisr
        .global _testfunc

_testisr:
        LCR _testfunc
        NOP
        IRET

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