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hzeller / rpi-rgb-led-matrix

Controlling up to three chains of 64x64, 32x32, 16x32 or similar RGB LED displays using Raspberry Pi GPIO
GNU General Public License v2.0
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Request for info: What bus is in the 64x32 RGB LED Matrix - 4mm pitch panels from Adafruit (or in panels in general)? #1137

Closed Indifferent-Shiba closed 4 years ago

Indifferent-Shiba commented 4 years ago

I have been working with the 64 x 32 panels from Adafruit to make a Social Media Counter as a school project and found that spec wise I can't find much about them. I don't know if this is the place to ask, but does anyone know much about the kinds of computing buses they put int RGB LED panels?

hzeller commented 4 years ago

The connection to these panels is called HUB75 ... but there is no clear spec, more a hodgepodge of things that are sortof compatible.

Mostly, it is a 6 bit wide shift register to clock in two rows of RGB on/off information, then control signals such as latching these, a selector which of the rows are affected and when to switch them on. So you constantly have to push data there to keep the pixels updated.

I wouldn't call this a 'bus' really. And there is not really much 'computing' going on on these panels either.

Indifferent-Shiba commented 4 years ago

Thank you for your guys' insights! I think I understand the panels better now, and realized that I was looking at them at the wrong angle.