8: InitStack
MOV R0, LR
;Build the SVC stack
;设置管理模式堆栈
MSR CPSR_c, #0xd3
LDR SP, StackSvc
;Build the IRQ 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, #0x5f ;#0xdf
LDR SP, =StackUsr
MOV PC, R0
9: BL InitStack ;初始化堆栈 Initialize the stack
BL TargetResetIni;目标板基本初始化 ;跳转到c语言入口 Jump to the entry point of C program
B __main
周立功启动代码:
;/****************************************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//原著
;**
;**------------------------------------------------------------------------------------------------------
;** Modified by: Chenmingji
;** Modified date: 2004-09-17
;** Version: 1.01
;** Descriptions: Modified the bus setting to adapt for many common situations
;** //改进了总线,可以根据这里的更改来控制总线的速率
;**------------------------------------------------------------------------------------------------------
;** Modified by: Chenmingji
;** Modified date: 2004-09-17
;** Version: 1.02
;** Descriptions: Added codes to support the enciphering of the Chip
;** //增加了芯片加密
;**------------------------------------------------------------------------------------------------------
;** Modified by: Chenmingji
;** Modified date: 2004-09-17
;** Version: 1.04
;** Descriptions: Renewed the template, added codes to support more compilers
;** //重建模板,加入更多代码来支持更多的编译
;**------------------------------------------------------------------------------------------------------
;** Modified by:
;** Modified date:
;** Version:
;** Descriptions:
;**
;********************************************************************************************************/
;define the stack size
;定义堆栈的大小
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
;定义处理器模式,用户/管理/系统/中断
USR32Mode EQU 0x10
SVC32Mode EQU 0x13
SYS32Mode EQU 0x1f
IRQ32Mode EQU 0x12
FIQ32Mode EQU 0x11
PINSEL2 EQU 0xE002C014//定义PINSEL2地址,这个地址的值一般用户不需要改变,和芯片的加密有关
//更改后有可能使得JTAG调试失效,进入芯片加密状态.
BCFG0 EQU 0xFFE00000
BCFG1 EQU 0xFFE00004
BCFG2 EQU 0xFFE00008
BCFG3 EQU 0xFFE0000C//定义存储器组配置寄存器
BCFG_16DEF EQU 0x10000400 ;// 16Bit Bus
BCFG_CS3 EQU (BCFG_16DEF | (0x01<<00) | (0x07<<05) | (0x07<<11)) ;// 分别是IDCY/WST1/WST2对应读写速率等
;//从第0位开始对其写入0001，
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本文关键字：源代码 源码-程序，单片机-工控设备 - 源码-程序
