boot.s

ARM9WindowsOS下电机控制 蜂鸣控制 需要高度自治的试验平台

	IMPORT	postDelay

	IMPORT	post_initGpio
	IMPORT	dummyOs

         IMPORT  stack_SVC
         IMPORT  stack_IRQ
         IMPORT  init_Memory
  
         IMPORT  RTSR  
         IMPORT  ICMR
         IMPORT  PSSR
         IMPORT  init_ICMR
         IMPORT  handle_IRQ
         IMPORT  IRQHandler



      AREA boot ,CODE ,READONLY

	ENTRY

	b post
	nop
	nop
	nop

;0x10
	nop
	nop
	b IRQHandler
	nop

;0x20
	nop
	nop
	nop
	nop

;0x30
	nop
	nop
	nop
	nop

;0x40
	nop
	nop
	nop
	nop

;0x50
	nop
	nop
	nop
	nop

;0x60
	nop
	nop
	nop
	nop

;0x70
	nop
	nop
	nop
	nop

;/////////
;this post routine body
;////////

post

	mov r14,pc
         ldr pc,=init_Memory

         ldr r11, =stack_SVC
         mov r13, r11

         mov r14, pc
         ldr pc, =post_initGpio


         ;modify the sp_IRQ  
         mrs r1,cpsr
         and r1,r1,#0xe0
         orr r1,r1,#0x12
         msr cpsr_c,r1  
         
         ldr r11, =stack_IRQ
         mov r13,r11

         mrs r1,cpsr
         and r1,r1,#0xe0
         orr r1,r1,#0x13
         msr cpsr_c,r1

       

         mrs  r1, CPSR
         and  r1, r1,#0x3f
         msr  CPSR_c, r1

         ldr  r1, =ICMR
         ldr  r2, =init_ICMR
         str  r2,[r1]

         ldr  r1, =PSSR
         mov r2, #0x30
         str  r2, [r1]



    	MOV          R0,#0xa000000      ;turn on the light of board

    	LDR           R2,=0xCFFF

    	STRH          R2,[R0,#0]

;//////////////////

	
	ldr pc,=dummyOs
	END