delay.asm

通过程序实现N个时钟的延时

;延时子程序  delay.asm
;===============================================
		.global  _ms_delay ,us_delay,t_delay1,t_delay2
_ms_delay: 
	pshm	ar3
	pshm	ar4
	stlm	a,ar3
loop:
	stm 	#11c6h,ar4		;1ms=4(cycles)x5000x0.05us   
ms_loop:
	banz 	ms_loop,*ar4-
	banz 	loop,*ar3-
	nop
	popm	ar4
	popm	ar3
	ret
;===============================================	
us_delay: 
	stm 	#4h,ar4			;1us=4(cycles)x5x0.05us   
us_loop:
    NOP					
	banz 	us_loop,*ar4-  
	nop					

	banz 	us_delay,*ar3- 
	nop
	ret					

;===============================================
t_delay1:
		nop
		nop
		nop
		nop
		nop
		
		nop
		nop
		ret
t_delay2:
		nop
		nop
		ret
;===============================================