plot both channel temperatures

pytec/tecQT.py

@@ -0,0 +1,86 @@
+from pyqtgraph.Qt import QtGui, QtCore
+import numpy as np
+import pyqtgraph as pg
+from pytec.client import Client
+
+rec_len = 1000
+refresh_period = 20
+
+channel_data = [{
+    'adc': np.zeros(rec_len),
+    'sens': np.zeros(rec_len),
+    'temperature': np.zeros(rec_len),
+    'i_set': np.zeros(rec_len),
+    'pid_output': np.zeros(rec_len),
+    'vref': np.zeros(rec_len),
+    'dac_value': np.zeros(rec_len),
+    'dac_feedback': np.zeros(rec_len),
+    'i_tec': np.zeros(rec_len),
+    'tec_i': np.zeros(rec_len),
+    'tec_u_meas': np.zeros(rec_len),
+    'interval': np.zeros(rec_len),
+    'temp_set': np.zeros(rec_len),
+} for _ in range(2)]
+
+tec = Client()
+
+app = pg.mkQApp()
+mw = QtGui.QMainWindow()
+mw.setWindowTitle('Thermostat Control Panel')
+mw.resize(800,800)
+cw = QtGui.QWidget()
+mw.setCentralWidget(cw)
+l = QtGui.QVBoxLayout()
+cw.setLayout(l)
+
+pg.setConfigOptions(antialias=True)
+
+pw0= pg.PlotWidget(name='Channel 0')
+l.addWidget(pw0)
+pw1 = pg.PlotWidget(name='Channel 1')
+l.addWidget(pw1)
+
+curve0 = pw0.plot()
+curve1 = pw1.plot()
+
+cnt = 0
+time_stamp = np.zeros(rec_len)
+def update(n):
+    global cnt
+    for data in tec.report_mode():
+        ch = data[n]        
+        for tag, seq in channel_data[n].items():
+            if tag in ch:
+                v = ch[tag]
+                if type(v) is float:
+                    if cnt == 0:
+                        np.copyto(seq, np.full(rec_len, v))
+                    else:
+                        seq[:-1] = seq[1:]  
+                        seq[-1] = v        
+        if quit:
+            break
+    return
+
+def updateData():
+    global cnt
+    update(0)
+    update(1)
+    cnt += 1
+    time_stamp[:-1] = time_stamp[1:]
+    time_stamp[-1] = cnt * refresh_period / 1000
+    pw0.setRange(xRange=[cnt * refresh_period / 1000 - 20.0, cnt * refresh_period / 1000])
+    pw1.setRange(xRange=[cnt * refresh_period / 1000 - 20.0, cnt * refresh_period / 1000])    
+    curve0.setData(x = time_stamp, y = channel_data[0]['temperature'])
+    curve1.setData(x = time_stamp, y = channel_data[1]['temperature'])
+    
+
+## Start a timer to rapidly update the plot in pw
+t = QtCore.QTimer()
+t.timeout.connect(updateData)
+t.start(refresh_period)
+
+mw.show()
+
+if __name__ == '__main__':
+    pg.exec()