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Trinket M0 onboard APA102 led #550
3.1.8 Trinket M0 support question. On this board there is an onboard APA102 led connected to pins 7 (data) and 8 (clock). It seems those pins are not defined in FastLED.
FastLED.addLeds<APA102, 7, 8>(leds, 1);
returns the following https://pastebin.com/4Vrh5pa0
"Invalid pin specified"
I manually added the pins 7 and 8 to fastpin_arm_d21.h and changed MAX_PIN to 7 :
And it's working.