Re: [avr-chat] HELP! mega128 USART receive restarts execution

[Rick Mann]

On Feb 12, 2006, at 7:10 AM, Larry Barello wrote:

> You don't want to use '!' to negate a bit mask; That isn't doing  
> what you
> think it is.  You want to use '~'

I must disagree with you here. '!' results in a non-zero byte  
becoming 0. '~' (bitwise complement) results in all the 0 bits  
becoming 1 and all the 1 bits becoming 0. If I used '~', then I'd end  
up with all the bits in the result set ('1').

But thanks; I thought that might've been it more than once, despite  
having used the technique in many successful projects. (I do it to  
help me remember all the other bits' settings, and to make it easier  
to change things).

--
Rick

smime.p7s
Description: S/MIME cryptographic signature