Parthenergycloud commented 6 months ago

Hello, I have used P4-2020_A3 RGB Panel on my side. I order this panel from Here, https://evelta.com/rgb-full-color-led-matrix-panel/

I have connected 4 panels in a zigzag manner with esp32 HUB75 shield.

Chain of 4x 64x32 panels for this example: +---------+---------+	2	1			(ESP32)	+---------+---------+	4	3

+---------+---------+ Here is the image of HUB75 with esp32. HUB75_ESP32

I used ESP32-HUB75-MatrixPanel-DMA library for connecting 4 panels and i used Chainedpanels example form library. In that i found some error in displaying.

→ Error i facing for display something in Chain of 4x 64x32 panels

First line of the display is shifted last line you can see in below image.

PanalAlignment

Error

→ In this image you can see that my first line is shifted in last line and i setup panels according to numbers.

→ Second thing is panal 4 first line is shifted in panel 1 last line and panel 2 first line shifted to panel 3 first line.

"I want solution of this problem of shifting line"

Here, is the example code which i used. `#include // #include "FreeSerif9pt7b.h"

define PANEL_RES_X 64

define PANEL_RES_Y 32

define NUM_ROWS 2

define NUM_COLS 2

define PANEL_CHAIN NUM_ROWS * NUM_COLS

define VIRTUAL_MATRIX_CHAIN_TYPE CHAIN_TOP_RIGHT_DOWN_ZZ

MatrixPanel_I2S_DMA dma_display = nullptr; VirtualMatrixPanel virtualDisp = nullptr;

int scrollPos = 0; // Initial position for text scrolling

void setup() { HUB75_I2S_CFG mxconfig( PANEL_RES_X, PANEL_RES_Y, PANEL_CHAIN );

dma_display = new MatrixPanel_I2S_DMA(mxconfig); dma_display->setBrightness8(255); dma_display->begin();

virtualDisp = new VirtualMatrixPanel((*dma_display), NUM_ROWS, NUM_COLS, PANEL_RES_X, PANEL_RES_Y, VIRTUAL_MATRIX_CHAIN_TYPE);

virtualDisp->setPhysicalPanelScanRate(NORMAL_TWO_SCAN); // virtualDisp->setFont(&FreeSerif9pt7b); virtualDisp->setTextColor(virtualDisp->color565(0, 0, 255)); virtualDisp->setTextSize(2); }

void loop() { // Clear previous text virtualDisp->fillScreen(virtualDisp->color565(0, 0, 0));

// Print text at the current scroll position virtualDisp->setCursor(scrollPos, 0); virtualDisp->print("HELLO");

// Increment scroll position scrollPos--;

// Reset scroll position if text has scrolled completely off the display if (scrollPos < -(virtualDisp->width())) { scrollPos = virtualDisp->width(); }

// virtualDisp->swapBuffers(false); virtualDisp->setTextWrap(false); // Delay to control scrolling speed delay(20); // Adjust as needed }`

Here is video for running above code in the panel.

In video you can see that when my hello is reach to first line i moves to last line of 2nd ROW display.

https://github.com/mrfaptastic/ESP32-HUB75-MatrixPanel-DMA/assets/110959437/9dc73fe5-3174-473f-aad8-2717a7c54963

Anyone has a solution for this problem? @mrfaptastic Please help me to solve this problem.

mrcodetastic commented 6 months ago

Clkphase?

mrcodetastic commented 6 months ago

Perhaps similar to this post:

https://github.com/mrfaptastic/ESP32-HUB75-MatrixPanel-DMA/issues/545#issuecomment-1977823058