8802080913:
;***************************************;所有的燈逐漸從暗到全亮,再由全亮到暗;***************************************ORG0000HSTART:MOVR0,#01H ;延時(shí)次數(shù)置初值MOVR1,#00HMOVR2,#00000000B;燈控制字置初值MOVR3,#11111111BLOOP:MOVP0,R2;從暗到亮?xí)r輸出"0",亮燈;從亮到暗時(shí)輸出"1",滅燈MOVA,R0;延時(shí)次數(shù)暫存于ALOOP1:MOVR4,#10;延時(shí)DJNZR4,$DJNZR0,LOOP1INCA ;延時(shí)次數(shù)遞增MOVR0,AMOVP0,R3;從暗到亮?xí)r輸出"1",滅燈;從亮到暗時(shí)輸出"0",亮燈MOVA,R1;延時(shí)次數(shù)暫存于ALOOP2:MOVR4,#10;延時(shí)DJNZR4,$DJNZR1,LOOP2DECA ;延時(shí)次數(shù)遞減MOVR1,AJNZRTN ;達(dá)到最亮或最暗時(shí),反轉(zhuǎn)燈控制字MOVA,R2CPLAMOVR2,AMOVA,R3CPLAMOVR3,ARTN:SJMPLOOPEND