9.2.1精确延时.txt

来自「c51单片机中的汇编子程序」· 文本 代码 · 共 31 行

TIM96:
HSOTIME 	EQU 04H 				
HSOCMD 	EQU 06H
INTMSK 		EQU 08H
TIME1  		EQU 0AH
CSEG 		AT  200AH
DCW  		INTV				
CSEG 		AT 2080H				
LDB 		48H,#N				
LD  			SP,#100H
LDB 		HSOCMD,#1BH			
ADD 		HSOTIME,TIME1,3TCC	
LDB 		INTMSK,#20H			
EI							
HERE:
SJMP 		HERE				
INTV:
PUSHF
LDB  		HSOCMD,#1BH			
DJNZ 		48H,CCOM			
ADD  		HSOTIME,TIME1, #TCC	
LDB  		48H,#N			
BR   		GOON				
CCOM:
LD 			HSOTIME,TIME1		
POPF
RET								
GOON:							
POPF
RET