pytec: init

This commit is contained in:
Astro 2020-09-29 02:52:46 +02:00
parent 87287e83b3
commit 97490e5e1b
5 changed files with 199 additions and 0 deletions

127
pytec/plot.py Normal file
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import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation
from threading import Thread, Lock
from pytec.client import Client
TIME_WINDOW = 300.0
class Series:
def __init__(self, scale=1.0):
self.scale = scale
self.x_data = []
self.y_data = []
def append(self, x, y):
self.x_data.append(x)
self.y_data.append(self.scale * y)
def clip(self, min_x):
drop = 0
while drop < len(self.x_data) and self.x_data[drop] < min_x:
drop += 1
self.x_data = self.x_data[drop:]
self.y_data = self.y_data[drop:]
series = {
'adc': Series(),
'sens': Series(0.0001),
'temperature': Series(),
'i_set': Series(),
'vref': Series(),
'dac_feedback': Series(),
'i_tec': Series(),
'tec_i': Series(),
'tec_u_meas': Series(),
}
series_lock = Lock()
quit = False
def recv_data(tec):
print("reporting")
for data in tec.report_mode():
if data['channel'] == 0:
series_lock.acquire()
try:
time = data['time'] / 1000.0
for k, s in series.iteritems():
v = data[k]
if data.has_key(k) and type(v) is float:
s.append(time, v)
finally:
series_lock.release()
if quit:
break
tec = Client()
print("connected")
thread = Thread(target=recv_data, args=(tec,))
thread.start()
fig, ax = plt.subplots()
for k, s in series.iteritems():
s.plot, = ax.plot([], [], label=k)
ax.legend()
def animate(i):
min_x, max_x, min_y, max_y = None, None, None, None
series_lock.acquire()
try:
for s in series.itervalues():
s.plot.set_data(s.x_data, s.y_data)
if len(s.x_data) > 0:
min_x_ = min(s.x_data)
if min_x is None:
min_x = min_x_
else:
min_x = min(min_x, min_x_)
max_x_ = max(s.x_data)
if max_x is None:
max_x = max_x_
else:
max_x = max(max_x, max_x_)
if len(s.y_data) > 0:
min_y_ = min(s.y_data)
if min_y is None:
min_y = min_y_
else:
min_y = min(min_y, min_y_)
max_y_ = max(s.y_data)
if max_y is None:
max_y = max_y_
else:
max_y = max(max_y, max_y_)
if min_x is not None and max_x - TIME_WINDOW > min_x:
for s in series.itervalues():
s.clip(max_x - TIME_WINDOW)
finally:
series_lock.release()
margin_y = 0.01 * (max_y - min_y)
ax.set_xlim(min_x, max_x)
ax.set_ylim(min_y - margin_y, max_y + margin_y)
ani = animation.FuncAnimation(
fig, animate, interval=1, blit=False, save_count=50)
# To save the animation, use e.g.
#
# ani.save("movie.mp4")
#
# or
#
# writer = animation.FFMpegWriter(
# fps=15, metadata=dict(artist='Me'), bitrate=1800)
# ani.save("movie.mp4", writer=writer)
print("show")
plt.show()
quit = True
thread.join()

0
pytec/pytec/__init__.py Normal file
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54
pytec/pytec/client.py Normal file
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import socket
import json
class Client:
def __init__(self, host="192.168.1.26", port=23, timeout=None):
self._socket = socket.create_connection((host, port), timeout)
self._lines = [""]
def _command(self, *command):
self._socket.sendall((" ".join(command) + "\n").encode('utf-8'))
def _read_line(self):
# read more lines
while len(self._lines) <= 1:
chunk = self._socket.recv(4096)
if not chunk:
return None
buf = self._lines[-1] + chunk.decode('utf-8', errors='ignore')
self._lines = buf.split("\n")
line = self._lines[0]
self._lines = self._lines[1:]
return line
def report_mode(self):
"""Start reporting measurement values
"""
self._command("report mode", "on")
self._read_line()
while True:
line = self._read_line()
if not line:
break
try:
yield json.loads(line)
except json.decoder.JSONDecodeError:
pass
def set_param(self, topic, channel, field="", value=""):
if type(value) is float:
value = "{:f}".format(value)
if type(value) is not str:
value = str(value)
self._command(topic, str(channel), field, value)
# read response line
self._read_line()
def power_up(self, channel, target):
self.set_param("pid", channel, "target", value=target)
self.set_param("pwm", channel, "pid")

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pytec/setup.py Normal file
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from setuptools import setup, find_packages
setup(
name="pytec",
version="0.0",
author="M-Labs",
url="https://git.m-labs.hk/M-Labs/thermostat",
description="Control TEC",
license="GPLv3",
install_requires=["setuptools"],
packages=find_packages(),
)

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pytec/test.py Normal file
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from pytec.client import Client
tec = Client() #(host="localhost", port=6667)
tec.set_param("s-h", 0, "t", 20)
for data in tec.report_mode():
print(data)