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I am trying to drive a led matrix, a RGB 64x64 with a HUB75 connector, 1/32 scan, with 2 RGB lines (R1G1B1, R2G2B2), a latch pin, a clock pin, an output enabled pin, and 3 pins I don't know how to use it : A, B, NC

Image : enter image description here (also here)

Beside the A, B and NC lines, all other lines (RGB, clock, strobe, OE) behave like other "classical" HUB75 panels.

Does anyone have managed to drive a panel like mine ?

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See https://github.com/hzeller/rpi-rgb-led-matrix/issues/120

Apparently there is concern that github might fall off the face of the earth, so hopefully this intro can pass muster... There is a lot more detail in that linked thread than I can summarize adequately, but I think these are the important bits:

do you think that the pannel may be driven this way :

Display bottom line (32th) send 1 line of data (RGB+Clock) x64, strobe A, up B, strobe A x31, down B strobe latch Display previous line up B, strobe A, down B send 1 line of data (RGB+Clock) x64, strobe A, up B, strobe A x30, down B ... and scan all 32 lines ?

and

I think the roles of pins : A : strobing pushes display one row down. B : down, pushed row (by A strobe) is lit, down pushed row is black. Clocking data set it on all rows. So for each scan, I clock the data, and push only one lit row (with A and B). So I push down first row as lit, and the remainings as black, so the "lit" row moves down.

There are code samples in there for driving a panel with an RPi. Timing is apparently also important but it's possible that I'm misreading exactly how, and I have not had time to really study it. I'm working on an FPGA panel driver but back-burnering implementing this feature for now.

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  • \$\begingroup\$ Hi, I figured out how it works, and I worked with hzeller to make his lib compatible with my kind of panel. He has patched his code, I still have to test it (no free spare time yet). \$\endgroup\$ – Dede Feb 8 '18 at 0:17

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