Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Downloading ELF Process failed!

I am running NiosII IDE on my windows 7 professional laptop. When I first create a sopc project and complie and download *.sof into target board, then I also create a demo NiosII project "Hello world...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Thank you so much for your reply, Slacker. I appreciate that.

Yes I did add cpu_0 and cpu_1 intentionally because I want to play 2 cores at the same time later. I did select with Eclipse from the time creating new project in C and when run as configuration, but the ELF loading still failed. Even when I deleted cpu_1 and juart_1, run as above and got same error.

Notice that with the same sopc file I could see "hello world" with another version of board (unwanted version). So I believe the problem is in the hardware of the FPGA. but not sure what kind of things may happen? I checked very carefully the scheme. could not find yet.

As I read, people talked much about clk and reset_n, but even with reset_n of onchip mem connected to Vcc it still worked with unwanted version board.

another clue, the main difference vs. the worked board is :

the init_done, config_done, nstatus n_config are pulled up to 3.3V with 10K (supposed to be right) all VCCD_PLL to 1.2V instead of 2.5 V (should be right too) many IO pins are set free instead of mislabled and connected to GND or VCCINT.

It's so funny that the version with many mistakes worked and the corrected one does not work.

Please suggest me something to investigate more.