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Activity overview

Latest activity by clebell
  • clebell commented,

    I was assuming that, after making the interface pin selection, the other display parameters were already configured at power on.Perhaps that was the source of my previous confusion.This will keep m...

  • clebell commented,

    It seems I was mistaken.  Maybe.  This is too much.This is a NHD-0420CW-AB3. I have been orienting the display with the row of connector pads at the bottom.So I just turned it upside down and the t...

  • clebell commented,

    Just tried it.  No change.I suspect that I may have a fried controller. The static electricity around here is brutal, even though I have all kinds of ESD protection on my bench.I'll find out soon. ...

  • clebell commented,

    To summarize:1.  Power on: The display is mirrored top to bottom. Characters are upside down.2.  Reset the display by grounding the /RES pin: Display and characters are now right side up, but mirro...

  • clebell commented,

    I reset the display using the active low reset signal (/RES).Now the characters are right side up, but they are reversed right to left.Questions:  1.  I was assuming that I could rely on the power-...

  • clebell created a post,

    NHD-0420CW Display Upside Down

    Display:    NHD-0420CWInterface: I2C with a BeagleBone BlackUsage:     Clear display and display text. Nothing more complicated than that.Problem:  Yesterday the display worked as expected - 4 line...