joel.sherrill at oarcorp.com
Tue Oct 16 11:48:42 CDT 2007
Paul Evans wrote:
> >From what I recall from talking to an Atmel rep:
> AVR32 is a new from scratch 32bit MCU more akin to Atmel's ARM product
> line. Most of the peripheral IP comes from the ARM family and not the
> existing AVR family. (I haven't checked though) I think the products
> are closer to a Blackfin DSP in terms of performance and memory.
That corresponds well to the Wikipedia entry on AVR32. It says the only
common things between AVR and AVR32 is the name and the design center.
There is not an AVR32 port in the standard GNU tools as best I can tell.
There is a set of patches at
http://avr32linux.org/twiki/bin/view/Main/DevelopmentTools for binutils
2.17 and gcc.4.0.4.
Still a feasible target. You just have more work on the tools and
have to do the score/cpu/avr32 framework. Very typical of other
ports I have done.
> Joel Sherrill wrote:
>> Scott Newell wrote:
>>> At 03:00 AM 10/16/2007 , Ralf Corsepius wrote:
>>>> As it has never been completed (and still is incomplete), it has never
>>>> been explicitly addressing "small" nor "big" avrs. It's just the "avr
>>>> family", as it's being defined by GCC.
>>> Isn't AVR32 completely different than AVR? I don't think a single common
>>> toolchain supports both the 8 bit AVR family and the 32 bit AVR32 family.
>> It may be a different instruction set but I don't see avr vs avr32
>> in config.gcc. There is only avr-:
>> The RTEMS AVR tools build the following multilibs:
>> $ /opt/rtems-4.9/bin/avr-rtems4.9-gcc --print-multi-lib
>> But the gcc info description of those cpu differences don't sound
>> like avr32:
>> Instruction set avr3 is for the classic AVR core with up to 128K
>> program memory space (MCU types: atmega103, atmega603, at43usb320,
>> Instruction set avr4 is for the enhanced AVR core with up to 8K
>> program memory space (MCU types: atmega8, atmega83, atmega85).
>> Instruction set avr5 is for the enhanced AVR core with up to 128K
>> program memory space (MCU types: atmega16, atmega161, atmega163,
>> atmega32, atmega323, atmega64, atmega128, at43usb355, at94k).
>> The base avr and avr2 will be hard to get RTEMS into since avr2 has up to
>> 8K program space. But avr3-5 would be OK but wouldn't run all tests and
>> couldn't support the RTEMS TCP/IP stack.
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