I have created an example on driving the WS2812B based LED strips from the Wixel SPI interface. I have not bothered though to make any radio or USB control interface to alter the LED pattern or so. I use 4 bits to encode the ONE and ZERO patterns required by the WS2812S spec. This unfortunately wastes a bit of memory.
The 'service' function updates the LED pattern and initiates the DMA transfer.
If one want to solder a bit, it is possible to use tow PWM channels and just use one bit on the wixel to represent a WS2812B bit. One of the PWM channels generates the pattern for a ZER0 bit and the other PWM channel the pattern for a ONE bit. This requires for instance a a 74HC153 circuit that alters between the PWM channels depending on SPI output.
If you find the source code useful or wasteful, please provide feed back.
main.c (9.13 KB)