Re: [hpoj-devel] patch to improve scan speed/robustness

[<pa...@rc...>]

Hi, Joe.

> If all of the officejets always send the complete string to xojpanel, xojpanel
> shouldn't be affected by the printer's scrolling action. I'm not sure what you
> mean, though. Are you saying that some printers can send sections of a string
> rather than the whole thing? 
The 570 I have perpetually scrolls the message "See instructions to print
demo page" or something like that, except when it has a more urgent message
to display.  If I remember correctly, when I ran the original xojpanel
(which presumably didn't scroll text by itself) with this peripheral, the
message scrolled on the screen at more or less the same rate.

> The only officejet I have access to is my 600, which has only the one text line
> on its hardware lcd. It probably never sends a line2. That prevents me from
> properly testing line 2 scrolling.  Code for second line display and scrolling
> is in xojpanel now, though.
> 
> Are there any officejets that have a second line on their LCD? Do any of them
> have a second line that would ever need to be scrolled? The answers
> probably aren't necessary right now, but they could be helpful.
The 700, T, G, and K series all have two-line LCDs, and they all have at
least a few messages that scroll on the second line.  (The LaserJet 3200
also has a two-line LCD, but it's not software-retrievable.)

> If you haven't downloaded my changes yet, and are not in a hurry, wait just a
> bit. I just found and hopefully corrected another bug (a memory leak) and will
> probably put the new code on my site tomorrow.
OK.  When I get a chance (which more than likely will be after your new
version) I'll try it out on the various models I have (570, G85, K80) and
let you know what happens.

David