A bug in, and enhancements to the HD44780 module (2-line LCD display)

You are reading a single comment by @dwallersv and its replies. Click here to read the full conversation.

•

allObjects
Great enhancements...

Questions: since scroll and shift are not the same - erwise you would have called it the same:
1. Scroll is per line... individually per line... not sync between the lines? What I mean be that is that lines with different numbers of chars, for example 30 and 40, will have different scroll cycles: the shorter one completes 2 scroll cycles while the longer one goes through one.
2. When having shifted (the view port) 20 chars to the right, what is the scrolling doing?

•

dwallersv in reply to @allObjects

Unfortunately, the hardware simply shifts the entire 2-line display over the 40 char "buffers" together -- the two lines can't be shifted separately.

The "scroll" is simply using the shift function of the HD44780 combined with setTimeout() and a little logic to handle the end condition to scroll/marquee the display.

About

Avatar for dwallersv @dwallersv started