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2x7 segment multiplexing

vikas saxena
Prodigy 250 points


can somebody please provide me with an example code for multiplexing 2 seven segment displays which will count from 0 - 99 and then rollover to zero again.

I tried many times  but failed.

please help.

  • 0
    Guru 26105 points

    Hi,

    Maybe not exactly on your specific request, but searching the internet:

    1) https://sites.google.com/site/embeddedclub4u/training/embedded-system-training-in-45-days-6-week/7-segment-display-interfacing-and-programming
    2) http://www.eeherald.com/section/design-guide/esmod4bsample.html
    3) http://users.ece.utexas.edu/~valvano/arm/  and look for this package on that page: 7Segment_811.zip
    Please pay attention to the ref.#3 - could be used for many other purposes...
    Petrei
  • 0 in reply to Petrei
    Prodigy 250 points

    I really appreciate your efforts Petrei but it was of no use to me at all.

    anyways, thanks for the immediate reply.. :)

  • 0 in reply to vikas saxena
    TI__Guru**** 244440 points

    Hello Vikas

    What was of no use? I think Petrei's effort was to use the links as a startup so that you can build your own 7-Segment Code.

    You need to give a little more effort and description when it does not work.

    Regards

    Amit

  • 0 in reply to Amit Ashara
    Guru 26105 points

    Hi Vikas,

    It is very easy - declare three variables uint8_t count, tens, units;

    and in a timer interrupt you can write like this pseudo code:

    count +=1;

    if (count==99) count =0;

    tens = count/10;

    units = count mod 10; 

    display_tens;

    display_units;

    Petrei

  • 0 in reply to Amit Ashara
    Guru 117855 points

    Amit Ashara said:
    You need to give a little more effort and description when it does not work.

    I much admire/like Petrei - yet fully support Amit here!

    Factory must "bit husband" their time/efforts - otherwise it is diluted - impacting negatively their critical efforts...  So Bravo to Amit - for gently, "stating the truth - and providing clear direction" to the poster in that process!

    Record reveals that along w/scant effort/description poster with-holds the MCU - even if it is, "this vendor's!"