On 3/6/07, Mauricio Jancic <info@janso.com.ar> wrote:
>
> Hi,
>        I modifying a C code for an ATMEL chip, and I found this statement:
>
> if(!(PINB & (1<<PB1)))
>
>        Whats that? Specially the (1<<PB1) that I cant seem to figure
> out...


That's a bit shift, a common way to address individual pins.
They are masking the read of PINB against a byte with the PB1 bit set.
So, the statement is conditional on gettting a zero on the PB1 bit of PINB.
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