Matthew> The semantics of yield() aren't what you, or I, or 2.4
    Matthew> think they should be.  Basically, it means "go away, run
    Matthew> anything else, even the idle task, don't run me again for
    Matthew> many seconds".  I think msleep(1) is probably the best
    Matthew> for this driver, but I'm not sure exactly what semantics
    Matthew> you want.

OK, I'll make that change.  Thanks.

 - Roland