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Cannot specify SPI data rate on Teensy 4 #890

woundedlion opened this issue Sep 18, 2019 · 2 comments


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commented Sep 18, 2019

The SPI_DATA_RATE template parameter to addLeds() is declared as a uint8_t. On Teensy 4, DATA_RATE_MHZ and DATA_RATE_KHZ are defined to pass the raw clock rate in Hz to the Controller class, yielding values larger than 255. The value is truncated resulting in an incorrect/unusable SPI clock rate. I fixed this by redefining as uint32_t.


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commented Sep 20, 2019

Thanks for your fix, I tried it and it worked for me with setting the clock rate for APA102 LEDs. I changed SPI_DATA_RATE here:


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commented Sep 20, 2019

Sure, posted a PR here: #891

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