可以显示波形，而且可以同时显示多个波形
https://github.com/XIVN1987/SERCOM
需要先安装pyQT5和pyQTChart
#! python3
import os
import sys
import configparser
from PyQt5 import QtCore, QtGui, uic
from PyQt5.QtCore import pyqtSlot, Qt
from PyQt5.QtWidgets import QApplication, QWidget
from PyQt5.QtChart import QChart, QChartView, QLineSeries
from serial import Serial
from serial.tools.list_ports import comports
N_CURVES = 4
'''
from SERCOM_UI import Ui_SERCOM
class SERCOM(QWidget, Ui_SERCOM):
def __init__(self, parent=None):
super(SERCOM, self).__init__(parent)
self.setupUi(self)
'''
class SERCOM(QWidget):
def __init__(self, parent=None):
super(SERCOM, self).__init__(parent)
uic.loadUi('SERCOM.ui', self)
for port, desc, hwid in comports():
self.cmbPort.addItem(f'{port} ({desc[:desc.index("(")]})')
self.ser = Serial()
self.initSetting()
self.initQwtPlot()
self.rcvbuff = b''
self.tmrSer = QtCore.QTimer()
self.tmrSer.setInterval(10)
self.tmrSer.timeout.connect(self.on_tmrSer_timeout)
self.tmrSer.start()
self.tmrSer_Cnt = 0
def initSetting(self):
if not os.path.exists('setting.ini'):
open('setting.ini', 'w', encoding='utf-8')
self.conf = configparser.ConfigParser()
self.conf.read('setting.ini', encoding='utf-8')
if not self.conf.has_section('serial'):
self.conf.add_section('serial')
self.conf.set('serial', 'port', 'COM0')
self.conf.set('serial', 'baud', '9600')
self.conf.add_section('history')
self.conf.set('history', 'hist1', '')
self.conf.set('history', 'hist2', '')
self.txtSend.setPlainText(self.conf.get('history', 'hist1'))
index = self.cmbPort.findText(self.conf.get('serial', 'port'))
self.cmbPort.setCurrentIndex(index if index != -1 else 0)
self.cmbBaud.setCurrentIndex(self.cmbBaud.findText(self.conf.get('serial', 'baud')))
def initQwtPlot(self):
self.PlotData = [[0]*1000 for i in range(N_CURVES)]
self.PlotPoint = [[QtCore.QPointF(j, 0) for j in range(1000)] for i in range(N_CURVES)]
self.PlotChart = QChart()
self.ChartView = QChartView(self.PlotChart)
self.ChartView.setVisible(False)
self.vLayout0.insertWidget(0, self.ChartView)
self.PlotCurve = [QLineSeries() for i in range(N_CURVES)]
@pyqtSlot()
def on_btnOpen_clicked(self):
if not self.ser.is_open:
try:
self.ser.timeout = 1
self.ser.xonxoff = 0
self.ser.port = self.cmbPort.currentText().split()[0]
self.ser.parity = self.cmbChek.currentText()[0]
self.ser.baudrate = int(self.cmbBaud.currentText())
self.ser.bytesize = int(self.cmbData.currentText())
self.ser.stopbits = int(self.cmbStop.currentText())
self.ser.open()
except Exception as e:
self.txtMain.clear()
self.txtMain.insertPlainText(str(e))
else:
self.cmbPort.setEnabled(False)
self.btnOpen.setText('关闭串口')
else:
self.ser.close()
self.cmbPort.setEnabled(True)
self.btnOpen.setText('打开串口')
@pyqtSlot()
def on_btnSend_clicked(self):
if self.ser.is_open:
text = self.txtSend.toPlainText()
if self.chkHEXSend.isChecked():
try:
text = ' '.join([chr(int(x,16)) for x in text.split()])
except Exception as e:
print(e)
else:
text = text.replace('\n', '\r\n')
self.ser.write(text.encode('latin'))
def on_tmrSer_timeout(self):
if self.ser.is_open:
num = self.ser.in_waiting
if num > 0:
self.rcvbuff += self.ser.read(num)
if self.chkWavShow.checkState() == Qt.Unchecked:
if self.chkHEXShow.isChecked():
text = ' '.join(f'{x:02X}' for x in self.rcvbuff) + ' '
self.rcvbuff = b''
else:
text = ''
while len(self.rcvbuff) > 1:
if self.rcvbuff[0] < 0x7F:
text += chr(self.rcvbuff[0])
self.rcvbuff = self.rcvbuff[1:]
else:
try:
hanzi = self.rcvbuff[:2].decode('gbk')
except Exception as e:
text += f'\\x{self.rcvbuff[0]:02X}'
self.rcvbuff = self.rcvbuff[1:]
else:
text += hanzi
self.rcvbuff = self.rcvbuff[2:]
if len(self.txtMain.toPlainText()) > 25000: self.txtMain.clear()
self.txtMain.moveCursor(QtGui.QTextCursor.End)
self.txtMain.insertPlainText(text)
else:
if self.rcvbuff.rfind(b',') == -1: return
try:
d = self.rcvbuff[0:self.rcvbuff.rfind(b',')].split(b',') # [b'12', b'34'] or [b'12 34', b'56 78']
d = [[float(x) for x in X.strip().split()] for X in d] # [[12], [34]] or [[12, 34], [56, 78]]
for arr in d:
for i, x in enumerate(arr):
if i == N_CURVES: break
self.PlotData[i].pop(0)
self.PlotData[i].append(x)
self.PlotPoint[i].pop(0)
self.PlotPoint[i].append(QtCore.QPointF(999, x))
self.rcvbuff = self.rcvbuff[self.rcvbuff.rfind(b',')+1:]
self.tmrSer_Cnt += 1
if self.tmrSer_Cnt % 4 == 0:
if len(d[-1]) != len(self.PlotChart.series()):
for series in self.PlotChart.series():
self.PlotChart.removeSeries(series)
for i in range(min(len(d[-1]), N_CURVES)):
self.PlotCurve[i].setName(f'Curve {i+1}')
self.PlotChart.addSeries(self.PlotCurve[i])
self.PlotChart.createDefaultAxes()
for i in range(len(self.PlotChart.series())):
for j, point in enumerate(self.PlotPoint[i]):
point.setX(j)
self.PlotCurve[i].replace(self.PlotPoint[i])
miny = min([min(d) for d in self.PlotData[:len(self.PlotChart.series())]])
maxy = max([max(d) for d in self.PlotData[:len(self.PlotChart.series())]])
self.PlotChart.axisY().setRange(miny, maxy)
self.PlotChart.axisX().setRange(0000, 1000)
except Exception as e:
self.rcvbuff = b''
print(e)
@pyqtSlot(int)
def on_chkWavShow_stateChanged(self, state):
self.ChartView.setVisible(state == Qt.Checked)
self.txtMain.setVisible(state == Qt.Unchecked)
@pyqtSlot(str)
def on_cmbBaud_currentIndexChanged(self, text):
self.ser.baudrate = int(text)
@pyqtSlot(str)
def on_cmbData_currentIndexChanged(self, text):
self.ser.bytesize = int(text)
@pyqtSlot(str)
def on_cmbChek_currentIndexChanged(self, text):
self.ser.parity = text[0]
@pyqtSlot(str)
def on_cmbStop_currentIndexChanged(self, text):
self.ser.stopbits = int(text)
@pyqtSlot()
def on_btnClear_clicked(self):
self.txtMain.clear()
def closeEvent(self, evt):
self.ser.close()
self.conf.set('serial', 'port', self.cmbPort.currentText())
self.conf.set('serial', 'baud', self.cmbBaud.currentText())
self.conf.set('history', 'hist1', self.txtSend.toPlainText())
self.conf.write(open('setting.ini', 'w', encoding='utf-8'))
if __name__ == "__main__":
app = QApplication(sys.argv)
ser = SERCOM()
ser.show()
app.exec_()