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originally posted by alessandro@Dec 21 2005, 01:02 PM
i'm running niosii v.5.0 with quartusii v.5.0 on my windows 2000 machine. the
installation of both packages was ok. i have built a .elf file containing my application (without use of niosii ide) and i want to debug it using insight (gdb)
from the cygwin command line. i run insight using the following command:
nios2-debug --cable=usb-blaster <myapplicationfile.elf>
on the console screen i see no error messages and my application is downloaded
into hardware memory. i'm able to see the first two lines of my application. the
problem is concerning the commands to run the application. no commands work
and, if i try to type the commands on the gdb console, gdb doesn't reply also
when i type wrong commands. it seems gdb is not running
please, can you help me ?
best regards
/alessandro
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If I remember correctly, nios2-debug is a vestige of the 'legacy SDK' -- are you using that?
As an alternative I would suggest the direct approach - this is an excerpt from our eCos for Nios II document that describes loading & debugging via insight; there is nothing magical about an eCos .elf from one you create, so this should in theory work for you as well. Granted, there may be some tweaking required:
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8.2 JTAG debug using Insight
To debug an application using nios2-elf-insight, you should first launch nios2-gdb-server to establish a JTAG connection to the board. This is done by running the following command from within an SDK shell:
> nios2-gdb-server –-tcpport=2343 &
To debug an application named “hello” in the current directory, you should then run:
> nios2-elf-insight hello
This will launch the insight debug interface. To connect to the board, open the GDB console by selecting “Console” from the “view” menu. Then type the following commands:
> target remote :2343
> load
> break main
> jump *_start
This will: establish a connection to the target; download the executable; set a breakpoint at main; and then begin execution.
You can use these same commands when using nios2-elf-gdb in place of nios2-elf-insight.
From here, it is then possible to step, break, continue etc. You can find further information the Insight online help (select “help” at the top of the Insight window).[/b]
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Note that the above example assumes that "hello" is an .elf file... just without any .elf file extension.
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