Hi Graham, Just google for "Intel Hex Format", or better still, I always have it bookmarked for questions like these. :-) Go to the link below: http://www.precma.it/download/intelhex.pdf
Yes, the Intel Hex Format can handle cases where the code is greater than 64K. Look at the "Extended Segment Address Record". Eric > -----Original Message----- > From: > avr-gcc-list-bounces+eric.weddington=atmel....@nongnu.org > [mailto:avr-gcc-list-bounces+eric.weddington=atmel....@nongnu. > org] On Behalf Of Graham Davies > Sent: Thursday, May 06, 2010 12:35 PM > To: avr-gcc-list@nongnu.org > Subject: [avr-gcc-list] Format of HEX file when program > memory addressesexceed 64K > > I've spent over an hour looking for this information on the > Web and in the > WinAVR documentation but I can't find it so I'm asking for > some pointers. > > I'm using WinAVR-20081205 with AVRStudio 4.15, letting the > GCC plug-in do > all the heavy lifting (I'm not writing my own Makefiles or > link scripts or > anthing like that). The target is an ATmega1280, which is > significant to my > question because it has more than 64Kbytes of program memory. > The output > format is Intel HEX and I totally grok what I'm getting now > as my program > size is less than 64Kbytes. I even know where this is coming > from. The > generated Makefile uses 'avr-objcopy -O ihex' to get this. > > What I need to know is what the HEX file is going to look > like when my > program inevitably grows is size above 64Kbytes. What mechanism will > 'objcopy' use to get above sixteen address bits? I need to know this > exactly because I need to write a Flash loader to read such a file. > > I just need to know where to look for this information or > what to Google > for. > > Thanks, Graham. > > > > > _______________________________________________ > AVR-GCC-list mailing list > AVR-GCC-list@nongnu.org > http://lists.nongnu.org/mailman/listinfo/avr-gcc-list > _______________________________________________ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
