?? startup.s
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;/****************************************Copyright (c)**************************************************
;** Guangzou ZLG-MCU Development Co.,LTD.
;** graduate school
;** http://www.zlgmcu.com
;**
;**--------------File Info-------------------------------------------------------------------------------
;** File name: Startup.s
;** Last modified Date: 2004-09-17
;** Last Version: 1.0
;** Descriptions: The start up codes for LPC2100, including the initializing codes for the entry point of exceptions and the stacks of user tasks.
;** Every project should have a independent copy of this file for related modifications
;**------------------------------------------------------------------------------------------------------
;** Created by: Chenmingji
;** Created date: 2004-02-02
;** Version: 1.0
;** Descriptions: The original version
;**
;**------------------------------------------------------------------------------------------------------
;** Modified by: Chenmingji
;** Modified date: 2004-09-17
;** Version: 1.01
;** Descriptions: Modified the bus setting to adapt for many common situations
;**
;**------------------------------------------------------------------------------------------------------
;** Modified by: Chenmingji
;** Modified date: 2004-09-17
;** Version: 1.02
;** Descriptions: Added codes to support the enciphering of the chip
;**
;**------------------------------------------------------------------------------------------------------
;** Modified by: Chenmingji
;** Modified date: 2004-09-17
;** Version: 1.04
;** Descriptions: Renewed the template, added codes to support more compilers
;**
;**------------------------------------------------------------------------------------------------------
;** Modified by: Chenxibing
;** Modified date: 2004-12-09
;** Version: 1.05
;** Descriptions:
;**
;********************************************************************************************************/
;define the stack size
;定義堆棧的大小
SVC_STACK_LEGTH EQU 0
FIQ_STACK_LEGTH EQU 0
IRQ_STACK_LEGTH EQU 256
ABT_STACK_LEGTH EQU 0
UND_STACK_LEGTH EQU 0
NoInt EQU 0x80
NoFIQ EQU 0x40
USR32Mode EQU 0x10
SVC32Mode EQU 0x13
SYS32Mode EQU 0x1f
IRQ32Mode EQU 0x12
FIQ32Mode EQU 0x11
;The imported labels
;引入的外部標(biāo)號在這聲明
IMPORT FIQ_Exception ;Fast interrupt exceptions handler 快速中斷異常處理程序
IMPORT __main ;The entry point to the main function C語言主程序入口
IMPORT TargetResetInit ;initialize the target board 目標(biāo)板基本初始化
IMPORT __use_no_semihosting_swi
IMPORT __use_two_region_memory
;The emported labels
;給外部使用的標(biāo)號在這聲明
EXPORT bottom_of_heap
EXPORT StackUsr
EXPORT Reset
EXPORT __user_initial_stackheap
;啟動代碼入口
CODE32
AREA vectors,CODE,READONLY
ENTRY
;interrupt vectors
;中斷向量表
Reset
LDR PC, ResetAddr
LDR PC, UndefinedAddr
LDR PC, SWI_Addr
LDR PC, PrefetchAddr
LDR PC, DataAbortAddr
DCD 0xb9206e50
LDR PC, [PC, #-0x120]
LDR PC, FIQ_Addr
ResetAddr DCD ResetInit
UndefinedAddr DCD Undefined
SWI_Addr DCD SoftwareInterrupt
PrefetchAddr DCD PrefetchAbort
DataAbortAddr DCD DataAbort
Nouse DCD 0
IRQ_Addr DCD 0
FIQ_Addr DCD FIQ_Handler
;未定義指令
Undefined
B Undefined
;取指令中止
PrefetchAbort
B PrefetchAbort
;取數(shù)據(jù)中止
DataAbort
B DataAbort
;軟中斷
SoftwareInterrupt
; B SoftwareInterrupt
;//增加開/關(guān)中斷處理 Chenxibing-2004-02-09
CMP R0, #4
LDRLO PC, [PC, R0, LSL #2]
MOVS PC, LR
SwiFunction
DCD IRQDisable ;0
DCD IRQEnable ;1
DCD FIQDisable ;2
DCD FIQEnable ;3
IRQDisable
;關(guān)IRQ中斷
MRS R0, SPSR
ORR R0, R0, #NoInt
MSR SPSR_c, R0
MOVS PC, LR
IRQEnable
;開IRQ中斷
MRS R0, SPSR
BIC R0, R0, #NoInt
MSR SPSR_c, R0
MOVS PC, LR
FIQDisable
;關(guān)FIQ中斷
MSR CPSR_c, #(SVC32Mode|NoFIQ)
MRS R0, SPSR
ORR R0, R0, #NoFIQ
MSR SPSR_c, R0
MOVS PC, LR
FIQEnable
;開FIQ中斷
MSR CPSR_c, #(SVC32Mode|NoFIQ)
MRS R0, SPSR
BIC R0, R0, #NoFIQ
MSR SPSR_c, R0
MOVS PC, LR
;// Changed 2004-12-09
;快速中斷
FIQ_Handler
STMFD SP!, {R0-R3, LR}
BL FIQ_Exception
LDMFD SP!, {R0-R3, LR}
SUBS PC, LR, #4
;/*********************************************************************************************************
;** unction name 函數(shù)名稱: InitStack
;** Descriptions 功能描述: Initialize the stacks 初始化堆棧
;** input parameters 輸 入: None 無
;** Returned value 輸 出 : None 無
;** Used global variables 全局變量: None 無
;** Calling modules 調(diào)用模塊: None 無
;**
;** Created by 作 者: Chenmingji 陳明計
;** Created Date 日 期: 2004/02/02 2004年2月2日
;**-------------------------------------------------------------------------------------------------------
;** Modified by 修 改:
;** Modified date 日 期:
;**-------------------------------------------------------------------------------------------------------
;********************************************************************************************************/
InitStack
MOV R0, LR
;Build the SVC stack
;設(shè)置管理模式堆棧
MSR CPSR_c, #0xd3
LDR SP, StackSvc
;Build the IRQ stack
;設(shè)置中斷模式堆棧
MSR CPSR_c, #0xd2
LDR SP, StackIrq
;Build the FIQ stack
;設(shè)置快速中斷模式堆棧
MSR CPSR_c, #0xd1
LDR SP, StackFiq
;Build the DATAABORT stack
;設(shè)置中止模式堆棧
MSR CPSR_c, #0xd7
LDR SP, StackAbt
;Build the UDF stack
;設(shè)置未定義模式堆棧
MSR CPSR_c, #0xdb
LDR SP, StackUnd
;Build the SYS stack
;設(shè)置系統(tǒng)模式堆棧
MSR CPSR_c, #0xdf
LDR SP, =StackUsr
MOV PC, R0
;/*********************************************************************************************************
;** unction name 函數(shù)名稱: ResetInit
;** Descriptions 功能描述: RESET 復(fù)位入口
;** input parameters 輸 入: None 無
;** Returned value 輸 出 : None 無
;** Used global variables 全局變量: None 無
;** Calling modules 調(diào)用模塊: None 無
;**
;** Created by 作 者: Chenmingji 陳明計
;** Created Date 日 期: 2004/02/02 2004年2月2日
;**-------------------------------------------------------------------------------------------------------
;** Modified by 修 改: Chenmingji 陳明計
;** Modified date 日 期: 2004/02/02 2004年3月3日
;**-------------------------------------------------------------------------------------------------------
;********************************************************************************************************/
ResetInit
BL InitStack ;初始化堆棧 Initialize the stack
BL TargetResetInit ;目標(biāo)板基本初始化 Initialize the target board
;跳轉(zhuǎn)到c語言入口 Jump to the entry point of C program
B __main
;/*********************************************************************************************************
;** unction name 函數(shù)名稱: __user_initial_stackheap
;** Descriptions 功能描述: Initial the function library stacks and heaps, can not deleted! 庫函數(shù)初始化堆和棧，不能刪除
;** input parameters 輸 入: reference by function library 參考庫函數(shù)手冊
;** Returned value 輸 出 : reference by function library 參考庫函數(shù)手冊
;** Used global variables 全局變量: None 無
;** Calling modules 調(diào)用模塊: None 無
;**
;** Created by 作 者: Chenmingji 陳明計
;** Created Date 日 期: 2004/02/02 2004年2月2日
;**-------------------------------------------------------------------------------------------------------
;** Modified by
;** Modified date
;**-------------------------------------------------------------------------------------------------------
;********************************************************************************************************/
__user_initial_stackheap
LDR R0, =bottom_of_heap
; LDR R1, =StackUsr
LDR R2, =top_of_heap
LDR R3, =bottom_of_Stacks
MOV PC, LR
EXPORT _sys_exit
_sys_exit
B .
EXPORT __rt_div0
EXPORT fputc
EXPORT fgetc
EXPORT _sys_close
EXPORT _sys_write
EXPORT _sys_read
; EXPORT _ttywrch
EXPORT _sys_istty
EXPORT _sys_seek
EXPORT _sys_ensure
EXPORT _sys_flen
EXPORT _sys_tmpnam
EXPORT _sys_command_string
__rt_div0
fputc
fgetc
_sys_close
_sys_write
_sys_read
;_ttywrch
_sys_istty
_sys_seek
_sys_ensure
_sys_flen
_sys_tmpnam
_sys_command_string
NOP
MOV R0, #0
MOV PC, LR
StackSvc DCD SvcStackSpace + (SVC_STACK_LEGTH - 1)* 4
StackIrq DCD IrqStackSpace + (IRQ_STACK_LEGTH - 1)* 4
StackFiq DCD FiqStackSpace + (FIQ_STACK_LEGTH - 1)* 4
StackAbt DCD AbtStackSpace + (ABT_STACK_LEGTH - 1)* 4
StackUnd DCD UndtStackSpace + (UND_STACK_LEGTH - 1)* 4
;/*********************************************************************************************************
;** unction name 函數(shù)名稱: CrpData
;** Descriptions 功能描述: encrypt the chip
;** input parameters 輸 入: None 無
;** Returned value 輸 出 : None 無
;** Used global variables 全局變量: None 無
;** Calling modules 調(diào)用模塊: None 無
;**
;** Created by 作 者: Chenmingji 陳明計
;** Created Date 日 期: 2004/03/27 2004年3月27日
;**-------------------------------------------------------------------------------------------------------
;** Modified by 修 改:
;** Modified date 日 期:
;**-------------------------------------------------------------------------------------------------------
;********************************************************************************************************/
IF :DEF: EN_CRP
IF . >= 0x1fc
INFO 1,"\nThe data at 0x000001fc must be 0x87654321.\nPlease delete some source before this line."
ENDIF
CrpData
WHILE . < 0x1fc
NOP
WEND
CrpData1
DCD 0x87654321 ;/*When the Data is 為0x87654321,user code be protected. 當(dāng)此數(shù)為0x87654321時，用戶程序被保護(hù) */
ENDIF
;/* 分配堆棧空間 */
AREA MyStacks, DATA, NOINIT, ALIGN=2
SvcStackSpace SPACE SVC_STACK_LEGTH * 4 ;Stack spaces for Administration Mode 管理模式堆棧空間
IrqStackSpace SPACE IRQ_STACK_LEGTH * 4 ;Stack spaces for Interrupt ReQuest Mode 中斷模式堆棧空間
FiqStackSpace SPACE FIQ_STACK_LEGTH * 4 ;Stack spaces for Fast Interrupt reQuest Mode 快速中斷模式堆棧空間
AbtStackSpace SPACE ABT_STACK_LEGTH * 4 ;Stack spaces for Suspend Mode 中止義模式堆棧空間
UndtStackSpace SPACE UND_STACK_LEGTH * 4 ;Stack spaces for Undefined Mode 未定義模式堆棧
AREA Heap, DATA, NOINIT
bottom_of_heap SPACE 1
AREA StackBottom, DATA, NOINIT
bottom_of_Stacks SPACE 1
AREA HeapTop, DATA, NOINIT
top_of_heap
AREA Stacks, DATA, NOINIT
StackUsr
END
;/*********************************************************************************************************
;** End Of File
;********************************************************************************************************/
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