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Re: [avr-gcc-list] What's wrong with this preprocessor statement

From: Uwe Bonnes
Subject: Re: [avr-gcc-list] What's wrong with this preprocessor statement
Date: Sun, 25 Feb 2001 15:54:27 +0100

>>>>> "Nicolas" == Nicolas Nickisch <address@hidden> writes:

    Nicolas> Hi, I am trying to implement a delay-loop with the following
    Nicolas> #define-statement:

    Nicolas> #define delay2(microseconds) { unsigned long x; x=((( (unsigned
    Nicolas> long) microseconds*F_CPU)/(13000000)));while(x--){}}


    Nicolas> Any ideas ?


did you compile with optimization? Then perhaps the loop was optimized away.

Put the "volatile" keyword before the variable and try again.

Uwe Bonnes                address@hidden

Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt
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