;/****************************************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: ;** 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 IMPORT __use_no_semihosting_swi ;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 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: InitStack ;** Descriptions: Initialize the stacks ;** input parameters: None ;** Returned value: None ;** Used global variables: None ;** Calling modules: None ;** ;** Created by: Chenmingji ;** Created Date: 2004/02/02 ;**------------------------------------------------------------------------------------------------------- ;** Modified by: ;** Modified date: ;**------------------------------------------------------------------------------------------------------- ;********************************************************************************************************/ 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: ResetInit ;** Descriptions: RESET ;** input parameters: None ;** Returned value: None ;** Used global variables: None ;** Calling modules: None ;** ;** Created by: Chenmingji ;** Created Date: 2004/02/02 ;**------------------------------------------------------------------------------------------------------- ;** Modified by: Chenmingji ;** Modified date: 2004/02/02 ;**------------------------------------------------------------------------------------------------------- ;********************************************************************************************************/ ResetInit 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: __user_initial_stackheap ;** Descriptions: Initial the function library stacks and heaps, can not deleted! ;** input parameters: reference by function library ;** Returned value: reference by function library ;** Used global variables: None ;** Calling modules: None ;** ;** Created by: Chenmingji ;** Created Date: 2004/02/02 ;**------------------------------------------------------------------------------------------------------- ;** Modified by ;** Modified date ;**------------------------------------------------------------------------------------------------------- ;********************************************************************************************************/ __user_initial_stackheap LDR r0,=bottom_of_heap ; LDR r1,=StackUsr 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: CrpData ;** Descriptions: encrypt the chip ;** input parameters: None ;** Returned value: None ;** Used global variables: None ;** Calling modules: None ;** ;** Created by: Chenmingji ;** Created Date: 2004/03/27 ;**------------------------------------------------------------------------------------------------------- ;** Modified by: ;** Modified date: ;**------------------------------------------------------------------------------------------------------- ;********************************************************************************************************/ 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.*/ 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 FiqStackSpace SPACE FIQ_STACK_LEGTH * 4 ;Stack spaces for Fast Interrupt reQuest Mode AbtStackSpace SPACE ABT_STACK_LEGTH * 4 ;Stack spaces for Suspend Mode UndtStackSpace SPACE UND_STACK_LEGTH * 4 ;Stack spaces for Undefined Mode AREA Heap, DATA, NOINIT bottom_of_heap SPACE 1 AREA Stacks, DATA, NOINIT StackUsr END ;/********************************************************************************************************* ;** End Of File ;********************************************************************************************************/