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Re: [avr-gcc-list] Cicrular Buffer routines

From: David Kelly
Subject: Re: [avr-gcc-list] Cicrular Buffer routines
Date: Tue, 16 Aug 2005 20:11:17 -0500

On Aug 16, 2005, at 6:07 PM, Bob Paddock wrote:

You can test to make sure that you do have a power of two buffer size with the

#define myQ_SIZE    64

#define myQ_MASK ( myQ__SIZE - 1 )
#if ( myQ__SIZE & myQ__MASK )
 #error myQ_SIZE buffer size is not a power of 2

Wouldn't it be easier to simply define the size like this:

#define myQ_SIZE    (1<<6)

If you shift a 1 then it must be a power of 2.

David Kelly N4HHE, address@hidden
Whom computers would destroy, they must first drive mad.

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