[avrdude-dev] offset in flash when programming an .elf file

[Thomas Pircher]

Hi,

this is a follow-up from the AVRFreaks thread 
http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&p=468691

I run into trouble with avrdude when I try to flash an AT90USB647 with an .elf 
file:
| avrdude -cdragon_jtag -pusb647 -Pusb -F -e -Uflash:w:i2c.elf

As a result, I get the code offset by 116 bytes. When I read back the content 
of the Flash with AVRStudio, I get the following data:

| :100000007F454C4601010100000000000000000097 
| :100010000200530001000000000000003400000056 
| :10002000241C00008500000034002000020028008D 
| :1000300011000E000100000074000000000000002C 
| :1000400000000000A8020000A80200000500000057 
| :1000500001000000010000001C03000000018000FE 
| :100060000001800000000000060000000600000003 
| :10007000010000004BC0000064C0000062C000002E 
| ...

instead of the expected one:

| :100000004BC0000064C0000062C0000060C000007F 
| :100010005EC000005CC000005AC0000058C0000074 
| ...

Is this offset of 166 bytes expected?
When I program an .hex file, then everything is OK. 

I have no idea which version of avrdude I'm using. There is no --version 
option. Debian/sid reports the package version as 5.5-3.

Cheers,
Thomas


As a side note (nag):
I need to use the -F switch with the AT90USB647 because the avrdude config 
file has the right signature (0x1e9682) commented out and a wrong signature 
(0x1e9782) enabled.

-- 
pycrc -- a free CRC calculator and C source code generator
http://www.tty1.net/pycrc/