******************************************************************
*該程序完成BOOTLOADER在線擦寫FLASH的功能。                       *
*實驗現(xiàn)象是帶仿真器時，藍色XF燈閃爍。當拔掉仿真器下載電纜線后，按*
*復位鍵或重新上電，XF燈閃爍。                                    *
******************************************************************


	.mmregs
	.global	_main
	.text
dm1:	ssbx	xf
    	call 	delay
    	rsbx	xf
	call 	delay
	b dm1

delay: 
	stm 	#1400h,ar6
loop1:              
	stm 	#0f9h,ar7
loop2:
	banz 	loop2,*ar7-
	banz 	loop1,*ar6-
	ret
	nop
	nop
	.word 0000h  ；代碼結(jié)束標記0000H

_main:	;STM #0,CLKMD
clkcon: stm #2000h,sp
        stm 5000h,ar5
        STM #0x7FFF,SWWSR
        stm #00ffh,*ar5
        nop
;;;;;flash clear chip Erase
_FLASH STM #0XD555,AR0
       STM #0XAAAA,AR1
	   nop
	   nop
	ST #00aaH,*AR0
	ST #0055H,*AR1
	st #0080h,*ar0
	ST #00aaH,*AR0
        ST #0055H,*AR1
	ST #0010H,*AR0
hhhh    call delay
yyyy    nop
        stm #0ffffh,ar5;;
        ST #00aaH,*AR0
	ST #0055H,*AR1
	st #00a0h,*ar0
	st #0000h,*ar5
	call xys
	stm #0fffeh,ar5;;
        ST #00aaH,*AR0
	ST #0055H,*AR1
	st #00a0h,*ar0
	st #0080h,*ar5
	call xys
	nop
	nop
    stm #8000h,ar5
   
    stm #dm,ar2;;xie nei rong
    stm #7,ar3;;;;xie zi shu
    call lpp;;;;xie
    
    stm #dm1,ar2;;;;xie nei rong
    stm #19,ar3;;;xie zi shu
    call lpp;;;;xie
    nop
    nop
    b dm1
lpp: ld *ar2+,0,a
     ld a,-8,b
     and #00ffh,b
;;;;;;;;;;;;;;;;;;;;
     ST #00aaH,*AR0
     ST #0055H,*AR1
     st #00a0h,*ar0
     
     stl b,*ar5+
     call xys
;;;;;;;;;;;;;;;;;
     and #00ffh,a
     ST #00aaH,*AR0
     ST #0055H,*AR1
     st #00a0h,*ar0
     
     stl a,*ar5+
     call xys
     banz lpp,*ar3-
     ret
     nop
     nop
dm 
  .word 08aah,7fffh,0f800h,0000h,0080h,0013h,0000h,0080h
 
xys: 
	stm 	20h,ar6
lop1:              
	stm 	0f9h,ar7
lop2:
	banz 	lop2,*ar7-
	banz 	lop1,*ar6-
	ret
    .end