fifo megafunction simulation problem

[Altera_Forum]

hi there, 

 i'm new in fpga world and i just started playing with megafunctions, and already encountered problems.  i'm trying to adapt a working structure on xilinx to altera(the project isn't mine, i just have to adapt it to altera, so i can learn more about this job).   i'm using a module with different clocks for read and write, asynchronous reset, and only the rdempty signal. when i simulate the entire module, after inserting some data's, i try to read them, but the "q" signal is zzzzz :(   i also noticed that the rdempty signal is in a hi-z state.  i replaced the megafunction fifo with a manual made module, having the same properties(different clocks, rdempty signal) and it works properly.  Any ideas? please

[Altera_Forum]

--- Quote Start ---  hi there,  i'm new in fpga world and i just started playing with megafunctions, and already encountered problems.  i'm trying to adapt a working structure on xilinx to altera(the project isn't mine, i just have to adapt it to altera, so i can learn more about this job).   i'm using a module with different clocks for read and write, asynchronous reset, and only the rdempty signal. when i simulate the entire module, after inserting some data's, i try to read them, but the "q" signal is zzzzz :(   i also noticed that the rdempty signal is in a hi-z state.  i replaced the megafunction fifo with a manual made module, having the same properties(different clocks, rdempty signal) and it works properly.  Any ideas? please  --- Quote End ---   Did you fix your problem? I have similar problems since my q is also Z. Just to note, Altera-ModelSim only supports Altera's Megafuctions, if you are using any Xilinx IP on it, it will fail.

[Altera_Forum]

Hi, 

I'm using a .tcl file for simulating. To work, you'll have to add the altera_mf library to the simulation. I've used the following code line: vsim -L altera_mf -t ns work.test_fifo

[Altera_Forum]

--- Quote Start ---  Hi, I'm using a .tcl file for simulating. To work, you'll have to add the altera_mf library to the simulation. I've used the following code line: vsim -L altera_mf -t ns work.test_fifo   --- Quote End ---   I think I do add the altera_mf library.