def simulation(sim_vec, targets, do_plot=False):
'''
perform a single simulation programatically.
@input: simulation_vector - a vector of all simulation variables
@return: a cost value related to the fitness function defined internally
'''
dv = {"Rbias1": str(sim_vec[0]),
"Rbias2": str(sim_vec[1]),
"Rfb": str(sim_vec[2])
}
open(TMP_CIRCUIT_FILE,"wt").write(template.safe_substitute(dv))
os.system("ngspice -b %s >/dev/null 2>/dev/null"%(TMP_CIRCUIT_FILE))
#os.system("ngspice -b %s "%(TMP_CIRCUIT_FILE))
p = spice_read.spice_read(RESULTS_FILE).get_plots()[0]
time = p.get_scalevector().get_data()
utp = p.get_datavector(2).get_data()[0]
ltp = p.get_datavector(3).get_data()[0]
results = {'utp': utp, 'ltp':ltp}
cost = fitness(results, targets)
#plot and print results
if do_plot:
print "Simulation Inputs"
print "Rbias1: %s; Rbias2: %s; Rfb: %s"%(str(sim_vec[0]), str(sim_vec[1]), str(sim_vec[2]))
print
print "Simulation Results"
print "Upper Trip Point: %sV"%(str(utp))
print "Lower Trip Point: %sV"%(str(ltp))
print
print "Cost: %s"%(str(cost))
vin = p.get_datavector(0)
vout = p.get_datavector(1)
plot(time, vin.get_data(), label=vin.name)
plot(time, vout.get_data(), label=vout.name)
text(0, 3.5, "Rbias1: %.2e"%(float(dv["Rbias1"])), bbox={'facecolor':'red', 'alpha':0.9})
text(0, 3.3, "Rbias2: %.2e"%(float(dv["Rbias2"])), bbox={'facecolor':'red', 'alpha':0.9})
text(0, 3.1, "Rfb: %.2e"%(float(dv["Rfb"])), bbox={'facecolor':'red', 'alpha':0.9})
text(0, 2.9, "UTP: %.2fV"%(float(results["utp"])), bbox={'facecolor':'blue', 'alpha':0.9},color='white')
text(0, 2.7, "LTP: %.2fV"%(float(results["ltp"])), bbox={'facecolor':'blue', 'alpha':0.9},color='white')
title("Schmitt Trigger Results")
grid()
legend()
savefig("./img/schmitt.trigger.atuogen.png")
close()
return cost
help="Spice DC margin vector")
parser.add_argument('-M', '--margin', type=str,
help="Spice margin vector")
parser.add_argument('-S', '--start', default='0', type=str,
help="Simulation start time")
parser.add_argument('-n', '--number', default=10, type=int,
help="Number of violations to print (-1 for all)")
violations = dict()
slacks = dict()
worst = dict()
args = parser.parse_args()
vectors = spice_read.spice_read(args.input).get_plots()[0]
if args.violation:
violations["Spec"] = []
violation = get_vector(vectors, args.violation)
time_vector = vectors.get_scalevector().get_data()
rising_clock = None
falling_clock = None
if args.rising:
rising_clock = get_vector(vectors, args.rising)
if args.falling or args.both:
raise Exception("Specify only one clock")
elif args.falling:
falling_clock = get_vector(vectors, args.falling)
options['verbose'] = True
elif k in ('-o', '--outfile'):
options['outfile'] = v
elif k in ('-p', '--pathprefix'):
options['pathprefix'] = v
elif k in ('-f', '--format'):
if v not in FORMAT_OPTIONS:
usage()
sys.exit(2)
options['format'] = v
## now execute the commands
args.sort()
for infile in args:
filename = os.path.basename(infile)
plots = spice_read.spice_read(infile).get_plots()
path = options['pathprefix']
if len(args) > 1:
## need to add the filename as path
path = path + '/' + filename
if len(plots) > 1:
## need to add a plot number to the path
for i, p in enumerate(plots):
insert_spiceplot(p, path=path, name="plot_%i"%i,
outfile=options['outfile'], format=options['format'])
else:
toks = path.split('/')
if len(toks) == 2:
path = '/'
else:
def __parse_file(infile):
plots = spice_read.spice_read(infile).get_plots()
return __read_spiceplot(plots[0])
options['verbose'] = True
elif k in ('-o', '--outfile'):
options['outfile'] = v
elif k in ('-p', '--pathprefix'):
options['pathprefix'] = v
elif k in ('-f', '--format'):
if v not in FORMAT_OPTIONS:
usage()
sys.exit(2)
options['format'] = v
## now execute the commands
args.sort()
for infile in args:
filename = os.path.basename(infile)
plots = spice_read.spice_read(infile).get_plots()
path = options['pathprefix']
if len(args) > 1:
## need to add the filename as path
path = path + '/' + filename
if len(plots) > 1:
## need to add a plot number to the path
for i, p in enumerate(plots):
insert_spiceplot(p,
path=path,
name="plot_%i" % i,
outfile=options['outfile'],
format=options['format'])
else:
toks = path.split('/')
