AVR-Chat

<< is a lshift left
>> is a shift right

www.ckp-railways.talktalk.net/pcbcad21.htm


kernels_nz <kernels@slingshot.co.nz> wrote:                                  Hi Alex,
 
 Thanks for the quick response, I understand what the code does, just
 not why a bitwise AND is performed and what (1<<UDRE) "means". In my
 baby-C, I would probably have written 
 
 while (UCSRA.x != 0); 
 
 where x is the UDRE bit. Any advantages to the way it's done below ?
 
 cheers
 Hein B
 
 --- In AVR-Chat@yahoogroups.com, "Alex Shepherd" <lists06@...> wrote:
 >
 > > while ((UCSRA & (1<<UDRE))==0);
 > 
 > Loop around checking the state of the UDRE bit in the UCSRA port
 until the
 > bit value is NOT 0
 >
 
 
     
                       

 		
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