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RE: [avr-gcc-list] WinAvr 20081205 and Xmega AVR

From: larry barello
Subject: RE: [avr-gcc-list] WinAvr 20081205 and Xmega AVR
Date: Thu, 5 Feb 2009 11:34:02 -0800

I just got email from Atmel verifying that the two instruction sequence for
updating SP is correct.

-----Original Message-----
From: Anatoly Sokolov [mailto:address@hidden 
Sent: Wednesday, February 04, 2009 11:27 AM
To: larry barello; address@hidden
Subject: Re: [avr-gcc-list] WinAvr 20081205 and Xmega AVR


>  In fact, the XMEGA A manual, page9, section 3.8 states that
> NOTHING is needed other than writing the SPL first (writing SPL disables
> interrupts for four cycles).

Wow!!!! Thanks for catch it! I wanted to see it in the new core and upset 
when not found.

In ATxmega A MANUAL revision A there was no information about disabing 
interrupts during writing the SP.

Eric, we are now to significantly reduce prologue/epilogue code for the 
Xmega devices.

Thanks, Larry.


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