HUB12 1/4 scan mono ESP32 displaying nothing

1

Hi, i connected 32x16 single colored matrix to ESP32, and compiled it under platformio with Adafruit GFX. Display doesn’t show anything. Connections look correct.
I oscilloscoped signals and only colors signals aren’t toggling. When i added following line into MatrixEsp32Hub75Calc_Impl.h then all leds turning on with some brightness.

if (tempRow0[i+k].red & mask)
                        v|=BIT_R1;
                    if (tempRow0[i+k].green & mask)
                        v|=BIT_G1;
                    if (tempRow0[i+k].blue & mask)
                        v|=BIT_B1;
                    if (tempRow1[i+k].red & mask)
                        v|=BIT_R2;
                    if (tempRow1[i+k].green & mask)
                        v|=BIT_G2;
                    if (tempRow1[i+k].blue & mask)
                        v|=BIT_B2;
                    v|=BIT_R1;// added, matrix light up now

This is my main code:

#include <Arduino.h>

#include <MatrixHardware_ESP32_V0.h>

#define USE_ADAFRUIT_GFX_LAYERS

#include <SmartMatrix.h>

#define COLOR_DEPTH 24                 // known working: 24, 48 - If the sketch uses type `rgb24` directly, COLOR_DEPTH must be 24

const uint8_t kMatrixWidth = 32;        // known working: 32, 64, 96, 128

const uint8_t kMatrixHeight = 16;       // known working: 32 (untuk 1 baris), 64 (untuk 2 baris)

const uint8_t kRefreshDepth = 36;       // known working: 24, 36, 48

const uint8_t kDmaBufferRows = 4;       // known working: 2-4, use 2 to save memory, more to keep from dropping frames and automatically lowering refresh rate

const uint8_t kPanelType = SMARTMATRIX_HUB12_16ROW_32COL_MOD4SCAN;   // use SMARTMATRIX_HUB75_16ROW_MOD8SCAN for common 16x32 panels

//const uint8_t kMatrixOptions = (SMARTMATRIX_OPTIONS_HUB12_MODE);      // see http://docs.pixelmatix.com/SmartMatrix for options

const uint32_t kMatrixOptions = (SMARTMATRIX_OPTIONS_HUB12_MODE);// | SMARTMATRIX_OPTIONS_ESP32_INVERT_CLK);

SMARTMATRIX_ALLOCATE_BUFFERS(matrix, kMatrixWidth, kMatrixHeight, kRefreshDepth, kDmaBufferRows, kPanelType, kMatrixOptions);

const uint8_t kBackgroundLayerOptions = (SM_BACKGROUND_OPTIONS_NONE);

const uint8_t kGFXMonoLayerOptions = (SM_GFX_MONO_OPTIONS_NONE);

//SMARTMATRIX_ALLOCATE_GFX_MONO_LAYER(backgroundLayer, kMatrixWidth, kMatrixHeight, kMatrixWidth, kMatrixHeight, COLOR_DEPTH, kGFXMonoLayerOptions);

SMARTMATRIX_ALLOCATE_BACKGROUND_LAYER(backgroundLayer, kMatrixWidth, kMatrixHeight, COLOR_DEPTH, kBackgroundLayerOptions);

#define BLACK   0x0000

#define RED     0xF800

void setup() {

    

  matrix.addLayer(&backgroundLayer); 

  matrix.setBrightness(10);

  matrix.begin();

  backgroundLayer.setTextColor(RED);

  backgroundLayer.println("123");

  backgroundLayer.swapBuffers();

}

void loop() 

  {

      backgroundLayer.drawLine(0,0,32,16,0xffff);

      backgroundLayer.swapBuffers();

      

        delay(1000);

  

  }

Any thoughts what wrong is?

2

You need to set kMatrixHeight to double the actual height for HUB12 matrices

If that doesn’t fix it, can you try one of the example sketches, modified to drive HUB12?

3

Right! I noticed this in header file! Thanks!