Question

13.3.1 - What is the vector label that we need to use when initializing the vector address in C for a port 2 interrupt?

Question 1 options:

	#pragma vector = P2_VECTOR
	#pragma vector = PORT2_VECTOR
	#pragma_vector = VECTOR_P2
	#pragma_vector = VECTOR_PORT2

13.3.2 - What is the vector label that we need to use when initializing the vector address in C for a port 3 interrupt?

Question 2 options:

	#pragma_vector = VECTOR_PORT3
	#pragma_vector = P3_VECTOR
	#pragma vector = VECTOR_P3
	#pragma vector = PORT3_VECTOR

13.3.3 - What does the __enable_interrupt() function do?

Question 3 options:

	Toggles the GIE bit in the status register
	Clears the GIE bit in the status register
	Sets the GIE bit in the status register
	Complements the GIE bit in the status register

Answer 1

Ans. 1 #pragma_vector = VECTOR_P2 , is the right initialisation for vector address with pragma in C for port2 interrupts. .

Ans 2 similiarly from above ,   #pragma_vector = VECTOR_P3 , is the right initialisation for vector address with pragma in C for port3 interrupts.

Ans3. __enable_interrupt() function enables global interrupts by setting the GIE bit in the status register and also returns the value of the status register before the GIE bit is set .