Max nNumber of LEDs supported? about rpi_ws281x HOT 2 CLOSED

Using that many LEDs is easy. The library should support thousands of LEDs. One user has confirmed running 1200 so far. The software limit is actually much higher. As for the update frequency, you can apply some simple math. At 800Khz update frequency, with 24 bits per LED, and 110 LEDs, you get:

(800000 / 24) / 110 = 303

So you can theoretically update all 110 LEDs 303 times/sec. This of course assumes no software latency between updates. If your software/CPU load is light, I'd guess > 280 or so updates/sec easy. In my applications I typically sleep to limit the framerate to 30-60 fps. This also keeps the CPU load to < 5%. Your mileage may vary.

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Hi jgraff,
thanks for your work, I'm looking to a way to drive more than 5000 Led in a matrix, the software limit on a raspberry B appear to be 3200, after this I get : "addr_to_bus() read() failed".
The DMA of the pi is 4K, how this is related to the maximum number of leds?
Is there a way to increase this number?
I've looked at your code but doesn't understand what you mean for "channel".
Thanks in advance, BR.

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