Re: [avr-chat] Where to see the original code of

[Weddington, Eric]

Answered off-list.

Eric

> -----Original Message-----
> From: Chen, Yuan Guang (Ex CH97) [mailto:address@hidden
> Sent: Wednesday, January 23, 2013 2:10 AM
> To: Weddington, Eric; address@hidden
> Cc: Yuanguang Chen (address@hidden)
> Subject: RE: [avr-chat] Where to see the original code of
> 
> Dear Eric
> 
> Need your help how to find further information in the avr-libc project
> site.
> 
> I know there are macro definition like below in the pgmspace.h
> document.
>               * #define __LPM_classic__(addr)
>               * #define __LPM_tiny__(addr)
>               * #define __LPM_enhanced__(addr)
>               * #define __LPM_word_classic__(addr)
>               * #define __LPM_word_tiny__(addr)
>               * #define __LPM_word_enhanced__(addr)
>               * #define __LPM_dword_classic__(addr)
>               * #define __LPM_dword_tiny__(addr)
>               * #define __LPM_dword_enhanced__(addr)
>               * #define __LPM_float_classic__(addr)
>               * #define __LPM_float_tiny__(addr)
>               * #define __LPM_float_enhanced__(addr)
>               * #define __LPM(addr) __LPM_classic__(addr)
> 
> 
> I also got from another site the information about the implementation
> of the macro "__LPM_classic__(addr)" , like this:
>               #define __LPM_classic__(addr)   \
> (__extension__({                \
>     uint16_t __addr16 = (uint16_t)(addr); \
>     uint8_t __result;           \
>     __asm__                     \
>     (                           \
>         "lpm" "\n\t"            \
>         "mov %0, r0" "\n\t"     \
>         : "=r" (__result)       \
>         : "z" (__addr16)        \
>         : "r0"                  \
>     );                          \
>     __result;                   \
> }))
> 
> 
> But problem is I try to find above detail implementation in the avr-
> libc project site, I can not locate.   Please inform normally how could
> I find the final detail implementation.   Or which document I shall
> read 1st to get the regulation.
> 
> And, in the new ATMEL STUDIO 6.0,  I can setup project for device
> xmega128b1 ,  and I can see the iox128b1.h is used in the project.  Why
> I can not locate this iox128b1.h file in the avr-libc project site?
> 
> Thank you very much
> Chen Yuanguang
> 
> 
> 
> 
> -----Original Message-----
> From: Weddington, Eric [mailto:address@hidden
> Sent: Friday, January 04, 2013 2:28 AM
> To: Chen, Yuan Guang (Ex CH97); address@hidden
> Subject: RE: [avr-chat] Where to see the original code of avr/common.h
> and avr.portpins.h
> 
> 
> > -----Original Message-----
> > From: address@hidden
> > [mailto:address@hidden On
> > Behalf Of Chen, Yuan Guang (Ex CH97)
> > Sent: Thursday, January 03, 2013 12:53 AM
> > To: address@hidden
> > Subject: [avr-chat] Where to see the original code of avr/common.h
> and
> > avr.portpins.h
> >
> > Dear
> >
> >
> >
> > I have tried to read docs , like in " http://www.nongnu.org/avr-
> > libc/user-manual/ " , though there are places mentioned the io.h
> > normally includes "common.h and portpins.h", I can not find the
> detail
> > of this 2 header docs.
> >
> >
> >
> > So I think I still not familiar with how to get information from
> > online resources.  Could you give a guide?
> 
> They are part of the avr-libc project:
> http://savannah.nongnu.org/projects/avr-libc