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 LPC2200, 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:
- ;** Modified date:
- ;** Version:
- ;** Descriptions:
- ;**
- ;********************************************************************************************************/
- ;define the stack size
- ;定义堆栈的大小
- FIQ_STACK_LEGTH EQU 0
- IRQ_STACK_LEGTH EQU 9*8 ;every layer need 9 bytes stack , permit 8 layer .每层嵌套需要9个字堆栈，允许8层嵌套
- ABT_STACK_LEGTH EQU 0
- UND_STACK_LEGTH EQU 0
- NoInt EQU 0x80
- USR32Mode EQU 0x10
- SVC32Mode EQU 0x13
- SYS32Mode EQU 0x1f
- IRQ32Mode EQU 0x12
- FIQ32Mode EQU 0x11
- PINSEL2 EQU 0xE002C014
- BCFG0 EQU 0xFFE00000
- BCFG1 EQU 0xFFE00004
- BCFG2 EQU 0xFFE00008
- BCFG3 EQU 0xFFE0000C
- IMPORT __use_no_semihosting_swi
- IMPORT __use_two_region_memory
- ;The imported labels
- ;引入的外部标号在这声明
- IMPORT FIQ_Exception ;Fast interrupt exceptions handler 快速中断异常处理程序
- IMPORT __main ;The entry point to the main function C语言主程序入口
- IMPORT TargetResetInit ;initialize the target board 目标板基本初始化
- IMPORT SoftwareInterrupt
- ;The emported labels
- ;给外部使用的标号在这声明
- EXPORT bottom_of_heap
- EXPORT bottom_of_Stacks
- EXPORT top_of_heap
- EXPORT StackUsr
-
- EXPORT Reset
- EXPORT __user_initial_stackheap
- CODE32
- AREA vectors,CODE,READONLY
- ENTRY
- ;interrupt vectors
- ;中断向量表
- Reset
- LDR PC, ResetAddr
- LDR PC, UndefinedAddr
- LDR PC, SWI_Addr
- LDR PC, PrefetchAddr
- LDR PC, DataAbortAddr
- DCD 0xb9205f80
- LDR PC, [PC, #-0xff0]
- 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
- ;未定义指令
- Undefined
- B Undefined
-
- ;取指令中止
- PrefetchAbort
- B PrefetchAbort
- ;取数据中止
- DataAbort
- B DataAbort
- ;快速中断
- FIQ_Handler
- STMFD SP!, {R0-R3, LR}
- BL FIQ_Exception
- LDMFD SP!, {R0-R3, LR}
- SUBS PC, LR, #4
- ;/*********************************************************************************************************
- ;** unction name 函数名称: InitStack
- ;** Descriptions 功能描述: Initialize the stacks 初始化堆栈
- ;** input parameters 输 入: None 无
- ;** Returned value 输 出 : None 无
- ;** Used global variables 全局变量: None 无
- ;** Calling modules 调用模块: None 无
- ;**
- ;** Created by 作 者: Chenmingji 陈明计
- ;** 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
- ;设置中断模式堆栈
- MSR CPSR_c, #0xd2
- LDR SP, StackIrq
- ;Build the FIQ stack
- ;设置快速中断模式堆栈
- MSR CPSR_c, #0xd1
- LDR SP, StackFiq
- ;Build the DATAABORT stack
- ;设置中止模式堆栈
- MSR CPSR_c, #0xd7
- LDR SP, StackAbt
- ;Build the UDF stack
- ;设置未定义模式堆栈
- MSR CPSR_c, #0xdb
- LDR SP, StackUnd
- ;Build the SYS stack
- ;设置系统模式堆栈
- MSR CPSR_c, #0xdf
- LDR SP, =StackUsr
- MOV PC, R0
- ;/*********************************************************************************************************
- ;** unction name 函数名称: ResetInit
- ;** Descriptions 功能描述: RESET 复位入口
- ;** input parameters 输 入: None 无
- ;** Returned value 输 出 : None 无
- ;** Used global variables 全局变量: None 无
- ;** Calling modules 调用模块: None 无
- ;**
- ;** Created by 作 者: Chenmingji 陈明计
- ;** Created Date 日 期: 2004/02/02 2004年2月2日
- ;**-------------------------------------------------------------------------------------------------------
- ;** Modified by 修 改: Chenmingji 陈明计
- ;** Modified date 日 期: 2004/02/02 2004年3月3日
- ;**-------------------------------------------------------------------------------------------------------
- ;********************************************************************************************************/
- ResetInit
- ;Initial the extenal bus controller
- ;初始化外部总线控制器，根据目标板决定配置
- LDR R0, =PINSEL2
- IF :DEF: EN_CRP
- LDR R1, =0x0f814910
- ELSE
- LDR R1, =0x0f814914
- ENDIF
- STR R1, [R0]
- LDR R0, =BCFG0
- LDR R1, =0x1000ffef
- STR R1, [R0]
- LDR R0, =BCFG1
- LDR R1, =0x1000ffef
- STR R1, [R0]
- ; LDR R0, =BCFG2
- ; LDR R1, =0x2000ffef
- ; STR R1, [R0]
- ; LDR R0, =BCFG3
- ; LDR R1, =0x2000ffef
- ; STR R1, [R0]
-
- BL InitStack ; Initialize the stack 初始化堆栈
- BL TargetResetInit ; Initialize the target board 目标板基本初始化
- ; Jump to the entry point of C program 跳转到c语言入口
- B __main
- ;/*********************************************************************************************************
- ;** unction name 函数名称: __user_initial_stackheap
- ;** Descriptions 功能描述: Initial the function library stacks and heaps, can not deleted! 库函数初始化堆和栈，不能删除
- ;** input parameters 输 入: reference by function library 参考库函数手册
- ;** Returned value 输 出 : reference by function library 参考库函数手册
- ;** Used global variables 全局变量: None 无
- ;** Calling modules 调用模块: None 无
- ;**
- ;** Created by 作 者: Chenmingji 陈明计
- ;** 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
-
- 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 函数名称: CrpData
- ;** Descriptions 功能描述: encrypt the chip
- ;** input parameters 输 入: None 无
- ;** Returned value 输 出 : None 无
- ;** Used global variables 全局变量: None 无
- ;** Calling modules 调用模块: None 无
- ;**
- ;** Created by 作 者: Chenmingji 陈明计
- ;** 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 为0x87654321,user code be protected. 当此数为0x87654321时，用户程序被保护 */
- ENDIF
- ;/* 分配堆栈空间 */
- AREA MyStacks, DATA, NOINIT, ALIGN=2
- IrqStackSpace SPACE IRQ_STACK_LEGTH * 4 ;Stack spaces for Interrupt ReQuest Mode 中断模式堆栈空间
- FiqStackSpace SPACE FIQ_STACK_LEGTH * 4 ;Stack spaces for Fast Interrupt reQuest Mode 快速中断模式堆栈空间
- AbtStackSpace SPACE ABT_STACK_LEGTH * 4 ;Stack spaces for Suspend Mode 中止义模式堆栈空间
- UndtStackSpace SPACE UND_STACK_LEGTH * 4 ;Stack spaces for Undefined Mode 未定义模式堆栈
- 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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