如何使用汇编直接向输入更改中断向量写入GOTO指令？

大家好，我想用一个中断来打开一个LED当一个开关是使用汇编，但我似乎不能让中断工作。当调试时，我发现在按下开关时，正在设置更改中断标志，但处理器不会进入ISR。有人能帮忙吗？编辑：我想我需要建立IVT。我现在的问题是，如何使用汇编直接向输入更改中断向量写入GOTO指令？



      以下为原文

    Hi everyone,

I'm trying to use an interrupt to turn on an LED when a switch is pressed using assembly but I can't seem to get the interrupt to work. When debugging, I found that the change interrupt flag is being set when the switch is pressed but the processor won't enter the ISR. Can anyone please help?

EDIT: I've figured out that I need to set up the IVT. My question now is; how do I write a GOTO instruction directly to the input change interrupt vector using assembly?

;*******************************************************************************
   
    .include "p24fj64ga002.inc"

    .global __reset
   
    .text
   
    __reset:
   
;*******************************************************************************
   
    ;Clear WREG
    CLR WREG
  
    ;Configure input and output pins
    BSET TRISB,#5 ;Set RB5 as input
    BCLR TRISB,#15 ;Clear RB15 as output
    BSET PORTB,#15 ;Set LED4 LOW
   
    ;Enable input change notification for CN27
    BSET CNEN2,#11
   
    ;Configure interrupt control registers
    BSET INTCON1,#15 ;Set NSTDIS control bit to disable nested interrupts
    MOV #0x7000,W0
    IOR IPC4 ;Set input change notification priority to highest
    BCLR IFS1,#3 ;Clear input change notification flag
    BSET IEC1,#3 ;Set input change notification interrupt enable

;*******************************************************************************
   
    ;Clear WREG. WREG is used to compare PORTB values to see if the input
    ;has actually changed.
    CLR WREG
   
    ;Move PORTB value into W1 register since PORTB,#5 will initially be high
    MOV PORTB,WREG
   
LOOP:
    GOTO LOOP
   
    .global __CNIInterrupt
__CNIInterrupt:
    BCLR IFS1,#3
    CPB PORTB
    BTSC SR,#1
    BTG PORTB,#15
    RETFIE
   
    .end