89c51 匯編 串口發(fā)送數(shù)據(jù)

START:

MOV SCON,#50H //設(shè)置串口方式1，允許接受

MOV TMOD,#20H

MOV TH1, #0F3H //波特率為2400B/s

MOV TL1, #0F3H

SETB TR1
SEND:

MOV A, #41H

MOV P1, A //顯示要發(fā)送的數(shù)據(jù)
MOV SBUF,A

WAIT:

JBC TI, SEND
JMP WAIT

END