cmd_screensaver??

[TangoXXVI]

Hello my fellows, i was reading the library and found the instruction cmd_screensaver, and think can be usefull a screensaver function or rutine for a sleeping mode or somethink like that.

But, I try to use, and nothing happened...

so, I look for some guidence in this comand, how it works?

Thank you.

[jamesbowman]

The screensaver command is quite clever. If you do:


GD.Clear();
GD.Begin(POINTS);
GD.PointSize(100);
GD.Vertex2f(16 * 50, 16 * 50);
GD.swap();


Then you'll get a white circle drawn on the screen at (50,50).

If you do this instead:


GD.Clear();
GD.Begin(POINTS);
GD.PointSize(100);
GD.Macro(0);
GD.swap();
GD.cmd_screensaver();


then the screensaver command will move the circle around the screen. You can actually draw anything, e.g. a bitmap, in the place of the circle.

Remember to use GD.cmd_stop() to stop the screensaver, otherwise the hardware will continue to update REG_MACRO0.

[TangoXXVI]

Hello, I starting some test, but now i have a question, about GD.Macro(0), do u have some info?

[jamesbowman]

Yes, it's all in the BridgeTek docs:

brtchip.com/wp-content/uploads/Support/Documentation/Programming_Guides/ICs/EVE/FT81X_Series_Programmer_Guide.pdf

Macro() and REG_MACRO_0 p.131
cmd_screensaver p.233