RE: [avr-libc-dev] ATMEGA16U2 support

[Weddington, Eric]

I just tried to send patches to the avr-gcc-list ML for binutils 2.20, but my 
corp email server was having some difficulty. I'll try again later.

> -----Original Message-----
> From: 
> address@hidden 
> [mailto:address@hidden
> org] On Behalf Of Paul Rathgeb
> Sent: Wednesday, February 17, 2010 2:23 PM
> To: Joerg Wunsch
> Cc: address@hidden
> Subject: Re: [avr-libc-dev] ATMEGA16U2 support
> 
> I'm currently trying to recompile my toolchain with the support for
> atmegaXXu2 MCUs, but I'm unable to find the patches for 
> binutils 2.20 /
> gcc 4.4.[23]. 
> There's no new patches for new devices here
> ( 
> http://www.freebsd.org/cgi/cvsweb.cgi/ports/devel/avr-binutils
> /files/patch-newdevices ) since Jun 2009. Where can I found 
> the latest patches to add the u2 support ?
> 
> Thanks in advance,
> 
> Paul Rathgeb
> 
> On Fri, 2010-02-05 at 11:28 +0100, Joerg Wunsch wrote:
> > As Paul Rathgeb wrote:
> > 
> > > Unfortunately, I don't found informations about the 
> avr-libc support for
> > > this controller. ATMEGA16U4 seems supported, but I don't 
> know if I can
> > > use this MCU type for the compilation.
> > 
> > ATmega16U2 is supported by avr-libc, provided your compiler has been
> > patched to support it.  Presence of respective compiler support is
> > autodetected when running avr-libc's configure script, and the
> > respective pieces are omitted if the compiler support is missing.
> > 
> > I don't have an idea whether the AT90USB162 and the ATmega16U2 are
> > binary (probably upwards) compatible; however, usually there are
> > application notes available describing that kind of 
> migration process.
> > Please see whethere there's one around for this transition, and what
> > it has to tell about binary compatibilty.  Of course, if they are
> > binary compatible, you could just compile the code for an AT90USB162
> > (which is likely to have better support even in somewhat older
> > toolchain versions).
> > 
> 
> 
> 
> 
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