甲机发送.asm

两个单片机串行通行程序

ORG 0000H
LJMP START
START:
     MOV SCON,#80H
     MOV PCON,#00H
MAIN:MOV A,P0
     ORL A,#0C0H
     CJNE A,#0FFH,TS
     LJMP MAIN
  TS:ACALL TXD
     LJMP MAIN 
TXD: MOV C,P
     MOV TB8,C
     MOV SBUF,A
     JNB TI,$
     CLR TI
     RET