Quartus Mif File Update My NIOS2

Quartus Mif File Update My NIOS2

I used to update my NIOS2 onchip rom (containing the Nios program) via the quartuscdb --updatemif quartusasm procedure.

I took a project, that I initially developed with Quartus 11.1 under Windows, and opened it under Quartus 11.1 under Linux.

It worked quiet well, except the fact that my onchiprom initilisation somehow didnt worked.

Once I downloaded the elf file from which I converted the hex file for rom initialization, the processor started and worked fine.

So I went back to the Windows Quartus 11.1, and opened the project.

Of course, I have to adjust some paths in order to get from the Linux file system to the Windows file system.

However, if I now try to use quartuscdb --updatemif, it always tells me, that it does not find the onchip rom hex file and tells me thta it cannot locate the path.

I looked at all the file references in qsys and in the Quartus files and find not a single Linux path anymore.

My query is How can I use this mif file to initialize a variable in my top level design architecture.

Let me elaborate.

My aim is to produce a sine wave using FPGA storing the values in look up tables and accessing it from a VHDL program.

Now I think I should write a program that takes in these LUT values and feed it to the DAC.

I will then assign the values to an output vector variable(should it be a two dimensional array) and then use the DAC.

You have to be confident that your code is indeed interpreted as a ROM by altera, otherwise the attribute will be ignored.

It requires use ieee.mathreal.all and use ieee.numericstd.all to work.

The advantage of this solution is that it also works in simulation, while the attribute would not.

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