64x64 panel, every pair of lines are blank

[Tenumen]

Hi there
Would someone be able to point me to what is wrong with my setup and causing this issue where two lines are working then the next two are blank?

I am using an unnamed panel with E but no D channel. I obtained this pattern by running the Plasma Pattern example with only the pin-outs changed. I am using an ESP32-WROOM Dev board connected directly to the panel via a simple breadboard -so I am sending 3.3v signals to the panel.

Any guidance that someone can offer me would be much appreciated.
Thanks

[Tenumen]

PS I wired it up with a D line in the usual place which generated the above image with half the lines missing. I haven't tested if the D line is doing anything though.

[board707]

Did you uncomment setting for E pin in the code?

[Tenumen]

I don't remember needing to but I can't find anything uncommented. Here's the code:

/*
 * Portions of this code are adapted from Aurora: /~https://github.com/pixelmatix/aurora
 * Copyright (c) 2014 Jason Coon
 *
 * Portions of this code are adapted from LedEffects Plasma by Robert Atkins: https://bitbucket.org/ratkins/ledeffects/src/26ed3c51912af6fac5f1304629c7b4ab7ac8ca4b/Plasma.cpp?at=default
 * Copyright (c) 2013 Robert Atkins
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 

// HUB75E pinout
// R1 | G1
// B1 | GND
// R2 | G2
// B2 | E
//  A | B
//  C | D
// CLK| LAT
// OE | GND

//  Default library pin configuration for the reference
 // you can redefine only ones you need later on object creation

#define R1 25
#define G1 26
#define BL1 27
#define R2 14
#define G2 12
#define BL2 13
#define CH_A 23
#define CH_B 22
#define CH_C 5
#define CH_D 17
#define CH_E 32 // assign to any available pin if using two panels or 64x64 panels with 1/32 scan
#define CLK 16
#define LAT 4
#define OE 15

//


#include <ESP32-HUB75-MatrixPanel-I2S-DMA.h>
#include <FastLED.h>

// Configure for your panel(s) as appropriate!
#define PANEL_WIDTH 64
#define PANEL_HEIGHT 64  	// Panel height of 64 will required PIN_E to be defined.
#define PANELS_NUMBER 2 	// Number of chained panels, if just a single panel, obviously set to 1
#define PIN_E 32

#define PANE_WIDTH PANEL_WIDTH * PANELS_NUMBER
#define PANE_HEIGHT PANEL_HEIGHT


// placeholder for the matrix object
MatrixPanel_I2S_DMA *dma_display = nullptr;


uint16_t time_counter = 0, cycles = 0, fps = 0;
unsigned long fps_timer;

CRGB currentColor;
CRGBPalette16 palettes[] = {HeatColors_p, LavaColors_p, RainbowColors_p, RainbowStripeColors_p, CloudColors_p};
CRGBPalette16 currentPalette = palettes[0];


CRGB ColorFromCurrentPalette(uint8_t index = 0, uint8_t brightness = 255, TBlendType blendType = LINEARBLEND) {
  return ColorFromPalette(currentPalette, index, brightness, blendType);
}

void setup() {
  
  Serial.begin(115200);
  
  Serial.println(F("*****************************************************"));
  Serial.println(F("*        ESP32-HUB75-MatrixPanel-I2S-DMA DEMO       *"));
  Serial.println(F("*****************************************************"));

  /*
    The configuration for MatrixPanel_I2S_DMA object is held in HUB75_I2S_CFG structure,
    pls refer to the lib header file for full details.
    All options has it's predefined default values. So we can create a new structure and redefine only the options we need 

    // those are the defaults
    mxconfig.mx_width = 64;                   // physical width of a single matrix panel module (in pixels, usually it is always 64 ;) )
    mxconfig.mx_height = 32;                  // physical height of a single matrix panel module (in pixels, usually almost always it is either 32 or 64)
    mxconfig.chain_length = 1;                // number of chained panels regardless of the topology, default 1 - a single matrix module
    mxconfig.gpio.r1 = R1;                    // pin mappings
    mxconfig.gpio.g1 = G1;
    mxconfig.gpio.b1 = B1;                    // etc
    mxconfig.driver = HUB75_I2S_CFG::SHIFT;   // shift reg driver, default is plain shift register
    mxconfig.double_buff = false;             // use double buffer (twice amount of RAM required)
    mxconfig.i2sspeed = HUB75_I2S_CFG::HZ_10M;// I2S clock speed, better leave as-is unless you want to experiment
  */

  /*
    For example we have two 64x64 panels chained, so we need to customize our setup like this

  */
  HUB75_I2S_CFG mxconfig;
  mxconfig.mx_height = PANEL_HEIGHT;      // we have 64 pix heigh panels
  mxconfig.chain_length = PANELS_NUMBER;  // we have 2 panels chained
  mxconfig.gpio.e = PIN_E;                // we MUST assign pin e to some free pin on a board to drive 64 pix height panels with 1/32 scan
  
  
 //mxconfig.driver = HUB75_I2S_CFG::FM6126A;     // in case that we use panels based on FM6126A chip, we can change that ****USE FOR WAVESHARE PANNEL



  /*
    //Another way of creating config structure
    //Custom pin mapping for all pins
    HUB75_I2S_CFG::i2s_pins _pins={R1, G1, BL1, R2, G2, BL2, CH_A, CH_B, CH_C, CH_D, CH_E, LAT, OE, CLK};
    HUB75_I2S_CFG mxconfig(
                            64,   // width
                            64,   // height
                             4,   // chain length
                         _pins,   // pin mapping
      HUB75_I2S_CFG::FM6126A      // driver chip
    );

  */


  // OK, now we can create our matrix object
  dma_display = new MatrixPanel_I2S_DMA(mxconfig);

  // let's adjust default brightness to about 75%
  dma_display->setBrightness8(192);    // range is 0-255, 0 - 0%, 255 - 100%

  // Allocate memory and start DMA display
  if( not dma_display->begin() )
      Serial.println("****** !KABOOM! I2S memory allocation failed ***********");
 
  // well, hope we are OK, let's draw some colors first :)
  Serial.println("Fill screen: RED");
  dma_display->fillScreenRGB888(255, 0, 0);
  delay(1000);

  Serial.println("Fill screen: GREEN");
  dma_display->fillScreenRGB888(0, 255, 0);
  delay(1000);

  Serial.println("Fill screen: BLUE");
  dma_display->fillScreenRGB888(0, 0, 255);
  delay(1000);

  Serial.println("Fill screen: Neutral White");
  dma_display->fillScreenRGB888(64, 64, 64);
  delay(1000);

  Serial.println("Fill screen: black");
  dma_display->fillScreenRGB888(0, 0, 0);
  delay(1000);


  // Set current FastLED palette
  currentPalette = RainbowColors_p;
  Serial.println("Starting plasma effect...");
  fps_timer = millis();
}

void loop() {
  
    for (int x = 0; x < PANE_WIDTH; x++) {
            for (int y = 0; y <  PANE_HEIGHT; y++) {
                int16_t v = 0;
                uint8_t wibble = sin8(time_counter);
                v += sin16(x * wibble * 3 + time_counter);
                v += cos16(y * (128 - wibble)  + time_counter);
                v += sin16(y * x * cos8(-time_counter) / 8);

                currentColor = ColorFromPalette(currentPalette, (v >> 8) + 127); //, brightness, currentBlendType);
                dma_display->drawPixelRGB888(x, y, currentColor.r, currentColor.g, currentColor.b);
            }
    }

    ++time_counter;
    ++cycles;
    ++fps;

    if (cycles >= 1024) {
        time_counter = 0;
        cycles = 0;
        currentPalette = palettes[random(0,sizeof(palettes)/sizeof(palettes[0]))];
    }

    // print FPS rate every 5 seconds
    // Note: this is NOT a matrix refresh rate, it's the number of data frames being drawn to the DMA buffer per second
    if (fps_timer + 5000 < millis()){
      Serial.printf_P(PSTR("Effect fps: %d\n"), fps/5);
      fps_timer = millis();
      fps = 0;
    }
} // end loop