def main():
# clock instances
ptp_clocks = []
ptp_clocks.append(PtpClock(SLAVE_1_NAME, SLAVE_1_MAC, 'b'))
# connect to a remote host where ptp4l is running, slave or master to
# reach the ptp management channel
server = Server(1, SERVER_USER, SERVER_PWD, SERVER_IP)
server.connect()
# interactive plot mode with labeled axis and legend
fig, offset_graph = plt.subplots()
path_delay_graph = offset_graph.twinx()
for clk in ptp_clocks:
offset_graph.plot(range(len(clk.offset_buffer)),
clk.offset_buffer,
"".join([clk.color, "-"]),
label=" ".join([clk.name, "offset"]))
path_delay_graph.plot(range(len(clk.mean_path_delay_buffer)),
clk.mean_path_delay_buffer,
"".join([clk.color, "."]),
label=" ".join([clk.name, "path delay"]))
offset_graph.legend(loc='upper left', shadow=True)
path_delay_graph.legend(loc='upper right', shadow=True)
offset_graph.set_xlabel("samples")
offset_graph.set_ylabel("master offset (ns)")
path_delay_graph.set_ylabel("mean path delay (ns)")
for i in range(N):
measurement_list = get_ptp_stat(server)
for clk in ptp_clocks:
clk.set_default_values()
# parse incoming data from pmc
iterator = iter(measurement_list)
for c, n, o, p in zip(iterator, iterator, iterator, iterator):
mac = c.split('-')[0]
offset = re.sub('offsetFromMaster +', '', o)
path_delay = re.sub('meanPathDelay +', '', p)
if mac == clk.mac:
clk.put_values(float(offset), float(path_delay))
# append buffers and plot
clk.update_buffers()
offset_graph.plot(range(len(clk.offset_buffer)),
clk.offset_buffer,
clk.color + "-",
label=clk.name + " offset")
offset_graph.autoscale(True, 'both', True)
path_delay_graph.plot(range(len(clk.mean_path_delay_buffer)),
clk.mean_path_delay_buffer,
clk.color + ".",
label=clk.name)
plt.pause(1)
plt.show()
