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[avr-libc-dev] [bug #18903] ATmega644 register definitions for SPI and P

From: anonymous
Subject: [avr-libc-dev] [bug #18903] ATmega644 register definitions for SPI and PRR (datasheet vs. iom*.h)
Date: Mon, 29 Jan 2007 16:20:27 +0000
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv: Gecko/20061204 Firefox/


                 Summary: ATmega644 register definitions for SPI and PRR
(datasheet vs. iom*.h)
                 Project: AVR C Runtime Library
            Submitted by: None
            Submitted on: Montag 29.01.2007 um 16:20 UTC
                Category: Header
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Header files
                  Status: None
                 Privacy: Public
        Percent Complete: 0%
             Assigned to: None
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any



The ATmega644 datasheet (2593K–AVR–01/07) lists the SPI registers as
SPCR, SPSR and SPDR. The io-"header" iomxx4.h included by iom644.h uses the
the datasheet-names with an additional 0 (null)  (also for the bit-labels).
Same for the Power-Reduction-Register: Datasheet: PRR but ioxx4.h: PRR0. Not
a big problem for those who know the backgroud but might a problem for
beginners and in code which should be portable between different
avr-"Toolchains". Seems to be the same mismatch between datasheet for
ATmega164p/324p/644p (10/06) and iomxx4.h.

Martin Thomas


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