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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:[email protected]
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
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)
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
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
236 # w.dial.setValue(tmp)
237 # self.lcdNumber.display(tmp)
238 sys.exit(app.exec_())
239 PyQt下多线程使用案例
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