AVR-Chat

I think if you have a TX buffer you use that interrupt to send the next char in the buffer (if not empty).

Cat

> To: AVR-Chat@yahoogroups.com
> From: steve@terrafirma.us
> Date: Fri, 18 May 2012 06:47:48 -0700
> Subject: RE: [AVR-Chat] Re: USART Interrupts
> 
> This is somewhat of an aside.   I just finished porting my USART ISR's from
> mega to xmega.   They only use the Receive Complete (RXC) and Transmit
> Complete (TXC) interrupts.  I've always been curious as to when one would
> use the "Data Register Empty" (DRE) interrupt.  Can somebody give a brief
> reason when and why to use this one?  Thanks, Steve
> 
>  

 		 	   		  

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