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FPGA_FR's avatar
FPGA_FR
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3 years ago
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Beginners question in multiple assignments to output

Hi everyone, I would be interested in assigning two wire variables to a single output pin and obtain as an output signal the summation of the two signals. A trivial example would be to use the c...
  • ak6dn's avatar
    ak6dn
    3 years ago

    What you seem to be asking for is analog logic, summing the levels on two wires to produce an output signal that can have three discrete levels.

    IE: (0,1) + (0,1) = (0,1,2)

    This is not possible in digital logic FPGAs.

    At best you could two outputs and resistors to simulate a simple digital to analog converter, much like some development boards support an analog VGA signal using an array of resistor values R-2R-4R-8R etc to make a simple D to A.

    Can't be done internal to a device however. Not with any current Altera FPGA parts AFAIK.

SyafieqS's avatar
SyafieqS
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3 years ago

Hi FPGA_FR,

May I know if there is any update from previous reply?

  • FPGA_FR's avatar
    FPGA_FR
    Icon for New Contributor rankNew Contributor
    3 years ago

    Dear SyafieqS,

    I have received an answer from ak6dn, which is ok with me and make sense.
    Also, would it possible as a moderator that you are not using my first name from my account information but my username FPGA_FR in public post ? Is it possible to edit that out from your previous message ?

    Thank you very much for your understanding on this matter.
    Thank you all for your help on this forum.

    Very much appreciated


    Best wishes,