LOOP:MOV R0,#8
MOV R3,#00H
L: MOV A,R3
MOVC A,@A+DPTR
LCALL SendOneByte ;add your code here!
INC R3
DJNZ R0,L
LJMP LOOP
InitUART:;初始化串口；波特率9600；定時器1；方式2；
MOV TMOD,#20H
MOV SCON,#50H
MOV TH1,#0FDH
MOV TL1,TH1
MOV PCON,#00H
SETB EA
SETB ES
SETB TR1
RET
UARTInterrupt:
JB RI,IsUART_Receive;查接收標志是接收？發送？為1表示是接收中斷相應的，反之為發送，因為無論發收都會觸發中斷
CLR TI ;為0，表示不是接收中斷，兒時發完了
RETI
IsUART_Receive: ;接收數據
CLR RI
PUSH ACC
MOV A,SBUF
;========================
MOV P0,A
;========================
POP ACC
RETI
SendOneByte: ;發送數據
CLR ES
CLR TI
MOV SBUF,A
WaitSendFinish:
JNB TI,WaitSendFinish
CLR TI
SETB ES
RET
TAB:DB 30H,31H,32H,33H,34H,35H,36H,37H,38H
END
上位機：Private Sub Command1_Click()
Dim aa$
MSComm1.Output = Text2.Text
aa = MSComm1.Input
Text1.Text = aa
End Sub
Private Sub Command2_Click()
Text1.Text = ""
Text2.Text = ""
End Sub
Private Sub Command3_Click()
End
End Sub
Private Sub Form_Load()
MSComm1.CommPort = 7
MSComm1.PortOpen = True
End Sub