sample.py

from PyMTI import *
import subprocess

vcd_name = "ring4bd2.vcd"
save_name = "ring4bd2.svg"
do_name = "helloworld.do"
save_title = "Sample Timing Model"

do_file_content = """
##################################
# A very simple modelsim do file #
##################################

# 1) Create a library for working in
vlib work

# 2) Compile the half adder
#vcom -93 -explicit -work work HalfAdder.vhd

# 2) Compile the half adder
vlog  ring4bd.v
vlog  ring4bd_test.v

# 3) Load it for simulation
vsim ring4bd_test

# 4) Open some selected windows for viewing
view structure
view signals
view wave

# 5) Show some of the signals in the wave window
add wave -noupdate -divider -height 32 Inputs
add wave -noupdate mode
add wave -noupdate clock
add wave -noupdate reset
add wave -noupdate -divider -height 32 Outputs
add wave -noupdate count

# 6) Set some test patterns

# a = 0, b = 0 at 0 ns
#force a 0 0
#force b 0 0

# a = 1, b = 0 at 10 ns
#force a 1 10

# a = 0, b = 1 at 20 ns
#force a 0 20
#force b 1 20

# a = 1, b = 1 at 30 ns
#force a 1 30

# 7) Run the simulation for 40 ns
run 3600
quit -f
"""

with open(do_name, "w") as file:
    file.write(do_file_content)

subprocess.run(["vsim", "-c", "-do", "helloworld.do"])

signals = (
           ("ring4bd_test.mode", "mode"),
           ("ring4bd_test.clock", "Clock"),
           ("ring4bd_test.reset", "Reset"),
           ("ring4bd_test.count[3]", "count[3]"),
           ("ring4bd_test.count[2]", "count[2]"),
           ("ring4bd_test.count[1]", "count[1]"),
           ("ring4bd_test.count[0]", "count[0]"),
          )
analog_signal = ("ring4bd_test.dut.clock","Analog Signal")


plot(vcd_name, save_name, save_title, signals, analog_signal)