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发表于 2013-4-17 11:00:38
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tangcdong 发表于 2013-4-17 10:10 
那样子不行吧，boot与应用程序的中断向量表是独立的，你应用程序使用boot中断向量不是乱透了。 ...
;/*****************************************************************************
;* startup.s: startup file for NXP LPC230x Family Microprocessors
;*
;* Copyright(C) 2006, NXP Semiconductor
;* All rights reserved.
;*
;* History
;* 2006.09.01 ver 1.00 Prelimnary version, first Release
;*
;*****************************************************************************/
PRESERVE8
;/*
; * The STARTUP.S code is executed after CPU Reset. This file may be
; * translated with the following SET symbols. In uVision these SET
; * symbols are entered under Options - ASM - Define.
; *
; * REMAP: when set the startup code initializes the register MEMMAP
; * which overwrites the settings of the CPU configuration pins. The
; * startup and interrupt vectors are remapped from:
; * 0x00000000 default setting (not remapped)
; * 0x40000000 when RAM_MODE is used
; *
; * RAM_MODE: when set the device is configured for code execution
; * from on-chip RAM starting at address 0x40000000.
; */
; Standard definitions of Mode bits and Interrupt (I & F) flags in PSRs
Mode_USR EQU 0x10
Mode_FIQ EQU 0x11
Mode_IRQ EQU 0x12
Mode_SVC EQU 0x13
Mode_ABT EQU 0x17
Mode_UND EQU 0x1B
Mode_SYS EQU 0x1F
I_Bit EQU 0x80 ; when I bit is set, IRQ is disabled
F_Bit EQU 0x40 ; when F bit is set, FIQ is disabled
;// <h> Stack Configuration (Stack Sizes in Bytes)
;// <o0> Undefined Mode <0x0-0xFFFFFFFF:8>
;// <o1> Supervisor Mode <0x0-0xFFFFFFFF:8>
;// <o2> Abort Mode <0x0-0xFFFFFFFF:8>
;// <o3> Fast Interrupt Mode <0x0-0xFFFFFFFF:8>
;// <o4> Interrupt Mode <0x0-0xFFFFFFFF:8>
;// <o5> User/System Mode <0x0-0xFFFFFFFF:8>
;// </h>
UND_Stack_Size EQU 0x00000000
SVC_Stack_Size EQU 0x00000100
ABT_Stack_Size EQU 0x00000000
FIQ_Stack_Size EQU 0x00000000
IRQ_Stack_Size EQU 0x00000120 ;每层嵌套需要9个字堆栈，允许8层嵌套
USR_Stack_Size EQU 0x00000200
Stack_Size EQU (UND_Stack_Size + SVC_Stack_Size + ABT_Stack_Size + \
FIQ_Stack_Size + IRQ_Stack_Size + USR_Stack_Size)
AREA STACK, NOINIT, READWRITE, ALIGN=3
Stack_Mem SPACE Stack_Size
StackUsr EQU Stack_Mem+USR_Stack_Size
Stack_Top EQU Stack_Mem + Stack_Size
EXPORT StackUsr ;声明为外部标号，供IRQ.S调用。
;// <h> Heap Configuration
;// <o> Heap Size (in Bytes) <0x0-0xFFFFFFFF>
;// </h>
Heap_Size EQU 0x00000001
AREA HEAP, NOINIT, READWRITE, ALIGN=3
Heap_Mem SPACE Heap_Size
; Area Definition and Entry Point
; Startup Code must be linked first at Address at which it expects to run.
;引入的外部标号在这声明
IMPORT FIQ_Exception ;快速中断异常处理程序
IMPORT __main ;C语言主程序入口
IMPORT TargetResetInit ;目标板基本初始化
IMPORT SoftwareInterrupt ;软件中断的处理函数
EXPORT Vectors
AREA RESET, CODE, READONLY
ARM
; Exception Vectors
; Mapped to Address 0.
; Absolute addressing mode must be used.
; Dummy Handlers are implemented as infinite loops which can be modified.
;;中断向量表
;;对于1.未定义指令 2.预取指中止 3.数据中止三种异常不做处理
;;
ENTRY
Vectors LDR PC, Reset_Addr
LDR PC, Undef_Addr
LDR PC, SWI_Addr
LDR PC, PAbt_Addr
LDR PC, DAbt_Addr
NOP ; Reserved Vector
; LDR PC, IRQ_Addr
LDR PC, [PC, #-0x0120] ; Vector from VicVectAddr
LDR PC, FIQ_Addr
Reset_Addr DCD Reset_Handler
Undef_Addr DCD Undef_Handler
SWI_Addr DCD SoftwareInterrupt
PAbt_Addr DCD PAbt_Handler
DAbt_Addr DCD DAbt_Handler
DCD 0xB9206E28 ; Reserved Address
;IRQ_Addr DCD IRQ_Handler
FIQ_Addr DCD FIQ_Handler
Undef_Handler B Undef_Handler
;SWI_Handler B SWI_Handler
PAbt_Handler B PAbt_Handler
DAbt_Handler B DAbt_Handler
;IRQ_Handler B IRQ_Handler
FIQ_Handler
STMFD SP!, {R0-R3, LR}
BL FIQ_Exception
LDMFD SP!, {R0-R3, LR}
SUBS PC, LR, #4
; Reset Handler
EXPORT Reset_Handler
Reset_Handler
; Setup Stack for each mode
; LDR R0, =Stack_Top
; Enter Undefined Instruction Mode and set its Stack Pointer
; MSR CPSR_c, #Mode_UND:OR:I_Bit:OR:F_Bit
; MOV SP, R0
; SUB R0, R0, #UND_Stack_Size
; Enter Abort Mode and set its Stack Pointer
; MSR CPSR_c, #Mode_ABT:OR:I_Bit:OR:F_Bit
; MOV SP, R0
; SUB R0, R0, #ABT_Stack_Size
; Enter FIQ Mode and set its Stack Pointer
; MSR CPSR_c, #Mode_FIQ:OR:I_Bit:OR:F_Bit
; MOV SP, R0
; SUB R0, R0, #FIQ_Stack_Size
; Enter IRQ Mode and set its Stack Pointer
; MSR CPSR_c, #Mode_IRQ:OR:I_Bit:OR:F_Bit
; MOV SP, R0
; SUB R0, R0, #IRQ_Stack_Size
; Enter Supervisor Mode and set its Stack Pointer
; MSR CPSR_c, #Mode_SVC:OR:I_Bit:OR:F_Bit
; MOV SP, R0
; SUB R0, R0, #SVC_Stack_Size
; Enter User Mode and set its Stack Pointer
; MSR CPSR_c, #Mode_USR
; MOV SP, R0
; SUB SL, SP, #USR_Stack_Size
MOV R8,#0x40000000
LDR R9,=Vectors
LDMIA R9!,{R0-R7}
STMIA R8!,{R0-R7}
LDMIA R9!,{R0-R7}
STMIA R8!,{R0-R7}
;//使用remap ram
;LDR R8,=MEMMAP
LDR R8,=0xE01FC040
MOV R9,#0x02
STR R9, [R8]
; IMPORT TargetResetInit
BL TargetResetInit ;在target.c文件中
; Enter the C code
; IMPORT __main
LDR R0, =__main
BX R0
; User Initial Stack & Heap
;;函数说明参考RV_CC.PDF文件P291
;;function: __user_initial_stackheap
;;description:初始化堆栈(stack)和堆(heap),函数采用双存储器区域。
;;parameter:r0,sp,r2
;;return value:r0--堆的基址（heap base in r0）
;;r1--堆栈基址，堆栈区域的最高地址
;;r2--堆的限制地址(heap limit in r2)
;;r3--堆栈限制地址，堆栈区域的最低地址
;;
AREA |.text|, CODE, READONLY
IMPORT __use_two_region_memory ;select memory model of two memory region
EXPORT __user_initial_stackheap
__user_initial_stackheap
LDR R0, = Heap_Mem
LDR R1, =(Stack_Mem + USR_Stack_Size)
LDR R2, = (Heap_Mem + Heap_Size)
LDR R3, = Stack_Mem
BX LR
END
比较了你的keil下的应用程序与正常情况下的程序，有几点比较奇怪：
1、你的应用程序的启动代码的堆栈初始化部分被注释掉了
2、Heap_Size EQU 0x00000001 这个地方为什么是1 我看其他的网上下载的例程是0
而且__user_initial_stackheap貌似也没有被执行
设置中不同的是：
rom其实地址为0x8000
ram起始地址为0x40003000
这个还是可以理解的 |
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