64x64 panel no longer working after library update

[theissondergaard]

I have a sketch and 64x64 panel that used to worked flawlessly. I wanted to update it with a few new features, but it had been a long time since I last worked on it, and I had to update both my Arduino IDE and the MatrixPanel library, to get the sketch to compile.

Now that it does compile, I´m clearly missing something in a configuration: When fx I fill the panel with a fullscreen color, it will make 8 rows of the color, but with 8 rows of black in between. Meaning blocks of 64x4 pixels alternating between color and black, 16 rows in total. Same pattern occurs for any graphics I try to display.

I did realize that the library changed quite a bit since I last used it, so I tried to adapt the pin configuration and other aspects accordingly, but I must be missing something! Here´s what I have in terms of pin configs, and setup part:

// Configure for your panel(s) as appropriate!
#define R1_PIN 4
#define G1_PIN 6
#define B1_PIN 8
#define R2_PIN 10
#define G2_PIN 11
#define B2_PIN 12
#define A_PIN 13
#define B_PIN 34
#define C_PIN 33
#define D_PIN 35
#define E_PIN 36 // required for 1/32 scan panels, like 64x64. Any available pin would do, i.e. IO32
#define LAT_PIN 1
#define OE_PIN 2
#define CLK_PIN 3

#define PANEL_RES_X 64 // 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
#define PIN_E 36

MatrixPanel_I2S_DMA *dma_display = nullptr;

and in setup(), I have:

HUB75_I2S_CFG::i2s_pins _pins={R1_PIN, G1_PIN, B1_PIN, R2_PIN, G2_PIN, B2_PIN, A_PIN, B_PIN, C_PIN, D_PIN, E_PIN, LAT_PIN, OE_PIN, CLK_PIN};
HUB75_I2S_CFG mxconfig(
64, // Module width
64, // Module height
1, // chain length
_pins // pin mapping
);

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
dma_display = new MatrixPanel_I2S_DMA(mxconfig);
dma_display->setBrightness8(128); // range is 0-255, 0 - 0%, 255 - 100%
dma_display->setLatBlanking(3);

Any ideas what I´m missing / doing wrong? I haven´t rewired the panel, and it worked fine before I uploaded the adapted sketch with the latest library (3.0.10)

[mrcodetastic]

What was the fix? Address line pin mapping wrong?

[theissondergaard]

Yeah, 100% on my side. While I had my head buried in width/height/chain stuff, I completely missed that two of the pins were incorrectly assigned in the test-sketch I was debugging in....