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[avr-gcc-list] compiler not generating IO

From: developer2112 (sent by Nabble.com)
Subject: [avr-gcc-list] compiler not generating IO
Date: Thu, 26 Jan 2006 10:15:07 -0800 (PST)

I am using WinAvr C compiler and I'm trying to setup and use a UART but the compiler isn't generating IO. What could be the problem?

If I write source like this:

UDR = 'A';

I get in my listing:

        UDR = 'A';
 272: 81 e4       ldi r24, 0x41 ; 65
 274: 80 93 2c 00 sts 0x002C, r24

clearly I am not getting an "out" instruction, what gives?

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