--- Mauricio Jancic <info@janso.com.ar> wrote:
> 
> if(!(PINB & (1<<PB1)))
> 
> 	Whats that? Specially the (1<<PB1)

Hi Mauricio,

1<<PB1 is 1 left-shifted by the amount of PB1, the
same as 2**PB1

The full statement is testing if a particular bit in
PINB is low - PB1 being from 0 to 7.

Cheers,

Bob



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