delay.asm

DSP实验开发程序:信号发生器.学习使用CCS

***延迟程序
	.global _delay
	.global _delaytime
	.title  "delay.asm"
	.include "regsave.asm"
	.mmregs
	.sect   "delay"

_delay				
	reg_save
	stm  #_delaytime,ar7
delay1	
		ld   *ar7,b
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		nop
		sub  #1,b
		stl  b,*ar7
		bc delay1,bgt
	reg_restore
	ret
	.end