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  • Check outĀ­_send4bit

    The old way of doing neopixels on STM32 was:

    SPI1.setup({baud:3200000, mosi:B5});
    SPI1.send4bit(leds, 0b0001, 0b0011); // send to the lights

    and that's basically what still happens under the hood.

    If you tried:

    SPI1.send4bit(leds, 0b1110, 0b1100);

    instead then it might invert everything for you.


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