irq.lst

keil mdk 周立功开发板中LPC2220芯片 蜂鸣器程序

ARM Macro Assembler    Page 1 


    1 00000000         ;/****************************************Copyright (c)*
                       *************************************************
    2 00000000         ;**                               Guangzou ZLG-MCU Devel
                       opment Co.,LTD.
    3 00000000         ;**                                      graduate school
                       
    4 00000000         ;**                                 http://www.zlgmcu.co
                       m
    5 00000000         ;**
    6 00000000         ;**--------------File Info------------------------------
                       -------------------------------------------------
    7 00000000         ;** File Name: IRQ.s
    8 00000000         ;** Last modified Date:  2004-06-14
    9 00000000         ;** Last Version: 1.1
   10 00000000         ;** Descriptions: The irq handle that what allow the int
                       errupt nesting. 
   11 00000000         ;**
   12 00000000         ;**-----------------------------------------------------
                       -------------------------------------------------
   13 00000000         ;** Created By: Chenmingji
   14 00000000         ;** Created date:   2004-09-17
   15 00000000         ;** Version: 1.0
   16 00000000         ;** Descriptions: First version
   17 00000000         ;**
   18 00000000         ;**-----------------------------------------------------
                       -------------------------------------------------
   19 00000000         ;** Modified by:
   20 00000000         ;** Modified date:
   21 00000000         ;** Version:
   22 00000000         ;** Descriptions:
   23 00000000         ;**
   24 00000000         ;*******************************************************
                       *************************************************/
   25 00000000         
   26 00000000         
   27 00000000 00000080 
                       NoInt   EQU              0x80
   28 00000000         
   29 00000000 00000010 
                       USR32Mode
                               EQU              0x10
   30 00000000 00000013 
                       SVC32Mode
                               EQU              0x13
   31 00000000 0000001F 
                       SYS32Mode
                               EQU              0x1f
   32 00000000 00000012 
                       IRQ32Mode
                               EQU              0x12
   33 00000000 00000011 
                       FIQ32Mode
                               EQU              0x11
   34 00000000         
   35 00000000         ;引入的外部标号在这声明
   36 00000000                 IMPORT           OSIntCtxSw  ;任务切换函数
   37 00000000                 IMPORT           OSIntExit   ;中断退出函数
   38 00000000                 IMPORT           OSTCBCur
   39 00000000                 IMPORT           OSTCBHighRdy



ARM Macro Assembler    Page 2 


   40 00000000                 IMPORT           OSIntNesting ;中断嵌套计数器
   41 00000000                 IMPORT           StackUsr
   42 00000000                 IMPORT           OsEnterSum
   43 00000000         
   44 00000000         
   45 00000000                 CODE32
   46 00000000         
   47 00000000                 PRESERVE8
   48 00000000         
   49 00000000                 AREA             IRQ,CODE,READONLY
   50 00000000         
   51 00000000         
   52 00000000                 MACRO
   53 00000000         $IRQ_Label
                               HANDLER          $IRQ_Exception_Function
   54 00000000         
   55 00000000                 EXPORT           $IRQ_Label  ; 输出的标号
   56 00000000                 IMPORT           $IRQ_Exception_Function 
                                                            ; 引用的外部标号
   57 00000000         
   58 00000000         $IRQ_Label
   59 00000000                 SUB              LR, LR, #4  ; 计算返回地址
   60 00000000                 STMFD            SP!, {R0-R3, R12, LR} 
                                                            ; 保存任务环境
   61 00000000                 MRS              R3, SPSR    ; 保存状态
   62 00000000                 STMFD            SP, {R3, SP, LR}^ ; 保存用户状