Can't link up two(2) 64x32 displays ! Shouldn't it be "plug and play" simple?

6

Ok ! Let’s do this !

For the duration of the troubleshoot these settings don’t change:

const uint8_t kRefreshDepth = 24;       // known working: 24, 36, 48
const uint8_t kDmaBufferRows = 2;       // known working: 2-4, use 2 to save memory, more to keep from dropping frames and automatically lowering refresh rate
const uint8_t kMatrixOptions = (SMARTMATRIX_OPTIONS_NONE);
const uint8_t kBackgroundLayerOptions = (SM_BACKGROUND_OPTIONS_NONE);

SMARTMATRIX_ALLOCATE_BUFFERS(matrix, kMatrixWidth, kMatrixHeight, kRefreshDepth, kDmaBufferRows, kPanelType, kMatrixOptions);
SMARTMATRIX_ALLOCATE_BACKGROUND_LAYER(backgroundLayer, kMatrixWidth, kMatrixHeight, COLOR_DEPTH, kBackgroundLayerOptions);

Settings 1

that I used to do the Panel Map

#if (SKETCH_MODE == MODE_MAP_REVERSE_ENGINEERING)
const uint8_t kMatrixWidth = 128;
const uint8_t kMatrixHeight = 16;
const uint8_t kPanelType = SMARTMATRIX_HUB75_16ROW_MOD8SCAN;
#endif

Video 1: LED_Debug_1-1 - YouTube
Video 2: LED_Debug_1-2 - YouTube

Both videos are running with SKETCH_MODE == MODE_MAP_REVERSE_ENGINEERING
The difference is where I’ve put this: backgroundLayer.fillScreen({0,0,0});

resulting in this Panel Map:

const PanelMappingEntry panelMapP5_2727_64x32[] = {
    {0,64,64},
    {8,0,64},
    {0,0,0}
};

This is how it works: LED_Debug_1-3 - YouTube
using the MODE_MAP_TESTING:

#if (SKETCH_MODE == MODE_MAP_TESTING)
const uint8_t kMatrixWidth = 64;      
const uint8_t kMatrixHeight = 32;     
const uint8_t kPanelType = SMARTMATRIX_HUB75_32ROW_64COL_MOD8SCAN_P5_2727;
#endif