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

;********************************************************************************************************/
;********************************************************************************************************/
;函数名称：Main
;函数功能：测试内部SRAM的回写缓冲区。第一次上电复位后，蜂鸣器不会鸣叫，手动复位后，蜂鸣器会鸣叫。
;说明：跳线JP9短接。
;********************************************************************************************************/

TEST_RAM	EQU	0x40000100		;测试RAM的地址
BEEP_CON	EQU	1<<7

	CODE32	  
Main
;add usr code
	LDR		R0,=PINSEL0			;P0.7引脚为GPIO
	MOV		R1,#0x00
	STR		R1,[R0]
	LDR		R0,=IO0DIR
	LDR		R1,=BEEP_CON		;P0.7为输出模式
	STR		R1,[R0]
	LDR		R0,=IO0SET			;蜂鸣器停止鸣叫
	STR		R1,[R0]
	
	
	LDR		R0,=TEST_RAM		;比较0x40001000处的数据是否为0x44444444
	LDR		R2,[R0]
	LDR		R3,=0x33333333
	CMP		R2,R3
	
	LDR		R4,=IO0CLR
	LDR		R1,=BEEP_CON
	STREQ	R1,[R4]				;如果0x40001000处的数据为0x33333333，则蜂鸣器鸣叫
		
	LDR		R1,=0x11111111		;第一次向0x40001000处写入0x11111111
	STR		R1,[R0]
	LDR		R1,=0x22222222		;第二次向0x40001000处写入0x22222222
	STR		R1,[R0]
	LDR		R1,=0x33333333		;第三次向0x40001000处写入0x33333333
	STR		R1,[R0]
	LDR		R1,=0x44444444		;第四次向0x40001000处写入0x44444444
	STR		R1,[R0]	

	
;	LDR		R0,=0x40000000		;如果再执行一次对RAM的写操作，便会确保0x44444444写入到0x40001000处。
;	STR		R0,[R0]	
LOOP
	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
;********************************************************************************************************/