Simulation

Preparing for Simulation

cocotb

Download and extract cocotb. Export cocotb path:

export COCOTB=/path/to/cocotb

Icarus Verilog

Install Icarus Verilog via package manager (Ubuntu strongly recommended):

sudo add-apt-repository -y ppa:team-electronics/ppa
sudo apt-get update
sudo apt-get install iverilog-daily

GTKWave

Install GTKWave via package manager:

sudo apt-get install gtkwave

XILINX Unisims

Export path to folder containing unisims folder (Xilinx Simulation Library):

export XILINX=/path/to/folder/containing/unisims/folder

Generating sim.vvp from Latest Firmware

Cd into firmware/mio/cosim and run:

make -f Makefile results.xml

Zip the sim_build directory and and move the sim_build.zip into tests/test_interface.

Running the Simulation

Starting the Simulation

Cd into tests and run:

python test_interface.py

Waveforms

Opening waveform with:

gtkwave tb.vcd

http://gtkwave.sourceforge.net

Q&A

1. Q: The following error occurs:
   vvp: symbol lookup error: /home/jens/miniconda/lib/libreadline.so.6: undefined symbol: PC
    
   A: Uninstall readline package:
   

   conda uninstall readline

   or remove library:
   

   rm -f /path/to/miniconda/envs/test-environment/lib/libreadline.so.6