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read from serial port

Discussion in 'Assembly Language Programming (ALP) Forum' started by helz15, Mar 24, 2008.

  1. helz15

    helz15 New Member

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    Hi,

    I am new to this site, but i am looking for help in using assembly language to read from the serial port.
    To write the program i am using Raisionance (Ride) software, i have pretty basic knowledge of assembly language but am hoping to crack this anyway.

    So far i have got:

    MOV SCON,#50H
    MOV TMOD,#20H
    MOV TH1,#253
    SETB TR1

    SLOOP: JNB RI,$
    MOV A,SBUF
    CLR RI
    CLR TI
    MOV SBUF,A
    JNB TI,$
    SJMP SLOOP

    The problem occurs when it gets to JNB TI,$, it all seems to stop.
    I am using this to read data from one of those mulitmeters that plug into the serial port, it did come with its own software, but i am not using that.

    Please Help! Thanks!
     

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