exp01.asm

这是学习DSP的一些常用子实例

;File Name:exp01.asm

	.mmregs
	.global _main
_main: 
	nop
	nop
	stm		#100h,sp
	andm    #0fffbh,pmst
    stm     #0b, clkmd;switch to DIV mode clkout= 1/2 clkin
statu:
    ldm      clkmd, A
    and      #01b, A ;poll STATUS bit
    bc       statu, ANEQ
    stm      #0f007h, clkmd ;switch to PLL X 1 mode
	nop
	nop
loop:	
	ssbx	xf
	call 	delay
	rsbx	xf
	call 	delay
	
	b 		loop 
	nop
	nop            
	
delay: 
	stm 	#170fh,ar3
loop1:              
	stm 	#0f9h,ar4
loop2:
	banz 	loop2,*ar4-
	banz 	loop1,*ar3-
	ret
	nop
	nop
   .end