ĐIỀU KHIỂN LED ĐƠN
;******************************
;CHUONG TRINH DIEU KHIEN 8 ;LED SANG TAT
;******************************
;KETNOI:8LED>PORT(CODEMDAO).
;******************************
ORG 00H
CHOPTAT:
MOV P0,#00H ;LED TAT
LCALL DELAY500MS
MOV P0,#0FFH ;LED SANG
LCALL DELAY500MS
SJMP CHOPTAT ;QUAY LAI
;***************************
DELAY500MS: ;CHUONG TRINH CON TAO THOI GIAN TRE 500MS
PUSH 00H
MOV R0,#100
MOV TMOD,#01H
LOOP:
MOV TH0,#HIGH(-5000)
MOV TL0,#LOW(-5000)
SETB TR0
JNB TF0,$
CLR TR0
CLR TF0
DJNZ R0,LOOP
POP 00H
RET
END
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