Hi. I use teensy 3.2 with ethernet+Wiz820 shield to get artnet data and drive

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1

Hi.
I use teensy 3.2 with ethernet+Wiz820 shield to get artnet data and drive one strip of 300 leds APA102 via octo2811 adaptor.
Can i use the second SPI bus on 7 & 14 pin (the first is used by ethernet shield) without any problem?
Or do i need to force this pins to be used by software SPI?
Is it really better to use octo2811 library or just fastled is enough?
Thank you.

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Fastled is supporting octows2811 so the only thing you have to do is something like :
#include<OctoWS2811.h>
#include<FastLED.h>
#define USE_OCTOWS2811

void setup() {
LEDS.addLeds(table.ledArray, NUM_LEDS_PER_STRIP);
LEDS.setBrightness(currentBrigthness);
}

But to gain the maximum of speed you have to split the 300 leds in 8 more or less equal strips and use the 8 data lines. From programming point of view it will still look like one long strip. otherwise its anyway meaningless
http://LEDS.se

3

Thank You. I can’t split the fixture. It’s a 2 meters very thin led bar wich i need to install and use quickly (for a show) with only one command cable.
So i use only 2 output of the octo (DATA &Clock)
My question is because OCTO uses DMA capacities of the teensy 3.2 and so is it faster than just fastled?

4

huh i don’t know :wink: probalby ask in the prjc forum : https://forum.pjrc.com/