ledscape_wait uses 100% cpu

[mikelikespie]

I'm using an older version of LEDscape (the newer version doesn't seem to work for me).

Anyways, I was noticing that ledscape_wait (and therefore pru_wait) utilize 100% cpu.

I figured out how to use the pru interrupt stuff.

Here's a patch that will make it possible to use much less CPU:

mikelikespie@64311c1

Thanks,
Mike

Very nice. How come this hasn't been merged into main?