On Fri, Jun 13, 2014 at 12:02:58PM +0530, Royce Pereira wrote: > Thanks, Joerg, > > This is news to me :) ! > > I googled for '__flash qualifier in AVR-GCC' and I understand that > using __flash eliminates the need for 'pgm_read_byte(&flashLocation)' > ?
It reads as many bytes as necessary. > > That is, you read it directly (like other ram variables), and avr gcc > will read it from flash automatically ? > Yes. And there's the __memx qualifier which lets you access both flash and RAM seamlessly. If you use the __flash<n> qualifiers to place data in flash, there's some linker script setup involved. Regards Senthil > > On Fri, Jun 13, 2014 at 11:19 AM, Joerg Wunsch <j...@uriah.heep.sax.de> wrote: > > Royce Pereira <royc...@gmail.com> wrote: > > > >> Even the libc documentation, which was once the bible of avr-gcc on > >> this is not accurate. The sample code just does not work. > > > > Apparently, nobody noticed before. Please, file a bug report > > to the avr-libc project, so we can fix that. > > > > The question here (as always) is whether you really want both, the > > strings itself as well as the pointers (table of it) in flash. The > > table is quite small, and could as well be kept in RAM unless you are > > very thight on RAM. > > > > As the compiler now understands the __flash qualifier, using that > > would make it a lot easier. > > -- > > cheers, Joerg .-.-. --... ...-- -.. . DL8DTL > > > > http://www.sax.de/~joerg/ > > Never trust an operating system you don't have sources for. ;-) > > > > _______________________________________________ > > AVR-GCC-list mailing list > > AVR-GCC-list@nongnu.org > > https://lists.nongnu.org/mailman/listinfo/avr-gcc-list > > > > -- > Best Regards, > > -- Royce Pereira > > _______________________________________________ > AVR-GCC-list mailing list > AVR-GCC-list@nongnu.org > https://lists.nongnu.org/mailman/listinfo/avr-gcc-list _______________________________________________ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org https://lists.nongnu.org/mailman/listinfo/avr-gcc-list
