generate_simulate_meas_cost

import os
import ipdb # ipdb.set_trace()
import numpy as np
import matplotlib.pyplot as plt
import re

def generate_netlist(R2):
    cirfile="generated_netlist.net"
    f = open(cirfile,"w")
    f.write("* Generated Netlist \n")
    f.write("V1 N001 0 10 \n")
    f.write("R1 N001 out 10k \n")
    f.write("R2 out 0 %f \n" %R2)
    f.write(".tran 1s \n")
    f.write(".meas TRAN vsaida FIND V(out) at 1 \n")
    f.write(".end \n")
    f.close()


def meas_result():
    logfile="generated_netlist.log"
    with open(logfile) as f:
        lines = f.readlines()
    f.close()

    for l in lines:
        #print(l)
        if 'vsaida' in l:
            match =re.search(r"=(.*) at",l)
            vout = float(match.group(1))
            return vout

def simulate():
    os.system('ltspice -b generated_netlist.net')

def cost_function(x):
    #generate, simulate and read log
    generate_netlist(x)
    simulate()
    voltage = meas_result()

    #calculate cost
    cost = abs(5-voltage)
    return cost


cost = cost_function(1000)
print(cost)