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Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

Decimal Point on Seven Segment Display for DE2-115

Hi everyone,

On the DE2-115 development board's 8 7-segment-displays, there are decimal points. There are, however, no FPGA pin numbers to access these decimal points--at least I can't find them when looking at pages 37-39 of the DE2_115_User_manual.pdf

Does anyone using this board know if it is possible to turn the decimal points on the seven-segment-displays on and off?

Thanks very much,

Nate

4 Replies

  • FvM's avatar
    FvM
    Icon for Super Contributor rankSuper Contributor
    9 months ago

    @Tirdad: DE2-115 schematic clarifies the question. Anodes are tied to 2V5 supply. Blanking the display can be done by logic in segment outputs.

    @Nicholas66: The question was answered 9 years ago. DP is unconnected on this dev board.



  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    9 years ago

    The decimal points aren't connected on the DE2-115 board. You should be able to find cheap 7 segment displays on ebay or amazon that have a decimal point.

    • Tirdad's avatar
      Tirdad
      Icon for New Contributor rankNew Contributor
      9 months ago
      Hello,
      What about the common anodes? Are any pins connected to the anode?
      I want to control the seven-segment display (turn it on and off), but I can't seem to find the pin assignments.
  • Nicholas66's avatar
    Nicholas66
    Icon for New Contributor rankNew Contributor
    9 months ago

    To enable the decimal point on the seven-segment display for the DE2-115, you need to check the control signal associated with the DP (decimal point) segment. Make sure your FPGA design includes it in the output mapping. Are you using Verilog or VHDL for implementation?