irq5.asm

来自「基于凌阳单片机远程电话报警系统程序。」· 汇编 代码 · 共 27 行

.INCLUDE hardware.inc
.TEXT
.PUBLIC _IRQ5
_IRQ5:
    INT OFF
   PUSH R1,R5 TO [SP]
   R1=0x0004
   TEST R1,[P_INT_Ctrl]
   JNZ IRQ5_2HZ
 IRQ5_4HZ: R1=0x0008
       GOTO lpp
 IRQ5_2HZ:         
   R1=[0x06fb]
   R1+=1
   [0x06fb]=R1
   R2=0x0080
   CMP R2,R1
   JNZ lpp
   
    R1=0x0000
    [0x06fe]=R1
    [0x06fb]=R1
  lpp: R1=0x0004
    [P_INT_Clear]=R1
    pop R1,R5 from [sp]
    INT IRQ
    RETI