[sdiy] OT what is _BV (AVR)

[Matthew Smith]

Quoth dan snazelle at 10/03/11 13:00...
> I know a lot of people on here use C on the AVR so i thought someone might be able to answer this question.
> 
> Much of the code I have been reading and re-reading for the AVR is made up of lines do things to the registers.
> 
> 
> I keep seeing lines that start with _BV which is a command I have not been able to find the meaning of.

It's a macro for setting specific bits in a register.  See the avr-libc 
FAQ Item "What is all this _BV() stuff about?"

http://www.nongnu.org/avr-libc/user-manual/FAQ.html#faq_use_bv

-- 
Matthew Smith

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