IRQHandler
; Enhanced Interrupt Controller. EIC_base_addr EQU 0xFFFFF800;
LDR r0, =EIC_base_addr
;IVR_off_addr EQU 0x18 ; Interrupt Vector Register offset
LDR r1, =IVR_off_addr
ADD pc,r0,r1 ; Branch to the IRQ handler.
比如Timer0产生了中断, 程序是如何跳到Timer0的ISR的?