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ORG 00H ;--------------------------- SETUP: MOV P0,#00H BUTTON: JNB P1.0,THUAN JNB P1.1,NGUOC JMP BUTTON ;--------------------------- THUAN: JNB P1.0,$ MOV A,#00000001B MOV R0,#8 L1: JNB P1.1,NGUOC MOV P0,A CALL DELAY RL A DJNZ R0,L1 MOV R0,#0 JMP THUAN ;--------------------------- NGUOC: JNB P1.1,$ MOV A,#10000000B MOV R1,#8 L2: JNB P1.0,THUAN MOV P0,A CALL DELAY RR A DJNZ R1,L2 MOV R1,#0 JMP NGUOC ;--------------------------- DELAY: MOV TMOD,#01H MOV R2,#10 LAP: JNB P1.1,NGUOC JNB P1.0,THUAN MOV TH0,#HIGH(-50000) MOV TL0,#LOW(-50000) SETB TR0 JNB TF0,$ CLR TR0 CLR TF0 DJNZ R2,LAP RET END