several elf files in flash

[Altera_Forum]

Hi all... 

How can I do to write several nios2 applications (elf files) sequentially in flash (without boot_copier) ? Is there a way to set a address where the programmer starts to write in flash? Thanks.

[Altera_Forum]

You should be able to use elf2flash and specify the offset using the --offset flag - just cat the files together and run use nios2-flash-programmer

[Altera_Forum]

--- Quote Start ---  originally posted by jdhar@Mar 29 2006, 07:47 PM you should be able to use elf2flash and specify the offset using the --offset flag - just cat the files together and run use nios2-flash-programmer <div align='right'><{post_snapback}> (index.php?act=findpost&pid=13905)  --- quote end ---    --- Quote End ---    Hello jdhar, thanks for your answer... The offset flag wasn&#39;t specified in the elf2flash help..... thanks... But I couldn&#39;t generate the flash without boot_loader... I want to write several applications in the flash, each one in determined address. My goal is to create a software that copy a determined application to exception area of a processor (there is 3 nios2) to be run. Therefore the boot_loader isn&#39;t necessary, but I don&#39;t know how to generate the .flash without it. Follow the command that Im using:  elf2flash --silent --input=myprogram --output=./myprogram.flash --sim_optimize=0 --base=0x00000000 --end=0x007fffff --reset=0x00000000 --boot=C:/altera/kits/nios2_51/components/altera_nios2/boot_loader_cfi.srec --ofset=0x00100000  It occurs an error without --boot tag.  Regards, Maikon.

[Altera_Forum]

Try relocate your elf to binary with nios2-elf-objcopy, then use bin2flash.

[Altera_Forum]

Hello... 

Thanks for your instructions... I followed them and I got the .flash without boot loader, but the size of final .flash file (elf=>bin=>flash) is greater that size of old flash file (elf => flash, with boot loader). I analyzed the two flash files and I could see that there were 65 words (32bits) whith 0x00000000 value in bin=>flash file. I think that nios2-elf-objcopy filled some section with 0, but I don&#39;t know what happened... Any idea? Thanks.

[Altera_Forum]

what is the result size? 

 Or try strip symbols, nios2-elf-strip apps nios2-elf-objcopy -O binary apps apps.bin

[Altera_Forum]

Hello... 

The difference between the file sizes (file_bin->flash - file_elf->flash) is 160 bytes. I tested 5 different examples, and there was the same result.  Follow the result of test with a program: (The blue area is the data to be writed in flash, the green word is the beginning of boot_loader code, and the red word is the beginning of program code).  [u][b]S012000068656C6C6F5F62696E2E666C61736805 S3250000000004FF7FEF7A3031004C0000C6260300C03A313100260100C004010006344000C6CB S32500000020045300C6170000C63A6800C000000000000000000000000000000000000000005E S3250000004000000000000000000000000000000000000000000000000000000000000000009A S3250000006000000000000000000000000000000000000000000000000000000000000000007A S3250000008000000000000000000000000000000000000000000000000000000000000000005A S325000000A000000000000000000000000000000000000000000000000000000000000000003A S325000000C000000000000000000000000000000000000000000000000000000000000000001A S325000000E00000000000000000000000000000000000000000000000000000000000000000FA S325000001000000000000000000000000000000000000000000000000000000000000000000D9 S3250000012000000000000000000000000000000000000000003480C0060400C0DE7440800663 S32500000140049383D67440400004AD6308744080000402B01026038008150000080401400884 ... </span>   In file_elf->flash, the first word (3A700100) is the first word of boot_loader too. The boot_loader part finishes before the red word (04FF7FEF), wich is the beginning of the program. In file_bin->flash is writed 11 words and the rest are zeros (528 zeros). After the zeros, two words is missing (orange words in file_elf->flash), and the remaining is the same for two files. I don&#39;t know why it writed these 528 zeros.  I tryed to use strip, but the result is the same like bin->flash...