Add draft fft pyqtgui, update template with egu, edit gitignore.

.gitignore

@@ -14,3 +14,4 @@ core.*
 *PVs.list
 *-loc/*.Makefile
 ecmcPlugin_Simple-loc/*.Makefile
+*__*

ecmcPlugin_FFT-loc/ecmcPlugin_FFTApp/Db/ecmcPluginFFT.template

@@ -57,12 +57,14 @@ record(waveform,"$(P)Plugin-FFT${INDEX}-Spectrum-Amp-Act"){
   field(NELM, "$(NELM)")
   field(SCAN, "I/O Intr")
   field(TSE,  "0")
+  field(EGU,  "${AMP_EGU= }")
 }
 
 # FFT xaxis
 record(waveform,"$(P)Plugin-FFT${INDEX}-Spectrum-X-Axis-Act"){
   info(asyn:FIFO, "1000")
-  field(DESC, "Raw data")
+  field(DESC, "X-Axis data")
+  field(EGU,  "Hz")
   field(PINI, "1")
   field(DTYP, "asynFloat64ArrayIn")
   field(INP,  "@asyn(PLUGIN.FFT${INDEX},$(ADDR=0),$(TIMEOUT=1000))plugin.fft${INDEX}.fftxaxis")

tools/ecmcFFTGui.py

@@ -0,0 +1,181 @@
+#*************************************************************************
+# Copyright (c) 2020 European Spallation Source ERIC
+# ecmc is distributed subject to a Software License Agreement found
+# in file LICENSE that is included with this distribution. 
+#
+#   ecmcFFTGui.py
+#
+#  Created on: October 6, 2020
+#      Author: Anders Sandström
+#    
+#  Heavily inspired by: https://exceptionshub.com/real-time-plotting-in-while-loop-with-matplotlib.html
+#
+#  Extends the ecmcTrend class will epics pv callbacks
+#  
+#*************************************************************************
+
+import sys
+import os
+import epics
+from PyQt5.QtWidgets import *
+from PyQt5 import QtWidgets
+from PyQt5.QtCore import *
+from PyQt5.QtGui import *
+import functools
+import numpy as np
+import random as rd
+import matplotlib
+matplotlib.use("Qt5Agg")
+from matplotlib.figure import Figure
+from matplotlib.animation import TimedAnimation
+from matplotlib.lines import Line2D
+from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
+from matplotlib.backends.backend_qt5agg import NavigationToolbar2QT as NavigationToolbar
+import matplotlib.pyplot as plt 
+
+import time
+import threading
+
+
+class comSignal(QObject):
+    data_signal = pyqtSignal(object)
+
+class ecmcFFTGui(QtWidgets.QDialog):
+    def __init__(self,pvName=None):        
+        super(ecmcFFTGui, self).__init__()        
+        self.comSignalX = comSignal()        
+        self.comSignalX.data_signal.connect(self.callbackFuncX)
+        self.comSignalY = comSignal()        
+        self.comSignalY.data_signal.connect(self.callbackFuncY)
+        self.pause = 0
+        self.spectX = np.zeros(0)
+        self.spectY = np.zeros(0)        
+        self.figure = plt.figure()            
+        # this is the Canvas Widget that  
+        # displays the 'figure'it takes the 
+        # 'figure' instance as a parameter to __init__ 
+        self.canvas = FigureCanvas(self.figure) 
+   
+        # this is the Navigation widget 
+        # it takes the Canvas widget and a parent 
+        self.toolbar = NavigationToolbar(self.canvas, self) 
+
+        # Pause
+        self.pauseBtn = QPushButton(text = 'pause')
+        self.pauseBtn.setFixedSize(100, 50)
+        self.pauseBtn.clicked.connect(self.pauseBtnAction)        
+        self.pauseBtn.setStyleSheet("background-color: green");
+
+        self.startval = 0
+        self.pvNameY = "IOC_TEST:Plugin-FFT1-Spectrum-Amp-Act"
+        self.pvNameX = "IOC_TEST:Plugin-FFT1-Spectrum-X-Axis-Act"
+        self.connectPvs() # Epics
+        self.setTitle()
+
+        # Define the geometry of the main window
+        self.setGeometry(300, 300, 900, 700)
+        self.setWindowTitle("ecmc plot")
+
+        # creating a Vertical Box layout 
+        layout = QVBoxLayout() 
+           
+        # adding tool bar to the layout 
+        layout.addWidget(self.toolbar) 
+           
+        # adding canvas to the layout 
+        layout.addWidget(self.canvas) 
+           
+        # adding push button to the layout 
+        layout.addWidget(self.pauseBtn) 
+           
+        # setting layout to the main window 
+        self.setLayout(layout)                
+        return
+
+    def connectPvs(self):        
+
+        if self.pvNameX is None:            
+            raise RuntimeError("pvname X must not be 'None'")
+        if len(self.pvNameX)==0:
+            raise RuntimeError("pvname  X must not be ''")
+
+        if self.pvNameY is None:            
+            raise RuntimeError("pvname y must not be 'None'")
+        if len(self.pvNameY)==0:
+            raise RuntimeError("pvname  y must not be ''")
+
+        self.pvX = epics.PV(self.pvNameX)
+
+        self.pvY = epics.PV(self.pvNameY)
+        
+        self.pvX.add_callback(self.onChangePvX)
+        self.pvY.add_callback(self.onChangePvY)
+        #self.myFig.addData(self.startval)        
+        QCoreApplication.processEvents()
+    
+    def onChangePvX(self,pvname=None, value=None, char_value=None,timestamp=None, **kw):
+        #print ('PV X Changed! ', pvname, char_value, time.ctime())
+        self.comSignalX.data_signal.emit(value)
+
+    def onChangePvY(self,pvname=None, value=None, char_value=None,timestamp=None, **kw):
+        #print ('PV Y Changed! ', pvname, char_value, time.ctime())
+        self.comSignalY.data_signal.emit(value)        
+
+    def pauseBtnAction(self):        
+        self.pause = not self.pause
+        if self.pause:
+            self.pauseBtn.setStyleSheet("background-color: red");
+        else:
+            self.pauseBtn.setStyleSheet("background-color: green");
+
+        return
+
+
+    def callbackFuncX(self, value):
+        #print ('Callback X: ' + str(np.size(value)) )# + value )
+        if(np.size(value)) > 0:
+            self.spectX = value
+        return
+
+    def callbackFuncY(self, value):
+        #print ('Callback y: ')# + value )
+        if(np.size(value)) > 0:
+            self.spectY = value
+            self.plotSpect()
+        return
+
+    def setYLabel(self,label):
+        #self.myFig.setYLabel(label)
+        return
+
+    def setTitle(self):
+        #self.myFig.setTitle(label)
+        self.setWindowTitle("ecmc plot: " + self.pvNameY + ' vs ' + self.pvNameX)
+        return
+
+    def plotSpect(self):
+        if self.pause:
+            print('paused!!!!')
+            return
+
+        print('plotSpect!!!!')
+        
+        # clearing old figure 
+        self.figure.clear() 
+   
+        # create an axis 
+        ax = self.figure.add_subplot(111)        
+
+        # plot data 
+        ax.plot(self.spectX,self.spectY , '*-') 
+        ax.grid()
+        # refresh canvas 
+        self.canvas.draw() 
+
+
+if __name__ == "__main__":
+    import sys
+    app = QtWidgets.QApplication(sys.argv)
+    window=ecmcFFTGui();
+    window.show()
+    sys.exit(app.exec_())