You are reading a single comment by @dwallersv and its replies.
Click here to read the full conversation.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@dwallersv
Pretty much... just that right now, there's no "awareness" of the second line in any of the code. While you can certainly write something there using the original code from @Gordon, the additions I've made are completely blind to that part of the hardware.
As implemented in the attached code above, the scroll feature is really only usable for a single line up to 40char on the first line. The concept as implemented was intended to be able to start with a clear display, send something to display via the print method, and have it do something sensible if longer than 16 char.
Because shift function of the hardware shifts both lines together over their respective buffers, makes shifting two lines of different lengths a bit awkward, if the shorter one isn't going to simply be sacrificed in "sensible" scrolling for the sake of displaying the entire longer line. A simple implementation would continue to scroll the shorter line off to the left as the rest of the longer line came into the display.
That may not be anything to fret about, in terms of the user experience. Can't say until I see it. Adding the logic to scroll to the end of the longer line (basically a Math.max() call, essentially) should be simple.
Handling the two lines independently would be a nightmare of moving data around in the buffer.