595led简单版.txt

74HC595 的LED 程序

MAIN:MOV R7,#8
MOV A,#10101010b

XS:RLC A
MOV P1.0,C
CLR P1.1
SETB P1.1
DJNZ R7,XS
CLR P1.2
SETB P1.2
LCALL DELAY
SJMP MAIN
DELAY:  MOV  R5,#5
DEL0:   MOV  R6,#64
DEL1:   MOV  R7,#128
             DJNZ  R7,$
             DJNZ  R6,DEL1
             DJNZ  R5,DEL0
             RET
			 END