設(shè)計(jì)一個(gè)串行通信系統(tǒng)，實(shí)現(xiàn)A單片機(jī)上的按鍵控制B單片機(jī)上的流水燈顯示，在A單片機(jī)上有4個(gè)按鍵，分別控制B單片機(jī)上的8個(gè)LED燈實(shí)現(xiàn)4中不同的顯示效果

發(fā)送：

ORG 0

AJMP MAIN

ORG 100H

MAIN:MOVSP,#59H

MOV TMOD,#20

MOV TH1,#0E6H

MOV TL1,#0E6H

SETB TR1

MOV SCON,#50H

KEYT:JNBP1.0,KY0

JNB P1.1,KY1

JNB P1.2,KY2

JNB P1.3,KY3

SJMP KEYT

KY0:MOVA,#01H

ACALL DELAY

RL A

ACALL FASONG

SJMP KEYT

KY1:MOVR2,#5

LOOP:MOVA,#0FFH

ACALL DELAY

DJNZ R2,LOOP

ACALL FASONG

SJMP KEYT

KY2:MOVR0,#5

LOOP1:MOVA,#11H

ACALL DELAY

CPL A

DJNZ R0,LOOP1

ACALL FASONG

SJMP KEYT

KY3:MOVA,#0

ACALL FASONG

SJMP KEYT

FASONG:MOVSBUF,A

WAIT:   JBC TI,KEYT

SJMP WAIT

DELAY:MOVR7,#50

Y1: MOV R6,#20

Y2:MOV R5,#250

Y3:NOP

NOP

DJNZ R5,Y3

DJNZ R6,Y2

DJNZ R7,Y1

RET

END

接收：

ORG  0

AJMP MAIN

ORG 100H

MAIN:MOVSP,#59h

MOV TMOD,#20H

MOV TH1,#0E6H

MOV TL1,#0E6H

SETB TR1

MOV SCON,#50H

JIESHOU:JBC RI,XIANSHI

SJMP JIESHOU

XIANSHI:MOVA,SBUF

MOV P1,A

SJMP JIESHOU

END