MUX?

Discussion in 'Homework Help' started by jokester4u, Mar 29, 2013.

  1. jokester4u

    Thread Starter New Member

    Nov 3, 2012
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    WARNING:DesignEntry:216 - Net "DESTINATION_A" is connected to load pins and/or
    I/O markers, but not connected to any source pin or I/O marker.
    WARNING:DesignEntry:216 - Net "DESTINATION_B" is connected to load pins and/or
    I/O markers, but not connected to any source pin or I/O marker.
    WARNING:DesignEntry:216 - Net "DESTINATION_C" is connected to load pins and/or
    I/O markers, but not connected to any source pin or I/O marker.
    WARNING:DesignEntry:216 - Net "DESTINATION_D" is connected to load pins and/or
    I/O markers, but not connected to any source pin or I/O marker.
    WARNING:DesignEntry:206 - Net "XLXN_56" must be connected to a symbol pin or an
    I/O marker.
    WARNING:Xst:1780 - Signal <XLXN_56> is never used or assigned. This unconnected signal will be trimmed during the optimization process.
    WARNING:Xst:653 - Signal <DESTINATION_D_DUMMY> is used but never assigned. This sourceless signal will be automatically connected to value 0.
    WARNING:Xst:653 - Signal <DESTINATION_C_DUMMY> is used but never assigned. This sourceless signal will be automatically connected to value 0.
    WARNING:Xst:653 - Signal <DESTINATION_B_DUMMY> is used but never assigned. This sourceless signal will be automatically connected to value 0.
    WARNING:Xst:653 - Signal <DESTINATION_A_DUMMY> is used but never assigned. This sourceless signal will be automatically connected to value 0.
    WARNING:Cpld - Unable to retrieve the path to the iSE Project Repository. Will
    use the default filename of 'LABB2.ise'.
    WARNING:Cpld:1007 - Removing unused input(s) 'S00'. The input(s) are unused
    after optimization. Please verify functionality via simulation.
    WARNING:Cpld:1007 - Removing unused input(s) 'S11'. The input(s) are unused
    after optimization. Please verify functionality via simulation.
    WARNING:Cpld:1007 - Removing unused input(s) 'Voltage_B'. The input(s) are
    unused after optimization. Please verify functionality via simulation.
     
  2. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    These are just errors. Next time, please write a little something first, explaining what you are trying to do.

    It looks like you are using Xilinx ISE and are trying to use the visual programming interface, is that right? Does it create some sort of HDL that you can post, as that would be best. Otherwise, it would appear that you need to connect XLXN_56 and XLXN_55 together. That red box typically means that a pin had yet to be connected. It looks like you tried, but it didn't connect them...

    Another reason it may not have connected them, or not allow you to connect them is that you used a multiplexer for both. You will need a multiplexer and a demultiplexer, as they would have their inputs and outputs defined differently.
     
  3. jokester4u

    Thread Starter New Member

    Nov 3, 2012
    26
    0
    Yes you are right !!! they cant be connected

    In xilinx there is only multiplexer we have to give the inputs and outputs to the pins
     
  4. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    I'm not at my computer, so I can't check this, but are you able to redefine pins? Perhaps through the object's properties....

    Do you have decoders available?

    You may nee to make a demultiplexer...
     
  5. jokester4u

    Thread Starter New Member

    Nov 3, 2012
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    0
    yes i have the decoder in the software but how do i make a demultiplexer.
     
  6. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
  7. jokester4u

    Thread Starter New Member

    Nov 3, 2012
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    all i have 2 to 4 decoder
    i dont have 1 to 2 decoder
     
  8. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    The idea is expandable. The author chose a 1 to 2 for simplicity. Think about what the decoderoutputs are doing in a demultiplexer.
     
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