Downloading program to Nios

Before downloading the srec, make sure that you have programmed the FPGA device on the board using the programming file generated by Quartus.

Hope this helps.

- Subroto Datta Altera Corp.

Dear Subroto,

Do u mean the .sof file?

if you meant the .sof file, yes I did download it to the stratix chip before running the .srec!

Thank you, john

Before downloading type in:

nr -t

Enter a view times to see if NIOS dumps memory. If nothing happens check you port/cable. Make sure the pins are correctly connected to the Rx and TX via your FPGA.

Did you successfully downloaded a program before?

Looking at your 1st post it seems that if was actually downloading. If it downloads and then stops/terminates then your program is crashing. Are you compiling standard examples on the dev. board or have you modified your hello_nios.c or running on your own board? One of the main problems I have found was a dry joint/ missing pin on one of the addr/data lines. The program downloads , but the memory is only receiving garbage. After completion the Go command sends it to the execution point where it basically runs random code. To verify this make sure you can do the 'nr -t' thing. If you can then check your target memory e.g. 0x1000000 with "m1000000". If it dumps memory then try and change it e.g. "m1000000:1234". Recheck the memory with "m1000000" to verify that the memory is writeable and that the correct data is stored. Also make sure that the next memory word is not altered (very common).

Good luck

Victor

thx Victor, it is working now.

Best regards, John