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Date: Tue, 31 Jan 2012 17:45:29 +0100
From: wolf_dl4yhf <dl4yhf@freenet.de>
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In-Reply-To: <4F280D54.4090701@iup.uni-heidelberg.de>
Subject: Re: LF: WOLF Monkey Business
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Hi Stefan,


> So the question is if i can use the WOLF gui program to get what i 
> want? Some things can be changed in the config file but don't know how 
> i can get the RS232 to generate the toggle signal for the phase shift :-/
>

Simple: You cannot drive the RS-232 with the WOLF user interface. 
Producing a precisely timed digital signal which isn't (by coincidence) 
a multiple of the serial port's baudrate is almost impossible with 
windoze. Reason: Windows uses buffering between the application and the 
ports hardware. Sending a byte to the serial port API doesn't mean it is 
placed in the UART's transmit shift register. It may get there in a 
microsecond, or in a millisecond, or even dozens of milliseconds later. 
Thus the RS-232 port can only be used for RX/TX switching, but not for 
the digital modulation itself (at least not without an extra hardware; 
PIC etc etc).

Cheers,
   Wolf .


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    Hi Stefan,<br>
    <br>
    <br>
    <blockquote cite="mid:4F280D54.4090701@iup.uni-heidelberg.de"
      type="cite">
      <p><font color="#cc0000"><font color="#330033">
            So the question is if i can use the WOLF gui program to get
            what i
            want? Some things can be changed in the config file but
            don't know how
            i can get the RS232 to generate the toggle signal for the
            phase shift
            :-/<br>
          </font></font></p>
    </blockquote>
    <br>
    Simple: You cannot drive the RS-232 with the WOLF user interface.
    Producing a precisely timed digital signal which isn't (by
    coincidence) a multiple of the serial port's baudrate is almost
    impossible with windoze. Reason: Windows uses buffering between the
    application and the ports hardware. Sending a byte to the serial
    port API doesn't mean it is placed in the UART's transmit shift
    register. It may get there in a microsecond, or in a millisecond, or
    even dozens of milliseconds later. Thus the RS-232 port can only be
    used for RX/TX switching, but not for the digital modulation itself
    (at least not without an extra hardware; PIC etc etc).<br>
    <br>
    Cheers,<br>
    &nbsp; Wolf .<br>
    <br>
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