📄 startup.s
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;/****************************************Copyright (c)***************************************************
** Guangzhou ZHIYUAN electronics Co.,LTD.
**
** http://www.embedtools.com
;**
;**--------------File Info--------------------------------------------------------------------------------
;** File name: Startup.s
;** Last modified Date:
;** Last Version:
;** 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: LinEnqiang
;** Modified date: 2008-01-15
;** Version: 1.05
;** Descriptions: 增加中断管理支持、中断服务函数不必使用 Handler
;**
;********************************************************************************************************/
INCLUDE LPC2200.INC ;/* 引入头文件 */
;/* 定义堆栈的大小 */
SVC_STACK_LEGTH EQU 0
FIQ_STACK_LEGTH EQU 10
IRQ_STACK_LEGTH EQU 9 * 8 ;/* 每层嵌套需要9个字堆栈，允许*/
;/* 8嵌套层 */
ABT_STACK_LEGTH EQU 0
UND_STACK_LEGTH EQU 0
NoInt EQU 0x80 ;/* 禁止 IRQ 中断宏定义 */
NoFIQ EQU 0x40 ;/* 禁止 FIQ 中断宏定义 */
USR32Mode EQU 0x10 ;/* 用户模式宏定义 */
SVC32Mode EQU 0x13 ;/* 管理模式宏定义 */
SYS32Mode EQU 0x1f ;/* 系统模式宏定义 */
IRQ32Mode EQU 0x12 ;/* IRQ模式宏定义 */
FIQ32Mode EQU 0x11 ;/* FIQ模式宏定义 */
;/********************************************************************************************************
; The imported labels
; 引入的外部标号在这声明
;********************************************************************************************************/
IMPORT __main ;/* C语言主程序入口 */
IMPORT RunFirst ;/* vic初始化 */
IMPORT vicControl ;/* vic管理软中断入口 */
IMPORT FIQ_Exception ;/* 快速中断异常处理程序 */
IMPORT TargetResetInit ;/* 目标板基本初始化 */
IMPORT SoftwareInterrupt ;/* uC/OSII软中断处理入口 */
IMPORT __use_two_region_memory
IMPORT __use_no_semihosting_swi
;/********************************************************************************************************
; The emported labels
; 给外部使用的标号在这声明
;********************************************************************************************************/
EXPORT Reset
EXPORT StackUsr
EXPORT InitStack
EXPORT bottom_of_heap
EXPORT SoftwareInterruptAdd
EXPORT __user_initial_stackheap
CODE32
AREA vectors,CODE,READONLY
ENTRY
Reset ;/* 中断向量表 */
LDR PC, ResetAddr
LDR PC, UndefinedAddrA
LDR PC, SWI_Addr
LDR PC, PrefetchAddrA
LDR PC, DataAbortAddrA
DCD 0xB8A06F58
LDR PC, IRQ_Addr
LDR PC, FIQ_Addr
ResetAddr DCD ResetInit
UndefinedAddrA DCD Undefined
SWI_Addr DCD SoftwareInterruptAdd
PrefetchAddrA DCD PrefetchAbort
DataAbortAddrA DCD DataAbort
Nouse DCD 0
IRQ_Addr DCD IRQ_Handler
FIQ_Addr DCD FIQ_Handler
Undefined
B .
PrefetchAbort
B .
DataAbort
B .
;/*********************************************************************************************************
;** Function name: IRQ_Handler
;** Descriptions: 中断处理for uC/OSII
;** input parameters: none
;** output parameters: none
;** Returned value: none
;**-------------------------------------------------------------------------------------------------------
;** Modified by:
;** Modified date:
;**-------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
MACRO
ISR
LDR R2, =VICVectAddr
LDR R3, [R2]
ADD LR, PC, #1
BX R3
CODE16
BX PC
NOP
CODE32
MEND
INCLUDE irq.inc
IRQ_Handler HANDLER
;/*********************************************************************************************************
;** Function name: SoftwareInterruptAdd
;** Descriptions: 软中断处理
;** input parameters: none
;** output parameters: none
;** Returned value: none
;**-------------------------------------------------------------------------------------------------------
;** Modified by:
;** Modified date:
;**-------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
SoftwareInterruptAdd
CMP R0, #0x100
BLO SoftwareInterrupt
B vicControl
;/*********************************************************************************************************
;** Function name: FIQ_Handler
;** Descriptions: FIQ中断处理
;** input parameters: none
;** output parameters: none
;** Returned value: none
;**-------------------------------------------------------------------------------------------------------
;** Modified by:
;** Modified date:
;**-------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
FIQ_Handler
STMFD SP!, {R0-R3, LR}
LDR R2, =FIQ_Exception+1
ADD LR, PC, #1
BX R2
CODE16
BX PC
NOP
CODE32
LDMFD SP!, {R0-R3, LR}
SUBS PC, LR, #4
;/********************************************************************************************************
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