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Eivind's avatar
Eivind
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1 year ago
Solved

.elf of updated build not downloading to Nios V from RiscFree

I have made a "hello world" project using Quartus lite23.1, RiscFree 24.3 on a Cyclone IV. The initial project works OK, but if i do an edit to the c soure file (hello world), the newly compiled elf...
Nios Cpu
  • Eivind's avatar
    Eivind
    1 year ago

    Thank You for Your reply.

    Things has made a weird turn to the better..

    I tried to recreate the situation before I did the edits in bsp_editor I mentioned in my previous post.

    I started bsp_editor, opened the settings.bsp-file, checked enable_alt_load and enable_alt_load_copy_rwdata and generated bsp_settings again.

    However, I did not get back to my previous situation. I was still in a situation where a reset would freeze the niosV, only a new run from RiscFree would get it running again.

    To get out of this situation, I tried to generate a new bsp rather than editing the old one.

    Voila:, everything works. If I edit the hello.c file, the newest version runs on then NIOS.

    I think I am now in the situation where the old proverb "If it aint broken, dont fix it" applies.

    We can consider this case closed.

    Unfortunately, when I regenerated the new setting.bsp the old one was overwritten, and it it thus not possible to compare working and non-working versions.

    Thank You again for Your help.

    Best regards

    Eivind

Eivind's avatar
Eivind
Icon for New Contributor rankNew Contributor
1 year ago

Thank You for Your reply.

I run the project om a DE2-115 evaluation board with Cyclone IVE. There is no flash memory so I assume I boot from OCRAM.

In Nios® V Embedded Processor Design Handbook I find:

Nios® V processor application execute in-place from On-chip Memory (OCRAM)OCRAMOCRAMEnable allow_code_at_reset in Advanced.hal.linker and uncheck other settings.Make sure all Linker Sections are set to OCRAM.

I checked Advanced.hal.linker in bsp-editor. In my system allow_code_at_reset was checked, but also enable_alt_load and enable_alt_load_copy_rwdata.

I unchecked enable_alt_load and enable_alt_load_copy_rwdata and generated bsp_settings again.

When I build the software project I now sometimes, but not always, get this waring:

warning: hallo.elf has a LOAD segment with RWX permissions

If i get this warning, the program will not run at all. Pressing reset button has no effect.

However, if I do not get this waring during compile, the program is running latest version of the .elf-file.

The drawback is that a reset from reset button makes the app stop executing, it will not restart, not even after repeated press to reset button. To get the program running again I need to do a "run" from RiscFree software.

Best regards

Eivind