bugAVR C Runtime Library - Bugs: bug #11714, EEAR problem with atmega48 in io.h


bug #11714: EEAR problem with atmega48 in io.h

Submitted by:  None
Submitted on:  Mon 24 Jan 2005 09:26:17 AM UTC  
Category:  Header Severity:  3 - Normal
Priority:  5 - Normal Item Group:  None
Status:  Invalid Assigned to:  Eric Weddington <arcanum>
Percent Complete:  0% Originator Email:  -email is unavailable-
Open/Closed:  Closed Release:  None
Fixed Release:  None

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Tue 25 Jan 2005 07:54:35 PM UTC, comment #1: 

The <avr/io.h> header file #defines EEAR as 0x1E, and then later it includes the device specific header file <iom48.h>, this header then includes <avr/iomx8.h>. In the iomx8.h header file EEAR is undefined (#undef) and then redefined with the correct address and the correct width.

This bug is invalid.

Eric Weddington <arcanum>
Project AdministratorIn charge of this item.
Mon 24 Jan 2005 09:26:17 AM UTC, original submission:  

because atmega48 E2END is 0xff in IO.h E2END < 0x100 will
define # if E2END > 0
# define EEAR _SFR_IO8(0x1E)
# endif

so complier result EEAR is _SFR_IO8(0x1E)

but atmega48 EEAR is SFR_IO16(0x21) true not  _SFR_IO8(0x1E).
So i add  && !defined(_COMPILING_AVR_LIBC_) && !defined in io.h.

//add && !defined(_AVR_ATmega48_) by tom.zhang 2005.1.23
#if E2END < 0x100 && !defined(_COMPILING_AVR_LIBC_) && !defined(_AVR_ATmega48_)
# undef EEAR
# if E2END > 0
# define EEAR _SFR_IO8(0x1E)
# endif
# undef EEARH



(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

Attach Files:

Attached Files
file #2410:  io.h added by None (9KiB - application/octet-stream)


Depends on the following items: None found

Items that depend on this one: None found


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  • -email is unavailable- added by joerg_wunsch (Updated the item)



    Follow 5 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2007-10-22 joerg_wunsch PrivacyPrivate => Public
    2005-01-25 arcanum StatusNone => Invalid
        Open/ClosedOpen => Closed
    2005-01-25 arcanum Assigned toNone => arcanum
    2005-01-24 None Attached File- => Added io.h, #2104

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