But a more robust ivthandleinterrupt would query the hardware:
// Array of registered interrupt callbacks static void (*isr_table[MAX_IRQS])(void); void register_isr(int irq_num, void (*handler)(void)) if (irq_num < MAX_IRQS) isr_table[irq_num] = handler; ivthandleinterrupt
Introduction In the world of low-level embedded programming, few concepts are as critical—yet as poorly documented for beginners—as the Interrupt Vector Table (IVT) and its associated handler functions. Among the various naming conventions used across microcontroller architectures (such as ISR , _irq , or vector ), one specific term appears in proprietary Real-Time Operating Systems (RTOS) and legacy firmware codebases: ivthandleinterrupt . But a more robust ivthandleinterrupt would query the
__set_BASEPRI(current_mask); While you are unlikely to find ivthandleinterrupt in modern ARM CMSIS code or Zephyr RTOS, understanding this function name unlocks the ability to maintain legacy embedded products. It represents a specific pattern: a software-intermediated interrupt dispatcher that decouples the vector table from the application ISRs. void register_isr(int irq_num