update page

[max]

Hi,

I am writing some values to the screen with a update rate from 1 sec.
Is it possible to update one value 5 times per second without updating all other values?

thanks
max

[jamesbowman]

The GD2 uses a 'true' GPU, which means that you have to draw everything for every frame.

I might do this: make a static 'struct' with all of the values in it. The sensing code updates each value at its 'natural' rate.

Then write a function that displays everything in the 'struct', and call it after all changes.

For example...

static struct {
 int a;
 int b;
 int c;
} state;

static void sensing()
{
 state.a++;
 ...
 state.b = analogRead(A1);
 ...
 if (random(6) == 3)
   state.c++;
}

static void redraw()
{
 GD.Clear();
 GD.cmd_number(240,  50, 31, OPT_CENTER, state.a);
 GD.cmd_number(240, 150, 31, OPT_CENTER, state.b);
 GD.cmd_number(240, 200, 31, OPT_CENTER, state.c);
 GD.swap();
}

static void loop()
{
 sensing();
 redraw();
}