Only upper half of P5 2121 64x32 16S module work

[betopashic]

Hi there, I use ESP32-HUB75-MatrixPanel-DMA with ESP32 and P5 2121 64x32 16S module with ICN2038S.
Only upper half of module work. Can somebody advice for solution? Thanks, Regards

[mrcodetastic]

Looking like you have a electrical wiring issue more than anything. All the LEDs shouldn't be glowing green in any case, especially if running the normal "bouncing squares" demo

[mrcodetastic]

Double check your grounding as well. You must make sure the ground on the ESP32 is going to one of the ground pins on the HUB75 connector as well.

[betopashic]

I check all, problem is still here. I have several led modules, with different pixel pitch, different scan mode, different IC led driver. But without result. Can you please specify some led module that you use and work ok with your lib? Pixel pitch, scan mode, IC led driver, so I will try to found that model. Thanks, regards.

[mrcodetastic]

Have you read the README?

[betopashic]

Yes of course. I read README file - led panel with ICN2038S, 16S, 64x32 pixels don't work. I try and check everything, no result.

Now, I use code from kucukkose on P6 (3535) 8S 32x32 led panel with TC5020AP IC led driver and the result is like on attached image.
With
dma_display->setCursor(0,0); dma_display->print("Hello");
text start on x=0 and y=9.

When I try with
dma_display->setCursor(0,10); dma_display->print("Hello");
the result is like on second image.

I try also with second solution from kucukkose with 1/8 Scan Panel Demonstration but a lot of error is here:
OneEightMatrixDisplay = new VirtualMatrixPanel((*dma_display), NUM_ROWS, NUM_COLS, PANEL_RES_X, PANEL_RES_Y, SERPENT, TOPDOWN);
with candidate expects 6 arguments, 7 provided explanation and error: 'ONE_EIGHT_32' was not declared in this scope
I try with some lib modification but without result.

Advice for solution? Thanks and best regards.

[rigorka]

Looks like you might have a row swapping issue similar to the one I had with 64x64 1/16 panels.

Try

v_display = new VirtualMatrixPanel((*dma_display), NUM_ROWS, NUM_COLS, PANEL_RES_X, PANEL_RES_Y, CHAIN_TOP_RIGHT_DOWN);
    
// THE IMPORTANT BIT BELOW!
v_display->setPhysicalPanelScanRate(FOUR_SCAN_64PX_HIGH);

If that does not help - try to write a test code which lights up the pixels line by line with some 0.5 sec delay between the lines, from y=0 to y=31, and see in what order the real lines will be appearing at on the screen. This might give some clues on how to fix your issue.