Hello all,
I am new to pyqtgraph, and I can plot data from com port in real time, but
I can't exit the window to run the rest of the code. I've tried to
implement a while loop += 1 and a set number of "samples" n, to no avail.
Any suggestions would be highly appretiated
# -*- coding: utf-8 -*-
from pyqtgraph.Qt import QtGui, QtCore
import numpy as np
from numpy import arange, sin, cos, pi
import pyqtgraph as pg
import sys
import serial
import time
def bytes_to_int(bytes): # Bytes to integers
result = 0
for b in bytes:
result = result * 256 + int(b)
return result
class Plot2D():
def __init__(self):
self.traces = dict()
#QtGui.QApplication.setGraphicsSystem('raster')
self.app = QtGui.QApplication([])
#mw = QtGui.QMainWindow()
#mw.resize(800,800)
self.win = pg.GraphicsWindow(title="Señal")
self.win.resize(1000,600)
self.win.setWindowTitle('Voltaje')
# Enable antialiasing for prettier plots
pg.setConfigOptions(antialias=True)
self.canvas = self.win.addPlot(title="Medicion")
def start(self):
if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
QtGui.QApplication.instance().exec_()
def trace(self,name,dataset_x,dataset_y):
if name in self.traces:
self.traces[name].setData(dataset_x,dataset_y)
else:
self.traces[name] = self.canvas.plot(pen='y')
val_vol = []
val_time = []
n = 40
count = 0
#i = 0
while (count <= n):
## Start Qt event loop unless running in interactive mode or using pyside.
if __name__ == '__main__':
p = Plot2D()
#i = 0
count = 0
def update():
global p, count
ser = serial.Serial(port='com11', baudrate=9600)
rawvol = ser.read()
vol = bytes_to_int(rawvol)
val_vol.append(vol)
val_time.append(time.clock())
p.trace("sin",val_time,val_vol)
#i += 0.1
print(val_vol)
count += 1
timer = QtCore.QTimer()
timer.timeout.connect(update)
timer.start(50)
p.start()
sys.exit()
print(count)
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