396 lines
19 KiB
Python
396 lines
19 KiB
Python
from PyQt6.QtGui import *
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from PyQt6.QtWidgets import *
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from PyQt6.QtCore import *
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import multiprocessing
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import multiprocessing.managers
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import time
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import traceback,sys,os
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import numpy as np
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import pyqtgraph as pg
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import import_txt
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# Get the current script's directory
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current_dir = os.path.dirname(os.path.abspath(__file__))
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# Get the parent directory by going one level up
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parent_dir = os.path.dirname(current_dir)
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# Add the parent directory to sys.path
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sys.path.append(parent_dir)
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from drivers import BK_9174B
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from design_files.BK_9174B_design import Ui_MainWindow
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class WorkerSignals(QObject):
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'''
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Defines the signals available from a running worker thread.
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Supported signals are:
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finished: No data
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error: tuple (exctype, value, traceback.format_exc() )
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result: object data returned from processing, anything
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progress: int indicating % progress
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'''
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finished = pyqtSignal()
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error = pyqtSignal(tuple)
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result = pyqtSignal(object)
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progress = pyqtSignal(list)
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class Worker(QRunnable):
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'''
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Worker thread
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Inherits from QRunnable to handler worker thread setup, signals and wrap-up.
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:param callback: The function callback to run on this worker thread. Supplied args and
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kwargs will be passed through to the runner.
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:type callback: function
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:param args: Arguments to pass to the callback function
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:param kwargs: Keywords to pass to the callback function
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'''
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def __init__(self, fn, *args, **kwargs):
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super(Worker, self).__init__()
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# Store constructor arguments (re-used for processing)
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self.fn = fn
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self.args = args
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self.kwargs = kwargs
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self.signals = WorkerSignals()
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# Add the callback to our kwargs
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self.kwargs['progress_callback'] = self.signals.progress
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@pyqtSlot()
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def run(self):
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'''
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Initialise the runner function with passed args, kwargs.
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'''
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# Retrieve args/kwargs here; and fire processing using them
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try:
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result = self.fn(*self.args, **self.kwargs)
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except:
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traceback.print_exc()
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exctype, value = sys.exc_info()[:2]
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self.signals.error.emit((exctype, value, traceback.format_exc()))
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else:
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self.signals.result.emit(result) # Return the result of the processing
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finally:
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self.signals.finished.emit() # Done
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def get_float(Qline,default = 0): #gets value from QLineEdit and converts it to float. If text is empty or cannot be converted, it returns "default" which is 0, if not specified
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try:
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out = float(Qline.text())
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except:
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out = default
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return(out)
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class MainWindow(QMainWindow, Ui_MainWindow):
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def __init__(self, *args, **kwargs):
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# Get the current script's directory
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self.current_dir = os.path.dirname(os.path.abspath(__file__))
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# Get the parent directory by going one level up
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self.parent_dir = os.path.dirname(current_dir)
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#establish connection to global variables
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try: #try to connect to global variables
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manager = multiprocessing.managers.BaseManager(address=('localhost',5001), authkey=b'')
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manager.connect()
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manager.register('sync_BK_9174B_2')
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self.sync_BK_9174B = manager.sync_BK_9174B_2()
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except: #open global variables, if no connection can be made (i.e. it is not running). Then connect to it
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# subprocess.call(['D:\\Python instrument drivers\\env\\Scripts\\python.exe', 'D:\\Python instrument drivers\\StandAlones\\global_variables.py'])
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self.global_vars = QProcess()
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self.global_vars.start(self.current_dir+"\\env\\Scripts\\python.exe", [self.current_dir+'\\global_variables.py'])
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manager.connect()
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manager.register('sync_BK_9174B_2')
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self.sync_BK_9174B = manager.sync_BK_9174B_2()
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print('!!!\nI opened global variables myself. If you close me, global variables will shut down too. Consider starting global variables in own instance for more security\n!!!')
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#fill in variables, if they are not defined in global variables
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self.sync_BK_9174B.update({'setU':[0,0], 'setI':[0,0], 'OutputOn':[False, False], 'U':[0,0], 'I':[0,0], 'P':[0,0]})
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#import Gui from QT designer file
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super(MainWindow, self).__init__(*args, **kwargs)
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self.setupUi(self)
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self.label_device.setText('Device 2') #change label to "device 2" to indicate which device is controlled
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#setup plot
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self.graphWidget.setBackground('w')
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self.graphWidget.setTitle("Voltage, Current, Power")
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self.graphWidget.setLabel('left', 'Voltage [V], Current [A], Power [W]')
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self.graphWidget.setLabel('bottom', 'Time (H)')
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axis = pg.DateAxisItem()
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self.graphWidget.setAxisItems({'bottom':axis})
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temp = [time.time(),time.time()-1]
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pen1 = pg.mkPen(color=(255, 0, 0), width=2)
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pen2 = pg.mkPen(color=(0, 0, 255), width=2)
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pen3 = pg.mkPen(color=(0, 255, 0), width=2)
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pen4 = pg.mkPen(color=(255, 255, 0), width=2)
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pen5 = pg.mkPen(color=(255, 0, 255), width=2)
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pen6 = pg.mkPen(color=(0, 255, 255), width=2)
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self.plot_1 = self.graphWidget.plot(temp,[1,0],pen = pen1, name = 'V Ch: 1')
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self.plot_2 = self.graphWidget.plot(temp,[1,0],pen = pen2, name = 'I Ch: 1')
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self.plot_3 = self.graphWidget.plot(temp,[1,0],pen = pen3, name = 'P Ch: 1')
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self.plot_4 = self.graphWidget.plot(temp,[1,0],pen = pen4, name = 'V Ch: 2')
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self.plot_5 = self.graphWidget.plot(temp,[1,0],pen = pen5, name = 'I Ch: 2')
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self.plot_6 = self.graphWidget.plot(temp,[1,0],pen = pen6, name = 'P Ch: 2')
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self.graphWidget.addLegend()
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#set up pyQT threadpool
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self.threadpool = QThreadPool()
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#define and standard threads.
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worker_save = Worker(self.save)
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self.threadpool.start(worker_save)
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#define signals and slots
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self.actionSet_default.triggered.connect(self.set_default)
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self.actionReset_default.triggered.connect(self.read_default)
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self.button_connect.clicked.connect(self.start_meas)
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self.line_Nplot.editingFinished.connect(self.set_Npoints)
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self.line_saveInterval.editingFinished.connect(self.change_timing)
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self.checkBox_disableplots.stateChanged.connect(self.set_displot)
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self.checkBox_V_1.stateChanged.connect(self.plot_hide)
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self.checkBox_I_1.stateChanged.connect(self.plot_hide)
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self.checkBox_P_1.stateChanged.connect(self.plot_hide)
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self.checkBox_V_2.stateChanged.connect(self.plot_hide)
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self.checkBox_I_2.stateChanged.connect(self.plot_hide)
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self.checkBox_P_2.stateChanged.connect(self.plot_hide)
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self.V_set_1.editingFinished.connect(self.set_V)
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self.I_set_1.editingFinished.connect(self.set_I)
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self.Output_1.stateChanged.connect(self.set_Output)
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self.V_set_2.editingFinished.connect(self.set_V)
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self.I_set_2.editingFinished.connect(self.set_I)
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self.Output_2.stateChanged.connect(self.set_Output)
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#define constants
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self.Voltage = np.zeros((1,2)) #store voltage data
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self.Current = np.zeros((1,2)) #store current data
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self.Power = np.zeros((1,2)) #store power data
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self.t = [time.time()] #store timestamps
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self.Npoints = 200 #number of point to plot
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self.running = True #true while app is running
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self.disable_plot = False #constant to disable plot to improve performance. Is changed by checkbox checkBox_disableplots
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self.timing_save = 5 #save intervall [s]
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self.set_old = [0,0,1] #variable to save the 'old' set values to compare them to the global variables. It differs from set_new in the first iteration. This ensures that new parameters are send to the device
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self.set_new = [0,0,0] #variable to save the new set values to compare them to the old ones
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self.lines_config_float = [self.V_set_1,self.I_set_1,self.V_set_2,self.I_set_2,self.line_Nplot]#is used for config file
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self.lines_config_strings = [self.line_devAdr,self.line_filePath,self.line_saveInterval]#is used for config file
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self.checkboxes_config = [self.Output_1, self.Output_2,self.checkBox_disableplots,self.checkBox_save,
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self.checkBox_V_1, self.checkBox_I_1, self.checkBox_P_1, self.checkBox_V_2, self.checkBox_I_2, self.checkBox_P_2]#is used for config file
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#read default values from config and set them in gui
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self.read_default()
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# #write values from gui to global variables.
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self.set_V()
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self.set_I()
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self.set_Output()
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#update save intervall to the gui value
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self.change_timing()
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def start_meas(self):
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#Connect to device
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address = self.line_devAdr.text()
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self.BK = BK_9174B.BK_9174B(address)
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#start thread for communication with device
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self.worker = Worker(self.update_all)
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self.worker.signals.progress.connect(self.update_gui)
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self.threadpool.start(self.worker)
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#set voltage slew rate values. At the moment 0.5 V/ms is an arbitrary value
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self.BK.set_Voltage_slewrate(1, 0.5)
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self.BK.set_Voltage_slewrate(2, 0.5)
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def update_all(self, progress_callback):
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#get values from device and write them to global variables. Checks if global variables changed from last iteration. Also pass it to upddate_gui with emit(T)
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while self.running == True:
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for i,n in enumerate(['setU', 'setI', 'OutputOn']): #get new set values from global variables and compare to old ones.
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self.set_new[i] = self.sync_BK_9174B.get(n)
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if self.set_new != self.set_old: #if a button is clicked or global variables are changed the program checks which setting has been changed.
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if self.set_new[0] != self.set_old[0]: #if setU is changed new setU parameters are sent to device
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for CH in [1,2]: #for loop for both channels
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self.BK.set_Voltage(CH, self.set_new[0][CH-1]) #CH is element of [1,2] but setU parameters have indices of [0,1]
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if self.set_new[1] != self.set_old[1]: #if setI is changed new setI parameters are sent to device
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for CH in [1,2]: #for loop for both channels
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self.BK.set_Current(CH, self.set_new[1][CH-1]) #CH is element of [1,2] but setI parameters have indices of [0,1]
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if self.set_new[2] != self.set_old[2]: #if OutputOn is changed new OutputOn parameters are sent to device
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for CH in [1,2]: #for loop for both channels
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self.BK.set_Output(CH, self.set_new[2][CH-1]) #CH is element of [1,2] but OutputOn parameters have indices of [0,1]
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self.update_setValues(self.set_new) #Change GUI
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U = self.BK.read_Voltage() #read Voltage of both channels
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I = self.BK.read_Current() #read Current of both channels
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P = [np.round(U[0]*I[0],4),np.round(U[1]*I[1],4)] #calculates power by P=U*I and rounds to 4 digits
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#Write measurement values into global variables
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self.sync_BK_9174B.update({'U':U})
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self.sync_BK_9174B.update({'I':I})
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self.sync_BK_9174B.update({'P':P})
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progress_callback.emit([U,I,P]) #Emits list of all three lists U,I,P
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self.set_old = self.set_new[:] #List needs to be sliced so that only values are taken and not just a pointer is created
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# time.sleep(0.1)
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del(self.BK) #disconnect device when self.running is set to False
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def update_gui(self, List):
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#Convert List into original format
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U = List[0]
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I = List[1]
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P = List[2]
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#set numbers
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self.V_1.setText(str(U[0]))
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self.I_1.setText(str(I[0]))
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self.P_1.setText(str(P[0]))
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self.V_2.setText(str(U[1]))
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self.I_2.setText(str(I[1]))
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self.P_2.setText(str(P[1]))
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#Create database for plotting
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self.Voltage = np.vstack([self.Voltage, np.array(U)])
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self.Current = np.vstack([self.Current, np.array(I)])
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self.Power = np.vstack([self.Power, np.array(P)])
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# x = range(len(self.Temperature))
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self.t.append(time.time())
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#plot
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if self.disable_plot == False:
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self.plot_1.setData(self.t[-self.Npoints:],self.Voltage[-self.Npoints:,0])
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self.plot_2.setData(self.t[-self.Npoints:],self.Current[-self.Npoints:,0])
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self.plot_3.setData(self.t[-self.Npoints:],self.Power[-self.Npoints:,0])
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self.plot_4.setData(self.t[-self.Npoints:],self.Voltage[-self.Npoints:,1])
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self.plot_5.setData(self.t[-self.Npoints:],self.Current[-self.Npoints:,1])
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self.plot_6.setData(self.t[-self.Npoints:],self.Power[-self.Npoints:,1])
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def update_setValues(self,setV):
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#sets setvalues obtained from update_all in gui ['setU', 'setI', 'OutputOn']
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self.V_set_1.setText(f"{setV[0][0]}")
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self.I_set_1.setText(f"{setV[1][0]}")
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self.Output_1.setChecked(setV[2][0])
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self.V_set_2.setText(f"{setV[0][1]}")
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self.I_set_2.setText(f"{setV[1][1]}")
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self.Output_2.setChecked(setV[2][1])
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def set_V(self):
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#updates the set voltage in global variables. The change will be detected by update_all and it will be passed to the device
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setU = [get_float(self.V_set_1), get_float(self.V_set_2)]
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self.sync_BK_9174B.update({'setU':setU})
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def set_I(self):
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#updates the set current in global variables. The change will be detected by update_all and it will be passed to the device
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setI = [get_float(self.I_set_1), get_float(self.I_set_2)]
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self.sync_BK_9174B.update({'setI':setI})
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def set_Output(self):
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#updates the set Output in global variables. The change will be detected by update_all and it will be passed to the device
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setOutput = [self.Output_1.isChecked(), self.Output_2.isChecked()]
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self.sync_BK_9174B.update({'OutputOn':setOutput})
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def set_Npoints(self):
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#sets the number of points to plot
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self.Npoints = int(self.line_Nplot.text())
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def set_displot(self):
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#sets variable to disable plot so checkbox state does not need be read out every iteration
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self.disable_plot = self.checkBox_disableplots.isChecked()
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def plot_hide(self):
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#shows or hides plots according to the checkboxes next to the plot area
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boxes = [self.checkBox_V_1, self.checkBox_I_1, self.checkBox_P_1,
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self.checkBox_V_2, self.checkBox_I_2, self.checkBox_P_2]
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plots = plots = [self.plot_1, self.plot_2, self.plot_3, self.plot_4, self.plot_5,
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self.plot_6]
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for b,p in zip(boxes,plots):
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if b.isChecked() == True:
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p.show()
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else:
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p.hide()
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def change_timing(self):
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#updates the timing which is used for "save". If no value it given, it is set to 1 s
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self.timing_save = get_float(self.line_saveInterval,1)
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def save(self, progress_callback):
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#if save checkbox is checked it writes measurement values to file specified in line.filePath. There the full path including file extension must be given.
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while self.running == True:
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time.sleep(self.timing_save) #wait is at beginning so first point is not corrupted when app just started.
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if self.checkBox_save.isChecked() == True:
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path = self.line_filePath.text()
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if os.path.isfile(path) == False:
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with open(path,'a') as file:
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file.write('date\tV Ch:1[V]\tI Ch:1[A]\tP Ch:1[W]\tV Ch:2[V]\tI Ch:2[A]\tP Ch:2[W]\n')
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file = open(path,'a')
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file.write(time.strftime("%Y-%m-%d_%H-%M-%S",time.localtime(self.t[-1]))+'\t')
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for i in [0,1]: #Loop for both channels
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file.write(f"{self.Voltage[-1,i]}\t")
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file.write(f"{self.Current[-1,i]}\t")
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file.write(f"{self.Power[-1,i]}\t")
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file.write('\n')
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file.close
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def set_default(self):
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#saves current set values to txt file in subdirectory configs. All entries that are saved are defined in self.lines_config
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#Overwrites old values in config file.
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current_dir = os.path.dirname(os.path.abspath(__file__))
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path = current_dir+'\\configs\\BK9174B_2_config.txt' #To make shure the config file is at the right place, independent from where the program is started the location of the file is retrieved
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file = open(path,'w')
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for l in self.lines_config_float:
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temp = f"{get_float(l)}"
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file.write(temp+'\t')
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for l in self.lines_config_strings:
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file.write(l.text()+'\t')
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for c in self.checkboxes_config:
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file.write(str(c.isChecked())+'\t')
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file.write('\n')
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file.close
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def read_default(self):
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#reads default values from config file in subdirectory config and sets the values in gui. Then self.change is set to true so values are send
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#to device. (If no config file exists, it does nothing.)
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current_dir = os.path.dirname(os.path.abspath(__file__))
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path = current_dir+'\\configs\\BK9174B_2_config.txt' #To make shure the config file is read from the right place, independent from where the program is started the location of the file is retrieved
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try: #exit function if config file does not exist
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vals = import_txt.read_raw(path)
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except:
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print('no config file found on')
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print(path)
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return
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formats = ['.2f', '.2f', '.2f','.2f','.2f','.0f']
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for l,v,f in zip(self.lines_config_float,vals[0],formats):
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v = float(v) #convert string in txt to float, so number can be formatted according to "formats" when it's set
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l.setText(format(v,f))
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for l,v in zip(self.lines_config_strings,vals[0][len(self.lines_config_float):]):
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l.setText(v)
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for c,v in zip(self.checkboxes_config,vals[0][len(self.lines_config_float)+len(self.lines_config_strings):]):
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c.setChecked(v == 'True')
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self.change = True
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def closeEvent(self,event): #when window is closed self.running is set to False, so all threads stop
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self.running = False
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time.sleep(1)
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event.accept()
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app = QApplication(sys.argv)
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window = MainWindow()
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window.show()
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app.exec() |