Part 3 – Getting started with a 128×64 Graphics LCD Display – Passing instructions

This part explains how to pass instructions/commands to the GLCD. On a high level, these are the steps:

  1. Select the GLCD half-section
  2. Put the Enable Pin LOW
  3. Put RS, RW and Data pins HIGH or LOW based on your command
  4. Put the Enable Pin HIGH
  5. Wait 2 milliseconds
  6. Put the Enable Pin LOW
  7. Wait 2 milliseconds
  8. GLCD responds

And you’re done! Easy-peasy!

Well, not quite. Let’s look into each of these steps in a little more detail. Here’s an image from the last part for quick reference:

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