[avr-libc-dev] Change EEPROM SFR definition.

[Anatoly Sokolov]

Hello.

In new ATMega devices EEPROM support registers are located to other 
addresses than in AT90S/old ATMega/ ATTiny, it does illogical and error 
prone the generalized definition of these registers in IO.h. I suggest to 
change the order of definition EEPROM registers as follows:

1.To define EEPROM SFR and corresponding bits in device ioXXXXX.h files.

2. In io.h for support EEPROM library define EEPROM SFR only if any of __ 
AVR_device __ is not defined and defined __ COMPILING_AVR_LIBC __.

i.e.:

.....

#elif defined (__AVR_ATtiny11__)

# include <avr/iotn11.h>

#else

# if defined(__COMPILING_AVR_LIBC__)

/* In order to assemble the EEPROM library components without

* defining a specific device, we keep the EEPROM-related

* definitions here.

*/

# define EECR, EEDR, EEAR, EEARL, EEARH,

# define EERIE, EEMWE, EEWE, EERE

# else

# warning "device type not defined"

# endif

#endif

It will allow :

1. Fix bug #13290: avr/io.h EEAR def is flawed for the Mega48

2. To facilitate realization of a task #3586: Change from avr architectures 
to lib per device.

What your opinion on such changes?



Anatoly.