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Altera_Forum's avatar
Altera_Forum
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18 years ago

Simulating a filter in Modelsim.

Hello,

I hope someone has been down the path I'm on and can shed some light on my problems.

I have been following the instructions found on: performing a functional simulation with the modelsim software.

(http://www.altera.com/support/software/nativelink/simulation/modelsim/eda_pro_msimfull_func_sim.html)

I am trying to simulate a firmware design incoporating a filter whose coeffecients are stored in an altsyncram component. I want to simulate my design using the coeffecients stored in my .mif file. Following the instructions cited above, I exported a .rif file. At this point, the instructions I get lost:confused: . My project is written in VHDL. I do not know what is meant by 'add the parameter LPM_FILE = "<memory>.rif" to the top level of your test bench or design file'. I have a number of other issues that take place after this particular hang up, but I don't think they are worth investgating until I know how exactly to make ModelSim know to find my coeffecient.rif file.

Thanks in advance.

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    18 years ago

    I don't know all possible options with memory initialisation files, I always used *.hex files (also declared with altsyncram instance respectively in Megawizard). The *.hex file had to be placed in ModelSim project top (where modelsim.ini is located). Always exciting, if ModelSim gets it all!

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    18 years ago

    Thank you for the hint of putting the file in the same directory as the .ini. I will be sure to do that. I am still confused as to the 'parameter LPM_FILE = "yaddayadda.rif"' or similar command that I need to add to my source in order for ModelSim to see it.