The scrolling functionality of the display controller hasn't been implemented in the object yet.
Implement the basic functionality and demonstrate it in the demo top-level object.

Try to make the driver as much of a drop-in replacement for Parallax's Serial_Lcd.spin (or display.lcd.serial.spin equivalent) driver as possible, so that a developer wishing to migrate their project from LCD to OLED will have less difficulty doing so.

Create a new Defaults() method that has only POR default settings, and move the other display size-specific settings to Preset_*() methods.

The display controller has support for multiple user-defined characters. Add support for this. It should work as consistently as possible with that of the serial alpha LCD driver in the spin-standard-library.

The spin1 driver uses a different method of validating the row/column in ClearLine(). Instead of an if statement as in the spin2 driver, a lookdown() is used. When using FlexSpin to build (native code), ranges in lookdown(z) must be constants, but a variable is used here. For simplicity, copy the spin2 validation code into the spin1 driver.

There's no explanation of what the units are in DisplayBlink() and DisplayFade(). Are they display clocks? Clarify

This is legacy code that was obsoleted when wrdata() was created. It just adds extra code space and run-time overhead now, as it's not used by any driver methods.

Originally unplanned, but this could be useful for some applications.

ClearLine() draws a fixed 20 spaces and accepts 3rd and 4th rows, irrespective of display size.
Display line should be validated against display total rows before continuing, and number of spaces drawn should equal total display columns.

Currently only I2C is supported by the driver.

The addressing within the display's RAM as well as the cursor position updating are hardcoded for 4x20 displays.

Determine address bounds per line as well as proper update cursor position dynamically.