startup.s

周立功2103开发板CD资料

;/****************************************Copyright (c)**************************************************
;**                               Guangzhou ZHIYUAN electronics Co.,LTD.
;**                                 http://www.zyinside.com
;**
;**--------------File Info-------------------------------------------------------------------------------
;** File name:          Startup.s
;** Last modified Date: 2006-02-22
;** 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:           2005-11-22
;** Version:                1.0
;** Descriptions:       The original version
;**
;**------------------------------------------------------------------------------------------------------
;** Modified by:        
;** Modified date:
;** Version:    
;** Descriptions: 
;**
;********************************************************************************************************/
RAM_SIZE            EQU     0x2000
IRQ_STAXK_SIZE      EQU     0

StackIRQ            EQU     (RAM_SIZE + 0X40000000)
StackUsr            EQU     (StackIRQ - IRQ_STAXK_SIZE * 4)


            INCLUDE     LPC2294.INC         ; Include the head file 引入头文件

NoInt       EQU 0x80
NoFIQ       EQU 0x40

UND32Mode   EQU 0x1b
USR32Mode   EQU 0x10
SVC32Mode   EQU 0x13
SYS32Mode   EQU 0x1f
IRQ32Mode   EQU 0x12
FIQ32Mode   EQU 0x11
TMode       EQU 0x20

;The exported labels
;给外部使用的标号在这声明



    
    EXPORT  Reset

    CODE32

    AREA    vectors,CODE,READONLY
        ENTRY
;interrupt vectors
;中断向量表
Reset
        LDR     PC, Reset_1
Reset_1 DCD     ResetInit
        B       .
        B       .
        B       .
		DCD     -(0xe51ff004 + 0xe321f0d2 + 0xeafffffe + 0xeafffffe +0xeafffffe + 0xe51ffff0 + 0xe25ef004)
        LDR     PC, [PC, #-0xff0]
        SUBS    PC, LR, #4

;********************************************************************************************************/
ResetInit
        MSR     CPSR_c, #(IRQ32Mode | NoInt | NoFIQ)
        LDR     SP, ResetInitData

        MSR     CPSR_c, #(SYS32Mode | NoInt | NoFIQ)
        LDR     SP, ResetInitData+4

		LDR		R0, VICVectAddrData
		MOV		R1, #0x00
		STR		R1, [R0]

        LDR     R1, ResetInitData+8
        BX      R1
ResetInitData
        DCD     StackIRQ
        DCD     StackUsr
        DCD     Main
        
VICVectAddrData
		DCD		VICVectAddr

;********************************************************************************************************/
IO1		EQU		(1 << 6)			;测试的第一个引脚是P0.6，低速GPIO
IO2		EQU		(1 << 8)			;测试的第二个引脚是P0.8，高速GPIO
;/*********************************************************************************************************
;** 函数名称: 	Main
;** 功能描述: 	比较高速GPIO与低速GPIO的区别。
;********************************************************************************************************/
    code32
Main
;add usr code
 		LDR		R0, =MAMTIM		;存储器加速模块使能
		MOV		R1, #3
		STR		R1, [R0]
		
		LDR		R0, =MAMCR
		MOV		R1, #2
		STR		R1, [R0]
		
		LDR		R0, =VPBDIV		;PCLK = CCLK
		MOV		R1, #1
		STR		R1, [R0]
		
LOOP	LDR		R0, =SCS		;先使用低速GPIO
		MOV		R1, #0
		STR		R1, [R0]	
		
		LDR		R0, =IO0DIR		;设置为输出模式
		LDR		R1, =IO1
		STR		R1, [R0]
		
		LDR		R2, =IO0SET
		LDR		R3, =IO0CLR
		
		STR		R1, [R2]		;输出高电平
		STR		R1, [R3]		;输出低电平
		STR		R1, [R2]		;输出高电平
		STR		R1, [R3]		;输出低电平
		
		LDR		R0, =SCS		;先使用高速GPIO
		MOV		R1, #1
		STR		R1, [R0]	
		
		LDR		R0, =FIO0DIR	;设置为输出模式
		LDR		R1, =IO2
		STR		R1, [R0]
		
		LDR		R2, =FIO0SET
		LDR		R3, =FIO0CLR
		
		STR		R1, [R2]		;输出高电平
		STR		R1, [R3]		;输出低电平
		STR		R1, [R2]		;输出高电平
		STR		R1, [R3]		;输出低电平		
		
		B		LOOP


;********************************************************************************************************/
    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       

    END
;/*********************************************************************************************************
;**                            End Of File
;********************************************************************************************************/