[Solved] Which of the following is the correct way to declare an ISR in FreeRTOS? — Ans: void vISR_Handler(void) __attribute__((interrupt)); | FreeRTOS

FreeRTOS - Interrupt Management

Which of the following is the correct way to declare an ISR in FreeRTOS?

Avoid vISR_Handler(void);

Bvoid vISR_Handler() { /* ISR code */ }

Cvoid vISR_Handler(void) __attribute__((interrupt));

Dvoid vISR_Handler(void) __attribute__((interrupt_handler));

Step-by-Step Solution

Solution:

Step 1: Review FreeRTOS ISR declaration requirements
FreeRTOS ISRs must use compiler and port specific attributes to generate proper ISR prologue/epilogue code.
Step 2: Check syntax correctness
void vISR_Handler(void) __attribute__((interrupt)); shows the correct declaration using standard GCC interrupt attribute for many FreeRTOS ports.
Final Answer:
void vISR_Handler(void) __attribute__((interrupt)); -> Option C
Quick Check:
ISR declaration = Compiler interrupt attribute [OK]

Quick Trick: FreeRTOS ISRs use compiler-specific interrupt attributes [OK]

Common Mistakes:

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Which of the following is the correct way to declare an ISR in FreeRTOS?