Make keywords variable

Projects Programming
1

Hi!

I wrote a very long piece of code to control 10 different tft displays, making use of the "select/case" method.
However, it would be much easier if I can use a single function, with an extra argument, to change the screen it displays on dynamically.

That means, I now have ten times this:

Void drawSomething1 (bmp);

tft1.startWrite();
tft1.setAddrWindow();
tft1.endWrite();

Void drawSomething2 (bmp);

tft2.startWrite();
tft2.setAddrWindow();
tft2.endWrite();

etc.

i would need something like this

Void drawSomething (bmp, selectedscreen);

selectedscreen.startWrite();
selectedscreen.setAddrWindow();
selectedscreen.endWrite();

In this way one function would take care of everything.

But: When I try to use a variable instead of tft1, tft2, etc, the library doesn't recognize the command anymore.

Can anybody point me in the right direction for solving this?

Thanks in advance!

Best regards
Bart

2

It would be much easier to help if you included your full code so we could see how things are defined.

Lacking that, I can only give a general answer: pass a pointer to the tft object that you want to use.

3

Pointers!

Something similar to:

void drawSomething (uint8_t *inbmp, TFTscreen *selectedscreen) {
  selectedscreen->startWrite();
    :
}
   :

   drawSomething(bmp, &tft1);
4

Or arrays!

screenType tft[10];

void drawSomething(Something a, byte index)
{
  tft[index].startWrite();
  tft[index].setAddrWindow();
  tft[index].endWrite();
}
5

Or arrays of pointers!

screenType *tft[10] = {tft1, tft2, tft3, ...};

void drawSomething(Something a, byte index)
{
  tft[index]->startWrite();
  tft[index]->setAddrWindow();
  tft[index]->endWrite();
}