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Andrew_G
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Joined: 18/10/2016
Location: Australia
Posts: 871

Posted: 02:25am 08 Sep 2020

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G'day all,
I'm sorry if I am being particularly thick but I can't get my head fully around "PAGE" etc.
What I am trying to do is the equivalent of a screen saver (not to protect the screen but to reduce the amount of light in my cave out of hours - and no I don't want to actually turn my monitor off . . .).

I have a program that collects and displays data 24/7. I'd like to continue collecting and graphing the data but blank out the screen until I want to display it. (I can trigger this by a timer, a key press, a switch or via the IR etc).

Can someone tell me how to draw graphics on a screen, which can be replaced by a blank screen (whilst the graphics screen continues to draw the graph but not show it) and then show/un-show the graphics screen by command?
(I'd prefer to use MODE 9,16 (its an early statement in the program) and I have set 'OPTION DEFAULT MODE 9').

Below is one of my attempts (calling the subroutines is easy) but it simply returns with a blank screen which it proceeds to fill as new data comes in rather than re-displaying the data copied before the CLS.

Many thanks,

Andrew

SUB ScreenSaver_On
PAGE COPY 0 to 1
CLS
PAGE WRITE 1
END SUB 'ScreenSaver_On

SUB ScreenSaver_Off
PAGE COPY 1 to 0
PAGE WRITE 0
END SUB 'ScreenSaver_Off

vegipete

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Joined: 29/01/2013
Location: Canada
Posts: 1132

Posted: 03:49am 08 Sep 2020

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I would suggest you draw your graphics on a page other than 0.

Then, copy that page to page 0 when you want to see it, otherwise just "cls" for when the screen saver is active.

Visit Vegipete's *Mite Library for cool programs.

Andrew_G
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Joined: 18/10/2016
Location: Australia
Posts: 871

Posted: 04:21am 08 Sep 2020

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Pete,
Thanks. I'm testing it now.
New data comes in roughly every 10 seconds but occasionally a second or two apart.
I know when new data has come in - so I guess it is not unreasonable to copy to page 0 each time new data has arrived?
The CMM2 is so fast that it won't be noticeable.

Cheers,

Andrew

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