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Altera_Forum's avatar
Altera_Forum
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9 years ago

printf broken after restart

Hey, I built a very simple project with only nios II/f on-chip memory and jtag uart. I created a basic hello world template. My hardware is the MAX 10 development kit. Everything works incl...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

Hello,

I do not have a Max10, but from my experience with DE0/DE2 the following ideas:

There are 2 ways to program your fpga:

- USB blaster (Quartus) directly in "RAM".

- SPI flash ("ROM"), during boot program loads into FPGA and then execution starts.

My experience is that sometimes SDRAM is not always empty after power down, this can be confusing, the FPGA can be empty but not the RAM.

From what i understand, your program ends up directly in FPGA, this is a volatile solution.

If you want it to work after boot you need to put it in flash.

Second: Nios II license is not free, Nios will not work if you use the free version of Quartus and the board does not "see" a "live" Quartus on your PC over JTAG.

Best Regards,

Johi.