使一个 LED灯闪烁的汇编程序
P4M1 DATA 0B3H
P4M0 DATA 0B4H
P4 DATA 0C0H
ORG 0000H
LJMP F_Main
ORG 0100H
F_Main:
MOV SP, #05FH
MOV P4M0,#02H
MOV P4M1,#0FDH
L_MainLoop:
CPL P4.1
LCALL DELAY
SJMP L_MainLoop
DELAY: MOV R5,#20
D1: MOV R6,#200
D2: MOV R7,#248
DJNZ R7,$
DJNZ R6,D2
DJNZ R5,D1
RET
END