MSP430 Coding, Can I Place an Interrupt Vector Inside a Function?

Question

As the title said, I am trying to see if an Interrupt Vector can be embedded inside a function? I am using IAR, but gcc or ccs would work too. I don't see it done in any code online. Example:

void function_funtime (int test){
 int lm4970_state = 0;
 int abc = test + 3;
 // Port 1 interrupt service routine
 #pragma vector = PORT1_VECTOR
 __interrupt void Port_1_ISR (void)
 {
 _BIC_SR_IRQ(LPM3_bits + GIE); // Clear LPM/Disable Interrupts
 lm4970_state++; // Increase LM4970 state by 1
 P1IFG &= ~PB; // P1.3 IFG cleared
 }
}

Function "function_funtime" is called from the main code before the interrupt is ever seen. Can this be done?

• user28910: Is nesting function definitions not prohibited in C?
• user28910: And even if you could, why would you want to?
• Rev: XY problem: You are asking about your attempted solution rather than your actual problem.
• Passerby: @Rev1.0 making tidy code that I can move between projects without having to pick through which ISR goes with which functions, without needing ifdefined checks or anything like that.
• Rev: Hmm, if you want to "share" code between projects, wouldn't it be cleaner to create an independent module (c/h file combo)? That way you can encapsulate the ISR and just expose function_funtime() from the header.

Answer 1

No.

You can't define a function inside of another function in C. I'm not sure what you're trying to do, but maybe you can set flags for the ISR in the function or simply enable the interrupt in the function. Either of those may have the same effect.

• Passerby: Hmm, I could do if defined checks...