PyQt下多线程使用案例
程序的主要功能 1.串口接收数据 2.解析串口指令帖并得到命令参数 3。根据命令参数更新GUI 其中1和2在一个线程，3在一个线程。
指令格式 [int('7e',16),int('7e',16),0,0,0,0,0,0,int('8e',16),int('8e',16)]。中间的为数据，两端为帖头和帧尾，没有加检验。
GUI如图
1 ##-*- coding: utf-8-* 2 #!D:\ProgramData\Anaconda2\python.exe 3 """ 4 Author : LEON 5 EMAIL:yangli0534@yahoo.com 6 程序的主要功能 7 1.串口接收数据 8 2.解析串口指令帖并得到命令参数 9 3。根据命令参数更新GUI 10 其中1和2在一个线程，3在一个线程 11 """ 12 import sys 13 import math 14 import time 15 import serial 16 from PyQt5 import QtCore, QtGui, uic, QtPrintSupport, QtWidgets 17 import serial.tools.list_ports 18 from threading import Thread 19 from PyQt5.QtCore import * 20 from PyQt5.QtGui import * 21 from PyQt5.QtWidgets import * 22 23 24 qtCreatorFile = "panel.ui"# GUI file 25 Ui_MainWindow, QtBaseClass=uic.loadUiType(qtCreatorFile) 26 27 class MyApp(QtWidgets.QMainWindow, Ui_MainWindow): 28 angle = pyqtSignal(dict) # thread signal 29 30 def __init__(self): 31 32 QtWidgets.QMainWindow.__init__(self) 33 Ui_MainWindow.__init__(self) 34 QThread.__init__(self) 35 # bkg = QtGui.QPalette() 36 # bkg.setColor(self.backgroundRole(),QColor(192,253,123)) 37 # self.setPalette(bkg) 38 self.setupUi(self) 39 self.ser =serial.Serial()#serial port handle 40 port_list = list(serial.tools.list_ports.comports())#find serial port avaliable 41 NoSerial = len(port_list)#number of avaliable serial port 42 if NoSerial> 0: 43 for port in port_list: 44 self.comboBox_serial_No.addItem(port[0])#add to comboBox 45 baudrate = [9600,14400, 19200, 38400, 56000, 57600, 115200]#baudrate 46 for baud in baudrate: 47 self.comboBox_serial_baudrate.addItem(str(baud)) 48 self.comboBox_serial_baudrate.setCurrentIndex(len(baudrate)-1)#default baudrate 49 self.comboBox_serial_No.setCurrentIndex(NoSerial-1)#default port 50 self.pushButton_open.clicked.connect(self.open) #serial port open event connted to button clicked 51 52 self.pushButton_send.clicked.connect(self.send) #send data event 53 #self.lcdNumber.display(ord('a')) 54 #self.param = {"p1":0,"p2":0,"p3":0} 55 self.para1 = 0 # cmd initialization 56 self.para2 = 0 57 self.para3 = 0 58 self.para4 = 0 59 self.para5 = 0 60 self.para6 = 0 61 #self.angle.connect(self.lcdNumber.display) 62 self.angle.connect(self.paraP) 63 #self.angle.connect(self.label_3.setText) 64 self.sec = 0 65 #self.dial.setValue(90) 66 #self.label_tip_2.valueChanged.connect(self.dial.setValue()) 67 #self.dial.setFocusPolicy(Qt.StrongFocus) 68 #self.angle.connect(self.dial.setValue) 69 #self.dial.valueChanged.connect(self.slider.setValue) 70 #con = threading.Condition() 71 #rece=threading.Thread(target=self.receive,args=()) 72 #rece.start() 73 self.threads =[] 74 t1 = Thread(target=self.receive) 75 t1.setDaemon(True) # 76 t1.start()#start receiving data thread 77 self.threads.append(t1) 78 t2 =Thread(target=self.updateP) 79 t2.setDaemon(True) 80 t2.start() # start update GUI thread 81 self.threads.append(t2) 82 #self.updateP() 83 84 def open(self):#open serial port 85 port = self.comboBox_serial_No.currentText() 86 baudrate = int(self.comboBox_serial_baudrate.currentText()) 87 if not self.ser.isOpen(): 88 #self.label_tip.setText('this port has been opened') 89 #self.ser.close() 90 #self.pushButton_open.setText('已断开') 91 #self.label_tip.setText('closed') 92 #else: 93 self.ser = serial.Serial(port, baudrate, timeout = 10) 94 if self.ser.isOpen(): 95 self.pushButton_open.setText('已连接') 96 self.label_tip.setText('open sucessed!') 97 self.ser.write('roger!') 98 else: 99 self.label_tip.setText('open failed!') 100 def send(self): #send data 101 if self.ser.isOpen(): 102 text = self.lineEdit_sendBuffer.text() 103 self.ser.write(str(text)) 104 def receive(self):# receive data from uart and analysis the protocol frame to get the parameter 105 #, and then emit to main thread 106 #self.sec += 1 107 #self.lcdNumber.display(self.sec) 108 fsm = 0 109 info = 0 110 while True: 111 if self.ser.isOpen(): 112 try: 113 text = self.ser.read(1) #read one byte from uart 114 if not text : 115 break 116 else: 117 #self.label_3.setText(str(fsm)) 118 text = ord(text) 119 if fsm == 0:#frame analysis FSM 120 if text ==int('7e',16): 121 fsm = 1 122 else: 123 fsm = 0 124 elif fsm == 1: 125 info = {"p1":0,"p2":0,"p3":0,"p4":0,"p5":0,"p6":0} 126 if text ==int('7e',16): 127 fsm = 2 128 else: 129 fsm = 0 130 elif fsm == 2: 131 info["p1"]=text 132 fsm = 3 133 elif fsm == 3: 134 info["p2"]=text 135 fsm = 4 136 elif fsm == 4: 137 info["p3"]=text 138 fsm = 5 139 elif fsm == 5: 140 info["p4"]=text 141 fsm = 6 142 elif fsm == 6: 143 info["p5"]=text 144 fsm = 7 145 elif fsm == 7: 146 info["p6"]=text 147 fsm = 8 148 elif fsm == 8: 149 if text ==int('8e',16): 150 fsm = 9 151 elif text ==int('7e',16): 152 fsm = 1 153 else: 154 fsm = 0 155 elif fsm ==9: 156 if text ==int('8e',16): 157 fsm = 0 158 self.angle.emit(dict(info))#emit signal to main programe 159 elif text ==int('7e',16): 160 fsm = 1 161 else: 162 fsm = 0 163 #self.angle.emit(str(text)) 164 #self.dial.setValue(int(text)) 165 #self.angle.emit(str((text))) 166 167 #self.angle1.emit(int(text)) 168 except: 169 break 170 171 #if self.ser.isOpen(): 172 # try: 173 # text = self.ser.read(1) 174 # if not text : 175 # break 176 # else: 177 # self.angle.emit(str(ord(text))) 178 # #self.dial.setValue(int(text)) 179 # #self.angle.emit(str((text))) 180 181 # #self.angle1.emit(int(text)) 182 # except: 183 # break 184 def paraP(self,r_dict):#update GUI 185 self.para1 = r_dict["p1"]*256+r_dict["p2"] 186 self.para2 = r_dict["p3"]*256+r_dict["p4"] 187 self.para3 = r_dict["p5"]*256+r_dict["p6"] 188 #self.para4 = r_dict["p4"] 189 #self.para5 = r_dict["p5"] 190 #self.para6 = r_dict["p6"] 191 def updateP(self): 192 #self.sec += 1 193 #self.lcdNumber.display(self.sec) 194 while True: 195 # if self.sec < 180: 196 # self.sec += 1 197 # else: 198 # self.sec = 0 199 #time.sleep(0.5) 200 #print("Thread update--sec="), 201 #print(self.sec), 202 #print("tmp="), 203 time.sleep(1.0/10.00) 204 tmp =str(1.0*self.para1/100.0) 205 self.lcdNumber_2.display(tmp) 206 tmp =str(1.0*self.para2/100.0) 207 self.lcdNumber_3.display(tmp) 208 tmp =str(1.00*self.para3/100.00) 209 self.lcdNumber.display(tmp) 210 #print(tmp) 211 #self.label_tip_3.setText(tmp) 212 #print(len(tmp)) 213 #if len(tmp) <4: 214 tmp = int(str(self.para3),10) 215 #print("Number = "), 216 #print(tmp) 217 #self.label_3.setText(str(tmp)) 218 #if tmp > 0 and tmp < 180: 219 self.dial.setValue(tmp) 220 221 222 if __name__ == "__main__": 223 app = QtWidgets.QApplication(sys.argv) 224 w = MyApp() 225 w.show() 226 #for t in w.threads: 227 #t.setDaemon(True) 228 #t.start() 229 #w.updateP() 230 # while True: 231 # time.sleep(0.1) 232 # tmp =str(w.label_tip_2.text()) 233 # if tmp.isdigit(): 234 # tmp = int(tmp,10) 235 # if tmp > 0 and tmp < 180 : 236 # w.dial.setValue(tmp) 237 # self.lcdNumber.display(tmp) 238 sys.exit(app.exec_()) 239
OPTIMISM, PASSION & HARDWORK
