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[avr-libc-dev] [bug #32551] util/delay.h delays longer than they should

From: Frank Zhao
Subject: [avr-libc-dev] [bug #32551] util/delay.h delays longer than they should be
Date: Mon, 21 Feb 2011 06:01:32 +0000
User-agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.20 (KHTML, like Gecko) Chrome/11.0.672.2 Safari/534.20


                 Summary: util/delay.h delays longer than they should be
                 Project: AVR C Runtime Library
            Submitted by: frank26080115
            Submitted on: Mon 21 Feb 2011 06:01:31 AM GMT
                Category: Header
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Header files
                  Status: None
        Percent Complete: 0%
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 1.7.0
           Fixed Release: None



Revision 2103 seems to have caused all delay functions in util/delay.h to last
longer than they should, I think it's exactly 4 times longer. This affects MHV
AVR Tools 20100815 (avr-libc version 1.7.0) and the AVR Toolchain provided
with Atmel's AVR Studio 4.18 (avr-libc version 1.7.0). The last WinAVR package
does not contain this problem (I think they used 1.6.4).

An example of the problem is demonstrated by this forum post as well


I have seen bug 30363 but it seems unrelated


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