You should probably set up the clock before calling initStrip rather than after. This would only affect the initial clearStrip call, though. Something else I noticed is missing (the author wouldn't have had to do this on a F2/G2 device, but it's needed for FRx devices): > PM5CTL0 &= ~LOCKLPM5; // Engage GPIOs You can do this any time before the initStrip call. Are you fairly certain your strip is powered properly? I (vaguely) recall that a strip of 12x draws a fair amount of power.
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