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nios II signals

Altera_Forum
Honored Contributor II
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hi everybody, 

I have created a sopc builder project which connects my custom logic to nios II processor. I have created simulation file and run simulation. Everything is correct but i am not able to understand nios II signals in modelsim waveform and their values that are automatically generated. There are 2 types of signals in cpu_0. 

 

starting with i 

i_readdata 

i_address 

i_read. 

etc 

 

starting with d 

d_readdata 

d_address 

d_writedata. 

etc 

 

The d_writedata is coming always 0 in the simulation. Is this the avalon writedata signal that will go to my custom slave through avalon switch interconnect and where did the code for this interconnect logic resides? I am not able to understand these signals and their values. 

Is there any guide which describes these signals? 

 

another thing is that when i run simulation by clicking run_simulator in sopc,there are options for compiling but there is no option to run. I have done it manually by run -all. Is this correct method 

 

 

Regards 

Pankaj
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