NHD-2.8-25664 OLED Display

Comments

5 comments

  • riaz

    when i said the screen has some pixels lit (randomly) it actually looks much like The Matrix screen saver.

    0
  • Michael_L

    Since you said you are sending commands that work, followed by ones that don't, it leads me to believe that your timing is too fast.  Try either slowing down your program speed (easiest way initially) or trying adding delays after your write functions.

    0
  • riaz

    thanks for your response.

    if anything, timings are too slow (in ms) i will speed this up later.
    i have since my previous post, modified my hardware and s/w for test purposes, to 4 wire spi. that works fine. i'm displaying stuff on the screen.

    however i would like to use the parallel interface.
    the only thing i can think of it that i have tied RES (high) and CS(low). i am not controlling those pins (lack of i/os at present). could that be the problem?

    0
  • Michael_L

    Having the RES line pulled HIGH should be ok.  However, you will need to use the CS signal each time you write.  Ex: pull it low before the write cycle, and bring it back high after.

    0
  • riaz

    i will give that a go, just as soon as i can, and will report back

    many thanks

    0

Please sign in to leave a comment.