why tkinter start stop infinite loop doesn't process

I want to start an infinite loop after pressing START button. But I' m having problem for giving the initial values for the internal index. After the loop started it must change the value of j to bigger than 0 and the loop will perform other tasks. However this doesn't happen and the loop doesn't enter "elif" section. So could you give some help how to process this loop ?

This is the main part of the whole gui code.

Code (Python):

1.  
2. from Tkinter import *
3. import serial
4. from threading import Timer
5.  
6. port = serial.Serial('/dev/ttyUSB0', 115200)
7.  
8. PC1 = open("File_1.txt","a")
9. PC2 = open("File_2.txt","a")
10. PC3 = open("File_3.txt","a")
11. PC4 = open("File_4.txt","a")
12. PC5 = open("File_5.txt","a")
13. PC6 = open("File_6.txt","a")
14. PC7 = open("File_7.txt","a")
15. PC8 = open("File_8.txt","a")
16.  
17.  
18. HMCC=Tk()
19.  
20. HMCC.title(" GUIs v1.0 ")
21. HMCC.geometry("750x500")
22.  
23. control_var = 0
24.  
25. def start():
26.     global t
27.     t=Timer(1,start)
28.     t.start()
29.     print("Data Transmission started ... ! ")
30.     global control_var
31.     control_var= 1
32.  
33.  
34. def stop():
35.     global control_var
36.     control_var = 0
37.     global t
38.     if t:
39.         t.cancel()  
40.  
41.  
42. def scanning():
43.     j=0
44.     k=0
45.     m=[]
46.     ii=0
47.     global control_var
48.  
49.     if control_var == 1 :
50.  
51.         print "Running..."
52.      
53.         raw_data     = ord(port.read())
54.         bin_raw_data = bin(raw_data)[2:].zfill(8)
55.         print(raw_data)
56.      
57.         if raw_data==127:  
58.             k=0
59.             j=j+1
60.             print '\n-----',j,'------------------------------ \n'
61.             m=[]
62.      
63.         elif j > 0 :
64.          
65.             m.append(bin_raw_data)
66.             k=k+1
67.             if k == 24    :  
68.                 for ii in range(0,8) :
69.                  
70.                     Count_bin=m[ii*3]+m[ii*3+1]+m[ii*3+2]
71.                     Count=int(Count_bin,2)
72.                  
73.                     print 'Channel:',ii+1,'  ' , Count
74.                  
75.                     if   ii==0:  
76.                         PC1.write(str(Count) + "\n")
77.                         count_1.config(raw_data)                      
78.                     elif ii==1:  
79.                         PC2.write(str(Count) + "\n")
80.                         count_2.config(raw_data)                      
81.                     elif ii==2:  
82.                         PC3.write(str(Count) + "\n")
83.                         count_3.config(raw_data)                      
84.                     elif ii==3:  
85.                         PC4.write(str(Count) + "\n")
86.                         count_4.config(raw_data)                      
87.                     elif ii==4:  
88.                         PC5.write(str(Count) + "\n")
89.                         count_5.config(raw_data)                      
90.                     elif ii==5:  
91.                         PC6.write(str(Count) + "\n")
92.                         count_6.config(raw_data)                      
93.                     elif ii==6:  
94.                         PC7.write(str(Count) + "\n")
95.                         count_7.config(raw_data)                      
96.                     elif ii==7:
97.                         PC8.write(str(Count) + "\n")
98.                         count_8.config(raw_data)                      
99.  
100.  
101. count_1 = Label(HMCC)
102. count_2 = Label(HMCC)
103. count_3 = Label(HMCC)
104. count_4 = Label(HMCC)
105. count_5 = Label(HMCC)
106. count_6 = Label(HMCC)
107. count_7 = Label(HMCC)
108. count_8 = Label(HMCC)
109.  
110. count_1.place(relx=.6, rely=.1, anchor="c")
111. count_2.place(relx=.6, rely=.2, anchor="c")
112. count_3.place(relx=.6, rely=.3, anchor="c")
113. count_4.place(relx=.6, rely=.4, anchor="c")
114. count_5.place(relx=.6, rely=.5, anchor="c")
115. count_6.place(relx=.6, rely=.6, anchor="c")
116. count_7.place(relx=.6, rely=.7, anchor="c")
117. count_8.place(relx=.6, rely=.8, anchor="c")
118.  
119.  
120. Channel_1 = Label(HMCC, text = "Channel 1 : ")
121. Channel_2 = Label(HMCC, text = "Channel 2 : ")
122. Channel_3 = Label(HMCC, text = "Channel 3 : ")
123. Channel_4 = Label(HMCC, text = "Channel 4 : ")
124. Channel_5 = Label(HMCC, text = "Channel 5 : ")
125. Channel_6 = Label(HMCC, text = "Channel 6 : ")
126. Channel_7 = Label(HMCC, text = "Channel 7 : ")
127. Channel_8 = Label(HMCC, text = "Channel 8 : ")
128.  
129. Channel_1.place(relx=.4, rely=.1, anchor="c")
130. Channel_2.place(relx=.4, rely=.2, anchor="c")
131. Channel_3.place(relx=.4, rely=.3, anchor="c")
132. Channel_4.place(relx=.4, rely=.4, anchor="c")
133. Channel_5.place(relx=.4, rely=.5, anchor="c")
134. Channel_6.place(relx=.4, rely=.6, anchor="c")
135. Channel_7.place(relx=.4, rely=.7, anchor="c")
136. Channel_8.place(relx=.4, rely=.8, anchor="c")
137.  
138. button1 = Button(text="   START   " , fg="black"  ,command=start )
139. button2 = Button(text=" PAUSE "     , fg="black" )
140. button3 = Button(text="    STOP    ", fg="black",command=stop)
141. button4 = Button(text="QUIT"        , fg="black",command=HMCC.quit)
142.  
143. button1.place(relx=.1, rely=.2, anchor="c")
144. button2.place(relx=.1, rely=.3, anchor="c")
145. button3.place(relx=.1, rely=.4, anchor="c")
146. button4.place(relx=.1, rely=.5, anchor="c")
147.  
148.  
149.  
150. HMCC.mainloop()
151.  
152. PC1.close()
153. PC2.close()
154. PC3.close()
155. PC4.close()
156. PC5.close()
157. PC6.close()
158. PC7.close()
159. PC8.close()
160.  
161.  

Thanks in advance ...

 

If you want, please, attach this piece of code as a small program that can be compiled.

Also indicates the compiler.
I would like to compile it too.

 

Hi @Motanache

Thank you for your interest.
I've uploaded the complete GUI script. I just type "sudo python name_of_the_script.py" to open the GUI.

 

Unfortunately, I was unable to run it.You also use a USB-serial converter.

I do not think I can answer.