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SERIAL COMMUNICATION PROBLEM

LA p

this is my code for serial communication using 8051
iam trying to send letter B on serial port
but iam not getting any thig on heperterminal though all setting are ok .so not getting what the problem is.

 ORG 000H

     MOV  TMOD,#20H
     MOV  TH1,#0FAH

     MOV  SCON,#50H
     SETB TR1
     MOV  A,#'B'
     ACALL DELAY
A_1:
     MOV  SBUF,A
H_1: JNB  TI, H_1
     CLR  TI
     SJMP A_1
DELAY:

         MOV R0,#255
   L1:  DJNZ R0,L1
        MOV R1,#255
L2:     DJNZ R1,L2
        RET
        end

Parents
  • 0 in reply to Eric Best

    No, baud contra bits/s shouldn't consider bits including/excluding start/stop bits. It is the number of symbol transitions per second, so it might be the same as bits/s, but for example high-speed modems transfers more than one bit in each symbol by using phase and amplitude, i.e. bits/second is higher than your baud measure.

    That is why I claimed that definitions equalizing bits/s and baud are wrong.

Reply
  • 0 in reply to Eric Best

    No, baud contra bits/s shouldn't consider bits including/excluding start/stop bits. It is the number of symbol transitions per second, so it might be the same as bits/s, but for example high-speed modems transfers more than one bit in each symbol by using phase and amplitude, i.e. bits/second is higher than your baud measure.

    That is why I claimed that definitions equalizing bits/s and baud are wrong.

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