P10 LED display issue

[npsa]

Hello everyone, 2 days ago I found a P10 led display:

Then I connect to a UNO board and use simple code to run it and this is a result:

Where did I do something wrong?

[UKHeliBob]

Welcome to the forum

@npsa

Where did I do something wrong?

The problem is probably in your code, or just possibly in your circuit but how would we know ?

[npsa]

Sorry I forgot to up the code:

#include <SPI.h>
#include <DMD2.h>
#include <fonts/Arial_Black_16.h>

SoftDMD dmd(1,1);
// Number of P10 panels used X, Y
DMD_TextBox box(dmd, 2, 1, 32, 16);
// Set Box (dmd, x, y, Height, Width)
void setup() {
  dmd.setBrightness(200); // Set brightness 0 - 255
  dmd.selectFont(Arial_Black_16); // Font used
  dmd.begin();     // Start DMD
  dmd.clearScreen();
  box.print("LED");
}
void loop() {
}

[UKHeliBob]

I am not familiar with the library but a wild guess would be that you need to use a font that is not black

Have you tried a different font ?

DMD2/fonts at master · freetronics/DMD2

[npsa]

I've changed the font to droid_sans_16, it still not work:((

But thank you anyway

[b707]

@npsa

it still not work:((

What's you mean as "not work"? That the picture is inverted or something else?

[npsa]

Yes, It should work like this:

[UKHeliBob]

The library has an invertDisplay() function but I am not clear as to whether it turns the display upside down or inverts the colour of the display

Try it and see

[b707]

@UKHeliBob

I am not clear as to whether it turns the display upside down or inverts the colour of the display

the latter