32x32 Matrix Issue

Hi all
I was trying my 32x32 SmartMatrix lib on a ESP32.
Matrix is running well with PxMatrix lib.

however I have some display issue with this lib.

Here is my Matrix

I thought the adafruit logo on it was a goos sign :wink:

no info on the HUB75 connector.

With the bitmap demo and parameter SMARTMATRIX_HUB75_32ROW_MOD16SCAN, bipmap / lines are seeing twice

With SMARTMATRIX_HUB75_16ROW_MOD8SCAN, it’s better but the 4 displayed blocks are not in the good order . All part of image are displayed but not at the right place.

Has someone an idea what can I do to ?

My working PxMatric config is:

PxMATRIX display(32,32,P_LAT, P_OE,P_A,P_B,P_C,P_D);
// Define your display layout here, e.g. 1/8 step
// Define your scan pattern here {LINE, ZIGZAG, ZAGGIZ} (default is LINE)
display.setScanPattern( LINE);
// Define multiplex implemention here {BINARY, STRAIGHT} (default is BINARY)
//display.setMuxPattern(BINARY); // STRAIGHT is not working

So default configuration here …

PS: sorry I can only upload 1 image as I’m a new user

PS my Matix has only 2 Hub 75 connector (1 in, 1 Out) not like the one shown on AliExpress web site.
I’m using the left one.

Your panel is 32x32/8, and needs to use the MultiRowMapping feature in SmartMatrix Library:

There’s some info here, and more in the MultiRowMapping sketch in the library

thx. I’ll check this

Thx louis. It’s working with:

const PanelMappingEntry panelMap32x32Mod8[] =
{0, 32, 8},
{0, 40, 8},
{0, 48, 8},
{0, 56, 8},
{8, 0, 8},
{8, 8, 8},
{8, 16, 8},
{8, 24, 8},
{0, 0, 0} // last entry is all zeros


Finally, I have found a man who has the same problem as me.:sob:
I have a 3232 P5 1/8 scan panel, two days to make it work and failed.
I just copy your ‘panelMap32x32Mod8’, but it not work for my panel, so sre you willing to share the code of ‘MultiRowRefreshMapping.ino’ of your 32
32 panel.

@merlinux - Are you able to share the full sample sketch and details of any manual changes you may have made to the library itself?

Can you confirm what values should be in SmartMatrixCommonHUB75.h for this type of panel?

Also, the MultiRowRefreshMapping file mentions CONVERT_PANELTYPE_TO_MATRIXPHYSICALROWSPERREFRESHROW, but this is not present in SmartMatrixCommonHUB75.h

Thanks, I just fixed the sketch comments and wiki

Did you ever get the panel working? I can add this type to the library if you have a complete set of map and values.

Not yet, I’ve had a couple of attempts, but struggled to use the test sketch as can’t get output when in the reverse engineer more only the test mode, so it’s been a bit of random guessing of values playing numberwang