RGB 64x128 display 1/16 scan rate

[vadimmotruc]

Did anyone tried to control and single RGB panel with 64x128 resolution? I tried to set the width and height as needed, but seems that it is not working. The image is flickering and doubled.
I'm trying to use this display: [https://a.aliexpress.com/_EyZNYkS]
It is a HUB75 interface with ABCD pins only. I have also another one with [(https://a.aliexpress.com/_Ev2fcuE)] which is 1/32 scan rate and based on ICN2037 integrated circuit.
Please let me know if someone tried this displays! Thank you in advance!

[board707]

You are lucky :)
I am not the author of this library, but I am here specifically to help people launch their panels.
In order for me to be able to help you, I need to know all the data of your matrix - pixel size, number of scans and both types of drivers on each panel.

[vadimmotruc]

Hello,
I would like also to contribute to the library. I'm quite experienced with different communication protocols. I have to pannels of the same size: 128x64. One is outdoor with scan rate 1/16, HUB75 ABCD, and the second one is indoor with scan rate of 1/32, HUB75E. For the indoor panel, the used drivers are: ICN2037, 74HC245 and a FM TC7262FJ.
Here is a picture with the indoor one:
For the outdoor panel, the following drivers are used: sm16208s+sm5166.

[board707]

The both panels seems to be compatible with the library. The indoor one doesn't needs any specific settings and should run fine "out of the box". Outdoor panel may needs a custom pixel mapping to work.

[vadimmotruc]

Thank you for your answer. The pixel mapping will not be an issue, however, I'm still trying to identify the settings of the library in order to work with outdoor panel. Once I have it, I would create a pull request to have it as Demo. Do you have any suggestions for the settings, let me know to speed up the process. Thank you in advance.

[board707]

I'm still trying to identify the settings of the library in order to work with outdoor panel.

Apart from the fact that it is a "quarter scan panel", it has no other specific features and does not require any settings.
Have you tried running Pixel_Mapping_Test example with this panel?

[vadimmotruc]

Hello board707,
Indeed i have tried PixelMappingTest, but i couldn't achieve a state which is deterministic. I could only turn on few red pixel and few white pixel. For the red pixels (line part or the pattern test) it looks deterministic, but does not make sense yet for me. For the white pixel, it looks more like a noise. I have attached pictures with the results. I will post updates as I will have because i did not managed to test all available options yet and i put on hold the outdoor panel. Thank you for your support!!

[board707]

I have attached pictures with the results.

The steady pictures helps nothing to describe the issue, show the video of the Pixel_Mapping_Test example running on the panel.

[Sourgin]

Hello, #797 Thats the K716 one.

Mine had The Hub75E something wierdly. So i had to remap colos.
The RGB channels from the conector are GBR < Can be that SMD pixels we're rotated upon installation.

File \PlatformIO\Projects\Computer.pio\libdeps\esp32-s3-devkitc-1-n16r8v\ESP32 HUB75 LED MATRIX PANEL DMA Display\src\platforms\esp32s3\esp32s3-default-pins.hpp

#pragma once

// Colors Connector based on standard Hub75e wiring
// 5    7   | 9    10   | 6    15
// R1   R2  | G1   G2   | B1   B2
// Blue     | Red       | Green

// Correct connection
// 9    10  |6    15    | 5    7 
// R1   R2  |G1   G2    | B1   B2 
// RED      |GREEN      | BLUE

#define R1_PIN_DEFAULT 9
#define R2_PIN_DEFAULT 10

#define G1_PIN_DEFAULT 6
#define G2_PIN_DEFAULT 15

#define B1_PIN_DEFAULT 5
#define B2_PIN_DEFAULT 7

// Address Pins
#define A_PIN_DEFAULT  16
#define C_PIN_DEFAULT  17
#define E_PIN_DEFAULT  11 
#define B_PIN_DEFAULT  12
#define D_PIN_DEFAULT  13

// Control Pins
#define CLK_PIN_DEFAULT 18
#define OE_PIN_DEFAULT  8
#define LAT_PIN_DEFAULT 14

With this you could get the K716 running assumming if it's the same bad batch as mine.

File main.cpp

// Main Script 

#include <ESP32-HUB75-MatrixPanel-I2S-DMA.h>
#include <Fonts/Picopixel.h>
#include <EspUsbHost.h>

//#include <pomodoro.h>
//#include <kanban.h>

#define PANEL_RES_X 128    // Number of pixels wide of each INDIVIDUAL panel module. 
#define PANEL_RES_Y 64     // Number of pixels tall of each INDIVIDUAL panel module.
#define PANEL_CHAIN 1      // Total number of panels chained one to another

//MatrixPanel_I2S_DMA dma_display;
MatrixPanel_I2S_DMA *dma_display = nullptr;

void setup() {
  // Module configuration
  HUB75_I2S_CFG mxconfig(
    PANEL_RES_X,   // module width
    PANEL_RES_Y,   // module height
    PANEL_CHAIN    // Chain length
  );
  // I don't know if this line is needed as i defined pin.e on the other file but i'm a carebear
  mxconfig.gpio.e = 11;
  // Bye flicker
  mxconfig.clkphase = false;
  // esp32 - panel dictionary
  mxconfig.driver = HUB75_I2S_CFG::ICN2038S;
  // Activate double_buffer so we erradicate buffer once and for all
  mxconfig.double_buff = true; //before this


  // Display Setup
  dma_display = new MatrixPanel_I2S_DMA(mxconfig);
  dma_display->begin();
  dma_display->setBrightness8(32); //0-255
  // Clear the screen
  dma_display->clearScreen();
  
  // Initialize Serial output
  // Serial.begin(115200);
  // esp_log_level_set("*", ESP_LOG_VERBOSE);
}

void loop() {
  // Clear buffer data
  dma_display->fillScreen(0);
  // Draw the content
  //drawContent();
  dma_display->flipDMABuffer();
 // Save some oxygen for the planet
  delay(100);
}

I hope this helps you. Colors on you pannel might be right. so you don't have to remap them.