URL:
<http://savannah.nongnu.org/bugs/?18903>
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: [EMAIL PROTECTED]
Open/Closed: Open
Discussion Lock: Any
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Details:
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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