Ivthandleinterrupt ⚡ No Sign-up

void ivthandleinterrupt(void) uint32_t active_irq = NVIC->IABR[0]; // simplified // Find lowest set bit -> IRQ number int irq_num = __builtin_ctz(active_irq); if (isr_table[irq_num]) isr_table[irq_num]();

// 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

; Vector table entry for IRQ0 (system timer) .word _ivt_stub_timer ... The stub might look like: void ivthandleinterrupt(void) uint32_t active_irq = NVIC-&gt

// ... call ISR ...