Jtag uart output to a file?

Question

Hi all,

Is it possible to print or write the output of a jtag uart to a text file in pc? I had read that altera zip read only host system require flash memory but I dont want to use flash. My main problem is trying to write a data from memory to a text file to read because using printf to view it is deem inefficient according to other threads. So I am thinking of using jtag uart mount point to divert the output to a text file. Or are there any way to define mount point in pc instead of flash?

altera_forum · Answer

I normally use this when I want Nios II to access files on my PC:  http://www.nioswiki.com/exampledesigns/hostfilesystem?gsa_pos=4&amp;wt.oss_r=1&amp;wt.oss=host%20filing%20system

altera_forum · Answer

One obvious solution is to launch the nios2-terminal and redirect it's standard output to a file.

I do wonder what you'll be gaining with a filesystem as far as efficiency. It sounds like you'll still be using printf statements so you'll suffer the overhead of that function regardless. You'll still be using the jtag uart to pass the data to the PC which is inherently slow.

You can always use Altera host-based filesystem which creates a filesystem accessible to the NIOS via JTAG if that's what you're looking for. See page 6-15 of the following:

http://www.altera.com/literature/hb/nios2/n2sw_nii5v2_02.pdf

Jake

altera_forum · Answer

Thans Jakobjones and Badomen. I completely miss the 6-16 Hal host based file system. Iread only about zip host based file system. Thanks.

altera_forum · Answer

You are welcome.  I recommend checking out system console as well, it might be useful for what you are trying to do:  http://www.altera.com/literature/ug/ug_system_console.pdf

Forum Discussion

Jtag uart output to a file?

4 Replies

Recent Discussions

Nios V/c interrupt controller

NIOS2 filesystem support

NIOS does not start after SW download (timing issue?)

Error creating Nios II Application and BSP from Template

eCoS OS throws execption when freeing memory